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| author | Jan Kara <jack@suse.cz> | 2023-04-11 14:10:19 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2023-05-08 03:11:18 +0200 |
| commit | 949f95ff39bf188e594e7ecd8e29b82eb108f5bf (patch) | |
| tree | 44699efa34673153e6884287fc77fa96e08de5cd /fs/ext4/super.c | |
| parent | ext4: fix WARNING in mb_find_extent (diff) | |
| download | linux-949f95ff39bf188e594e7ecd8e29b82eb108f5bf.tar.xz linux-949f95ff39bf188e594e7ecd8e29b82eb108f5bf.zip | |
ext4: fix lockdep warning when enabling MMP
When we enable MMP in ext4_multi_mount_protect() during mount or
remount, we end up calling sb_start_write() from write_mmp_block(). This
triggers lockdep warning because freeze protection ranks above s_umount
semaphore we are holding during mount / remount. The problem is harmless
because we are guaranteed the filesystem is not frozen during mount /
remount but still let's fix the warning by not grabbing freeze
protection from ext4_multi_mount_protect().
Cc: stable@kernel.org
Reported-by: syzbot+6b7df7d5506b32467149@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=ab7e5b6f400b7778d46f01841422e5718fb81843
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Link: https://lore.kernel.org/r/20230411121019.21940-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions