| 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-2023-52682: f2fs: fix to wait on block writeback for post_read case |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| f2fs: fix to wait on block writeback for post_read case |
| |
| If inode is compressed, but not encrypted, it missed to call |
| f2fs_wait_on_block_writeback() to wait for GCed page writeback |
| in IPU write path. |
| |
| Thread A GC-Thread |
| - f2fs_gc |
| - do_garbage_collect |
| - gc_data_segment |
| - move_data_block |
| - f2fs_submit_page_write |
| migrate normal cluster's block via |
| meta_inode's page cache |
| - f2fs_write_single_data_page |
| - f2fs_do_write_data_page |
| - f2fs_inplace_write_data |
| - f2fs_submit_page_bio |
| |
| IRQ |
| - f2fs_read_end_io |
| IRQ |
| old data overrides new data due to |
| out-of-order GC and common IO. |
| - f2fs_read_end_io |
| |
| The Linux kernel CVE team has assigned CVE-2023-52682 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit 4c8ff7095bef64fc47e996a938f7d57f9e077da3 and fixed in 6.1.75 with commit 9bfd5ea71521d0e522ba581c6ccc5db93759c0c3 |
| Issue introduced in 5.6 with commit 4c8ff7095bef64fc47e996a938f7d57f9e077da3 and fixed in 6.6.14 with commit 4535be48780431753505e74e1b1ad4836a189bc2 |
| Issue introduced in 5.6 with commit 4c8ff7095bef64fc47e996a938f7d57f9e077da3 and fixed in 6.7.2 with commit f904c156d8011d8291ffd5b6b398f3747e294986 |
| Issue introduced in 5.6 with commit 4c8ff7095bef64fc47e996a938f7d57f9e077da3 and fixed in 6.8 with commit 55fdc1c24a1d6229fe0ecf31335fb9a2eceaaa00 |
| |
| 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-2023-52682 |
| 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/f2fs/data.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/9bfd5ea71521d0e522ba581c6ccc5db93759c0c3 |
| https://git.kernel.org/stable/c/4535be48780431753505e74e1b1ad4836a189bc2 |
| https://git.kernel.org/stable/c/f904c156d8011d8291ffd5b6b398f3747e294986 |
| https://git.kernel.org/stable/c/55fdc1c24a1d6229fe0ecf31335fb9a2eceaaa00 |
