kernel/trace/ftrace.c in the Linux kernel before 2.6.35.5, when debugfs is enabled, does not properly handle interaction between mutex possession and llseek operations, which allows local users to cause a denial of service (NULL pointer dereference and outage of all function tracing files) via an lseek call on a file descriptor associated with the set_ftrace_filter file.
The product dereferences a pointer that it expects to be valid but is NULL.
| Link | Tags |
|---|---|
| http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35.5 | broken link |
| http://www.ubuntu.com/usn/USN-1041-1 | third party advisory vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html | mailing list third party advisory vendor advisory |
| http://www.redhat.com/support/errata/RHSA-2010-0842.html | vendor advisory broken link |
| http://www.vupen.com/english/advisories/2011/0298 | vdb entry broken link |
| http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00003.html | mailing list third party advisory vendor advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=631623 | issue tracking third party advisory patch |
| http://secunia.com/advisories/42758 | third party advisory broken link |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=9c55cb12c1c172e2d51e85fbb5a4796ca86b77e7 | |
| http://www.securityfocus.com/bid/43684 | vdb entry third party advisory |
| http://www.vupen.com/english/advisories/2011/0070 | vdb entry broken link |