diff mbox series

[4.19,bp] ext4: don't remount read-only with errors=continue on reboot

Message ID 2c1466be-7b5d-1e50-bcc2-3bcb9478fba2@gmail.com
State New
Headers show
Series [4.19,bp] ext4: don't remount read-only with errors=continue on reboot | expand

Commit Message

Jinoh Kang Jan. 1, 2021, 3:09 p.m. UTC 
From: Jan Kara <jack@suse.cz>

commit b08070eca9e247f60ab39d79b2c25d274750441f upstream.

ext4_handle_error() with errors=continue mount option can accidentally
remount the filesystem read-only when the system is rebooting. Fix that.

Fixes: 1dc1097ff60e ("ext4: avoid panic during forced reboot")
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20201127113405.26867-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/super.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
diff mbox series

Patch

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ee96f504ed78..e9e9f09f5370 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -454,19 +454,17 @@  static bool system_going_down(void)
 
 static void ext4_handle_error(struct super_block *sb)
 {
+	journal_t *journal = EXT4_SB(sb)->s_journal;
+
 	if (test_opt(sb, WARN_ON_ERROR))
 		WARN_ON_ONCE(1);
 
-	if (sb_rdonly(sb))
+	if (sb_rdonly(sb) || test_opt(sb, ERRORS_CONT))
 		return;
 
-	if (!test_opt(sb, ERRORS_CONT)) {
-		journal_t *journal = EXT4_SB(sb)->s_journal;
-
-		EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED;
-		if (journal)
-			jbd2_journal_abort(journal, -EIO);
-	}
+	EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED;
+	if (journal)
+		jbd2_journal_abort(journal, -EIO);
 	/*
 	 * We force ERRORS_RO behavior when system is rebooting. Otherwise we
 	 * could panic during 'reboot -f' as the underlying device got already