[<prev] [next>] [day] [month] [year] [list]
Message-ID: <fe41809854d203124f41164b8374456a@cs.fsu.edu>
Date: Sat, 12 Feb 2022 02:04:11 -0500
From: Wenqing Liu <liu@...fsu.edu>
To: oss-security@...ts.openwall.com
Subject: CVE-2021-44879: kernel:NULL pointer dereference in
fs/f2fs/gc.c:move_data_page
Description:
In move_data_page in fs/f2fs/gc.c in the Linux kernel 5.15.1-5.15.16,
there is an NULL pointer dereference when f2fs tries to migrate a block
that belong to special file, and the file doesn't have assigned address
space operations pointer array for mapping->a_ops field but called
a_ops->set_dirty_page(). Could cause denial of service when mounting and
operate on the crafted image.
References:
https://bugzilla.kernel.org/show_bug.cgi?id=215231
https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao@kernel.org/T/
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
