| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
When performing a file read from RDMA, smbd_recv() prints an "Invalid msg
type 4" error and fails the I/O. This is due to the switch-statement there
not handling the ITER_FOLIOQ handed down from netfslib.
Fix this by collapsing smbd_recv_buf() and smbd_recv_page() into
smbd_recv() and just using copy_to_iter() instead of memcpy(). This
future-proofs the function too, in case more ITER_* types are added.
Fixes: ee4cdf7ba857 ("netfs: Speed up buffered reading")
Reported-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Tom Talpey <tom@talpey.com>
cc: Paulo Alcantara (Red Hat) <pc@manguebit.com>
cc: Matthew Wilcox <willy@infradead.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
The handling of received data in the smbdirect client code involves using
copy_to_iter() to copy data from the smbd_reponse struct's packet trailer
to a folioq buffer provided by netfslib that encapsulates a chunk of
pagecache.
If, however, CONFIG_HARDENED_USERCOPY=y, this will result in the checks
then performed in copy_to_iter() oopsing with something like the following:
CIFS: Attempting to mount //172.31.9.1/test
CIFS: VFS: RDMA transport established
usercopy: Kernel memory exposure attempt detected from SLUB object 'smbd_response_0000000091e24ea1' (offset 81, size 63)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:102!
...
RIP: 0010:usercopy_abort+0x6c/0x80
...
Call Trace:
<TASK>
__check_heap_object+0xe3/0x120
__check_object_size+0x4dc/0x6d0
smbd_recv+0x77f/0xfe0 [cifs]
cifs_readv_from_socket+0x276/0x8f0 [cifs]
cifs_read_from_socket+0xcd/0x120 [cifs]
cifs_demultiplex_thread+0x7e9/0x2d50 [cifs]
kthread+0x396/0x830
ret_from_fork+0x2b8/0x3b0
ret_from_fork_asm+0x1a/0x30
The problem is that the smbd_response slab's packet field isn't marked as
being permitted for usercopy.
Fix this by passing parameters to kmem_slab_create() to indicate that
copy_to_iter() is permitted from the packet region of the smbd_response
slab objects, less the header space.
Fixes: ee4cdf7ba857 ("netfs: Speed up buffered reading")
Reported-by: Stefan Metzmacher <metze@samba.org>
Link: https://lore.kernel.org/r/acb7f612-df26-4e2a-a35d-7cd040f513e1@samba.org/
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Tested-by: Stefan Metzmacher <metze@samba.org>
cc: Paulo Alcantara <pc@manguebit.com>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Fix cifs_signal_cifsd_for_reconnect() to take the correct lock order
and prevent the following deadlock from happening
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc3-build2+ #1301 Tainted: G S W
------------------------------------------------------
cifsd/6055 is trying to acquire lock:
ffff88810ad56038 (&tcp_ses->srv_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x134/0x200
but task is already holding lock:
ffff888119c64330 (&ret_buf->chan_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0xcf/0x200
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ret_buf->chan_lock){+.+.}-{3:3}:
validate_chain+0x1cf/0x270
__lock_acquire+0x60e/0x780
lock_acquire.part.0+0xb4/0x1f0
_raw_spin_lock+0x2f/0x40
cifs_setup_session+0x81/0x4b0
cifs_get_smb_ses+0x771/0x900
cifs_mount_get_session+0x7e/0x170
cifs_mount+0x92/0x2d0
cifs_smb3_do_mount+0x161/0x460
smb3_get_tree+0x55/0x90
vfs_get_tree+0x46/0x180
do_new_mount+0x1b0/0x2e0
path_mount+0x6ee/0x740
do_mount+0x98/0xe0
__do_sys_mount+0x148/0x180
do_syscall_64+0xa4/0x260
entry_SYSCALL_64_after_hwframe+0x76/0x7e
-> #1 (&ret_buf->ses_lock){+.+.}-{3:3}:
validate_chain+0x1cf/0x270
__lock_acquire+0x60e/0x780
lock_acquire.part.0+0xb4/0x1f0
_raw_spin_lock+0x2f/0x40
cifs_match_super+0x101/0x320
sget+0xab/0x270
cifs_smb3_do_mount+0x1e0/0x460
smb3_get_tree+0x55/0x90
vfs_get_tree+0x46/0x180
do_new_mount+0x1b0/0x2e0
path_mount+0x6ee/0x740
do_mount+0x98/0xe0
__do_sys_mount+0x148/0x180
do_syscall_64+0xa4/0x260
entry_SYSCALL_64_after_hwframe+0x76/0x7e
-> #0 (&tcp_ses->srv_lock){+.+.}-{3:3}:
check_noncircular+0x95/0xc0
check_prev_add+0x115/0x2f0
validate_chain+0x1cf/0x270
__lock_acquire+0x60e/0x780
lock_acquire.part.0+0xb4/0x1f0
_raw_spin_lock+0x2f/0x40
cifs_signal_cifsd_for_reconnect+0x134/0x200
__cifs_reconnect+0x8f/0x500
cifs_handle_standard+0x112/0x280
cifs_demultiplex_thread+0x64d/0xbc0
kthread+0x2f7/0x310
ret_from_fork+0x2a/0x230
ret_from_fork_asm+0x1a/0x30
other info that might help us debug this:
Chain exists of:
&tcp_ses->srv_lock --> &ret_buf->ses_lock --> &ret_buf->chan_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ret_buf->chan_lock);
lock(&ret_buf->ses_lock);
lock(&ret_buf->chan_lock);
lock(&tcp_ses->srv_lock);
*** DEADLOCK ***
3 locks held by cifsd/6055:
#0: ffffffff857de398 (&cifs_tcp_ses_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x7b/0x200
#1: ffff888119c64060 (&ret_buf->ses_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0x9c/0x200
#2: ffff888119c64330 (&ret_buf->chan_lock){+.+.}-{3:3}, at: cifs_signal_cifsd_for_reconnect+0xcf/0x200
Cc: linux-cifs@vger.kernel.org
Reported-by: David Howells <dhowells@redhat.com>
Fixes: d7d7a66aacd6 ("cifs: avoid use of global locks for high contention data")
Reviewed-by: David Howells <dhowells@redhat.com>
Tested-by: David Howells <dhowells@redhat.com>
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
The generate '[FAILED TO PARSE]' strings in trace-cmd report output like this:
rm-5298 [001] 6084.533748493: smb3_exit_err: [FAILED TO PARSE] xid=972 func_name=cifs_rmdir rc=-39
rm-5298 [001] 6084.533959234: smb3_enter: [FAILED TO PARSE] xid=973 func_name=cifs_closedir
rm-5298 [001] 6084.533967630: smb3_close_enter: [FAILED TO PARSE] xid=973 fid=94489281833 tid=1 sesid=96758029877361
rm-5298 [001] 6084.534004008: smb3_cmd_enter: [FAILED TO PARSE] tid=1 sesid=96758029877361 cmd=6 mid=566
rm-5298 [001] 6084.552248232: smb3_cmd_done: [FAILED TO PARSE] tid=1 sesid=96758029877361 cmd=6 mid=566
rm-5298 [001] 6084.552280542: smb3_close_done: [FAILED TO PARSE] xid=973 fid=94489281833 tid=1 sesid=96758029877361
rm-5298 [001] 6084.552316034: smb3_exit_done: [FAILED TO PARSE] xid=973 func_name=cifs_closedir
Cc: stable@vger.kernel.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
transmit all data
We should not send smbdirect_data_transfer messages larger than
the negotiated max_send_size, typically 1364 bytes, which means
24 bytes of the smbdirect_data_transfer header + 1340 payload bytes.
