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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2021-47179

NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return() Commit de144ff4234f changes _pnfs_return_layout() to call pnfs_mark_matching_lsegs_return() passing NULL as the struct pnfs_layout_range argument. Unfortunately, pnfs_mark_matching_lsegs_return() doesn't check if we have a value here before dereferencing it, causing an oops. I'm able to hit this crash consistently when running connectathon basic tests on NFS v4.1/v4.2 against Ontap.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 80e34f4957ec3010c85f9bb0b568a8d46acdf535 to < 4e1ba532dbc1a0e19fc2458d74ab8d98680c4e42affected
  • 7b7b9774643220e53eef58c15bb29bd4182fe053 to < 42637ca25c7d7b5a92804a679af5192e8c1a9f48affected
  • 9ffa7967f9379a0a1b924e9ffeda709d72237da7 to < 39785761feadf261bc5101372b0b0bbaf6a94494affected
  • 6be0e4b59314e4a836495f6ffdc5d2c5b079deeb to < aba3c7795f51717ae316f3566442dee7cc3eeccbaffected
  • 2fafe7d5047f98791afd9a1d90d2afb70debc590 to < f9890652185b72b8de9ebeb4406037640b6e1b53affected
  • 7e65ea887d0c0997f3053acd91a027af45e71c5b to < b090d110e66636bca473fd8b98d5c97b555a965aaffected
  • de144ff4234f935bd2150108019b5d87a90a8a96 to < a421d218603ffa822a0b8045055c03eae394a7ebaffected
  • 96260bde1ea8ae31a5402fe506abbb8951d5a42caffected
  • 5.11.20 to < 5.12affected

Linux Linux

Default version status: unaffected

  • 4.9.269 to < 4.9.271affected
  • 4.14.233 to < 4.14.235affected
  • 4.19.191 to < 4.19.193affected
  • 5.4.118 to < 5.4.124affected
  • 5.10.36 to < 5.10.42affected
  • 5.12.3 to < 5.12.9affected

References