Bug 2363406 (CVE-2022-49931) - CVE-2022-49931 kernel: IB/hfi1: Correctly move list in sc_disable()
Summary: CVE-2022-49931 kernel: IB/hfi1: Correctly move list in sc_disable()
Keywords:
Status: NEW
Alias: CVE-2022-49931
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-01 15:03 UTC by OSIDB Bzimport
Modified: 2025-06-06 01:14 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2025-05-01 15:03:26 UTC 
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.
Comment 1 Avinash Hanwate 2025-05-02 03:37:27 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050112-CVE-2022-49931-9e35@gregkh/T
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