CVE-2024-27055
Assigner: Linux
Published: 2024-05-01T12:54:52.938Z
State: PUBLISHED
descriptions: value: In the Linux kernel, the following vulnerability has been resolved:

workqueue: Don't call cpumask_test_cpu() with -1 CPU in wq_update_node_max_active()

For wq_update_node_max_active(), @off_cpu of -1 indicates that no CPU is
going down. The function was incorrectly calling cpumask_test_cpu() with -1
CPU leading to oopses like the following on some archs:

  Unable to handle kernel paging request at virtual address ffff0002100296e0
  ..
  pc : wq_update_node_max_active+0x50/0x1fc
  lr : wq_update_node_max_active+0x1f0/0x1fc
  ...
  Call trace:
    wq_update_node_max_active+0x50/0x1fc
    apply_wqattrs_commit+0xf0/0x114
    apply_workqueue_attrs_locked+0x58/0xa0
    alloc_workqueue+0x5ac/0x774
    workqueue_init_early+0x460/0x540
    start_kernel+0x258/0x684
    __primary_switched+0xb8/0xc0
  Code: 9100a273 35000d01 53067f00 d0016dc1 (f8607a60)
  ---[ end trace 0000000000000000 ]---
  Kernel panic - not syncing: Attempted to kill the idle task!
  ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---

Fix it.
affected: product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions: version: 5a70baec2294
lessThan: 7df62b8cca38
status: affected
versionType: git
version: 5a70baec2294
lessThan: a75ac2693d73
status: affected
versionType: git
version: fc67aebe34f2
lessThan: 38c19c44cc05
status: affected
versionType: git
version: 843288afd3cc
lessThan: 9fc557d489f8
status: affected
versionType: git
version: 843288afd3cc
lessThan: adc646d21269
status: affected
versionType: git
version: 5797b1c18919
lessThan: 15930da42f89
status: affected
versionType: git
product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions: version: 6.6.23
lessThan: 6.6.25
status: affected
versionType: custom
version: 6.8.2
lessThan: 6.8.4
status: affected
versionType: custom
title: workqueue: Don't call cpumask_test_cpu() with -1 CPU in wq_update_node_max_active()
x_generator: engine: bippy-d175d3acf727