OrgACRN
/
acrn-kernel
mirror of https://github.com/projectacrn/acrn-kernel.git
1
0
Fork 0
Code Issues Releases Wiki Activity

fs: drop peer group ids under namespace lock 

commit cb2239c198 upstream.

When cleaning up peer group ids in the failure path we need to make sure
to hold on to the namespace lock. Otherwise another thread might just
turn the mount from a shared into a non-shared mount concurrently.

Link: https://lore.kernel.org/lkml/00000000000088694505f8132d77@google.com
Fixes: 2a1867219c ("fs: add mount_setattr()")
Reported-by: syzbot+8ac3859139c685c4f597@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org # 5.12+
Message-Id: <20230330-vfs-mount_setattr-propagation-fix-v1-1-37548d91533b@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christian Brauner 2023-03-30 09:13:16 +02:00 committed by Greg Kroah-Hartman
parent 3caa693781
commit ddca03d97d
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/namespace.c
View File

@ -4180,9 +4180,9 @@ static int do_mount_setattr(struct path *path, struct mount_kattr *kattr)
unlock_mount_hash();
if (kattr->propagation) {
namespace_unlock();
if (err)
cleanup_group_ids(mnt, NULL);
namespace_unlock();
}
return err;