{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-27010",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-27010"
  ],
  "published": "2024-05-01T05:31:05Z",
  "summary": "net/sched: Fix mirred deadlock on device recursion",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: Fix mirred deadlock on device recursion\n\nWhen the mirred action is used on a classful egress qdisc and a packet is\nmirrored or redirected to self we hit a qdisc lock deadlock.\nSee trace below.\n\n[..... other info removed for brevity....]\n[   82.890906]\n[   82.890906] ============================================\n[   82.890906] WARNING: possible recursive locking detected\n[   82.890906] 6.8.0-05205-g77fadd89fe2d-dirty #213 Tainted: G        W\n[   82.890906] --------------------------------------------\n[   82.890906] ping/418 is trying to acquire lock:\n[   82.890906] ffff888006994110 (&sch->q.lock){+.-.}-{3:3}, at:\n__dev_queue_xmit+0x1778/0x3550\n[   82.890906]\n[   82.890906] but task is already holding lock:\n[   82.890906] ffff888006994110 (&sch->q.lock){+.-.}-{3:3}, at:\n__dev_queue_xmit+0x1778/0x3550\n[   82.890906]\n[   82.890906] other info that might help us debug this:\n[   82.890906]  Possible unsafe locking scenario:\n[   82.890906]\n[   82.890906]        CPU0\n[   82.890906]        ----\n[   82.890906]   lock(&sch->q.lock);\n[   82.890906]   lock(&sch->q.lock);\n[   82.890906]\n[   82.890906]  *** DEADLOCK ***\n[   82.890906]\n[..... other info removed for brevity....]\n\nExample setup (eth0->eth0) to recreate\ntc qdisc add dev eth0 root handle 1: htb default 30\ntc filter add dev eth0 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth0\n\nAnother example(eth0->eth1->eth0) to recreate\ntc qdisc add dev eth0 root handle 1: htb default 30\ntc filter add dev eth0 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth1\n\ntc qdisc add dev eth1 root handle 1: htb default 30\ntc filter add dev eth1 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth0\n\nWe fix this by adding an owner field (CPU id) to struct Qdisc set after\nroot qdisc is entered. When the softirq enters it a second time, if the\nqdisc owner is the same CPU, the packet is dropped to break the loop.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-27010"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/524323f52cbfbac4fe3f8a33a8cc405fafba0d33"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e6b90468da4dae2281a6e381107f411efb48b0ef"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0f022d32c3eca477fbf79a205243a6123ed0fe11"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-02T13:01:47Z"
  }
}