The x86_assign_hw_event function in arch/x86/kernel/cpu/perf_event.c in the Performance Events subsystem in the Linux kernel before 2.6.39 does not properly calculate counter values, which allows local users to cause a denial of service (panic) via the perf program.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.39 (excluding) |
| Red Hat Enterprise Linux 6 | RedHat | kernel-0:2.6.32-131.17.1.el6 | * |
| Linux | Ubuntu | upstream | * |
| Linux-ec2 | Ubuntu | maverick | * |
| Linux-ec2 | Ubuntu | upstream | * |
| Linux-fsl-imx51 | Ubuntu | upstream | * |
| Linux-lts-backport-maverick | Ubuntu | upstream | * |
| Linux-lts-backport-natty | Ubuntu | upstream | * |
| Linux-mvl-dove | Ubuntu | upstream | * |
| Linux-ti-omap4 | Ubuntu | upstream | * |
References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc66c5210ec2539e800e87d7b3a985323c7be96e
- http://www.openwall.com/lists/oss-security/2011/07/06/4
- https://bugzilla.redhat.com/show_bug.cgi?id=719228
- https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96e
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc66c5210ec2539e800e87d7b3a985323c7be96e
- http://www.openwall.com/lists/oss-security/2011/07/06/4
- https://bugzilla.redhat.com/show_bug.cgi?id=719228
- https://github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96e