| 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-2022-49469: btrfs: fix anon_dev leak in create_subvol() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| btrfs: fix anon_dev leak in create_subvol() |
| |
| When btrfs_qgroup_inherit(), btrfs_alloc_tree_block, or |
| btrfs_insert_root() fail in create_subvol(), we return without freeing |
| anon_dev. Reorganize the error handling in create_subvol() to fix this. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49469 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.17.14 with commit d887b3de318834f9aa637ecf79c6bc66cba7c69a |
| Fixed in 5.18.3 with commit 7a875ad8706f0903a0e812e0dd701956ee9826ff |
| Fixed in 5.19 with commit 2256e901f5bddc56e24089c96f27b77da932dfcc |
| |
| 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-2022-49469 |
| 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/ioctl.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/d887b3de318834f9aa637ecf79c6bc66cba7c69a |
| https://git.kernel.org/stable/c/7a875ad8706f0903a0e812e0dd701956ee9826ff |
| https://git.kernel.org/stable/c/2256e901f5bddc56e24089c96f27b77da932dfcc |
