{"id":"CVE-2024-43835","summary":"virtio_net: Fix napi_skb_cache_put warning","details":"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's running in NAPI context\neven when it's 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.","modified":"2026-04-02T12:18:19.095280Z","published":"2024-08-17T09:21:52.425Z","related":["SUSE-SU-2024:3551-1","SUSE-SU-2024:3553-1","SUSE-SU-2024:3561-1","SUSE-SU-2024:3564-1","SUSE-SU-2024:3569-1","SUSE-SU-2024:3592-1","SUSE-SU-2025:20073-1","SUSE-SU-2025:20077-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43835.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620"},{"type":"WEB","url":"https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43835.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-43835"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"df133f3f96257ee29696c0ed8bd198ec801dc810"},{"fixed":"d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa"},{"fixed":"842a97b5e44f0c8a9fc356fe976e0e13ddcf7783"},{"fixed":"cc7340f18e45886121c131227985d64ef666012f"},{"fixed":"6b5325f2457521bbece29499970c0117a648c620"},{"fixed":"f5e9a22d19bb98a7e86034db85eb295e94187caa"},{"fixed":"468a729b78895893d0e580ceea49bed8ada2a2bd"},{"fixed":"f8321fa75102246d7415a6af441872f6637c93ab"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43835.json"}}],"schema_version":"1.7.5"}