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/openbmc/linux/fs/ext2/
H A Ddir.c27e714c0 Fri Nov 25 21:17:17 CST 2022 Al Viro <viro@zeniv.linux.org.uk> ext2: unbugger ext2_empty_dir()

In 27cfa258951a "ext2: fix fs corruption when trying to remove
a non-empty directory with IO error" a funny thing has happened:

- page = ext2_get_page(inode, i, dir_has_error, &page_addr);
+ page = ext2_get_page(inode, i, 0, &page_addr);

- if (IS_ERR(page)) {
- dir_has_error = 1;
- continue;
- }
+ if (IS_ERR(page))
+ goto not_empty;

And at not_empty: we hit ext2_put_page(page, page_addr), which does
put_page(page). Which, unless I'm very mistaken, should oops
immediately when given ERR_PTR(-E...) as page.

OK, shit happens, insufficiently tested patches included. But when
commit in question describes the fault-injection test that exercised
that particular failure exit...

Ow.

CC: stable@vger.kernel.org
Fixes: 27cfa258951a ("ext2: fix fs corruption when trying to remove a non-empty directory with IO error")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jan Kara <jack@suse.cz>