| 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-2022-48692: RDMA/srp: Set scmnd->result only when scmnd is not NULL |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/srp: Set scmnd->result only when scmnd is not NULL |
| |
| This change fixes the following kernel NULL pointer dereference |
| which is reproduced by blktests srp/007 occasionally. |
| |
| BUG: kernel NULL pointer dereference, address: 0000000000000170 |
| PGD 0 P4D 0 |
| Oops: 0002 [#1] PREEMPT SMP NOPTI |
| CPU: 0 PID: 9 Comm: kworker/0:1H Kdump: loaded Not tainted 6.0.0-rc1+ #37 |
| Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-29-g6a62e0cb0dfe-prebuilt.qemu.org 04/01/2014 |
| Workqueue: 0x0 (kblockd) |
| RIP: 0010:srp_recv_done+0x176/0x500 [ib_srp] |
| Code: 00 4d 85 ff 0f 84 52 02 00 00 48 c7 82 80 02 00 00 00 00 00 00 4c 89 df 4c 89 14 24 e8 53 d3 4a f6 4c 8b 14 24 41 0f b6 42 13 <41> 89 87 70 01 00 00 41 0f b6 52 12 f6 c2 02 74 44 41 8b 42 1c b9 |
| RSP: 0018:ffffaef7c0003e28 EFLAGS: 00000282 |
| RAX: 0000000000000000 RBX: ffff9bc9486dea60 RCX: 0000000000000000 |
| RDX: 0000000000000102 RSI: ffffffffb76bbd0e RDI: 00000000ffffffff |
| RBP: ffff9bc980099a00 R08: 0000000000000001 R09: 0000000000000001 |
| R10: ffff9bca53ef0000 R11: ffff9bc980099a10 R12: ffff9bc956e14000 |
| R13: ffff9bc9836b9cb0 R14: ffff9bc9557b4480 R15: 0000000000000000 |
| FS: 0000000000000000(0000) GS:ffff9bc97ec00000(0000) knlGS:0000000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 0000000000000170 CR3: 0000000007e04000 CR4: 00000000000006f0 |
| Call Trace: |
| <IRQ> |
| __ib_process_cq+0xb7/0x280 [ib_core] |
| ib_poll_handler+0x2b/0x130 [ib_core] |
| irq_poll_softirq+0x93/0x150 |
| __do_softirq+0xee/0x4b8 |
| irq_exit_rcu+0xf7/0x130 |
| sysvec_apic_timer_interrupt+0x8e/0xc0 |
| </IRQ> |
| |
| The Linux kernel CVE team has assigned CVE-2022-48692 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.14 with commit ad215aaea4f9d637f441566cdbbc610e9849e1fa and fixed in 5.15.68 with commit a8edd49c94b4b08019ed7d6dd794fca8078a4deb |
| Issue introduced in 5.14 with commit ad215aaea4f9d637f441566cdbbc610e9849e1fa and fixed in 5.19.9 with commit f2c70f56f762e5dc3b0d7dc438fbb137cb116413 |
| Issue introduced in 5.14 with commit ad215aaea4f9d637f441566cdbbc610e9849e1fa and fixed in 6.0 with commit 12f35199a2c0551187edbf8eb01379f0598659fa |
| |
| 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-2022-48692 |
| 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: |
| drivers/infiniband/ulp/srp/ib_srp.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/f022576aa03c2385ea7f2b27ee5b331e43abf624 |
| https://git.kernel.org/stable/c/a8edd49c94b4b08019ed7d6dd794fca8078a4deb |
| https://git.kernel.org/stable/c/f2c70f56f762e5dc3b0d7dc438fbb137cb116413 |
| https://git.kernel.org/stable/c/12f35199a2c0551187edbf8eb01379f0598659fa |
