cbcvebase.
CVE-2024-26627
published 2024-03-06

CVE-2024-26627: 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…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.4th percentile
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 (N*M - 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]

Affected

19 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.82-1 (bookworm)linux 6.1.82-1 (bookworm)
linuxlinux
linuxlinux>= 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < f5944853f7a961fedc1227dc8f60393f8936d37cf5944853f7a961fedc1227dc8f60393f8936d37c
linuxlinux>= 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < d37c1c81419fdef66ebd0747cf76fb8b7d979059d37c1c81419fdef66ebd0747cf76fb8b7d979059
linuxlinux>= 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < db6338f45971b4285ea368432a84033690eaf53cdb6338f45971b4285ea368432a84033690eaf53c
linuxlinux>= 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 65ead8468c21c2676d4d06f50b46beffdea69df165ead8468c21c2676d4d06f50b46beffdea69df1
linuxlinux>= 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 07e3ca0f17f579491b5f54e9ed05173d6c1d6fcb07e3ca0f17f579491b5f54e9ed05173d6c1d6fcb
linuxlinux>= 6eb045e092efefafc6687409a6fa6d1dabf0fb69 < 4373534a9850627a2695317944898eb1283a2db04373534a9850627a2695317944898eb1283a2db0
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.82-16.1.82-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 5.15.0-106.1165.15.0-106.116
linuxlinux_kernel>= 5.11 < 5.15.1495.15.149
linuxlinux_kernel>= 5.16 < 6.1.776.1.77
linuxlinux_kernel>= 5.5 < 5.10.2105.10.210
linuxlinux_kernel>= 6.2 < 6.6.166.6.16
linuxlinux_kernel>= 6.7 < 6.7.46.7.4

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_ubuntu7.5HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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