CVE-2022-49931

Summary

In the Linux kernel, the following vulnerability has been resolved:

IB/hfi1: Correctly move list in sc_disable()

Commit 13bac861952a ("IB/hfi1: Fix abba locking issue with sc_disable()") incorrectly tries to move a list from one list head to another. The result is a kernel crash.

The crash is triggered when a link goes down and there are waiters for a send to complete. The following signature is seen:

BUG: kernel NULL pointer dereference, address: 0000000000000030 […] Call Trace: sc_disable+0x1ba/0x240 [hfi1] pio_freeze+0x3d/0x60 [hfi1] handle_freeze+0x27/0x1b0 [hfi1] process_one_work+0x1b0/0x380 ? process_one_work+0x380/0x380 worker_thread+0x30/0x360 ? process_one_work+0x380/0x380 kthread+0xd7/0x100 ? kthread_complete_and_exit+0x20/0x20 ret_from_fork+0x1f/0x30

The fix is to use the correct call to move the list.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd997d4e4365f7e59cf6b59c70f966c56d704b64f < 25760a41e3802f54aadcc31385543665ab349b8eaffected
LinuxLinuxd98883f6c33e0d960afedcecaa92fc2b61fec383 < 7c4260f8f188df32414a5ecad63e8b934c2aa3f0affected
LinuxLinux13bac861952a78664907a0f927d3e874e9a59034 < ba95409d6b580501ff6d78efd00064f7df669926affected
LinuxLinux13bac861952a78664907a0f927d3e874e9a59034 < b8bcff99b07cc175a6ee12a52db51cdd2229586caffected
LinuxLinux13bac861952a78664907a0f927d3e874e9a59034 < 1afac08b39d85437187bb2a92d89a741b1078f55affected
LinuxLinux5d33bd6b4d4d035e42733592899918a18f2540daaffected
LinuxLinux5.4.157 < 5.4.224affected
LinuxLinux5.10.77 < 5.10.154affected
LinuxLinux5.14.16 < 5.15affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.4.224 <= 5.4.*unaffected
LinuxLinux5.10.154 <= 5.10.*unaffected
LinuxLinux5.15.78 <= 5.15.*unaffected
LinuxLinux6.0.8 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References