| 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-2022-48877: f2fs: let's avoid panic if extent_tree is not created |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| f2fs: let's avoid panic if extent_tree is not created |
| |
| This patch avoids the below panic. |
| |
| pc : __lookup_extent_tree+0xd8/0x760 |
| lr : f2fs_do_write_data_page+0x104/0x87c |
| sp : ffffffc010cbb3c0 |
| x29: ffffffc010cbb3e0 x28: 0000000000000000 |
| x27: ffffff8803e7f020 x26: ffffff8803e7ed40 |
| x25: ffffff8803e7f020 x24: ffffffc010cbb460 |
| x23: ffffffc010cbb480 x22: 0000000000000000 |
| x21: 0000000000000000 x20: ffffffff22e90900 |
| x19: 0000000000000000 x18: ffffffc010c5d080 |
| x17: 0000000000000000 x16: 0000000000000020 |
| x15: ffffffdb1acdbb88 x14: ffffff888759e2b0 |
| x13: 0000000000000000 x12: ffffff802da49000 |
| x11: 000000000a001200 x10: ffffff8803e7ed40 |
| x9 : ffffff8023195800 x8 : ffffff802da49078 |
| x7 : 0000000000000001 x6 : 0000000000000000 |
| x5 : 0000000000000006 x4 : ffffffc010cbba28 |
| x3 : 0000000000000000 x2 : ffffffc010cbb480 |
| x1 : 0000000000000000 x0 : ffffff8803e7ed40 |
| Call trace: |
| __lookup_extent_tree+0xd8/0x760 |
| f2fs_do_write_data_page+0x104/0x87c |
| f2fs_write_single_data_page+0x420/0xb60 |
| f2fs_write_cache_pages+0x418/0xb1c |
| __f2fs_write_data_pages+0x428/0x58c |
| f2fs_write_data_pages+0x30/0x40 |
| do_writepages+0x88/0x190 |
| __writeback_single_inode+0x48/0x448 |
| writeback_sb_inodes+0x468/0x9e8 |
| __writeback_inodes_wb+0xb8/0x2a4 |
| wb_writeback+0x33c/0x740 |
| wb_do_writeback+0x2b4/0x400 |
| wb_workfn+0xe4/0x34c |
| process_one_work+0x24c/0x5bc |
| worker_thread+0x3e8/0xa50 |
| kthread+0x150/0x1b4 |
| |
| The Linux kernel CVE team has assigned CVE-2022-48877 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.14.304 with commit dd83a9763e29ed7a21c8a43f7a62cd0a6bf74692 |
| Fixed in 4.19.271 with commit ff85a1dbd90d29f73033177ff8d8de4a27d9721c |
| Fixed in 5.4.230 with commit 557e85ff9afef6d45020b6f09357111d38033c31 |
| Fixed in 5.10.165 with commit 72009139a661ade5cb1da4239734ed02fa1cfff0 |
| Fixed in 5.15.90 with commit 2c129e868992621a739bdd57a5bffa3985ef1b91 |
| Fixed in 6.1.8 with commit 1c38cdc747f00daf7394535eae5afc4c503c59bb |
| Fixed in 6.2 with commit df9d44b645b83fffccfb4e28c1f93376585fdec8 |
| |
| 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-2022-48877 |
| 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/extent_cache.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/dd83a9763e29ed7a21c8a43f7a62cd0a6bf74692 |
| https://git.kernel.org/stable/c/ff85a1dbd90d29f73033177ff8d8de4a27d9721c |
| https://git.kernel.org/stable/c/557e85ff9afef6d45020b6f09357111d38033c31 |
| https://git.kernel.org/stable/c/72009139a661ade5cb1da4239734ed02fa1cfff0 |
| https://git.kernel.org/stable/c/2c129e868992621a739bdd57a5bffa3985ef1b91 |
| https://git.kernel.org/stable/c/1c38cdc747f00daf7394535eae5afc4c503c59bb |
| https://git.kernel.org/stable/c/df9d44b645b83fffccfb4e28c1f93376585fdec8 |
