| 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-2024-56750: erofs: fix blksize < PAGE_SIZE for file-backed mounts |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| erofs: fix blksize < PAGE_SIZE for file-backed mounts |
| |
| Adjust sb->s_blocksize{,_bits} directly for file-backed |
| mounts when the fs block size is smaller than PAGE_SIZE. |
| |
| Previously, EROFS used sb_set_blocksize(), which caused |
| a panic if bdev-backed mounts is not used. |
| |
| The Linux kernel CVE team has assigned CVE-2024-56750 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12 with commit fb176750266a3d7f42ebdcf28e8ba40350b27847 and fixed in 6.12.2 with commit 679d8537e5748241c71ac97a6b6dc919eae31716 |
| Issue introduced in 6.12 with commit fb176750266a3d7f42ebdcf28e8ba40350b27847 and fixed in 6.13 with commit bae0854160939a64a092516ff1b2f221402b843b |
| |
| 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-2024-56750 |
| 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/erofs/super.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/679d8537e5748241c71ac97a6b6dc919eae31716 |
| https://git.kernel.org/stable/c/bae0854160939a64a092516ff1b2f221402b843b |