This happened when doing an SMB2 write with more than 1340 bytes
(which is done inline as it's below rdma_readwrite_threshold).
It means the peer resets the connection.
When testing between cifs.ko and ksmbd.ko something like this
is logged:
client:
CIFS: VFS: RDMA transport re-established
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
siw: got TERMINATE. layer 1, type 2, code 2
CIFS: VFS: \\carina Send error in SessSetup = -11
smb2_reconnect: 12 callbacks suppressed
CIFS: VFS: reconnect tcon failed rc = -11
CIFS: VFS: reconnect tcon failed rc = -11
CIFS: VFS: reconnect tcon failed rc = -11
CIFS: VFS: SMB: Zero rsize calculated, using minimum value 65536
and:
CIFS: VFS: RDMA transport re-established
siw: got TERMINATE. layer 1, type 2, code 2
CIFS: VFS: smbd_recv:1894 disconnected
siw: got TERMINATE. layer 1, type 2, code 2
The ksmbd dmesg is showing things like:
smb_direct: Recv error. status='local length error (1)' opcode=128
smb_direct: disconnected
smb_direct: Recv error. status='local length error (1)' opcode=128
ksmbd: smb_direct: disconnected
ksmbd: sock_read failed: -107
As smbd_post_send_iter() limits the transmitted number of bytes
we need loop over it in order to transmit the whole iter.
Reviewed-by: David Howells <dhowells@redhat.com>
Tested-by: David Howells <dhowells@redhat.com>
Tested-by: Meetakshi Setiya <msetiya@microsoft.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: linux-cifs@vger.kernel.org
Cc: <stable+noautosel@kernel.org> # sp->max_send_size should be info->max_send_size in backports
Fixes: 3d78fe73fa12 ("cifs: Build the RDMA SGE list directly from an iterator")
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Some users and customers reported that their backup/copy tools started
to fail when the directory being copied contained symlink targets that
the client couldn't parse - even when those symlinks weren't followed.
Fix this by allowing lstat(2) and readlink(2) to succeed even when the
client can't resolve the symlink target, restoring old behavior.
Cc: linux-cifs@vger.kernel.org
Cc: stable@vger.kernel.org
Reported-by: Remy Monsen <monsen@monsen.cc>
Closes: https://lore.kernel.org/r/CAN+tdP7y=jqw3pBndZAGjQv0ObFq8Q=+PUDHgB36HdEz9QA6FQ@mail.gmail.com
Reported-by: Pierguido Lambri <plambri@redhat.com>
Fixes: 12b466eb52d9 ("cifs: Fix creating and resolving absolute NT-style symlinks")
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
- Multichannel channel allocation fix for Kerberos mounts
- Two reconnect fixes
- Fix netfs_writepages crash with smbdirect/RDMA
- Directory caching fix
- Three minor cleanup fixes
- Log error when close cached dirs fails
* tag 'v6.16-rc2-smb3-client-fixes-v2' of git://git.samba.org/sfrench/cifs-2.6:
smb: minor fix to use SMB2_NTLMV2_SESSKEY_SIZE for auth_key size
smb: minor fix to use sizeof to initialize flags_string buffer
smb: Use loff_t for directory position in cached_dirents
smb: Log an error when close_all_cached_dirs fails
cifs: Fix prepare_write to negotiate wsize if needed
smb: client: fix max_sge overflow in smb_extract_folioq_to_rdma()
smb: client: fix first command failure during re-negotiation
cifs: Remove duplicate fattr->cf_dtype assignment from wsl_to_fattr() function
smb: fix secondary channel creation issue with kerberos by populating hostname when adding channels
|
|
Replaced hardcoded value 16 with SMB2_NTLMV2_SESSKEY_SIZE
in the auth_key definition and memcpy call.
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Replaced hardcoded length with sizeof(flags_string).
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Change the pos field in struct cached_dirents from int to loff_t
to support large directory offsets. This avoids overflow and
matches kernel conventions for directory positions.
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Under low-memory conditions, close_all_cached_dirs() can't move the
dentries to a separate list to dput() them once the locks are dropped.
This will result in a "Dentry still in use" error, so add an error
message that makes it clear this is what happened:
[ 495.281119] CIFS: VFS: \\otters.example.com\share Out of memory while dropping dentries
[ 495.281595] ------------[ cut here ]------------
[ 495.281887] BUG: Dentry ffff888115531138{i=78,n=/} still in use (2) [unmount of cifs cifs]
[ 495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0
Also, bail out of looping through all tcons as soon as a single
allocation fails, since we're already in trouble, and kmalloc() attempts
for subseqeuent tcons are likely to fail just like the first one did.
Signed-off-by: Paul Aurich <paul@darkrain42.org>
Acked-by: Bharath SM <bharathsm@microsoft.com>
Suggested-by: Ruben Devos <rdevos@oxya.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Fix cifs_prepare_write() to negotiate the wsize if it is unset.
Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com>
Reviewed-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Paulo Alcantara <pc@manguebit.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
This fixes the following problem:
[ 749.901015] [ T8673] run fstests cifs/001 at 2025-06-17 09:40:30
[ 750.346409] [ T9870] ==================================================================
[ 750.346814] [ T9870] BUG: KASAN: slab-out-of-bounds in smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.347330] [ T9870] Write of size 8 at addr ffff888011082890 by task xfs_io/9870
[ 750.347705] [ T9870]
[ 750.348077] [ T9870] CPU: 0 UID: 0 PID: 9870 Comm: xfs_io Kdump: loaded Not tainted 6.16.0-rc2-metze.02+ #1 PREEMPT(voluntary)
[ 750.348082] [ T9870] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 750.348085] [ T9870] Call Trace:
[ 750.348086] [ T9870] <TASK>
[ 750.348088] [ T9870] dump_stack_lvl+0x76/0xa0
[ 750.348106] [ T9870] print_report+0xd1/0x640
[ 750.348116] [ T9870] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 750.348120] [ T9870] ? kasan_complete_mode_report_info+0x26/0x210
[ 750.348124] [ T9870] kasan_report+0xe7/0x130
[ 750.348128] [ T9870] ? smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.348262] [ T9870] ? smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.348377] [ T9870] __asan_report_store8_noabort+0x17/0x30
