| 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-2024-57795: RDMA/rxe: Remove the direct link to net_device |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/rxe: Remove the direct link to net_device |
| |
| The similar patch in siw is in the link: |
| https://git.kernel.org/rdma/rdma/c/16b87037b48889 |
| |
| This problem also occurred in RXE. The following analyze this problem. |
| In the following Call Traces: |
| " |
| BUG: KASAN: slab-use-after-free in dev_get_flags+0x188/0x1d0 net/core/dev.c:8782 |
| Read of size 4 at addr ffff8880554640b0 by task kworker/1:4/5295 |
| |
| CPU: 1 UID: 0 PID: 5295 Comm: kworker/1:4 Not tainted |
| 6.12.0-rc3-syzkaller-00399-g9197b73fd7bb #0 |
| Hardware name: Google Compute Engine/Google Compute Engine, |
| BIOS Google 09/13/2024 |
| Workqueue: infiniband ib_cache_event_task |
| Call Trace: |
| <TASK> |
| __dump_stack lib/dump_stack.c:94 [inline] |
| dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 |
| print_address_description mm/kasan/report.c:377 [inline] |
| print_report+0x169/0x550 mm/kasan/report.c:488 |
| kasan_report+0x143/0x180 mm/kasan/report.c:601 |
| dev_get_flags+0x188/0x1d0 net/core/dev.c:8782 |
| rxe_query_port+0x12d/0x260 drivers/infiniband/sw/rxe/rxe_verbs.c:60 |
| __ib_query_port drivers/infiniband/core/device.c:2111 [inline] |
| ib_query_port+0x168/0x7d0 drivers/infiniband/core/device.c:2143 |
| ib_cache_update+0x1a9/0xb80 drivers/infiniband/core/cache.c:1494 |
| ib_cache_event_task+0xf3/0x1e0 drivers/infiniband/core/cache.c:1568 |
| process_one_work kernel/workqueue.c:3229 [inline] |
| process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310 |
| worker_thread+0x870/0xd30 kernel/workqueue.c:3391 |
| kthread+0x2f2/0x390 kernel/kthread.c:389 |
| ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 |
| ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 |
| </TASK> |
| " |
| |
| 1). In the link [1], |
| |
| " |
| infiniband syz2: set down |
| " |
| |
| This means that on 839.350575, the event ib_cache_event_task was sent andi |
| queued in ib_wq. |
| |
| 2). In the link [1], |
| |
| " |
| team0 (unregistering): Port device team_slave_0 removed |
| " |
| |
| It indicates that before 843.251853, the net device should be freed. |
| |
| 3). In the link [1], |
| |
| " |
| BUG: KASAN: slab-use-after-free in dev_get_flags+0x188/0x1d0 |
| " |
| |
| This means that on 850.559070, this slab-use-after-free problem occurred. |
| |
| In all, on 839.350575, the event ib_cache_event_task was sent and queued |
| in ib_wq, |
| |
| before 843.251853, the net device veth was freed. |
| |
| on 850.559070, this event was executed, and the mentioned freed net device |
| was called. Thus, the above call trace occurred. |
| |
| [1] https://syzkaller.appspot.com/x/log.txt?x=12e7025f980000 |
| |
| The Linux kernel CVE team has assigned CVE-2024-57795 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.12.9 with commit 9f6f54e6a6863131442b40e14d1792b090c7ce21 |
| Issue introduced in 4.8 with commit 8700e3e7c4857d28ebaa824509934556da0b3e76 and fixed in 6.13 with commit 2ac5415022d16d63d912a39a06f32f1f51140261 |
| |
| 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-2024-57795 |
| 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/sw/rxe/rxe.c |
| drivers/infiniband/sw/rxe/rxe.h |
| drivers/infiniband/sw/rxe/rxe_mcast.c |
| drivers/infiniband/sw/rxe/rxe_net.c |
| drivers/infiniband/sw/rxe/rxe_verbs.c |
| drivers/infiniband/sw/rxe/rxe_verbs.h |
| |
| |
| 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/9f6f54e6a6863131442b40e14d1792b090c7ce21 |
| https://git.kernel.org/stable/c/2ac5415022d16d63d912a39a06f32f1f51140261 |
