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| author | Robbie Ko <robbieko@synology.com> | 2020-03-17 14:31:02 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-03-25 16:29:16 +0100 |
| commit | 6ff06729c22ec0b7498d900d79cc88cfb8aceaeb (patch) | |
| tree | 90d285bcd137735cd26ca942412fdc47065df5b0 | |
| parent | 351cbf6e4410e7ece05e35d0a07320538f2418b4 (diff) | |
| download | linux-6ff06729c22ec0b7498d900d79cc88cfb8aceaeb.tar.gz linux-6ff06729c22ec0b7498d900d79cc88cfb8aceaeb.tar.bz2 linux-6ff06729c22ec0b7498d900d79cc88cfb8aceaeb.zip | |
btrfs: fix missing semaphore unlock in btrfs_sync_file
Ordered ops are started twice in sync file, once outside of inode mutex
and once inside, taking the dio semaphore. There was one error path
missing the semaphore unlock.
Fixes: aab15e8ec2576 ("Btrfs: fix rare chances for data loss when doing a fast fsync")
CC: stable@vger.kernel.org # 4.19+
Signed-off-by: Robbie Ko <robbieko@synology.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
[ add changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/file.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 20107f42a766..8a144f9cb7ac 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -2117,6 +2117,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) */ ret = start_ordered_ops(inode, start, end); if (ret) { + up_write(&BTRFS_I(inode)->dio_sem); inode_unlock(inode); goto out; } |