[ 750.348381] [ T9870] smb_set_sge+0x2cc/0x3b0 [cifs]
[ 750.348496] [ T9870] smbd_post_send_iter+0x1990/0x3070 [cifs]
[ 750.348625] [ T9870] ? __pfx_smbd_post_send_iter+0x10/0x10 [cifs]
[ 750.348741] [ T9870] ? update_stack_state+0x2a0/0x670
[ 750.348749] [ T9870] ? cifs_flush+0x153/0x320 [cifs]
[ 750.348870] [ T9870] ? cifs_flush+0x153/0x320 [cifs]
[ 750.348990] [ T9870] ? update_stack_state+0x2a0/0x670
[ 750.348995] [ T9870] smbd_send+0x58c/0x9c0 [cifs]
[ 750.349117] [ T9870] ? __pfx_smbd_send+0x10/0x10 [cifs]
[ 750.349231] [ T9870] ? unwind_get_return_address+0x65/0xb0
[ 750.349235] [ T9870] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 750.349242] [ T9870] ? arch_stack_walk+0xa7/0x100
[ 750.349250] [ T9870] ? stack_trace_save+0x92/0xd0
[ 750.349254] [ T9870] __smb_send_rqst+0x931/0xec0 [cifs]
[ 750.349374] [ T9870] ? kernel_text_address+0x173/0x190
[ 750.349379] [ T9870] ? kasan_save_stack+0x39/0x70
[ 750.349382] [ T9870] ? kasan_save_track+0x18/0x70
[ 750.349385] [ T9870] ? __kasan_slab_alloc+0x9d/0xa0
[ 750.349389] [ T9870] ? __pfx___smb_send_rqst+0x10/0x10 [cifs]
[ 750.349508] [ T9870] ? smb2_mid_entry_alloc+0xb4/0x7e0 [cifs]
[ 750.349626] [ T9870] ? cifs_call_async+0x277/0xb00 [cifs]
[ 750.349746] [ T9870] ? cifs_issue_write+0x256/0x610 [cifs]
[ 750.349867] [ T9870] ? netfs_do_issue_write+0xc2/0x340 [netfs]
[ 750.349900] [ T9870] ? netfs_advance_write+0x45b/0x1270 [netfs]
[ 750.349929] [ T9870] ? netfs_write_folio+0xd6c/0x1be0 [netfs]
[ 750.349958] [ T9870] ? netfs_writepages+0x2e9/0xa80 [netfs]
[ 750.349987] [ T9870] ? do_writepages+0x21f/0x590
[ 750.349993] [ T9870] ? filemap_fdatawrite_wbc+0xe1/0x140
[ 750.349997] [ T9870] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.350002] [ T9870] smb_send_rqst+0x22e/0x2f0 [cifs]
[ 750.350131] [ T9870] ? __pfx_smb_send_rqst+0x10/0x10 [cifs]
[ 750.350255] [ T9870] ? local_clock_noinstr+0xe/0xd0
[ 750.350261] [ T9870] ? kasan_save_alloc_info+0x37/0x60
[ 750.350268] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.350271] [ T9870] ? _raw_spin_lock+0x81/0xf0
[ 750.350275] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10
[ 750.350278] [ T9870] ? smb2_setup_async_request+0x293/0x580 [cifs]
[ 750.350398] [ T9870] cifs_call_async+0x477/0xb00 [cifs]
[ 750.350518] [ T9870] ? __pfx_smb2_writev_callback+0x10/0x10 [cifs]
[ 750.350636] [ T9870] ? __pfx_cifs_call_async+0x10/0x10 [cifs]
[ 750.350756] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10
[ 750.350760] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.350763] [ T9870] ? __smb2_plain_req_init+0x933/0x1090 [cifs]
[ 750.350891] [ T9870] smb2_async_writev+0x15ff/0x2460 [cifs]
[ 750.351008] [ T9870] ? sched_clock_noinstr+0x9/0x10
[ 750.351012] [ T9870] ? local_clock_noinstr+0xe/0xd0
[ 750.351018] [ T9870] ? __pfx_smb2_async_writev+0x10/0x10 [cifs]
[ 750.351144] [ T9870] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 750.351150] [ T9870] ? _raw_spin_unlock+0xe/0x40
[ 750.351154] [ T9870] ? cifs_pick_channel+0x242/0x370 [cifs]
[ 750.351275] [ T9870] cifs_issue_write+0x256/0x610 [cifs]
[ 750.351554] [ T9870] ? cifs_issue_write+0x256/0x610 [cifs]
[ 750.351677] [ T9870] netfs_do_issue_write+0xc2/0x340 [netfs]
[ 750.351710] [ T9870] netfs_advance_write+0x45b/0x1270 [netfs]
[ 750.351740] [ T9870] ? rolling_buffer_append+0x12d/0x440 [netfs]
[ 750.351769] [ T9870] netfs_write_folio+0xd6c/0x1be0 [netfs]
[ 750.351798] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.351804] [ T9870] netfs_writepages+0x2e9/0xa80 [netfs]
[ 750.351835] [ T9870] ? __pfx_netfs_writepages+0x10/0x10 [netfs]
[ 750.351864] [ T9870] ? exit_files+0xab/0xe0
[ 750.351867] [ T9870] ? do_exit+0x148f/0x2980
[ 750.351871] [ T9870] ? do_group_exit+0xb5/0x250
[ 750.351874] [ T9870] ? arch_do_signal_or_restart+0x92/0x630
[ 750.351879] [ T9870] ? exit_to_user_mode_loop+0x98/0x170
[ 750.351882] [ T9870] ? do_syscall_64+0x2cf/0xd80
[ 750.351886] [ T9870] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.351890] [ T9870] do_writepages+0x21f/0x590
[ 750.351894] [ T9870] ? __pfx_do_writepages+0x10/0x10
[ 750.351897] [ T9870] filemap_fdatawrite_wbc+0xe1/0x140
[ 750.351901] [ T9870] __filemap_fdatawrite_range+0xba/0x100
[ 750.351904] [ T9870] ? __pfx___filemap_fdatawrite_range+0x10/0x10
[ 750.351912] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.351916] [ T9870] filemap_write_and_wait_range+0x7d/0xf0
[ 750.351920] [ T9870] cifs_flush+0x153/0x320 [cifs]
[ 750.352042] [ T9870] filp_flush+0x107/0x1a0
[ 750.352046] [ T9870] filp_close+0x14/0x30
[ 750.352049] [ T9870] put_files_struct.part.0+0x126/0x2a0
[ 750.352053] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10
[ 750.352058] [ T9870] exit_files+0xab/0xe0
[ 750.352061] [ T9870] do_exit+0x148f/0x2980
[ 750.352065] [ T9870] ? __pfx_do_exit+0x10/0x10
[ 750.352069] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.352072] [ T9870] ? _raw_spin_lock_irq+0x8a/0xf0
[ 750.352076] [ T9870] do_group_exit+0xb5/0x250
[ 750.352080] [ T9870] get_signal+0x22d3/0x22e0
[ 750.352086] [ T9870] ? __pfx_get_signal+0x10/0x10
[ 750.352089] [ T9870] ? fpregs_assert_state_consistent+0x68/0x100
[ 750.352101] [ T9870] ? folio_add_lru+0xda/0x120
[ 750.352105] [ T9870] arch_do_signal_or_restart+0x92/0x630
[ 750.352109] [ T9870] ? __pfx_arch_do_signal_or_restart+0x10/0x10
[ 750.352115] [ T9870] exit_to_user_mode_loop+0x98/0x170
[ 750.352118] [ T9870] do_syscall_64+0x2cf/0xd80
[ 750.352123] [ T9870] ? __kasan_check_read+0x11/0x20
[ 750.352126] [ T9870] ? count_memcg_events+0x1b4/0x420
[ 750.352132] [ T9870] ? handle_mm_fault+0x148/0x690
[ 750.352136] [ T9870] ? _raw_spin_lock_irq+0x8a/0xf0
[ 750.352140] [ T9870] ? __kasan_check_read+0x11/0x20
[ 750.352143] [ T9870] ? fpregs_assert_state_consistent+0x68/0x100
[ 750.352146] [ T9870] ? irqentry_exit_to_user_mode+0x2e/0x250
[ 750.352151] [ T9870] ? irqentry_exit+0x43/0x50
[ 750.352154] [ T9870] ? exc_page_fault+0x75/0xe0
[ 750.352160] [ T9870] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.352163] [ T9870] RIP: 0033:0x7858c94ab6e2
[ 750.352167] [ T9870] Code: Unable to access opcode bytes at 0x7858c94ab6b8.
