CVE - CVE-2024-53102

CVE-ID
CVE-2024-53102	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: nvme: make keep-alive synchronous operation The nvme keep-alive operation, which executes at a periodic interval, could potentially sneak in while shutting down a fabric controller. This may lead to a race between the fabric controller admin queue destroy code path (invoked while shutting down controller) and hw/hctx queue dispatcher called from the nvme keep-alive async request queuing operation. This race could lead to the kernel crash shown below: Call Trace: autoremove_wake_function+0x0/0xbc (unreliable) __blk_mq_sched_dispatch_requests+0x114/0x24c blk_mq_sched_dispatch_requests+0x44/0x84 blk_mq_run_hw_queue+0x140/0x220 nvme_keep_alive_work+0xc8/0x19c [nvme_core] process_one_work+0x200/0x4e0 worker_thread+0x340/0x504 kthread+0x138/0x140 start_kernel_thread+0x14/0x18 While shutting down fabric controller, if nvme keep-alive request sneaks in then it would be flushed off. The nvme_keep_alive_end_io function is then invoked to handle the end of the keep-alive operation which decrements the admin->q_usage_counter and assuming this is the last/only request in the admin queue then the admin->q_usage_counter becomes zero. If that happens then blk-mq destroy queue operation (blk_mq_destroy_ queue()) which could be potentially running simultaneously on another cpu (as this is the controller shutdown code path) would forward progress and deletes the admin queue. So, now from this point onward we are not supposed to access the admin queue resources. However the issue here's that the nvme keep-alive thread running hw/hctx queue dispatch operation hasn't yet finished its work and so it could still potentially access the admin queue resource while the admin queue had been already deleted and that causes the above crash. This fix helps avoid the observed crash by implementing keep-alive as a synchronous operation so that we decrement admin->q_usage_counter only after keep-alive command finished its execution and returns the command status back up to its caller (blk_execute_rq()). This would ensure that fabric shutdown code path doesn't destroy the fabric admin queue until keep-alive request finished execution and also keep-alive thread is not running hw/hctx queue dispatch operation.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1a1bcca5c9efd2c72c8d2fcbadf2d673cceb2ea7 URL:https://git.kernel.org/stable/c/1a1bcca5c9efd2c72c8d2fcbadf2d673cceb2ea7 MISC:https://git.kernel.org/stable/c/afa229465399f89d3af9d72ced865144c9748846 URL:https://git.kernel.org/stable/c/afa229465399f89d3af9d72ced865144c9748846 MISC:https://git.kernel.org/stable/c/ccc1d82dfaad0ad27d21139da22e57add73d2a5e URL:https://git.kernel.org/stable/c/ccc1d82dfaad0ad27d21139da22e57add73d2a5e MISC:https://git.kernel.org/stable/c/d06923670b5a5f609603d4a9fee4dec02d38de9c URL:https://git.kernel.org/stable/c/d06923670b5a5f609603d4a9fee4dec02d38de9c
Assigning CNA
kernel.org
Date Record Created
20241119	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241119)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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