CVE-2024-41036

net: ks8851: Fix deadlock with the SPI chip variant

State: Published
Severity: 7.5 High
Published: Jul 29, 2024
Updated: Aug 5, 2026
Reserved: Jul 12, 2024

Description

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

net: ks8851: Fix deadlock with the SPI chip variant

When SMP is enabled and spinlocks are actually functional then there is a deadlock with the 'statelock' spinlock between ks8851_start_xmit_spi and ks8851_irq:

watchdog: BUG: soft lockup - CPU#0 stuck for 27s! call trace: queued_spin_lock_slowpath+0x100/0x284 do_raw_spin_lock+0x34/0x44 ks8851_start_xmit_spi+0x30/0xb8 ks8851_start_xmit+0x14/0x20 netdev_start_xmit+0x40/0x6c dev_hard_start_xmit+0x6c/0xbc sch_direct_xmit+0xa4/0x22c __qdisc_run+0x138/0x3fc qdisc_run+0x24/0x3c net_tx_action+0xf8/0x130 handle_softirqs+0x1ac/0x1f0 __do_softirq+0x14/0x20 ____do_softirq+0x10/0x1c call_on_irq_stack+0x3c/0x58 do_softirq_own_stack+0x1c/0x28 __irq_exit_rcu+0x54/0x9c irq_exit_rcu+0x10/0x1c el1_interrupt+0x38/0x50 el1h_64_irq_handler+0x18/0x24 el1h_64_irq+0x64/0x68 __netif_schedule+0x6c/0x80 netif_tx_wake_queue+0x38/0x48 ks8851_irq+0xb8/0x2c8 irq_thread_fn+0x2c/0x74 irq_thread+0x10c/0x1b0 kthread+0xc8/0xd8 ret_from_fork+0x10/0x20

This issue has not been identified earlier because tests were done on a device with SMP disabled and so spinlocks were actually NOPs.

Now use spin_(un)lock_bh for TX queue related locking to avoid execution of softirq work synchronously that would lead to a deadlock.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1092525155eaad5c69ca9f3b6f3e7895a9424d66 to before a0c69c492f4a8fad52f0a97565241c926160c9a4Affected 30302b41ffdcd194bef27fb3b1a9f2ca53dedb27 to before 80ece00137300d74642f2038c8fe5440deaf9f05Affected 3dc5d44545453de1de9c53cc529cc960a85933da to before 10fec0cd0e8f56ff06c46bb24254c7d8f8f2bbf0Affected 3dc5d44545453de1de9c53cc529cc960a85933da to before 0913ec336a6c0c4a2b296bd9f74f8e41c4c83c8cAffected 786788bb1396ed5ea27e39c4933f59f4e52004e4Affected 7c25c5d7274631b655f0f9098a16241fcd5db57bAffected 6.1.70 to before 6.1.100Affected 6.6.9 to before 6.6.41Affected 5.10.206 to before 5.11Affected 5.15.146 to before 5.16Affected
LinuxLinux	6.7Affected before 6.7Not affected 6.1.100 through 6.1.Not affected 6.6.41 through 6.6.Not affected 6.9.10 through 6.9.*Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

1092525155eaad5c69ca9f3b6f3e7895a9424d66 to before a0c69c492f4a8fad52f0a97565241c926160c9a4Affected
30302b41ffdcd194bef27fb3b1a9f2ca53dedb27 to before 80ece00137300d74642f2038c8fe5440deaf9f05Affected
3dc5d44545453de1de9c53cc529cc960a85933da to before 10fec0cd0e8f56ff06c46bb24254c7d8f8f2bbf0Affected
3dc5d44545453de1de9c53cc529cc960a85933da to before 0913ec336a6c0c4a2b296bd9f74f8e41c4c83c8cAffected
786788bb1396ed5ea27e39c4933f59f4e52004e4Affected
7c25c5d7274631b655f0f9098a16241fcd5db57bAffected
6.1.70 to before 6.1.100Affected
6.6.9 to before 6.6.41Affected
5.10.206 to before 5.11Affected
5.15.146 to before 5.16Affected

LinuxLinux

6.7Affected
before 6.7Not affected
6.1.100 through 6.1.*Not affected
6.6.41 through 6.6.*Not affected
6.9.10 through 6.9.*Not affected
6.10 and laterNot affected

References

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