| 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-2022-49033: btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit() |
| |
| Syzkaller reported BUG as follows: |
| |
| BUG: sleeping function called from invalid context at |
| include/linux/sched/mm.h:274 |
| Call Trace: |
| <TASK> |
| dump_stack_lvl+0xcd/0x134 |
| __might_resched.cold+0x222/0x26b |
| kmem_cache_alloc+0x2e7/0x3c0 |
| update_qgroup_limit_item+0xe1/0x390 |
| btrfs_qgroup_inherit+0x147b/0x1ee0 |
| create_subvol+0x4eb/0x1710 |
| btrfs_mksubvol+0xfe5/0x13f0 |
| __btrfs_ioctl_snap_create+0x2b0/0x430 |
| btrfs_ioctl_snap_create_v2+0x25a/0x520 |
| btrfs_ioctl+0x2a1c/0x5ce0 |
| __x64_sys_ioctl+0x193/0x200 |
| do_syscall_64+0x35/0x80 |
| |
| Fix this by calling qgroup_dirty() on @dstqgroup, and update limit item in |
| btrfs_run_qgroups() later outside of the spinlock context. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49033 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.335 with commit 89840b12c8fad7200eb6478525c13261512c01be |
| Fixed in 4.14.301 with commit 3c98e91be6aea4c7acf09da6eb0c107ea9186bb5 |
| Fixed in 4.19.268 with commit f4b930a1602b05e77fee31f9616599b25e910a86 |
| Fixed in 5.4.226 with commit 8eb912af525042a7365295eb62f6d5270c2a6462 |
| Fixed in 5.10.158 with commit 01d7c41eac9129fba80d8aed0060caab4a7dbe09 |
| Fixed in 5.15.82 with commit 044da1a371a0da579e805e89c96865f62d8f6f69 |
| Fixed in 6.0.12 with commit 588ae4fdd8b11788a797776b10d6c44ae12bc133 |
| Fixed in 6.1 with commit f7e942b5bb35d8e3af54053d19a6bf04143a3955 |
| |
| 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-2022-49033 |
| 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/btrfs/qgroup.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/89840b12c8fad7200eb6478525c13261512c01be |
| https://git.kernel.org/stable/c/3c98e91be6aea4c7acf09da6eb0c107ea9186bb5 |
| https://git.kernel.org/stable/c/f4b930a1602b05e77fee31f9616599b25e910a86 |
| https://git.kernel.org/stable/c/8eb912af525042a7365295eb62f6d5270c2a6462 |
| https://git.kernel.org/stable/c/01d7c41eac9129fba80d8aed0060caab4a7dbe09 |
| https://git.kernel.org/stable/c/044da1a371a0da579e805e89c96865f62d8f6f69 |
| https://git.kernel.org/stable/c/588ae4fdd8b11788a797776b10d6c44ae12bc133 |
| https://git.kernel.org/stable/c/f7e942b5bb35d8e3af54053d19a6bf04143a3955 |
