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ext4: don't remount read-only with errors=continue on reboot

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[ 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: 1dc1097ff6 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jan Kara 2020-11-27 12:33:54 +01:00 • committed by Greg Kroah-Hartman
commit 11459136a1
1 changed files with 6 additions and 8 deletions
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14
fs/ext4/super.c
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@ -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