This is a note to let you know that I've just added the patch titled
gfs2: don't withdraw if init_threads() got interrupted
to the 6.6-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:
gfs2-don-t-withdraw-if-init_threads-got-interrupted.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0cdc6f44e9fdc2d20d720145bf99a39f611f6d61 Mon Sep 17 00:00:00 2001
From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Date: Thu, 2 Nov 2023 20:52:30 +0100
Subject: gfs2: don't withdraw if init_threads() got interrupted
From: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
commit 0cdc6f44e9fdc2d20d720145bf99a39f611f6d61 upstream.
In gfs2_fill_super(), when mounting a gfs2 filesystem is interrupted,
kthread_create() can return -EINTR. When that happens, we roll back
what has already been done and abort the mount.
Since commit 62dd0f98a0e5 ("gfs2: Flag a withdraw if init_threads()
fails), we are calling gfs2_withdraw_delayed() in gfs2_fill_super();
first via gfs2_make_fs_rw(), then directly. But gfs2_withdraw_delayed()
only marks the filesystem as withdrawing and relies on a caller further
up the stack to do the actual withdraw, which doesn't exist in the
gfs2_fill_super() case. Because the filesystem is marked as withdrawing
/ withdrawn, function gfs2_lm_unmount() doesn't release the dlm
lockspace, so when we try to mount that filesystem again, we get:
gfs2: fsid=gohan:gohan0: Trying to join cluster "lock_dlm", "gohan:gohan0"
gfs2: fsid=gohan:gohan0: dlm_new_lockspace error -17
Since commit b77b4a4815a9 ("gfs2: Rework freeze / thaw logic"), the
deadlock this gfs2_withdraw_delayed() call was supposed to work around
cannot occur anymore because freeze_go_callback() won't take the
sb->s_umount semaphore unconditionally anymore, so we can get rid of the
gfs2_withdraw_delayed() in gfs2_fill_super() entirely.
Reported-by: Alexander Aring <aahringo@xxxxxxxxxx>
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v6.5+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/gfs2/ops_fstype.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1281,10 +1281,8 @@ static int gfs2_fill_super(struct super_
if (!sb_rdonly(sb)) {
error = init_threads(sdp);
- if (error) {
- gfs2_withdraw_delayed(sdp);
+ if (error)
goto fail_per_node;
- }
}
error = gfs2_freeze_lock_shared(sdp);
Patches currently in stable-queue which might be from agruenba@xxxxxxxxxx are
queue-6.6/gfs2-fix-an-oops-in-gfs2_permission.patch
queue-6.6/gfs2-ignore-negated-quota-changes.patch
queue-6.6/gfs2-don-t-withdraw-if-init_threads-got-interrupted.patch
queue-6.6/gfs2-fix-slab-use-after-free-in-gfs2_qd_dealloc.patch
queue-6.6/gfs2-silence-suspicious-rcu-usage-in-gfs2_permission.patch
