CVE-2023-54318

net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add

State: Published
Severity: 8.8 High
Published: Dec 30, 2025
Updated: Oct 15, 2026
Reserved: Dec 30, 2025

Description

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

net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add

While doing smcr_port_add, there maybe linkgroup add into or delete from smc_lgr_list.list at the same time, which may result kernel crash. So, use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add.

The crash calltrace show below: BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: 0000 [#1] SMP NOPTI CPU: 0 PID: 559726 Comm: kworker/0:92 Kdump: loaded Tainted: G Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 449e491 04/01/2014 Workqueue: events smc_ib_port_event_work [smc] RIP: 0010:smcr_port_add+0xa6/0xf0 [smc] RSP: 0000:ffffa5a2c8f67de0 EFLAGS: 00010297 RAX: 0000000000000001 RBX: ffff9935e0650000 RCX: 0000000000000000 RDX: 0000000000000010 RSI: ffff9935e0654290 RDI: ffff9935c8560000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff9934c0401918 R10: 0000000000000000 R11: ffffffffb4a5c278 R12: ffff99364029aae4 R13: ffff99364029aa00 R14: 00000000ffffffed R15: ffff99364029ab08 FS: 0000000000000000(0000) GS:ffff994380600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000f06a10003 CR4: 0000000002770ef0 PKRU: 55555554 Call Trace: smc_ib_port_event_work+0x18f/0x380 [smc] process_one_work+0x19b/0x340 worker_thread+0x30/0x370 ? process_one_work+0x340/0x340 kthread+0x114/0x130 ? __kthread_cancel_work+0x50/0x50 ret_from_fork+0x1f/0x30

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1f90a05d9ff907c70456e7c9d7058372679a88c6 to before d1c6c93c27a4bf48006ab16cd9b38d85559d7645Affected 1f90a05d9ff907c70456e7c9d7058372679a88c6 to before 06b4934ab2b534bb92935c7601852066ebb9eab8Affected 1f90a05d9ff907c70456e7c9d7058372679a88c6 to before 70c8d17007dc4a07156b7da44509527990e569b3Affected 1f90a05d9ff907c70456e7c9d7058372679a88c6 to before b717463610a27fc0b58484cfead7a623d5913e61Affected 1f90a05d9ff907c70456e7c9d7058372679a88c6 to before f5146e3ef0a9eea405874b36178c19a4863b8989Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.195 through 5.10.Not affected 5.15.132 through 5.15.Not affected 6.1.54 through 6.1.Not affected 6.5.4 through 6.5.Not affected 6.6 and laterNot affected

Product

Versions

LinuxLinux

1f90a05d9ff907c70456e7c9d7058372679a88c6 to before d1c6c93c27a4bf48006ab16cd9b38d85559d7645Affected
1f90a05d9ff907c70456e7c9d7058372679a88c6 to before 06b4934ab2b534bb92935c7601852066ebb9eab8Affected
1f90a05d9ff907c70456e7c9d7058372679a88c6 to before 70c8d17007dc4a07156b7da44509527990e569b3Affected
1f90a05d9ff907c70456e7c9d7058372679a88c6 to before b717463610a27fc0b58484cfead7a623d5913e61Affected
1f90a05d9ff907c70456e7c9d7058372679a88c6 to before f5146e3ef0a9eea405874b36178c19a4863b8989Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.195 through 5.10.*Not affected
5.15.132 through 5.15.*Not affected
6.1.54 through 6.1.*Not affected
6.5.4 through 6.5.*Not affected
6.6 and laterNot affected

References

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