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Bug 234812 (CVE-2008-3534) - Linux <2.6.26.1 tmpfs: fix kernel BUG in shmem_delete_inode (CVE-2008-3534)
Summary: Linux <2.6.26.1 tmpfs: fix kernel BUG in shmem_delete_inode (CVE-2008-3534)
Status: RESOLVED FIXED
Alias: CVE-2008-3534
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL: http://git.kernel.org/?p=linux/kernel...
Whiteboard: [linux <2.6.25.14] [linux >=2.6.26 <2...
Keywords:
Depends on:
Blocks:
 
Reported: 2008-08-15 12:47 UTC by Robert Buchholz (RETIRED)
Modified: 2013-09-05 03:47 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Robert Buchholz (RETIRED) gentoo-dev 2008-08-15 12:47:43 UTC
CVE-2008-3534 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-3534):
  The shmem_delete_inode function in mm/shmem.c in the tmpfs implementation in
  the Linux kernel before 2.6.26.1 allows local users to cause a denial of
  service (system crash) via a certain sequence of file create, remove, and
  overwrite operations, as demonstrated by the insserv program, related to
  allocation of "useless pages" and improper maintenance of the i_blocks count.
Comment 1 Robert Buchholz (RETIRED) gentoo-dev 2008-08-15 12:49:45 UTC
Fixed in 2.6.25.14 and 2.6.26.1
Comment 2 Kerin Millar 2009-07-20 22:46:49 UTC
Beware, the patch introduced an independent bug which was subsequently fixed in 2.6.25.17 and 2.6.26.4 respectively:

"fbdefio: add set_page_dirty handler to deferred IO FB"
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d847471d063663b9f36927d265c66a270c0cfaab

Anyhow, hardened-kernel unaffected at present time. Removing alias.

PS: genpatches-2.6.25-10 added 2.6.25.14. genpatches-2.6.25-3 added 2.6.26.1.