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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-05-24 14:55:44 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-05-24 15:05:16 +0300 |
| commit | b49c15f97c936ef5a536821f97e4dd8568369802 (patch) | |
| tree | 74c60e302f449841b1321cc8e951680fa743e8d8 /fs/nfs | |
| parent | 08cb5b0f058a325fcb5305e33f572ff6d6dfa289 (diff) | |
| download | linux-b49c15f97c936ef5a536821f97e4dd8568369802.tar.xz | |
NFSv4.0: Fix a lock leak in nfs40_walk_client_list
Xiaolong Ye's kernel test robot detected the following Oops:
[ 299.158991] BUG: scheduling while atomic: mount.nfs/9387/0x00000002
[ 299.169587] 2 locks held by mount.nfs/9387:
[ 299.176165] #0: (nfs_clid_init_mutex){......}, at: [<ffffffff8130cc92>] nfs4_discover_server_trunking+0x47/0x1fc
[ 299.201802] #1: (&(&nn->nfs_client_lock)->rlock){......}, at: [<ffffffff813125fa>] nfs40_walk_client_list+0x2e9/0x338
[ 299.221979] CPU: 0 PID: 9387 Comm: mount.nfs Not tainted 4.11.0-rc7-00021-g14d1bbb #45
[ 299.235584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.3-20161025_171302-gandalf 04/01/2014
[ 299.251176] Call Trace:
[ 299.255192] dump_stack+0x61/0x7e
[ 299.260416] __schedule_bug+0x65/0x74
[ 299.266208] __schedule+0x5d/0x87c
[ 299.271883] schedule+0x89/0x9a
[ 299.276937] schedule_timeout+0x232/0x289
[ 299.283223] ? detach_if_pending+0x10b/0x10b
[ 299.289935] schedule_timeout_uninterruptible+0x2a/0x2c
[ 299.298266] ? put_rpccred+0x3e/0x115
[ 299.304327] ? schedule_timeout_uninterruptible+0x2a/0x2c
[ 299.312851] msleep+0x1e/0x22
[ 299.317612] nfs4_discover_server_trunking+0x102/0x1fc
[ 299.325644] nfs4_init_client+0x13f/0x194
It looks as if we recently added a spin_lock() leak to
nfs40_walk_client_list() when cleaning up the code.
Reported-by: kernel test robot <xiaolong.ye@intel.com>
Fixes: 14d1bbb0ca42 ("NFS: Create a common nfs4_match_client() function")
Cc: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/nfs4client.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c index 692a7a8bfc7a..66776f022111 100644 --- a/fs/nfs/nfs4client.c +++ b/fs/nfs/nfs4client.c @@ -582,7 +582,6 @@ int nfs40_walk_client_list(struct nfs_client *new, */ nfs4_schedule_path_down_recovery(pos); default: - spin_lock(&nn->nfs_client_lock); goto out; } |