| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-56550: s390/stacktrace: Use break instead of return statement |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| s390/stacktrace: Use break instead of return statement |
| |
| arch_stack_walk_user_common() contains a return statement instead of a |
| break statement in case store_ip() fails while trying to store a callchain |
| entry of a user space process. |
| This may lead to a missing pagefault_enable() call. |
| |
| If this happens any subsequent page fault of the process won't be resolved |
| by the page fault handler and this in turn will lead to the process being |
| killed. |
| |
| Use a break instead of a return statement to fix this. |
| |
| The Linux kernel CVE team has assigned CVE-2024-56550 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.10 with commit ebd912ff9919a10609511383d94942362234c077 and fixed in 6.12.4 with commit 20c26357826457dc7c8145297e60ddc012e18914 |
| Issue introduced in 6.10 with commit ebd912ff9919a10609511383d94942362234c077 and fixed in 6.13 with commit 588a9836a4ef7ec3bfcffda526dfa399637e6cfc |
| Issue introduced in 6.9.4 with commit dd69165ac3dc12d8550aeec3fc4439c084ded3d8 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-56550 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| arch/s390/kernel/stacktrace.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/20c26357826457dc7c8145297e60ddc012e18914 |
| https://git.kernel.org/stable/c/588a9836a4ef7ec3bfcffda526dfa399637e6cfc |
