CVE-2024-50297

net: xilinx: axienet: Enqueue Tx packets in dql before dmaengine starts

State: Published
Severity: 7.5 High
Published: Nov 19, 2024
Updated: Aug 5, 2026
Reserved: Oct 21, 2024

Description

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

net: xilinx: axienet: Enqueue Tx packets in dql before dmaengine starts

Enqueue packets in dql after dma engine starts causes race condition. Tx transfer starts once dma engine is started and may execute dql dequeue in completion before it gets queued. It results in following kernel crash while running iperf stress test:

kernel BUG at lib/dynamic_queue_limits.c:99! <snip> Internal error: Oops - BUG: 00000000f2000800 [#1] SMP pc : dql_completed+0x238/0x248 lr : dql_completed+0x3c/0x248

Call trace: dql_completed+0x238/0x248 axienet_dma_tx_cb+0xa0/0x170 xilinx_dma_do_tasklet+0xdc/0x290 tasklet_action_common+0xf8/0x11c tasklet_action+0x30/0x3c handle_softirqs+0xf8/0x230 <snip>

Start dmaengine after enqueue in dql fixes the crash.

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
3.1	4.7 Medium	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
LinuxLinux	6a91b846af85a24241decd686269e8e038eb13d1 to before def3dee25cbd1c9b2ed443c3f6180e952563de77Affected 6a91b846af85a24241decd686269e8e038eb13d1 to before 5ccdcdf186aec6b9111845fd37e1757e9b413e2fAffected
LinuxLinux	6.8Affected before 6.8Not affected 6.11.8 through 6.11.*Not affected 6.12 and laterNot affected

References

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