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Message-Id: <20210104155706.299546196@linuxfoundation.org>
Date: Mon, 4 Jan 2021 16:57:10 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Jan Kara <jack@...e.cz>,
Andreas Dilger <adilger@...ger.ca>, stable@...nel.org,
Theodore Tso <tytso@....edu>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 11/47] ext4: dont remount read-only with errors=continue on reboot
From: Jan Kara <jack@...e.cz>
[ Upstream commit b08070eca9e247f60ab39d79b2c25d274750441f ]
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@...e.cz>
Reviewed-by: Andreas Dilger <adilger@...ger.ca>
Cc: stable@...nel.org
Link: https://lore.kernel.org/r/20201127113405.26867-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
fs/ext4/super.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 920658ca8777d..06568467b0c27 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -455,19 +455,17 @@ 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
--
2.27.0
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