[ 750.352175] [ T9870] RSP: 002b:00007858c9248ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000022
[ 750.352179] [ T9870] RAX: fffffffffffffdfe RBX: 00007858c92496c0 RCX: 00007858c94ab6e2
[ 750.352182] [ T9870] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 750.352184] [ T9870] RBP: 00007858c9248d10 R08: 0000000000000000 R09: 0000000000000000
[ 750.352185] [ T9870] R10: 0000000000000000 R11: 0000000000000246 R12: fffffffffffffde0
[ 750.352187] [ T9870] R13: 0000000000000020 R14: 0000000000000002 R15: 00007ffc072d2230
[ 750.352191] [ T9870] </TASK>
[ 750.352195] [ T9870]
[ 750.395206] [ T9870] Allocated by task 9870 on cpu 0 at 750.346406s:
[ 750.395523] [ T9870] kasan_save_stack+0x39/0x70
[ 750.395532] [ T9870] kasan_save_track+0x18/0x70
[ 750.395536] [ T9870] kasan_save_alloc_info+0x37/0x60
[ 750.395539] [ T9870] __kasan_slab_alloc+0x9d/0xa0
[ 750.395543] [ T9870] kmem_cache_alloc_noprof+0x13c/0x3f0
[ 750.395548] [ T9870] mempool_alloc_slab+0x15/0x20
[ 750.395553] [ T9870] mempool_alloc_noprof+0x135/0x340
[ 750.395557] [ T9870] smbd_post_send_iter+0x63e/0x3070 [cifs]
[ 750.395694] [ T9870] smbd_send+0x58c/0x9c0 [cifs]
[ 750.395819] [ T9870] __smb_send_rqst+0x931/0xec0 [cifs]
[ 750.395950] [ T9870] smb_send_rqst+0x22e/0x2f0 [cifs]
[ 750.396081] [ T9870] cifs_call_async+0x477/0xb00 [cifs]
[ 750.396232] [ T9870] smb2_async_writev+0x15ff/0x2460 [cifs]
[ 750.396359] [ T9870] cifs_issue_write+0x256/0x610 [cifs]
[ 750.396492] [ T9870] netfs_do_issue_write+0xc2/0x340 [netfs]
[ 750.396544] [ T9870] netfs_advance_write+0x45b/0x1270 [netfs]
[ 750.396576] [ T9870] netfs_write_folio+0xd6c/0x1be0 [netfs]
[ 750.396608] [ T9870] netfs_writepages+0x2e9/0xa80 [netfs]
[ 750.396639] [ T9870] do_writepages+0x21f/0x590
[ 750.396643] [ T9870] filemap_fdatawrite_wbc+0xe1/0x140
[ 750.396647] [ T9870] __filemap_fdatawrite_range+0xba/0x100
[ 750.396651] [ T9870] filemap_write_and_wait_range+0x7d/0xf0
[ 750.396656] [ T9870] cifs_flush+0x153/0x320 [cifs]
[ 750.396787] [ T9870] filp_flush+0x107/0x1a0
[ 750.396791] [ T9870] filp_close+0x14/0x30
[ 750.396795] [ T9870] put_files_struct.part.0+0x126/0x2a0
[ 750.396800] [ T9870] exit_files+0xab/0xe0
[ 750.396803] [ T9870] do_exit+0x148f/0x2980
[ 750.396808] [ T9870] do_group_exit+0xb5/0x250
[ 750.396813] [ T9870] get_signal+0x22d3/0x22e0
[ 750.396817] [ T9870] arch_do_signal_or_restart+0x92/0x630
[ 750.396822] [ T9870] exit_to_user_mode_loop+0x98/0x170
[ 750.396827] [ T9870] do_syscall_64+0x2cf/0xd80
[ 750.396832] [ T9870] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.396836] [ T9870]
[ 750.397150] [ T9870] The buggy address belongs to the object at ffff888011082800
which belongs to the cache smbd_request_0000000008f3bd7b of size 144
[ 750.397798] [ T9870] The buggy address is located 0 bytes to the right of
allocated 144-byte region [ffff888011082800, ffff888011082890)
[ 750.398469] [ T9870]
[ 750.398800] [ T9870] The buggy address belongs to the physical page:
[ 750.399141] [ T9870] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11082
[ 750.399148] [ T9870] flags: 0xfffffc0000000(node=0|zone=1|lastcpupid=0x1fffff)
[ 750.399155] [ T9870] page_type: f5(slab)
[ 750.399161] [ T9870] raw: 000fffffc0000000 ffff888022d65640 dead000000000122 0000000000000000
[ 750.399165] [ T9870] raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
[ 750.399169] [ T9870] page dumped because: kasan: bad access detected
[ 750.399172] [ T9870]
[ 750.399505] [ T9870] Memory state around the buggy address:
[ 750.399863] [ T9870] ffff888011082780: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 750.400247] [ T9870] ffff888011082800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 750.400618] [ T9870] >ffff888011082880: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 750.400982] [ T9870] ^
[ 750.401370] [ T9870] ffff888011082900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 750.401774] [ T9870] ffff888011082980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 750.402171] [ T9870] ==================================================================
[ 750.402696] [ T9870] Disabling lock debugging due to kernel taint
[ 750.403202] [ T9870] BUG: unable to handle page fault for address: ffff8880110a2000
[ 750.403797] [ T9870] #PF: supervisor write access in kernel mode
[ 750.404204] [ T9870] #PF: error_code(0x0003) - permissions violation
[ 750.404581] [ T9870] PGD 5ce01067 P4D 5ce01067 PUD 5ce02067 PMD 78aa063 PTE 80000000110a2021
[ 750.404969] [ T9870] Oops: Oops: 0003 [#1] SMP KASAN PTI
[ 750.405394] [ T9870] CPU: 0 UID: 0 PID: 9870 Comm: xfs_io Kdump: loaded Tainted: G B 6.16.0-rc2-metze.02+ #1 PREEMPT(voluntary)
[ 750.406510] [ T9870] Tainted: [B]=BAD_PAGE
[ 750.406967] [ T9870] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[ 750.407440] [ T9870] RIP: 0010:smb_set_sge+0x15c/0x3b0 [cifs]
[ 750.408065] [ T9870] Code: 48 83 f8 ff 0f 84 b0 00 00 00 48 ba 00 00 00 00 00 fc ff df 4c 89 e1 48 c1 e9 03 80 3c 11 00 0f 85 69 01 00 00 49 8d 7c 24 08 <49> 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f
[ 750.409283] [ T9870] RSP: 0018:ffffc90005e2e758 EFLAGS: 00010246
[ 750.409803] [ T9870] RAX: ffff888036c53400 RBX: ffffc90005e2e878 RCX: 1ffff11002214400
[ 750.410323] [ T9870] RDX: dffffc0000000000 RSI: dffffc0000000000 RDI: ffff8880110a2008
[ 750.411217] [ T9870] RBP: ffffc90005e2e798 R08: 0000000000000001 R09: 0000000000000400
[ 750.411770] [ T9870] R10: ffff888011082800 R11: 0000000000000000 R12: ffff8880110a2000
[ 750.412325] [ T9870] R13: 0000000000000000 R14: ffffc90005e2e888 R15: ffff88801a4b6000
[ 750.412901] [ T9870] FS: 0000000000000000(0000) GS:ffff88812bc68000(0000) knlGS:0000000000000000
[ 750.413477] [ T9870] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 750.414077] [ T9870] CR2: ffff8880110a2000 CR3: 000000005b0a6005 CR4: 00000000000726f0
[ 750.414654] [ T9870] Call Trace:
[ 750.415211] [ T9870] <TASK>
[ 750.415748] [ T9870] smbd_post_send_iter+0x1990/0x3070 [cifs]
