CVE-2024-40914 (GCVE-0-2024-40914)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:24 – Updated: 2025-11-03 21:57
VLAI?
Title
mm/huge_memory: don't unpoison huge_zero_folio
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: don't unpoison huge_zero_folio When I did memory failure tests recently, below panic occurs: kernel BUG at include/linux/mm.h:1135! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 9 PID: 137 Comm: kswapd1 Not tainted 6.9.0-rc4-00491-gd5ce28f156fe-dirty #14 RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 Call Trace: <TASK> do_shrink_slab+0x14f/0x6a0 shrink_slab+0xca/0x8c0 shrink_node+0x2d0/0x7d0 balance_pgdat+0x33a/0x720 kswapd+0x1f3/0x410 kthread+0xd5/0x100 ret_from_fork+0x2f/0x50 ret_from_fork_asm+0x1a/0x30 </TASK> Modules linked in: mce_inject hwpoison_inject ---[ end trace 0000000000000000 ]--- RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 The root cause is that HWPoison flag will be set for huge_zero_folio without increasing the folio refcnt. But then unpoison_memory() will decrease the folio refcnt unexpectedly as it appears like a successfully hwpoisoned folio leading to VM_BUG_ON_PAGE(page_ref_count(page) == 0) when releasing huge_zero_folio. Skip unpoisoning huge_zero_folio in unpoison_memory() to fix this issue. We're not prepared to unpoison huge_zero_folio yet.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f8f836100fff594cea8a0a027affb9d5520f09a7 , < 688bb46ad339497b5b7f527b6636d2afe04b46af (git)
Affected: 478d134e9506c7e9bfe2830ed03dd85e97966313 , < b2494506f30675245a3e6787281f79601af087bf (git)
Affected: 478d134e9506c7e9bfe2830ed03dd85e97966313 , < 0d73477af964dbd7396163a13817baf13940bca9 (git)
Affected: 478d134e9506c7e9bfe2830ed03dd85e97966313 , < d72b7711919de49d92a67dfc844a6cf4c23dd794 (git)
Affected: 478d134e9506c7e9bfe2830ed03dd85e97966313 , < fe6f86f4b40855a130a19aa589f9ba7f650423f4 (git)
Affected: 13d9b8cd12f37d133b07ea5b323583e8a0c6b738 (git)
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    Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.95 , ≤ 6.1.* (semver)
Unaffected: 6.6.35 , ≤ 6.6.* (semver)
Unaffected: 6.9.6 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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0000000000000000\\n R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00\\n FS:  0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0\\n Call Trace:\\n  \u003cTASK\u003e\\n  do_shrink_slab+0x14f/0x6a0\\n  shrink_slab+0xca/0x8c0\\n  shrink_node+0x2d0/0x7d0\\n  balance_pgdat+0x33a/0x720\\n  kswapd+0x1f3/0x410\\n  kthread+0xd5/0x100\\n  ret_from_fork+0x2f/0x50\\n  ret_from_fork_asm+0x1a/0x30\\n  \u003c/TASK\u003e\\n Modules linked in: mce_inject hwpoison_inject\\n ---[ end trace 0000000000000000 ]---\\n RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0\\n RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246\\n RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8\\n RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0\\n RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492\\n R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000\\n R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00\\n FS:  0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0\\n\\nThe root cause is that HWPoison flag will be set for huge_zero_folio\\nwithout increasing the folio refcnt.  But then unpoison_memory() will\\ndecrease the folio refcnt unexpectedly as it appears like a successfully\\nhwpoisoned folio leading to VM_BUG_ON_PAGE(page_ref_count(page) == 0) when\\nreleasing huge_zero_folio.\\n\\nSkip unpoisoning huge_zero_folio in unpoison_memory() to fix this issue. \\nWe\u0027re not prepared to unpoison huge_zero_folio yet.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.162\", \"versionStartIncluding\": \"5.15.41\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.95\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.35\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.6\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.17.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T12:57:12.189Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40914\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:57:44.975Z\", \"dateReserved\": \"2024-07-12T12:17:45.581Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:24:58.055Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.