kernel/linux.git/net/compat.c, branch v6.1.168

use less confusing names for iov_iter direction initializers

2023-02-09T10:28:04+00:00

[ Upstream commit de4eda9de2d957ef2d6a8365a01e26a435e958cb ] READ/WRITE proved to be actively confusing - the meanings are "data destination, as used with read(2)" and "data source, as used with write(2)", but people keep interpreting those as "we read data from it" and "we write data to it", i.e. exactly the wrong way. Call them ITER_DEST and ITER_SOURCE - at least that is harder to misinterpret... Signed-off-by: Al Viro Stable-dep-of: 6dd88fd59da8 ("vhost-scsi: unbreak any layout for response") Signed-off-by: Sasha Levin

net: clear msg_get_inq in __get_compat_msghdr()

2022-09-20T15:23:20+00:00

syzbot is still complaining uninit-value in tcp_recvmsg(), for commit 1228b34c8d0ecf6d ("net: clear msg_get_inq in __sys_recvfrom() and __copy_msghdr_from_user()") missed that __get_compat_msghdr() is called instead of copy_msghdr_from_user() when MSG_CMSG_COMPAT is specified. Signed-off-by: Tetsuo Handa Fixes: 1228b34c8d0ecf6d ("net: clear msg_get_inq in __sys_recvfrom() and __copy_msghdr_from_user()") Reviewed-by: Jens Axboe Link: https://lore.kernel.org/r/d06d0f7f-696c-83b4-b2d5-70b5f2730a37@I-love.SAKURA.ne.jp Signed-off-by: Jakub Kicinski

Merge branch 'for-5.20/io_uring' into for-5.20/io_uring-zerocopy-send

2022-07-25T00:41:03+00:00

* for-5.20/io_uring: (716 commits) io_uring: ensure REQ_F_ISREG is set async offload net: fix compat pointer in get_compat_msghdr() io_uring: Don't require reinitable percpu_ref io_uring: fix types in io_recvmsg_multishot_overflow io_uring: Use atomic_long_try_cmpxchg in __io_account_mem io_uring: support multishot in recvmsg net: copy from user before calling __get_compat_msghdr net: copy from user before calling __copy_msghdr io_uring: support 0 length iov in buffer select in compat io_uring: fix multishot ending when not polled io_uring: add netmsg cache io_uring: impose max limit on apoll cache io_uring: add abstraction around apoll cache io_uring: move apoll cache to poll.c io_uring: consolidate hash_locked io-wq handling io_uring: clear REQ_F_HASH_LOCKED on hash removal io_uring: don't race double poll setting REQ_F_ASYNC_DATA io_uring: don't miss setting REQ_F_DOUBLE_POLL io_uring: disable multishot recvmsg io_uring: only trace one of complete or overflow ... Signed-off-by: Jens Axboe

net: fix compat pointer in get_compat_msghdr()

2022-07-25T00:39:18+00:00

A previous change enabled external users to copy the data before calling __get_compat_msghdr(), but didn't modify get_compat_msghdr() or __io_compat_recvmsg_copy_hdr() to take that into account. They are both stil passing in the __user pointer rather than the copied version. Ensure we pass in the kernel struct, not the pointer to the user data. Link: https://lore.kernel.org/all/46439555-644d-08a1-7d66-16f8f9a320f0@samsung.com/ Fixes: 1a3e4e94a1b9 ("net: copy from user before calling __get_compat_msghdr") Reported-by: Marek Szyprowski Signed-off-by: Jens Axboe

net: copy from user before calling __get_compat_msghdr

2022-07-25T00:39:17+00:00

this is in preparation for multishot receive from io_uring, where it needs to have access to the original struct user_msghdr. functionally this should be a no-op. Acked-by: Paolo Abeni Signed-off-by: Dylan Yudaken Link: https://lore.kernel.org/r/20220714110258.1336200-3-dylany@fb.com Signed-off-by: Jens Axboe

skbuff: carry external ubuf_info in msghdr

2022-07-19T21:20:42+00:00

Make possible for network in-kernel callers like io_uring to pass in a custom ubuf_info by setting it in a new field of struct msghdr. Signed-off-by: Pavel Begunkov Signed-off-by: Jakub Kicinski

net: Return the correct errno code

2021-06-03T22:13:56+00:00

When kalloc or kmemdup failed, should return ENOMEM rather than ENOBUF. Signed-off-by: Zheng Yongjun Signed-off-by: David S. Miller

iov_iter: transparently handle compat iovecs in import_iovec

2020-10-03T04:02:13+00:00

Use in compat_syscall to import either native or the compat iovecs, and remove the now superflous compat_import_iovec. This removes the need for special compat logic in most callers, and the remaining ones can still be simplified by using __import_iovec with a bool compat parameter. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro

net/scm: Fix typo in SCM_RIGHTS compat refactoring

2020-08-07T19:43:25+00:00

When refactoring the SCM_RIGHTS code, I accidentally mis-merged my native/compat diffs, which entirely broke using SCM_RIGHTS in compat mode. Use the correct helper. Reported-by: Christian Zigotzky Link: https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-August/216156.html Reported-by: "Alex Xu (Hello71)" Link: https://lore.kernel.org/lkml/1596812929.lz7fuo8r2w.none@localhost/ Suggested-by: Thadeu Lima de Souza Cascardo Fixes: c0029de50982 ("net/scm: Regularize compat handling of scm_detach_fds()") Tested-by: Alex Xu (Hello71) Acked-by: Thadeu Lima de Souza Cascardo Signed-off-by: Kees Cook

