// For flags

CVE-2024-35959

net/mlx5e: Fix mlx5e_priv_init() cleanup flow

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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

net/mlx5e: Fix mlx5e_priv_init() cleanup flow

When mlx5e_priv_init() fails, the cleanup flow calls mlx5e_selq_cleanup which
calls mlx5e_selq_apply() that assures that the `priv->state_lock` is held using
lockdep_is_held().

Acquire the state_lock in mlx5e_selq_cleanup().

Kernel log:
=============================
WARNING: suspicious RCU usage
6.8.0-rc3_net_next_841a9b5 #1 Not tainted
-----------------------------
drivers/net/ethernet/mellanox/mlx5/core/en/selq.c:124 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:

rcu_scheduler_active = 2, debug_locks = 1
2 locks held by systemd-modules/293:
#0: ffffffffa05067b0 (devices_rwsem){++++}-{3:3}, at: ib_register_client+0x109/0x1b0 [ib_core]
#1: ffff8881096c65c0 (&device->client_data_rwsem){++++}-{3:3}, at: add_client_context+0x104/0x1c0 [ib_core]

stack backtrace:
CPU: 4 PID: 293 Comm: systemd-modules Not tainted 6.8.0-rc3_net_next_841a9b5 #1
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x8a/0xa0
lockdep_rcu_suspicious+0x154/0x1a0
mlx5e_selq_apply+0x94/0xa0 [mlx5_core]
mlx5e_selq_cleanup+0x3a/0x60 [mlx5_core]
mlx5e_priv_init+0x2be/0x2f0 [mlx5_core]
mlx5_rdma_setup_rn+0x7c/0x1a0 [mlx5_core]
rdma_init_netdev+0x4e/0x80 [ib_core]
? mlx5_rdma_netdev_free+0x70/0x70 [mlx5_core]
ipoib_intf_init+0x64/0x550 [ib_ipoib]
ipoib_intf_alloc+0x4e/0xc0 [ib_ipoib]
ipoib_add_one+0xb0/0x360 [ib_ipoib]
add_client_context+0x112/0x1c0 [ib_core]
ib_register_client+0x166/0x1b0 [ib_core]
? 0xffffffffa0573000
ipoib_init_module+0xeb/0x1a0 [ib_ipoib]
do_one_initcall+0x61/0x250
do_init_module+0x8a/0x270
init_module_from_file+0x8b/0xd0
idempotent_init_module+0x17d/0x230
__x64_sys_finit_module+0x61/0xb0
do_syscall_64+0x71/0x140
entry_SYSCALL_64_after_hwframe+0x46/0x4e
</TASK>

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net/mlx5e: corrige el flujo de limpieza de mlx5e_priv_init(). Cuando falla mlx5e_priv_init(), el flujo de limpieza llama a mlx5e_selq_cleanup, que llama a mlx5e_selq_apply() y garantiza que se mantenga `priv-&gt;state_lock`. usando lockdep_is_held(). Adquiera state_lock en mlx5e_selq_cleanup(). Registro del kernel: ============================= ADVERTENCIA: uso sospechoso de RCU 6.8.0-rc3_net_next_841a9b5 #1 No contaminado ---- ------------------------- drivers/net/ethernet/mellanox/mlx5/core/en/selq.c:124 ¡Uso sospechoso de rcu_dereference_protected()! otra información que podría ayudarnos a depurar esto: rcu_scheduler_active = 2, debug_locks = 1 2 bloqueos mantenidos por systemd-modules/293: #0: ffffffffa05067b0 (devices_rwsem){++++}-{3:3}, en: ib_register_client+ 0x109/0x1b0 [ib_core] #1: ffff8881096c65c0 (&amp;device-&gt;client_data_rwsem){++++}-{3:3}, en: add_client_context+0x104/0x1c0 [ib_core] seguimiento de pila: CPU: 4 PID: 293 Comunicaciones: systemd-modules No está contaminado 6.8.0-rc3_net_next_841a9b5 #1 Nombre del hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 01/04/2014 Seguimiento de llamadas: dump_stack_lvl+0x8a/0xa0 lockdep_rcu_suspicious+0x154/0x1a0 mlx5e_selq_apply+0x94/0xa0 [mlx5_core] mlx5e_selq_cleanup+0x3a/0x60 [mlx5_core] mlx5e_priv_init+0x2be/0x2f0 [mlx5_ núcleo] mlx5_rdma_setup_rn+0x7c/0x1a0 [mlx5_core] rdma_init_netdev+0x4e/0x80 [ib_core] ? mlx5_rdma_netdev_free+0x70/0x70 [mlx5_core] ipoib_intf_init+0x64/0x550 [ib_ipoib] ipoib_intf_alloc+0x4e/0xc0 [ib_ipoib] ipoib_add_one+0xb0/0x360 [ib_ipoib] add_client_context+0x112/0 x1c0 [ib_core] ib_register_client+0x166/0x1b0 [ib_core]? 0xffffffffa0573000 ipoib_init_module+0xeb/0x1a0 [ib_ipoib] do_one_initcall+0x61/0x250 do_init_module+0x8a/0x270 init_module_from_file+0x8b/0xd0 idempotent_init_module+0x17d/0x230 sys_finit_module+0x61/0xb0 do_syscall_64+0x71/0x140 Entry_SYSCALL_64_after_hwframe+0x46/0x4e

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-17 CVE Reserved
  • 2024-05-20 CVE Published
  • 2024-05-21 EPSS Updated
  • 2024-09-11 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.18 < 6.1.87
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.18 < 6.1.87"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.18 < 6.6.28
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.18 < 6.6.28"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.18 < 6.8.7
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.18 < 6.8.7"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.18 < 6.9
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.18 < 6.9"
en
Affected