CVE - CVE-2024-26627

CVE-ID
CVE-2024-26627	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: scsi: core: Move scsi_host_busy() out of host lock for waking up EH handler Inside scsi_eh_wakeup(), scsi_host_busy() is called & checked with host lock every time for deciding if error handler kthread needs to be waken up. This can be too heavy in case of recovery, such as: - N hardware queues - queue depth is M for each hardware queue - each scsi_host_busy() iterates over (N * M) tag/requests If recovery is triggered in case that all requests are in-flight, each scsi_eh_wakeup() is strictly serialized, when scsi_eh_wakeup() is called for the last in-flight request, scsi_host_busy() has been run for (N * M - 1) times, and request has been iterated for (NM - 1) (N * M) times. If both N and M are big enough, hard lockup can be triggered on acquiring host lock, and it is observed on mpi3mr(128 hw queues, queue depth 8169). Fix the issue by calling scsi_host_busy() outside the host lock. We don't need the host lock for getting busy count because host the lock never covers that. [mkp: Drop unnecessary 'busy' variables pointed out by Bart]
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/07e3ca0f17f579491b5f54e9ed05173d6c1d6fcb URL:https://git.kernel.org/stable/c/07e3ca0f17f579491b5f54e9ed05173d6c1d6fcb MISC:https://git.kernel.org/stable/c/4373534a9850627a2695317944898eb1283a2db0 URL:https://git.kernel.org/stable/c/4373534a9850627a2695317944898eb1283a2db0 MISC:https://git.kernel.org/stable/c/65ead8468c21c2676d4d06f50b46beffdea69df1 URL:https://git.kernel.org/stable/c/65ead8468c21c2676d4d06f50b46beffdea69df1 MISC:https://git.kernel.org/stable/c/d37c1c81419fdef66ebd0747cf76fb8b7d979059 URL:https://git.kernel.org/stable/c/d37c1c81419fdef66ebd0747cf76fb8b7d979059 MISC:https://git.kernel.org/stable/c/db6338f45971b4285ea368432a84033690eaf53c URL:https://git.kernel.org/stable/c/db6338f45971b4285ea368432a84033690eaf53c MISC:https://git.kernel.org/stable/c/f5944853f7a961fedc1227dc8f60393f8936d37c URL:https://git.kernel.org/stable/c/f5944853f7a961fedc1227dc8f60393f8936d37c
Assigning CNA
kernel.org
Date Record Created
20240219	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 (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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