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2020-08-06T03:13:21+00:00

Pull networking updates from David Miller: 1) Support 6Ghz band in ath11k driver, from Rajkumar Manoharan. 2) Support UDP segmentation in code TSO code, from Eric Dumazet. 3) Allow flashing different flash images in cxgb4 driver, from Vishal Kulkarni. 4) Add drop frames counter and flow status to tc flower offloading, from Po Liu. 5) Support n-tuple filters in cxgb4, from Vishal Kulkarni. 6) Various new indirect call avoidance, from Eric Dumazet and Brian Vazquez. 7) Fix BPF verifier failures on 32-bit pointer arithmetic, from Yonghong Song. 8) Support querying and setting hardware address of a port function via devlink, use this in mlx5, from Parav Pandit. 9) Support hw ipsec offload on bonding slaves, from Jarod Wilson. 10) Switch qca8k driver over to phylink, from Jonathan McDowell. 11) In bpftool, show list of processes holding BPF FD references to maps, programs, links, and btf objects. From Andrii Nakryiko. 12) Several conversions over to generic power management, from Vaibhav Gupta. 13) Add support for SO_KEEPALIVE et al. to bpf_setsockopt(), from Dmitry Yakunin. 14) Various https url conversions, from Alexander A. Klimov. 15) Timestamping and PHC support for mscc PHY driver, from Antoine Tenart. 16) Support bpf iterating over tcp and udp sockets, from Yonghong Song. 17) Support 5GBASE-T i40e NICs, from Aleksandr Loktionov. 18) Add kTLS RX HW offload support to mlx5e, from Tariq Toukan. 19) Fix the ->ndo_start_xmit() return type to be netdev_tx_t in several drivers. From Luc Van Oostenryck. 20) XDP support for xen-netfront, from Denis Kirjanov. 21) Support receive buffer autotuning in MPTCP, from Florian Westphal. 22) Support EF100 chip in sfc driver, from Edward Cree. 23) Add XDP support to mvpp2 driver, from Matteo Croce. 24) Support MPTCP in sock_diag, from Paolo Abeni. 25) Commonize UDP tunnel offloading code by creating udp_tunnel_nic infrastructure, from Jakub Kicinski. 26) Several pci_ --> dma_ API conversions, from Christophe JAILLET. 27) Add FLOW_ACTION_POLICE support to mlxsw, from Ido Schimmel. 28) Add SK_LOOKUP bpf program type, from Jakub Sitnicki. 29) Refactor a lot of networking socket option handling code in order to avoid set_fs() calls, from Christoph Hellwig. 30) Add rfc4884 support to icmp code, from Willem de Bruijn. 31) Support TBF offload in dpaa2-eth driver, from Ioana Ciornei. 32) Support XDP_REDIRECT in qede driver, from Alexander Lobakin. 33) Support PCI relaxed ordering in mlx5 driver, from Aya Levin. 34) Support TCP syncookies in MPTCP, from Flowian Westphal. 35) Fix several tricky cases of PMTU handling wrt. briding, from Stefano Brivio. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2056 commits) net: thunderx: initialize VF's mailbox mutex before first usage usb: hso: remove bogus check for EINPROGRESS usb: hso: no complaint about kmalloc failure hso: fix bailout in error case of probe ip_tunnel_core: Fix build for archs without _HAVE_ARCH_IPV6_CSUM selftests/net: relax cpu affinity requirement in msg_zerocopy test mptcp: be careful on subflow creation selftests: rtnetlink: make kci_test_encap() return sub-test result selftests: rtnetlink: correct the final return value for the test net: dsa: sja1105: use detected device id instead of DT one on mismatch tipc: set ub->ifindex for local ipv6 address ipv6: add ipv6_dev_find() net: openvswitch: silence suspicious RCU usage warning Revert "vxlan: fix tos value before xmit" ptp: only allow phase values lower than 1 period farsync: switch from 'pci_' to 'dma_' API wan: wanxl: switch from 'pci_' to 'dma_' API hv_netvsc: do not use VF device if link is down dpaa2-eth: Fix passing zero to 'PTR_ERR' warning net: macb: Properly handle phylink on at91sam9x ...