{"id":"CVE-2024-50304","summary":"ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()\n\nThe per-netns IP tunnel hash table is protected by the RTNL mutex and\nip_tunnel_find() is only called from the control path where the mutex is\ntaken.\n\nAdd a lockdep expression to hlist_for_each_entry_rcu() in\nip_tunnel_find() in order to validate that the mutex is held and to\nsilence the suspicious RCU usage warning [1].\n\n[1]\nWARNING: suspicious RCU usage\n6.12.0-rc3-custom-gd95d9a31aceb #139 Not tainted\n-----------------------------\nnet/ipv4/ip_tunnel.c:221 RCU-list traversed in non-reader section!!\n\nother info that might help us debug this:\n\nrcu_scheduler_active = 2, debug_locks = 1\n1 lock held by ip/362:\n #0: ffffffff86fc7cb0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x377/0xf60\n\nstack backtrace:\nCPU: 12 UID: 0 PID: 362 Comm: ip Not tainted 6.12.0-rc3-custom-gd95d9a31aceb #139\nHardware name: Bochs Bochs, BIOS Bochs 01/01/2011\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0xba/0x110\n lockdep_rcu_suspicious.cold+0x4f/0xd6\n ip_tunnel_find+0x435/0x4d0\n ip_tunnel_newlink+0x517/0x7a0\n ipgre_newlink+0x14c/0x170\n __rtnl_newlink+0x1173/0x19c0\n rtnl_newlink+0x6c/0xa0\n rtnetlink_rcv_msg+0x3cc/0xf60\n netlink_rcv_skb+0x171/0x450\n netlink_unicast+0x539/0x7f0\n netlink_sendmsg+0x8c1/0xd80\n ____sys_sendmsg+0x8f9/0xc20\n ___sys_sendmsg+0x197/0x1e0\n __sys_sendmsg+0x122/0x1f0\n do_syscall_64+0xbb/0x1d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f","modified":"2026-04-02T12:21:23.360293Z","published":"2024-11-19T17:19:30.242Z","related":["SUSE-SU-2025:0428-1","SUSE-SU-2025:0499-1","SUSE-SU-2025:0557-1","SUSE-SU-2025:0564-1","SUSE-SU-2025:0834-1","SUSE-SU-2025:20190-1","SUSE-SU-2025:20192-1","SUSE-SU-2025:20260-1","SUSE-SU-2025:20270-1","USN-7276-1","USN-7277-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50304.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/31bd7378c6fe100a8af0e996ea0b5dafd3579df6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ac5dfa575136da8dd8a9e7c1437c41f3a593993"},{"type":"WEB","url":"https://git.kernel.org/stable/c/90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ce11424026cbf87d5861b09e5e33565ff7f2ec8d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e0500e4373cd3d5eace1f1712444ab830b82c114"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50304.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50304"},{"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":"c54419321455631079c7d6e60bc732dd0c5914c5"},{"fixed":"31bd7378c6fe100a8af0e996ea0b5dafd3579df6"},{"fixed":"6ac5dfa575136da8dd8a9e7c1437c41f3a593993"},{"fixed":"ce11424026cbf87d5861b09e5e33565ff7f2ec8d"},{"fixed":"e0500e4373cd3d5eace1f1712444ab830b82c114"},{"fixed":"f20fe2cfe06ca1b008b09da4f2b4e0c5547ccef6"},{"fixed":"90e0569dd3d32f4f4d2ca691d3fa5a8a14a13c12"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-50304.json"}}],"schema_version":"1.7.5"}