Bug 2347775 (CVE-2022-49429) - CVE-2022-49429 kernel: RDMA/hfi1: Prevent panic when SDMA is disabled
Summary: CVE-2022-49429 kernel: RDMA/hfi1: Prevent panic when SDMA is disabled
Keywords:
Status: NEW
Alias: CVE-2022-49429
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: 2025-02-26 03:06 UTC by OSIDB Bzimport
Modified: 2025-04-29 12:47 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
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Description OSIDB Bzimport 2025-02-26 03:06:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

RDMA/hfi1: Prevent panic when SDMA is disabled

If the hfi1 module is loaded with HFI1_CAP_SDMA off, a call to
hfi1_write_iter() will dereference a NULL pointer and panic. A typical
stack frame is:

  sdma_select_user_engine [hfi1]
  hfi1_user_sdma_process_request [hfi1]
  hfi1_write_iter [hfi1]
  do_iter_readv_writev
  do_iter_write
  vfs_writev
  do_writev
  do_syscall_64

The fix is to test for SDMA in hfi1_write_iter() and fail the I/O with
EINVAL.
Comment 1 Avinash Hanwate 2025-02-26 11:04:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022655-CVE-2022-49429-c9a7@gregkh/T
Comment 3 Avinash Hanwate 2025-02-26 15:32:47 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022655-CVE-2022-49429-c9a7@gregkh/T
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