cve-2024-50222
Vulnerability from cvelistv5
Published
2024-11-09 10:14
Modified
2025-05-04 09:49
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP generic/077 on x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y with highmem, on huge=always tmpfs, issues a warning and then hangs (interruptibly): WARNING: CPU: 5 PID: 3517 at mm/highmem.c:622 kunmap_local_indexed+0x62/0xc9 CPU: 5 UID: 0 PID: 3517 Comm: cp Not tainted 6.12.0-rc4 #2 ... copy_page_from_iter_atomic+0xa6/0x5ec generic_perform_write+0xf6/0x1b4 shmem_file_write_iter+0x54/0x67 Fix copy_page_from_iter_atomic() by limiting it in that case (include/linux/skbuff.h skb_frag_must_loop() does similar). But going forward, perhaps CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP is too surprising, has outlived its usefulness, and should just be removed?
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a303409f271dfe0987b8f79595138340497a32dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4f7ffa83fa79dd52efbaef366c850aaaae06a469Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ecPatch
Impacted products
Vendor Product Version
Linux Linux Version: 908a1ad89466c1febf20bfe0037b84fc66f8a3f8
Version: 908a1ad89466c1febf20bfe0037b84fc66f8a3f8
Version: 908a1ad89466c1febf20bfe0037b84fc66f8a3f8
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   Linux Linux Version: 6.6
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{
   containers: {
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "lib/iov_iter.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
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               vendor: "Linux",
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                  },
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                     status: "unaffected",
                     version: "6.12",
                     versionType: "original_commit_for_fix",
                  },
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         ],
         cpeApplicability: [
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         descriptions: [
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               value: "In the Linux kernel, the following vulnerability has been resolved:\n\niov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP\n\ngeneric/077 on x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y with highmem,\non huge=always tmpfs, issues a warning and then hangs (interruptibly):\n\nWARNING: CPU: 5 PID: 3517 at mm/highmem.c:622 kunmap_local_indexed+0x62/0xc9\nCPU: 5 UID: 0 PID: 3517 Comm: cp Not tainted 6.12.0-rc4 #2\n...\ncopy_page_from_iter_atomic+0xa6/0x5ec\ngeneric_perform_write+0xf6/0x1b4\nshmem_file_write_iter+0x54/0x67\n\nFix copy_page_from_iter_atomic() by limiting it in that case\n(include/linux/skbuff.h skb_frag_must_loop() does similar).\n\nBut going forward, perhaps CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP is too\nsurprising, has outlived its usefulness, and should just be removed?",
            },
         ],
         providerMetadata: {
            dateUpdated: "2025-05-04T09:49:07.181Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
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            },
            {
               url: "https://git.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ec",
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         title: "iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP",
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   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-50222",
      datePublished: "2024-11-09T10:14:33.266Z",
      dateReserved: "2024-10-21T19:36:19.973Z",
      dateUpdated: "2025-05-04T09:49:07.181Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
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   },
}


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