[ 750.416449] [ T9870] ? __pfx_smbd_post_send_iter+0x10/0x10 [cifs]
[ 750.417128] [ T9870] ? update_stack_state+0x2a0/0x670
[ 750.417685] [ T9870] ? cifs_flush+0x153/0x320 [cifs]
[ 750.418380] [ T9870] ? cifs_flush+0x153/0x320 [cifs]
[ 750.419055] [ T9870] ? update_stack_state+0x2a0/0x670
[ 750.419624] [ T9870] smbd_send+0x58c/0x9c0 [cifs]
[ 750.420297] [ T9870] ? __pfx_smbd_send+0x10/0x10 [cifs]
[ 750.420936] [ T9870] ? unwind_get_return_address+0x65/0xb0
[ 750.421456] [ T9870] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 750.421954] [ T9870] ? arch_stack_walk+0xa7/0x100
[ 750.422460] [ T9870] ? stack_trace_save+0x92/0xd0
[ 750.422948] [ T9870] __smb_send_rqst+0x931/0xec0 [cifs]
[ 750.423579] [ T9870] ? kernel_text_address+0x173/0x190
[ 750.424056] [ T9870] ? kasan_save_stack+0x39/0x70
[ 750.424813] [ T9870] ? kasan_save_track+0x18/0x70
[ 750.425323] [ T9870] ? __kasan_slab_alloc+0x9d/0xa0
[ 750.425831] [ T9870] ? __pfx___smb_send_rqst+0x10/0x10 [cifs]
[ 750.426548] [ T9870] ? smb2_mid_entry_alloc+0xb4/0x7e0 [cifs]
[ 750.427231] [ T9870] ? cifs_call_async+0x277/0xb00 [cifs]
[ 750.427882] [ T9870] ? cifs_issue_write+0x256/0x610 [cifs]
[ 750.428909] [ T9870] ? netfs_do_issue_write+0xc2/0x340 [netfs]
[ 750.429425] [ T9870] ? netfs_advance_write+0x45b/0x1270 [netfs]
[ 750.429882] [ T9870] ? netfs_write_folio+0xd6c/0x1be0 [netfs]
[ 750.430345] [ T9870] ? netfs_writepages+0x2e9/0xa80 [netfs]
[ 750.430809] [ T9870] ? do_writepages+0x21f/0x590
[ 750.431239] [ T9870] ? filemap_fdatawrite_wbc+0xe1/0x140
[ 750.431652] [ T9870] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.432041] [ T9870] smb_send_rqst+0x22e/0x2f0 [cifs]
[ 750.432586] [ T9870] ? __pfx_smb_send_rqst+0x10/0x10 [cifs]
[ 750.433108] [ T9870] ? local_clock_noinstr+0xe/0xd0
[ 750.433482] [ T9870] ? kasan_save_alloc_info+0x37/0x60
[ 750.433855] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.434214] [ T9870] ? _raw_spin_lock+0x81/0xf0
[ 750.434561] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10
[ 750.434903] [ T9870] ? smb2_setup_async_request+0x293/0x580 [cifs]
[ 750.435394] [ T9870] cifs_call_async+0x477/0xb00 [cifs]
[ 750.435892] [ T9870] ? __pfx_smb2_writev_callback+0x10/0x10 [cifs]
[ 750.436388] [ T9870] ? __pfx_cifs_call_async+0x10/0x10 [cifs]
[ 750.436881] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10
[ 750.437237] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.437579] [ T9870] ? __smb2_plain_req_init+0x933/0x1090 [cifs]
[ 750.438062] [ T9870] smb2_async_writev+0x15ff/0x2460 [cifs]
[ 750.438557] [ T9870] ? sched_clock_noinstr+0x9/0x10
[ 750.438906] [ T9870] ? local_clock_noinstr+0xe/0xd0
[ 750.439293] [ T9870] ? __pfx_smb2_async_writev+0x10/0x10 [cifs]
[ 750.439786] [ T9870] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 750.440143] [ T9870] ? _raw_spin_unlock+0xe/0x40
[ 750.440495] [ T9870] ? cifs_pick_channel+0x242/0x370 [cifs]
[ 750.440989] [ T9870] cifs_issue_write+0x256/0x610 [cifs]
[ 750.441492] [ T9870] ? cifs_issue_write+0x256/0x610 [cifs]
[ 750.441987] [ T9870] netfs_do_issue_write+0xc2/0x340 [netfs]
[ 750.442387] [ T9870] netfs_advance_write+0x45b/0x1270 [netfs]
[ 750.442969] [ T9870] ? rolling_buffer_append+0x12d/0x440 [netfs]
[ 750.443376] [ T9870] netfs_write_folio+0xd6c/0x1be0 [netfs]
[ 750.443768] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.444145] [ T9870] netfs_writepages+0x2e9/0xa80 [netfs]
[ 750.444541] [ T9870] ? __pfx_netfs_writepages+0x10/0x10 [netfs]
[ 750.444936] [ T9870] ? exit_files+0xab/0xe0
[ 750.445312] [ T9870] ? do_exit+0x148f/0x2980
[ 750.445672] [ T9870] ? do_group_exit+0xb5/0x250
[ 750.446028] [ T9870] ? arch_do_signal_or_restart+0x92/0x630
[ 750.446402] [ T9870] ? exit_to_user_mode_loop+0x98/0x170
[ 750.446762] [ T9870] ? do_syscall_64+0x2cf/0xd80
[ 750.447132] [ T9870] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.447499] [ T9870] do_writepages+0x21f/0x590
[ 750.447859] [ T9870] ? __pfx_do_writepages+0x10/0x10
[ 750.448236] [ T9870] filemap_fdatawrite_wbc+0xe1/0x140
[ 750.448595] [ T9870] __filemap_fdatawrite_range+0xba/0x100
[ 750.448953] [ T9870] ? __pfx___filemap_fdatawrite_range+0x10/0x10
[ 750.449336] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.449697] [ T9870] filemap_write_and_wait_range+0x7d/0xf0
[ 750.450062] [ T9870] cifs_flush+0x153/0x320 [cifs]
[ 750.450592] [ T9870] filp_flush+0x107/0x1a0
[ 750.450952] [ T9870] filp_close+0x14/0x30
[ 750.451322] [ T9870] put_files_struct.part.0+0x126/0x2a0
[ 750.451678] [ T9870] ? __pfx__raw_spin_lock+0x10/0x10
[ 750.452033] [ T9870] exit_files+0xab/0xe0
[ 750.452401] [ T9870] do_exit+0x148f/0x2980
[ 750.452751] [ T9870] ? __pfx_do_exit+0x10/0x10
[ 750.453109] [ T9870] ? __kasan_check_write+0x14/0x30
[ 750.453459] [ T9870] ? _raw_spin_lock_irq+0x8a/0xf0
[ 750.453787] [ T9870] do_group_exit+0xb5/0x250
[ 750.454082] [ T9870] get_signal+0x22d3/0x22e0
[ 750.454406] [ T9870] ? __pfx_get_signal+0x10/0x10
[ 750.454709] [ T9870] ? fpregs_assert_state_consistent+0x68/0x100
[ 750.455031] [ T9870] ? folio_add_lru+0xda/0x120
[ 750.455347] [ T9870] arch_do_signal_or_restart+0x92/0x630
[ 750.455656] [ T9870] ? __pfx_arch_do_signal_or_restart+0x10/0x10
[ 750.455967] [ T9870] exit_to_user_mode_loop+0x98/0x170
[ 750.456282] [ T9870] do_syscall_64+0x2cf/0xd80
[ 750.456591] [ T9870] ? __kasan_check_read+0x11/0x20
[ 750.456897] [ T9870] ? count_memcg_events+0x1b4/0x420
[ 750.457280] [ T9870] ? handle_mm_fault+0x148/0x690
[ 750.457616] [ T9870] ? _raw_spin_lock_irq+0x8a/0xf0
[ 750.457925] [ T9870] ? __kasan_check_read+0x11/0x20
[ 750.458297] [ T9870] ? fpregs_assert_state_consistent+0x68/0x100
[ 750.458672] [ T9870] ? irqentry_exit_to_user_mode+0x2e/0x250
[ 750.459191] [ T9870] ? irqentry_exit+0x43/0x50
[ 750.459600] [ T9870] ? exc_page_fault+0x75/0xe0
[ 750.460130] [ T9870] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 750.460570] [ T9870] RIP: 0033:0x7858c94ab6e2
[ 750.461206] [ T9870] Code: Unable to access opcode bytes at 0x7858c94ab6b8.
