cve-2024-50212
Vulnerability from cvelistv5
Published
2024-11-09 10:14
Modified
2024-12-19 09:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: lib: alloc_tag_module_unload must wait for pending kfree_rcu calls Ben Greear reports following splat: ------------[ cut here ]------------ net/netfilter/nf_nat_core.c:1114 module nf_nat func:nf_nat_register_fn has 256 allocated at module unload WARNING: CPU: 1 PID: 10421 at lib/alloc_tag.c:168 alloc_tag_module_unload+0x22b/0x3f0 Modules linked in: nf_nat(-) btrfs ufs qnx4 hfsplus hfs minix vfat msdos fat ... Hardware name: Default string Default string/SKYBAY, BIOS 5.12 08/04/2020 RIP: 0010:alloc_tag_module_unload+0x22b/0x3f0 codetag_unload_module+0x19b/0x2a0 ? codetag_load_module+0x80/0x80 nf_nat module exit calls kfree_rcu on those addresses, but the free operation is likely still pending by the time alloc_tag checks for leaks. Wait for outstanding kfree_rcu operations to complete before checking resolves this warning. Reproducer: unshare -n iptables-nft -t nat -A PREROUTING -p tcp grep nf_nat /proc/allocinfo # will list 4 allocations rmmod nft_chain_nat rmmod nf_nat # will WARN. [akpm@linux-foundation.org: add comment]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24211fb49c9ac1b576470b7e393a5a0b50af2707
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc783ba4b9df3fb3e76e968b2cbeb9960069263c
Impacted products
Vendor Product Version
Linux Linux Version: a473573964e51dcb6efc182f773cd3924be4a184
Version: a473573964e51dcb6efc182f773cd3924be4a184
 Create a notification for this product.
   Linux Linux Version: 6.10
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "lib/codetag.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "24211fb49c9ac1b576470b7e393a5a0b50af2707",
                     status: "affected",
                     version: "a473573964e51dcb6efc182f773cd3924be4a184",
                     versionType: "git",
                  },
                  {
                     lessThan: "dc783ba4b9df3fb3e76e968b2cbeb9960069263c",
                     status: "affected",
                     version: "a473573964e51dcb6efc182f773cd3924be4a184",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "lib/codetag.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "6.10",
                  },
                  {
                     lessThan: "6.10",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.11.*",
                     status: "unaffected",
                     version: "6.11.7",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.12",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\nlib: alloc_tag_module_unload must wait for pending kfree_rcu calls\n\nBen Greear reports following splat:\n ------------[ cut here ]------------\n net/netfilter/nf_nat_core.c:1114 module nf_nat func:nf_nat_register_fn has 256 allocated at module unload\n WARNING: CPU: 1 PID: 10421 at lib/alloc_tag.c:168 alloc_tag_module_unload+0x22b/0x3f0\n Modules linked in: nf_nat(-) btrfs ufs qnx4 hfsplus hfs minix vfat msdos fat\n...\n Hardware name: Default string Default string/SKYBAY, BIOS 5.12 08/04/2020\n RIP: 0010:alloc_tag_module_unload+0x22b/0x3f0\n  codetag_unload_module+0x19b/0x2a0\n  ? codetag_load_module+0x80/0x80\n\nnf_nat module exit calls kfree_rcu on those addresses, but the free\noperation is likely still pending by the time alloc_tag checks for leaks.\n\nWait for outstanding kfree_rcu operations to complete before checking\nresolves this warning.\n\nReproducer:\nunshare -n iptables-nft -t nat -A PREROUTING -p tcp\ngrep nf_nat /proc/allocinfo # will list 4 allocations\nrmmod nft_chain_nat\nrmmod nf_nat                # will WARN.\n\n[akpm@linux-foundation.org: add comment]",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T09:35:32.997Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/24211fb49c9ac1b576470b7e393a5a0b50af2707",
            },
            {
               url: "https://git.kernel.org/stable/c/dc783ba4b9df3fb3e76e968b2cbeb9960069263c",
            },
         ],
         title: "lib: alloc_tag_module_unload must wait for pending kfree_rcu calls",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-50212",
      datePublished: "2024-11-09T10:14:24.249Z",
      dateReserved: "2024-10-21T19:36:19.971Z",
      dateUpdated: "2024-12-19T09:35:32.997Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2024-50212\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-11-09T11:15:04.940\",\"lastModified\":\"2024-11-12T13:56:24.513\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nlib: alloc_tag_module_unload must wait for pending kfree_rcu calls\\n\\nBen Greear reports following splat:\\n ------------[ cut here ]------------\\n net/netfilter/nf_nat_core.c:1114 module nf_nat func:nf_nat_register_fn has 256 allocated at module unload\\n WARNING: CPU: 1 PID: 10421 at lib/alloc_tag.c:168 alloc_tag_module_unload+0x22b/0x3f0\\n Modules linked in: nf_nat(-) btrfs ufs qnx4 hfsplus hfs minix vfat msdos fat\\n...\\n Hardware name: Default string Default string/SKYBAY, BIOS 5.12 08/04/2020\\n RIP: 0010:alloc_tag_module_unload+0x22b/0x3f0\\n  codetag_unload_module+0x19b/0x2a0\\n  ? codetag_load_module+0x80/0x80\\n\\nnf_nat module exit calls kfree_rcu on those addresses, but the free\\noperation is likely still pending by the time alloc_tag checks for leaks.\\n\\nWait for outstanding kfree_rcu operations to complete before checking\\nresolves this warning.\\n\\nReproducer:\\nunshare -n iptables-nft -t nat -A PREROUTING -p tcp\\ngrep nf_nat /proc/allocinfo # will list 4 allocations\\nrmmod nft_chain_nat\\nrmmod nf_nat                # will WARN.\\n\\n[akpm@linux-foundation.org: add comment]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: lib: alloc_tag_module_unload debe esperar llamadas kfree_rcu pendientes Ben Greear informa del siguiente splat: ------------[ cortar aquí ]------------ net/netfilter/nf_nat_core.c:1114 módulo nf_nat func:nf_nat_register_fn tiene 256 asignados en la descarga del módulo ADVERTENCIA: CPU: 1 PID: 10421 en lib/alloc_tag.c:168 alloc_tag_module_unload+0x22b/0x3f0 Módulos vinculados en: nf_nat(-) btrfs ufs qnx4 hfsplus hfs minix vfat msdos fat ... Nombre del hardware: Cadena predeterminada Cadena predeterminada/SKYBAY, BIOS 5.12 08/04/2020 RIP: 0010:alloc_tag_module_unload+0x22b/0x3f0 codetag_unload_module+0x19b/0x2a0 ? codetag_load_module+0x80/0x80 La salida del módulo nf_nat llama a kfree_rcu en esas direcciones, pero es probable que la operación de liberación aún esté pendiente en el momento en que alloc_tag verifique si hay fugas. Espere a que se completen las operaciones kfree_rcu pendientes antes de que la verificación resuelva esta advertencia. Reproductor: unshare -n iptables-nft -t nat -A PREROUTING -p tcp grep nf_nat /proc/allocinfo # enumerará 4 asignaciones rmmod nft_chain_nat rmmod nf_nat # emitirá una ADVERTENCIA. [akpm@linux-foundation.org: agregar comentario]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/24211fb49c9ac1b576470b7e393a5a0b50af2707\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dc783ba4b9df3fb3e76e968b2cbeb9960069263c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.