| 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-2024-50216: xfs: fix finding a last resort AG in xfs_filestream_pick_ag |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| xfs: fix finding a last resort AG in xfs_filestream_pick_ag |
| |
| When the main loop in xfs_filestream_pick_ag fails to find a suitable |
| AG it tries to just pick the online AG. But the loop for that uses |
| args->pag as loop iterator while the later code expects pag to be |
| set. Fix this by reusing the max_pag case for this last resort, and |
| also add a check for impossible case of no AG just to make sure that |
| the uninitialized pag doesn't even escape in theory. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50216 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.3 with commit f8f1ed1ab3babad46b25e2dbe8de43b33fe7aaa6 and fixed in 6.6.60 with commit 77ddc732416b017180893cbb2356e9f0a414c575 |
| Issue introduced in 6.3 with commit f8f1ed1ab3babad46b25e2dbe8de43b33fe7aaa6 and fixed in 6.11.7 with commit a023408925acd64db5c8980373fcb3e28ec6fd29 |
| Issue introduced in 6.3 with commit f8f1ed1ab3babad46b25e2dbe8de43b33fe7aaa6 and fixed in 6.12 with commit dc60992ce76fbc2f71c2674f435ff6bde2108028 |
| |
| 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-2024-50216 |
| 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: |
| fs/xfs/xfs_filestream.c |
| fs/xfs/xfs_trace.h |
| |
| |
| 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/77ddc732416b017180893cbb2356e9f0a414c575 |
| https://git.kernel.org/stable/c/a023408925acd64db5c8980373fcb3e28ec6fd29 |
| https://git.kernel.org/stable/c/dc60992ce76fbc2f71c2674f435ff6bde2108028 |
