CVE-2024-57795 Information

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: \nBUG: 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: __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 \n 1). In the link [1]

\n infiniband syz2: set down \n This means that on 839.350575 the event ib_cache_event_task was sent andi queued in ib_wq.

2). In the link [1]

\n team0 (unregistering): Port device team_slave_0 removed \n It indicates that before 843.251853 the net device should be freed.

3). In the link [1]

\n BUG: KASAN: slab-use-after-free in dev_get_flags+0x188/0x1d0 \n 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

Reference

https://git.kernel.org/stable/c/2ac5415022d16d63d912a39a06f32f1f51140261 https://git.kernel.org/stable/c/9f6f54e6a6863131442b40e14d1792b090c7ce21