阿里云漏洞库

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5: Fix a race on command flush flow

Fix a refcount use after free warning due to a race on command entry.

Such race occurs when one of the commands releases its last refcount and

frees its index and entry while another process running command flush

flow takes refcount to this command entry. The process which handles

commands flush may see this command as needed to be flushed if the other

process released its refcount but didn't release the index yet. Fix it

by adding the needed spin lock.

It fixes the following warning trace:

refcount_t: addition on 0; use-after-free.

WARNING: CPU: 11 PID: 540311 at lib/refcount.c:25 refcount_warn_saturate+0x80/0xe0

...

RIP: 0010:refcount_warn_saturate+0x80/0xe0

...

Call Trace:

<TASK>

mlx5_cmd_trigger_completions+0x293/0x340 [mlx5_core]

mlx5_cmd_flush+0x3a/0xf0 [mlx5_core]

enter_error_state+0x44/0x80 [mlx5_core]

mlx5_fw_fatal_reporter_err_work+0x37/0xe0 [mlx5_core]

process_one_work+0x1be/0x390

worker_thread+0x4d/0x3d0

? rescuer_thread+0x350/0x350

kthread+0x141/0x160

? set_kthread_struct+0x40/0x40

ret_from_fork+0x1f/0x30

</TASK>

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://access.redhat.com/security/cve/CVE-2022-48858
https://git.kernel.org/stable/c/0401bfb27a91d7bdd74b1635c1aae57cbb128da6
https://git.kernel.org/stable/c/063bd355595428750803d8736a9bb7c8db67d42d
https://git.kernel.org/stable/c/1a4017926eeea56c7540cc41b42106746ee8a0ee
https://git.kernel.org/stable/c/7c519f769f555ff7d9d4ccba3497bbb589df360a
https://git.kernel.org/stable/c/f3331bc17449f15832c31823f27573f4c0e13e5f
https://lore.kernel.org/linux-cve-announce/2024071627-CVE-2022-48858-5d3f@gregkh/T