cve-2024-43835
Vulnerability from cvelistv5
Published
2024-08-17 09:21
Modified
2024-12-19 09:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix napi_skb_cache_put warning After the commit bdacf3e34945 ("net: Use nested-BH locking for napi_alloc_cache.") was merged, the following warning began to appear: WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0 __warn+0x12f/0x340 napi_skb_cache_put+0x82/0x4b0 napi_skb_cache_put+0x82/0x4b0 report_bug+0x165/0x370 handle_bug+0x3d/0x80 exc_invalid_op+0x1a/0x50 asm_exc_invalid_op+0x1a/0x20 __free_old_xmit+0x1c8/0x510 napi_skb_cache_put+0x82/0x4b0 __free_old_xmit+0x1c8/0x510 __free_old_xmit+0x1c8/0x510 __pfx___free_old_xmit+0x10/0x10 The issue arises because virtio is assuming it's running in NAPI context even when it's not, such as in the netpoll case. To resolve this, modify virtnet_poll_tx() to only set NAPI when budget is available. Same for virtnet_poll_cleantx(), which always assumed that it was in a NAPI context.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bdPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93abPatch
Impacted products
Vendor Product Version
Linux Linux Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
Version: df133f3f96257ee29696c0ed8bd198ec801dc810
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   Linux Linux Version: 5.0
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix napi_skb_cache_put warning\n\nAfter the commit bdacf3e34945 (\"net: Use nested-BH locking for\nnapi_alloc_cache.\") was merged, the following warning began to appear:\n\n\t WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0\n\n\t  __warn+0x12f/0x340\n\t  napi_skb_cache_put+0x82/0x4b0\n\t  napi_skb_cache_put+0x82/0x4b0\n\t  report_bug+0x165/0x370\n\t  handle_bug+0x3d/0x80\n\t  exc_invalid_op+0x1a/0x50\n\t  asm_exc_invalid_op+0x1a/0x20\n\t  __free_old_xmit+0x1c8/0x510\n\t  napi_skb_cache_put+0x82/0x4b0\n\t  __free_old_xmit+0x1c8/0x510\n\t  __free_old_xmit+0x1c8/0x510\n\t  __pfx___free_old_xmit+0x10/0x10\n\nThe issue arises because virtio is assuming it\u0027s running in NAPI context\neven when it\u0027s not, such as in the netpoll case.\n\nTo resolve this, modify virtnet_poll_tx() to only set NAPI when budget\nis available. Same for virtnet_poll_cleantx(), which always assumed that\nit was in a NAPI context."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-43835",
    "datePublished": "2024-08-17T09:21:52.425Z",
    "dateReserved": "2024-08-17T09:11:59.274Z",
    "dateUpdated": "2024-12-19T09:16:48.894Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-43835\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-17T10:15:09.183\",\"lastModified\":\"2024-10-30T21:45:17.447\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvirtio_net: Fix napi_skb_cache_put warning\\n\\nAfter the commit bdacf3e34945 (\\\"net: Use nested-BH locking for\\nnapi_alloc_cache.\\\") was merged, the following warning began to appear:\\n\\n\\t WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0\\n\\n\\t  __warn+0x12f/0x340\\n\\t  napi_skb_cache_put+0x82/0x4b0\\n\\t  napi_skb_cache_put+0x82/0x4b0\\n\\t  report_bug+0x165/0x370\\n\\t  handle_bug+0x3d/0x80\\n\\t  exc_invalid_op+0x1a/0x50\\n\\t  asm_exc_invalid_op+0x1a/0x20\\n\\t  __free_old_xmit+0x1c8/0x510\\n\\t  napi_skb_cache_put+0x82/0x4b0\\n\\t  __free_old_xmit+0x1c8/0x510\\n\\t  __free_old_xmit+0x1c8/0x510\\n\\t  __pfx___free_old_xmit+0x10/0x10\\n\\nThe issue arises because virtio is assuming it\u0027s running in NAPI context\\neven when it\u0027s not, such as in the netpoll case.\\n\\nTo resolve this, modify virtnet_poll_tx() to only set NAPI when budget\\nis available. Same for virtnet_poll_cleantx(), which always assumed that\\nit was in a NAPI context.