[ 750.461780] [ T9870] RSP: 002b:00007858c9248ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000022
[ 750.462327] [ T9870] RAX: fffffffffffffdfe RBX: 00007858c92496c0 RCX: 00007858c94ab6e2
[ 750.462653] [ T9870] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 750.462969] [ T9870] RBP: 00007858c9248d10 R08: 0000000000000000 R09: 0000000000000000
[ 750.463290] [ T9870] R10: 0000000000000000 R11: 0000000000000246 R12: fffffffffffffde0
[ 750.463640] [ T9870] R13: 0000000000000020 R14: 0000000000000002 R15: 00007ffc072d2230
[ 750.463965] [ T9870] </TASK>
[ 750.464285] [ T9870] Modules linked in: siw ib_uverbs ccm cmac nls_utf8 cifs cifs_arc4 nls_ucs2_utils rdma_cm iw_cm ib_cm ib_core cifs_md4 netfs softdog vboxsf vboxguest cpuid intel_rapl_msr intel_rapl_common intel_uncore_frequency_common intel_pmc_core pmt_telemetry pmt_class intel_pmc_ssram_telemetry intel_vsec polyval_clmulni ghash_clmulni_intel sha1_ssse3 aesni_intel rapl i2c_piix4 i2c_smbus joydev input_leds mac_hid sunrpc binfmt_misc kvm_intel kvm irqbypass sch_fq_codel efi_pstore nfnetlink vsock_loopback vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock vmw_vmci dmi_sysfs ip_tables x_tables autofs4 hid_generic vboxvideo usbhid drm_vram_helper psmouse vga16fb vgastate drm_ttm_helper serio_raw hid ahci libahci ttm pata_acpi video wmi [last unloaded: vboxguest]
[ 750.467127] [ T9870] CR2: ffff8880110a2000
cc: Tom Talpey <tom@talpey.com>
cc: linux-cifs@vger.kernel.org
Reviewed-by: David Howells <dhowells@redhat.com>
Reviewed-by: Tom Talpey <tom@talpey.com>
Fixes: c45ebd636c32 ("cifs: Provide the capability to extract from ITER_FOLIOQ to RDMA SGEs")
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
after fabc4ed200f9, server_unresponsive add a condition to check whether client
need to reconnect depending on server->lstrp. When client failed to reconnect
for some time and abort connection, server->lstrp is updated for the last time.
In the following scene, server->lstrp is too old. This cause next command
failure in re-negotiation rather than waiting for re-negotiation done.
1. mount -t cifs -o username=Everyone,echo_internal=10 //$server_ip/export /mnt
2. ssh $server_ip "echo b > /proc/sysrq-trigger &"
3. ls /mnt
4. sleep 21s
5. ssh $server_ip "service firewalld stop"
6. ls # return EHOSTDOWN
If the interval between 5 and 6 is too small, 6 may trigger sending negotiation
request. Before backgrounding cifsd thread try to receive negotiation response
from server in cifs_readv_from_socket, server_unresponsive may trigger
cifs_reconnect which cause 6 to be failed:
ls thread
----------------
smb2_negotiate
server->tcpStatus = CifsInNegotiate
compound_send_recv
wait_for_compound_request
cifsd thread
----------------
cifs_readv_from_socket
server_unresponsive
server->tcpStatus == CifsInNegotiate && jiffies > server->lstrp + 20s
cifs_reconnect
cifs_abort_connection: mid_state = MID_RETRY_NEEDED
ls thread
----------------
cifs_sync_mid_result return EAGAIN
smb2_negotiate return EHOSTDOWN
Though server->lstrp means last server response time, it is updated in
cifs_abort_connection and cifs_get_tcp_session. We can also update server->lstrp
before switching into CifsInNegotiate state to avoid failure in 6.
Fixes: 7ccc1465465d ("smb: client: fix hang in wait_for_response() for negproto")
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Acked-by: Meetakshi Setiya <msetiya@microsoft.com>
Signed-off-by: zhangjian <zhangjian496@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Commit 8bd25b61c5a5 ("smb: client: set correct d_type for reparse DFS/DFSR
and mount point") deduplicated assignment of fattr->cf_dtype member from
all places to end of the function cifs_reparse_point_to_fattr(). The only
one missing place which was not deduplicated is wsl_to_fattr(). Fix it.
Fixes: 8bd25b61c5a5 ("smb: client: set correct d_type for reparse DFS/DFSR and mount point")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
hostname when adding channels
When mounting a share with kerberos authentication with multichannel
support, share mounts correctly, but fails to create secondary
channels. This occurs because the hostname is not populated when
adding the channels. The hostname is necessary for the userspace
cifs.upcall program to retrieve the required credentials and pass
it back to kernel, without hostname secondary channels fails
establish.
Cc: stable@vger.kernel.org
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Reported-by: xfuren <xfuren@gmail.com>
Link: https://bugzilla.samba.org/show_bug.cgi?id=15824
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
The bug only appears when:
- windows 11 copies a file that has an alternate data stream
- streams_xattr is enabled on the share configuration.
Microsoft Edge adds a ZoneIdentifier data stream containing the URL
for files it downloads.
Another way to create a test file:
- open cmd.exe
- echo "hello from default data stream" > hello.txt
- echo "hello again from ads" > hello.txt:ads.txt
If you open the file using notepad, we'll see the first message.
If you run "notepad hello.txt:ads.txt" in cmd.exe, we should see
the second message.
dir /s /r should least all streams for the file.
The truncation happens because the windows 11 client sends
a SetInfo/EndOfFile message on the ADS, but it is instead applied
on the main file, because we don't check fp->stream.
When receiving set/get info file for a stream file, Change to process
requests using stream position and size.
Truncate is unnecessary for stream files, so we skip
set_file_allocation_info and set_end_of_file_info operations.
Reported-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
If client set ->PreviousSessionId on kerberos session setup stage,
NULL pointer dereference error will happen. Since sess->user is not
set yet, It can pass the user argument as NULL to destroy_previous_session.
sess->user will be set in ksmbd_krb5_authenticate(). So this patch move
calling destroy_previous_session() after ksmbd_krb5_authenticate().
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-27391
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
free_transport function for tcp connection can be called from smbdirect.
It will cause kernel oops. This patch add free_transport ops in ksmbd
connection, and add each free_transports for tcp and smbdirect.
Fixes: 21a4e47578d4 ("ksmbd: fix use-after-free in __smb2_lease_break_noti()")
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Currently, cached directory contents were not reused across subsequent
'ls' operations because the cache validity check relied on comparing
the ctx pointer, which changes with each readdir invocation. As a
result, the cached dir entries was not marked as valid and the cache was
not utilized for subsequent 'ls' operations.
