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Ubuntu: (Multiple Advisories) (CVE-2024-26627): Linux kernel (OEM) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2024-26627): Linux kernel (OEM) vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/06/2024
Created
03/13/2024
Added
03/12/2024
Modified
06/06/2024

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 (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]

Solution(s)

  • ubuntu-upgrade-linux-image-5-15-0-1044-gkeop
  • ubuntu-upgrade-linux-image-5-15-0-1054-ibm
  • ubuntu-upgrade-linux-image-5-15-0-1054-nvidia
  • ubuntu-upgrade-linux-image-5-15-0-1054-nvidia-lowlatency
  • ubuntu-upgrade-linux-image-5-15-0-1054-raspi
  • ubuntu-upgrade-linux-image-5-15-0-1057-intel-iotg
  • ubuntu-upgrade-linux-image-5-15-0-1058-gke
  • ubuntu-upgrade-linux-image-5-15-0-1058-kvm
  • ubuntu-upgrade-linux-image-5-15-0-1059-gcp
  • ubuntu-upgrade-linux-image-5-15-0-1059-oracle
  • ubuntu-upgrade-linux-image-5-15-0-106-generic
  • ubuntu-upgrade-linux-image-5-15-0-106-generic-64k
  • ubuntu-upgrade-linux-image-5-15-0-106-generic-lpae
  • ubuntu-upgrade-linux-image-5-15-0-106-lowlatency
  • ubuntu-upgrade-linux-image-5-15-0-106-lowlatency-64k
  • ubuntu-upgrade-linux-image-5-15-0-1061-aws
  • ubuntu-upgrade-linux-image-5-15-0-1063-azure
  • ubuntu-upgrade-linux-image-5-15-0-1063-azure-fde
  • ubuntu-upgrade-linux-image-6-1-0-1035-oem
  • ubuntu-upgrade-linux-image-6-5-0-1022-oem
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-lts-22-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-cvm
  • ubuntu-upgrade-linux-image-azure-fde
  • ubuntu-upgrade-linux-image-azure-fde-lts-22-04
  • ubuntu-upgrade-linux-image-azure-lts-22-04
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-22-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-15
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-5-15
  • ubuntu-upgrade-linux-image-ibm
  • ubuntu-upgrade-linux-image-intel-iotg
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-64k
  • ubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-nvidia
  • ubuntu-upgrade-linux-image-nvidia-lowlatency
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-20-04c
  • ubuntu-upgrade-linux-image-oem-20-04d
  • ubuntu-upgrade-linux-image-oem-22-04
  • ubuntu-upgrade-linux-image-oem-22-04a
  • ubuntu-upgrade-linux-image-oem-22-04b
  • ubuntu-upgrade-linux-image-oem-22-04c
  • ubuntu-upgrade-linux-image-oem-22-04d
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-22-04
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04

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