[PATCH 4.19 093/146] btrfs: fix missing semaphore unlock in btrfs_sync_file

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Robbie Ko <robbieko@xxxxxxxxxxxx>

commit 6ff06729c22ec0b7498d900d79cc88cfb8aceaeb upstream.

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@xxxxxxxxxxxxxxx # 4.19+
Signed-off-by: Robbie Ko <robbieko@xxxxxxxxxxxx>
Reviewed-by: Filipe Manana <fdmanana@xxxxxxxx>
[ add changelog ]
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/btrfs/file.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2137,6 +2137,7 @@ int btrfs_sync_file(struct file *file, l
 	 */
 	ret = start_ordered_ops(inode, start, end);
 	if (ret) {
+		up_write(&BTRFS_I(inode)->dio_sem);
 		inode_unlock(inode);
 		goto out;
 	}





[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux