diff options
| author | Christoph Hellwig <hch@lst.de> | 2016-10-03 01:47:34 +0300 |
|---|---|---|
| committer | Dave Chinner <david@fromorbit.com> | 2016-10-03 01:47:34 +0300 |
| commit | a447d7cd15c759d8ab7f3c9c8183aa8c999d7ed4 (patch) | |
| tree | 5eccbbc0cc8d2b2d4b465f1739d1487b5e26b124 | |
| parent | 5694fe9aadbb26874d2791de1db6ac08aa1b4c14 (diff) | |
| download | linux-a447d7cd15c759d8ab7f3c9c8183aa8c999d7ed4.tar.xz | |
xfs: update atime before I/O in xfs_file_dio_aio_read
After the call to __blkdev_direct_IO the final reference to the file
might have been dropped by aio_complete already, and the call to
file_accessed might cause a use after free.
Instead update the access time before the I/O, similar to how we
update the time stamps before writes.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-and-tested-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
| -rw-r--r-- | fs/xfs/xfs_file.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index e612a0233710..b927ea9abe33 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -269,6 +269,8 @@ xfs_file_dio_aio_read( return -EINVAL; } + file_accessed(iocb->ki_filp); + /* * Locking is a bit tricky here. If we take an exclusive lock for direct * IO, we effectively serialise all new concurrent read IO to this file @@ -323,7 +325,6 @@ xfs_file_dio_aio_read( } xfs_rw_iunlock(ip, XFS_IOLOCK_SHARED); - file_accessed(iocb->ki_filp); return ret; } |