This change uses the file pointer, which remains consistent across all
readdir calls for a given directory instance, to associate and validate
the cache. As a result, cached directory contents can now be
correctly reused, improving performance for repeated directory listings.
Performance gains with local windows SMB server:
Without the patch and default actimeo=1:
1000 directory enumeration operations on dir with 10k files took 135.0s
With this patch and actimeo=0:
1000 directory enumeration operations on dir with 10k files took just 5.1s
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Customer reported that one of their applications started failing to
open files with STATUS_INSUFFICIENT_RESOURCES due to NetApp server
hitting the maximum number of opens to same file that it would allow
for a single client connection.
It turned out the client was failing to reuse open handles with
deferred closes because matching ->f_flags directly without masking
off O_CREAT|O_EXCL|O_TRUNC bits first broke the comparision and then
client ended up with thousands of deferred closes to same file. Those
bits are already satisfied on the original open, so no need to check
them against existing open handles.
Reproducer:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#define NR_THREADS 4
#define NR_ITERATIONS 2500
#define TEST_FILE "/mnt/1/test/dir/foo"
static char buf[64];
static void *worker(void *arg)
{
int i, j;
int fd;
for (i = 0; i < NR_ITERATIONS; i++) {
fd = open(TEST_FILE, O_WRONLY|O_CREAT|O_APPEND, 0666);
for (j = 0; j < 16; j++)
write(fd, buf, sizeof(buf));
close(fd);
}
}
int main(int argc, char *argv[])
{
pthread_t t[NR_THREADS];
int fd;
int i;
fd = open(TEST_FILE, O_WRONLY|O_CREAT|O_TRUNC, 0666);
close(fd);
memset(buf, 'a', sizeof(buf));
for (i = 0; i < NR_THREADS; i++)
pthread_create(&t[i], NULL, worker, NULL);
for (i = 0; i < NR_THREADS; i++)
pthread_join(t[i], NULL);
return 0;
}
Before patch:
$ mount.cifs //srv/share /mnt/1 -o ...
$ mkdir -p /mnt/1/test/dir
$ gcc repro.c && ./a.out
...
number of opens: 1391
After patch:
$ mount.cifs //srv/share /mnt/1 -o ...
$ mkdir -p /mnt/1/test/dir
$ gcc repro.c && ./a.out
...
number of opens: 1
Cc: linux-cifs@vger.kernel.org
Cc: David Howells <dhowells@redhat.com>
Cc: Jay Shin <jaeshin@redhat.com>
Cc: Pierguido Lambri <plambri@redhat.com>
Fixes: b8ea3b1ff544 ("smb: enable reuse of deferred file handles for write operations")
Acked-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
If SMB 3.1.1 POSIX Extensions are available and negotiated, the client
should be able to use all characters and not remap anything. Currently, the
user has to explicitly request this behavior by specifying the "nomapposix"
mount option.
Link: https://lore.kernel.org/4195bb677b33d680e77549890a4f4dd3b474ceaf.camel@rx2.rx-server.de
Signed-off-by: Philipp Kerling <pkerling@casix.org>
Reviewed-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
git://git.samba.org/sfrench/cifs-2.6
Pull more smb client updates from Steve French:
- multichannel/reconnect fixes
- move smbdirect (smb over RDMA) defines to fs/smb/common so they will
be able to be used in the future more broadly, and a documentation
update explaining setting up smbdirect mounts
- update email address for Paulo
* tag '6.16-rc-part2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update internal version number
MAINTAINERS, mailmap: Update Paulo Alcantara's email address
cifs: add documentation for smbdirect setup
cifs: do not disable interface polling on failure
cifs: serialize other channels when query server interfaces is pending
cifs: deal with the channel loading lag while picking channels
smb: client: make use of common smbdirect_socket_parameters
smb: smbdirect: introduce smbdirect_socket_parameters
smb: client: make use of common smbdirect_socket
smb: smbdirect: add smbdirect_socket.h
smb: client: make use of common smbdirect.h
smb: smbdirect: add smbdirect.h with public structures
smb: client: make use of common smbdirect_pdu.h
smb: smbdirect: add smbdirect_pdu.h with protocol definitions
|
|
to 2.55
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Pull smb server updates from Steve French:
"Four smb3 server fixes:
- Fix for special character handling when mounting with "posix"
- Fix for mounts from Mac for fs that don't provide unique inode
numbers
- Two cleanup patches (e.g. for crypto calls)"
* tag '6.16-rc-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
ksmbd: allow a filename to contain special characters on SMB3.1.1 posix extension
ksmbd: provide zero as a unique ID to the Mac client
ksmbd: remove unnecessary softdep on crc32
ksmbd: use SHA-256 library API instead of crypto_shash API
|
|
When a server has multichannel enabled, we keep polling the server
for interfaces periodically. However, when this query fails, we
disable the polling. This can be problematic as it takes away the
chance for the server to start advertizing again.
This change reschedules the delayed work, even if the current call
failed. That way, multichannel sessions can recover.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Today, during smb2_reconnect, session_mutex is released as soon as
the tcon is reconnected and is in a good state. However, in case
multichannel is enabled, there is also a query of server interfaces that
follows. We've seen that this query can race with reconnects of other
channels, causing them to step on each other with reconnects.
This change extends the hold of session_mutex till after the query of
server interfaces is complete. In order to avoid recursive smb2_reconnect
checks during query ioctl, this change also introduces a session flag
for sessions where such a query is in progress.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Our current approach to select a channel for sending requests is this:
1. iterate all channels to find the min and max queue depth
2. if min and max are not the same, pick the channel with min depth
3. if min and max are same, round robin, as all channels are equally loaded
The problem with this approach is that there's a lag between selecting
a channel and sending the request (that increases the queue depth on the channel).
While these numbers will eventually catch up, there could be a skew in the
channel usage, depending on the application's I/O parallelism and the server's
speed of handling requests.
With sufficient parallelism, this lag can artificially increase the queue depth,
thereby impacting the performance negatively.
This change will change the step 1 above to start the iteration from the last
selected channel. This is to reduce the skew in channel usage even in the presence
of this lag.
Fixes: ea90708d3cf3 ("cifs: use the least loaded channel for sending requests")
Cc: <stable@vger.kernel.org>
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
This is the next step in the direction of a common smbdirect layer.
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
This is the next step in the direction of a common smbdirect layer.
Currently only structures are shared, but that will change
over time until everything is shared.
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
This abstracts the common smbdirect layer.
Currently with just a few things in it,
but that will change over time until everything is
in common.
Will be used in client and server in the next commits
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Will be used in client and server in the next commits.
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
CC: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
This is just a start moving into a common smbdirect layer.
It will be used in the next commits...
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
git://git.samba.org/sfrench/cifs-2.6
Pull smb client updates from Steve French:
- multichannel fixes (mostly reconnect related), and clarification of
locking documentation
- automount null pointer check fix
- fixes to add support for ParentLeaseKey
- minor cleanup
- smb1/cifs fixes
* tag 'v6.16-rc-part1-smb-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update the lock ordering comments with new mutex
cifs: dns resolution is needed only for primary channel
cifs: update dstaddr whenever channel iface is updated
cifs: reset connections for all channels when reconnect requested
smb: client: use ParentLeaseKey in cifs_do_create
smb: client: use ParentLeaseKey in open_cached_dir
smb: client: add ParentLeaseKey support
cifs: Fix cifs_query_path_info() for Windows NT servers
cifs: Fix validation of SMB1 query reparse point response
cifs: Correctly set SMB1 SessionKey field in Session Setup Request
cifs: Fix encoding of SMB1 Session Setup NTLMSSP Request in non-UNICODE mode
smb: client: add NULL check in automount_fullpath
smb: client: Remove an unused function and variable
|
|
The lock ordering rules listed as comments in cifsglob.h were
missing some lock details and also the fid_lock.
Updated those notes in this commit.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull netfs updates from Christian Brauner:
- The main API document has been extensively updated/rewritten
- Fix an oops in write-retry due to mis-resetting the I/O iterator
- Fix the recording of transferred bytes for short DIO reads
- Fix a request's work item to not require a reference, thereby
avoiding the need to get rid of it in BH/IRQ context
- Fix waiting and waking to be consistent about the waitqueue used
- Remove NETFS_SREQ_SEEK_DATA_READ, NETFS_INVALID_WRITE,
NETFS_ICTX_WRITETHROUGH, NETFS_READ_HOLE_CLEAR,
NETFS_RREQ_DONT_UNLOCK_FOLIOS, and NETFS_RREQ_BLOCKED
- Reorder structs to eliminate holes
- Remove netfs_io_request::ractl
- Only provide proc_link field if CONFIG_PROC_FS=y
- Remove folio_queue::marks3
- Fix undifferentiation of DIO reads from unbuffered reads
* tag 'vfs-6.16-rc1.netfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
netfs: Fix undifferentiation of DIO reads from unbuffered reads
netfs: Fix wait/wake to be consistent about the waitqueue used
netfs: Fix the request's work item to not require a ref
netfs: Fix setting of transferred bytes with short DIO reads
netfs: Fix oops in write-retry from mis-resetting the subreq iterator
fs/netfs: remove unused flag NETFS_RREQ_BLOCKED
fs/netfs: remove unused flag NETFS_RREQ_DONT_UNLOCK_FOLIOS
folio_queue: remove unused field `marks3`
fs/netfs: declare field `proc_link` only if CONFIG_PROC_FS=y
fs/netfs: remove `netfs_io_request.ractl`
fs/netfs: reorder struct fields to eliminate holes
fs/netfs: remove unused enum choice NETFS_READ_HOLE_CLEAR
fs/netfs: remove unused flag NETFS_ICTX_WRITETHROUGH
fs/netfs: remove unused source NETFS_INVALID_WRITE
fs/netfs: remove unused flag NETFS_SREQ_SEEK_DATA_READ
|
|
When calling cifs_reconnect, before the connection to the
server is reestablished, the code today does a DNS resolution and
updates server->dstaddr.
However, this is not necessary for secondary channels. Secondary
channels use the interface list returned by the server to decide
which address to connect to. And that happens after tcon is reconnected
and server interfaces are requested.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
When the server interface info changes (more common in clustered
servers like Azure Files), the per-channel iface gets updated.
However, this did not update the corresponding dstaddr. As a result
these channels will still connect (or try connecting) to older addresses.
Fixes: b54034a73baf ("cifs: during reconnect, update interface if necessary")
Cc: <stable@vger.kernel.org>
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
cifs_reconnect can be called with a flag to mark the session as needing
reconnect too. When this is done, we expect the connections of all
channels to be reconnected too, which is not happening today.
Without doing this, we have seen bad things happen when primary and
secondary channels are connected to different servers (in case of cloud
services like Azure Files SMB).
This change would force all connections to reconnect as well, not just
the sessions and tcons.
Cc: <stable@vger.kernel.org>
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Implement ParentLeaseKey logic in cifs_do_create() by looking up the
parent cfid, copying its lease key into the fid struct, and setting
the appropriate lease flag.
Fixes: f047390a097e ("CIFS: Add create lease v2 context for SMB3")
Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Implement ParentLeaseKey logic in open_cached_dir() by looking up the
parent cfid, copying its lease key into the fid struct, and setting
the appropriate lease flag.
Fixes: f047390a097e ("CIFS: Add create lease v2 context for SMB3")
Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
According to MS-SMB2 3.2.4.3.8, when opening a file the client must
lookup its parent directory, copy that entry’s LeaseKey into
ParentLeaseKey, and set SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET.
Extend lease context functions to carry a parent_lease_key and
lease_flags and to add them to the lease context buffer accordingly in
smb3_create_lease_buf. Also add a parent_lease_key field to struct
cifs_fid and lease_flags to cifs_open_parms.
Only applies to the SMB 3.x dialect family.
Fixes: f047390a097e ("CIFS: Add create lease v2 context for SMB3")
Signed-off-by: Henrique Carvalho <henrique.carvalho@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
For TRANS2 QUERY_PATH_INFO request when the path does not exist, the
Windows NT SMB server returns error response STATUS_OBJECT_NAME_NOT_FOUND
or ERRDOS/ERRbadfile without the SMBFLG_RESPONSE flag set. Similarly it
returns STATUS_DELETE_PENDING when the file is being deleted. And looks
like that any error response from TRANS2 QUERY_PATH_INFO does not have
SMBFLG_RESPONSE flag set.
So relax check in check_smb_hdr() for detecting if the packet is response
for this special case.
This change fixes stat() operation against Windows NT SMB servers and also
all operations which depends on -ENOENT result from stat like creat() or
mkdir().
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
Validate the SMB1 query reparse point response per [MS-CIFS] section
2.2.7.2 NT_TRANSACT_IOCTL.
NT_TRANSACT_IOCTL response contains one word long setup data after which is
ByteCount member. So check that SetupCount is 1 before trying to read and
use ByteCount member.
Output setup data contains ReturnedDataLen member which is the output
length of executed IOCTL command by remote system. So check that output was
not truncated before transferring over network.
Change MaxSetupCount of NT_TRANSACT_IOCTL request from 4 to 1 as io_rsp
structure already expects one word long output setup data. This should
prevent server sending incompatible structure (in case it would be extended
in future, which is unlikely).
Change MaxParameterCount of NT_TRANSACT_IOCTL request from 2 to 0 as
NT IOCTL does not have any documented output parameters and this function
does not parse any output parameters at all.
Fixes: ed3e0a149b58 ("smb: client: implement ->query_reparse_point() for SMB1")
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
[MS-CIFS] specification in section 2.2.4.53.1 where is described
SMB_COM_SESSION_SETUP_ANDX Request, for SessionKey field says:
The client MUST set this field to be equal to the SessionKey field in
the SMB_COM_NEGOTIATE Response for this SMB connection.
Linux SMB client currently set this field to zero. This is working fine
against Windows NT SMB servers thanks to [MS-CIFS] product behavior <94>:
Windows NT Server ignores the client's SessionKey.
For compatibility with [MS-CIFS], set this SessionKey field in Session
Setup Request to value retrieved from Negotiate response.
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
SMB1 Session Setup NTLMSSP Request in non-UNICODE mode is similar to
UNICODE mode, just strings are encoded in ASCII and not in UTF-16.
With this change it is possible to setup SMB1 session with NTLM
authentication in non-UNICODE mode with Windows SMB server.
This change fixes mounting SMB1 servers with -o nounicode mount option
together with -o sec=ntlmssp mount option (which is the default sec=).
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
|
|
page is checked for null in __build_path_from_dentry_optional_prefix
when tcon->origin_fullpath is not set. However, the check is missing when
it is set.
Add a check to prevent a potential NULL pointer dereference.
Signed-off-by: Ruben Devos <devosruben6@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
|
