| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49927: nfs4: Fix kmemleak when allocate slot failed |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nfs4: Fix kmemleak when allocate slot failed |
| |
| If one of the slot allocate failed, should cleanup all the other |
| allocated slots, otherwise, the allocated slots will leak: |
| |
| unreferenced object 0xffff8881115aa100 (size 64): |
| comm ""mount.nfs"", pid 679, jiffies 4294744957 (age 115.037s) |
| hex dump (first 32 bytes): |
| 00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff ...s......Z..... |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| backtrace: |
| [<000000007a4c434a>] nfs4_find_or_create_slot+0x8e/0x130 |
| [<000000005472a39c>] nfs4_realloc_slot_table+0x23f/0x270 |
| [<00000000cd8ca0eb>] nfs40_init_client+0x4a/0x90 |
| [<00000000128486db>] nfs4_init_client+0xce/0x270 |
| [<000000008d2cacad>] nfs4_set_client+0x1a2/0x2b0 |
| [<000000000e593b52>] nfs4_create_server+0x300/0x5f0 |
| [<00000000e4425dd2>] nfs4_try_get_tree+0x65/0x110 |
| [<00000000d3a6176f>] vfs_get_tree+0x41/0xf0 |
| [<0000000016b5ad4c>] path_mount+0x9b3/0xdd0 |
| [<00000000494cae71>] __x64_sys_mount+0x190/0x1d0 |
| [<000000005d56bdec>] do_syscall_64+0x35/0x80 |
| [<00000000687c9ae4>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 |
| |
| The Linux kernel CVE team has assigned CVE-2022-49927 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 4.9.333 with commit 84b5cb476903003ae9ca88f32b57ff0eaefa6d4c |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 4.14.299 with commit aae35a0c8a775fa4afa6a4e7dab3f936f1f89bbb |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 4.19.265 with commit 86ce0e93cf6fb4d0c447323ac66577c642628b9d |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 5.4.224 with commit 925cb538bd5851154602818dc80bf4b4d924c127 |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 5.10.154 with commit 45aea4fbf61e205649c29200726b9f45c1718a67 |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 5.15.78 with commit 24641993a7dce6b1628645f4e1d97ca06c9f765d |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 6.0.8 with commit db333ae981fb8843c383aa7dbf62cc682597d401 |
| Issue introduced in 3.12 with commit abf79bb341bf52f75f295b850abdf5f78f584311 and fixed in 6.1 with commit 7e8436728e22181c3f12a5dbabd35ed3a8b8c593 |
| |
| 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-2022-49927 |
| 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/nfs/nfs4client.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/84b5cb476903003ae9ca88f32b57ff0eaefa6d4c |
| https://git.kernel.org/stable/c/aae35a0c8a775fa4afa6a4e7dab3f936f1f89bbb |
| https://git.kernel.org/stable/c/86ce0e93cf6fb4d0c447323ac66577c642628b9d |
| https://git.kernel.org/stable/c/925cb538bd5851154602818dc80bf4b4d924c127 |
| https://git.kernel.org/stable/c/45aea4fbf61e205649c29200726b9f45c1718a67 |
| https://git.kernel.org/stable/c/24641993a7dce6b1628645f4e1d97ca06c9f765d |
| https://git.kernel.org/stable/c/db333ae981fb8843c383aa7dbf62cc682597d401 |
| https://git.kernel.org/stable/c/7e8436728e22181c3f12a5dbabd35ed3a8b8c593 |
