This is a note to let you know that I've just added the patch titled
xfs: fallocate() should call file_modified()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
xfs-fallocate-should-call-file_modified.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e5772e2e8f1bfd5feeb4caa9e37d2a6600aa82de
Author: Dave Chinner <dchinner@xxxxxxxxxx>
Date: Tue Mar 7 10:59:14 2023 -0800
xfs: fallocate() should call file_modified()
commit fbe7e520036583a783b13ff9744e35c2a329d9a4 upsream.
In XFS, we always update the inode change and modification time when
any fallocate() operation succeeds. Furthermore, as various
fallocate modes can change the file contents (extending EOF,
punching holes, zeroing things, shifting extents), we should drop
file privileges like suid just like we do for a regular write().
There's already a VFS helper that figures all this out for us, so
use that.
The net effect of this is that we no longer drop suid/sgid if the
caller is root, but we also now drop file capabilities.
We also move the xfs_update_prealloc_flags() function so that it now
is only called by the scope that needs to set the the prealloc flag.
Based on a patch from Darrick Wong.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
Tested-by: Leah Rumancik <leah.rumancik@xxxxxxxxx>
Acked-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 752b676c92e3f..020e0a412287a 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -954,6 +954,10 @@ xfs_file_fallocate(
goto out_unlock;
}
+ error = file_modified(file);
+ if (error)
+ goto out_unlock;
+
if (mode & FALLOC_FL_PUNCH_HOLE) {
error = xfs_free_file_space(ip, offset, len);
if (error)
@@ -1055,11 +1059,12 @@ xfs_file_fallocate(
if (error)
goto out_unlock;
}
- }
- error = xfs_update_prealloc_flags(ip, flags);
- if (error)
- goto out_unlock;
+ error = xfs_update_prealloc_flags(ip, XFS_PREALLOC_SET);
+ if (error)
+ goto out_unlock;
+
+ }
/* Change file size if needed */
if (new_size) {