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: virtio_net: corrige la advertencia de napi_skb_cache_put Despu\u00e9s de que se fusion\u00f3 el commit bdacf3e34945 (\\\"net: Use bloqueo de BH anidado para napi_alloc_cache.\\\"), comenz\u00f3 a aparecer la siguiente advertencia: ADVERTENCIA: CPU: 5 PID: 1 en net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0 __warn+0x12f/0x340 napi_skb_cache_put+0x82/0x4b0 napi_skb_cache_put+0x82/0x4b0 report_bug+0x165/0x370 x80 exc_invalid_op+0x1a/0x50 asm_exc_invalid_op+ 0x1a/0x20 __free_old_xmit+0x1c8/0x510 napi_skb_cache_put+0x82/0x4b0 __free_old_xmit+0x1c8/0x510 __free_old_xmit+0x1c8/0x510 __pfx___free_old_xmit+0x10/0x10 El problema surge porque virtio asumiendo que se est\u00e1 ejecutando en el contexto NAPI incluso cuando no lo es, como en netpoll caso. Para resolver esto, modifique virtnet_poll_tx() para configurar NAPI solo cuando haya presupuesto disponible. Lo mismo ocurre con virtnet_poll_cleantx(), que siempre asumi\u00f3 que estaba en un contexto NAPI.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.0\",\"versionEndExcluding\":\"6.10.3\",\"matchCriteriaId\":\"24574782-30C5-4044-BD18-A21100B2C80D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
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{\"status\": \"affected\", \"version\": \"df133f3f96257ee29696c0ed8bd198ec801dc810\", \"lessThan\": \"f8321fa75102246d7415a6af441872f6637c93ab\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/virtio_net.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.322\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.284\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.226\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.167\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.109\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.50\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/virtio_net.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/19ac6f29bf64304ef04630c8ab56ecd2059d7aa1\"}, {\"url\": \"https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa\"}, {\"url\": \"https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783\"}, {\"url\": \"https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f\"}, {\"url\": \"https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620\"}, {\"url\": \"https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa\"}, {\"url\": \"https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd\"}, {\"url\": \"https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvirtio_net: Fix napi_skb_cache_put warning\\n\\nAfter the commit bdacf3e34945 (\\\"net: Use nested-BH locking for\\nnapi_alloc_cache.\\\") was merged, the following warning began to appear:\\n\\n\\t WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0\\n\\n\\t  __warn+0x12f/0x340\\n\\t  napi_skb_cache_put+0x82/0x4b0\\n\\t  napi_skb_cache_put+0x82/0x4b0\\n\\t  report_bug+0x165/0x370\\n\\t  handle_bug+0x3d/0x80\\n\\t  exc_invalid_op+0x1a/0x50\\n\\t  asm_exc_invalid_op+0x1a/0x20\\n\\t  __free_old_xmit+0x1c8/0x510\\n\\t  napi_skb_cache_put+0x82/0x4b0\\n\\t  __free_old_xmit+0x1c8/0x510\\n\\t  __free_old_xmit+0x1c8/0x510\\n\\t  __pfx___free_old_xmit+0x10/0x10\\n\\nThe issue arises because virtio is assuming it\u0027s running in NAPI context\\neven when it\u0027s not, such as in the netpoll case.\\n\\nTo resolve this, modify virtnet_poll_tx() to only set NAPI when budget\\nis available. Same for virtnet_poll_cleantx(), which always assumed that\\nit was in a NAPI context.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:16:48.894Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-43835\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:16:48.894Z\", \"dateReserved\": \"2024-08-17T09:11:59.274Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-17T09:21:52.425Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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