Description
The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=749143 ↗
- http://secunia.com/advisories/48898 ↗
- https://github.com/torvalds/linux/commit/15291164b22a357cb211b618adfef4fa82fc0de3 ↗
- http://rhn.redhat.com/errata/RHSA-2012-0670.html ↗
- http://www.debian.org/security/2012/dsa-2469 ↗
- http://secunia.com/advisories/48964 ↗
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=15291164b22a357cb211b618adfef4fa82fc0de3 ↗
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html ↗
- http://rhn.redhat.com/errata/RHSA-2012-0571.html ↗
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1 ↗