gfs2: fix freeze error handling

After commit b77b4a4815a9 ("gfs2: Rework freeze / thaw logic"),
the freeze error handling is broken because gfs2_do_thaw()
overwrites the 'error' variable, causing incorrect processing
of the original freeze error.

Fix this by calling gfs2_do_thaw() when gfs2_lock_fs_check_clean()
fails but ignoring its return value to preserve the original
freeze error for proper reporting.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: b77b4a4815a9 ("gfs2: Rework freeze / thaw logic")
Cc: stable@vger.kernel.org # v6.5+
Signed-off-by: Alexey Velichayshiy <a.velichayshiy@ispras.ru>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 644b2d1e72769e8be59baa471d5d7e34e4be37a9..54c6f2098f01ef320e29589ee1ace0fef753f845 100644 (file)
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -749,9 +749,7 @@ static int gfs2_freeze_super(struct super_block *sb, enum freeze_holder who,
                        break;
                }
 
-               error = gfs2_do_thaw(sdp, who, freeze_owner);
-               if (error)
-                       goto out;
+               (void)gfs2_do_thaw(sdp, who, freeze_owner);
 
                if (error == -EBUSY)
                        fs_err(sdp, "waiting for recovery before freeze\n");