diff options
| author | Jan Kara <jack@suse.cz> | 2017-04-05 13:32:52 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2017-04-05 14:23:45 +0200 |
| commit | 65547661500885dde26ca4a75d4d7f7df587c88e (patch) | |
| tree | 72f05ce433afc3249d1ec242679c4c04d041e9e2 /fs/ext2/ext2.h | |
| parent | ab4949640d6674b617b314ad3c2c00353304bab9 (diff) | |
| download | linux-next-65547661500885dde26ca4a75d4d7f7df587c88e.tar.gz | |
ext2: Call dquot_writeback_dquots() with s_umount held
ext2_sync_fs() could be called without s_umount semaphore held when
called through ext2_write_super() from __ext2_write_inode(). This
function then calls dquot_writeback_dquots() which relies on s_umount to
be held for protection against other quota operations.
In fact __ext2_write_inode() does not need all the functionality
ext2_write_super() provides. It is enough to just write the superblock.
So use ext2_sync_super() instead.
Fixes: 9d1ccbe70e0b14545caad12dc73adb3605447df0
Reported-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2/ext2.h')
| -rw-r--r-- | fs/ext2/ext2.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 5e64de9c5093..dca3604b9970 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -796,7 +796,8 @@ void ext2_error(struct super_block *, const char *, const char *, ...); extern __printf(3, 4) void ext2_msg(struct super_block *, const char *, const char *, ...); extern void ext2_update_dynamic_rev (struct super_block *sb); -extern void ext2_write_super (struct super_block *); +extern void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es, + int wait); /* * Inodes and files operations |