The inode double locking code in fs/ocfs2/file.c in the Linux kernel 2.6.30 before 2.6.30-rc3, 2.6.27 before 2.6.27.24, 2.6.29 before 2.6.29.4, and possibly other versions down to 2.6.19 allows local users to cause a denial of service (prevention of file creation and removal) via a series of splice system calls that trigger a deadlock between the generic_file_splice_write, splice_from_pipe, and ocfs2_file_splice_write functions.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-1961
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7bfac9ecf0585962fe13584f5cf526d8c8e76f17
• http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
• http://lists.opensuse.org/opensuse-security-announce/2009-07/msg00004.html
• http://secunia.com/advisories/35390
• http://secunia.com/advisories/35394
• http://secunia.com/advisories/35656
• http://secunia.com/advisories/35847
• http://secunia.com/advisories/36051
• http://securitytracker.com/id?1022307
• http://www.debian.org/security/2009/dsa-1844
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:135
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:148
• http://www.openwall.com/lists/oss-security/2009/05/29/2
• http://www.openwall.com/lists/oss-security/2009/05/30/1
• http://www.openwall.com/lists/oss-security/2009/06/02/2
• http://www.openwall.com/lists/oss-security/2009/06/03/1
• http://www.redhat.com/support/errata/RHSA-2009-1157.html
• http://www.securityfocus.com/bid/35143
• http://www.ubuntu.com/usn/usn-793-1
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=7bfac9ecf0585962fe13584f5cf526d8c8e76f17