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| author |   Jan Kara <jack@suse.cz> | 2022-06-15 15:22:29 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2022-06-16 10:55:57 +0200 |
| commit | 4bca7e80b6455772b4bf3f536dcbc19aac424d6a (patch) | |
| tree | 87cbecab60fbd8d7ebfc8281ff0e818de159bff4 /include | |
| parent | ext2: fix fs corruption when trying to remove a non-empty directory with IO error (diff) | |
| download | linux-dev-4bca7e80b6455772b4bf3f536dcbc19aac424d6a.tar.xz linux-dev-4bca7e80b6455772b4bf3f536dcbc19aac424d6a.zip | |
init: Initialize noop_backing_dev_info early
noop_backing_dev_info is used by superblocks of various
pseudofilesystems such as kdevtmpfs. After commit 10e14073107d
("writeback: Fix inode->i_io_list not be protected by inode->i_lock
error") this broke because __mark_inode_dirty() started to access more
fields from noop_backing_dev_info and this led to crashes inside
locked_inode_to_wb_and_lock_list() called from __mark_inode_dirty().
Fix the problem by initializing noop_backing_dev_info before the
filesystems get mounted.
Fixes: 10e14073107d ("writeback: Fix inode->i_io_list not be protected by inode->i_lock error")
Reported-and-tested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reported-and-tested-by: Alexandru Elisei <alexandru.elisei@arm.com>
Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/backing-dev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index 2bd073fa6bb5..d452071db572 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -119,6 +119,8 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio); extern struct backing_dev_info noop_backing_dev_info; +int bdi_init(struct backing_dev_info *bdi); + /** * writeback_in_progress - determine whether there is writeback in progress * @wb: bdi_writeback of interest |