cve-2024-35892
Vulnerability from cvelistv5
Published
2024-05-19 08:34
Modified
2024-08-02 03:21
Severity
Summary
net/sched: fix lockdep splat in qdisc_tree_reduce_backlog()
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/07696415526bee0607e495017369c7303a4792e1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7eb322360b0266481e560d1807ee79e0cef5742b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b7d1ce2cc7192e8a037faa3f5d3ba72c25976460
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c040b99461a5bfc14c2d0cbb1780fcc3a4706c7e
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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                "id": "CVE-2024-35892",
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-23T19:36:07.702598Z",
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          "dateUpdated": "2024-08-02T03:21:48.741Z",
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    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "custom"
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            {
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              "status": "unaffected",
              "version": "6.1.85",
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            {
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              "status": "unaffected",
              "version": "6.6.26",
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              "versionType": "custom"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix lockdep splat in qdisc_tree_reduce_backlog()\n\nqdisc_tree_reduce_backlog() is called with the qdisc lock held,\nnot RTNL.\n\nWe must use qdisc_lookup_rcu() instead of qdisc_lookup()\n\nsyzbot reported:\n\nWARNING: suspicious RCU usage\n6.1.74-syzkaller #0 Not tainted\n-----------------------------\nnet/sched/sch_api.c:305 suspicious rcu_dereference_protected() usage!\n\nother info that might help us debug this:\n\nrcu_scheduler_active = 2, debug_locks = 1\n3 locks held by udevd/1142:\n  #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]\n  #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]\n  #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: net_tx_action+0x64a/0x970 net/core/dev.c:5282\n  #1: ffff888171861108 (\u0026sch-\u003eq.lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline]\n  #1: ffff888171861108 (\u0026sch-\u003eq.lock){+.-.}-{2:2}, at: net_tx_action+0x754/0x970 net/core/dev.c:5297\n  #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]\n  #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]\n  #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: qdisc_tree_reduce_backlog+0x84/0x580 net/sched/sch_api.c:792\n\nstack backtrace:\nCPU: 1 PID: 1142 Comm: udevd Not tainted 6.1.74-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nCall Trace:\n \u003cTASK\u003e\n  [\u003cffffffff85b85f14\u003e] __dump_stack lib/dump_stack.c:88 [inline]\n  [\u003cffffffff85b85f14\u003e] dump_stack_lvl+0x1b1/0x28f lib/dump_stack.c:106\n  [\u003cffffffff85b86007\u003e] dump_stack+0x15/0x1e lib/dump_stack.c:113\n  [\u003cffffffff81802299\u003e] lockdep_rcu_suspicious+0x1b9/0x260 kernel/locking/lockdep.c:6592\n  [\u003cffffffff84f0054c\u003e] qdisc_lookup+0xac/0x6f0 net/sched/sch_api.c:305\n  [\u003cffffffff84f037c3\u003e] qdisc_tree_reduce_backlog+0x243/0x580 net/sched/sch_api.c:811\n  [\u003cffffffff84f5b78c\u003e] pfifo_tail_enqueue+0x32c/0x4b0 net/sched/sch_fifo.c:51\n  [\u003cffffffff84fbcf63\u003e] qdisc_enqueue include/net/sch_generic.h:833 [inline]\n  [\u003cffffffff84fbcf63\u003e] netem_dequeue+0xeb3/0x15d0 net/sched/sch_netem.c:723\n  [\u003cffffffff84eecab9\u003e] dequeue_skb net/sched/sch_generic.c:292 [inline]\n  [\u003cffffffff84eecab9\u003e] qdisc_restart net/sched/sch_generic.c:397 [inline]\n  [\u003cffffffff84eecab9\u003e] __qdisc_run+0x249/0x1e60 net/sched/sch_generic.c:415\n  [\u003cffffffff84d7aa96\u003e] qdisc_run+0xd6/0x260 include/net/pkt_sched.h:125\n  [\u003cffffffff84d85d29\u003e] net_tx_action+0x7c9/0x970 net/core/dev.c:5313\n  [\u003cffffffff85e002bd\u003e] __do_softirq+0x2bd/0x9bd kernel/softirq.c:616\n  [\u003cffffffff81568bca\u003e] invoke_softirq kernel/softirq.c:447 [inline]\n  [\u003cffffffff81568bca\u003e] __irq_exit_rcu+0xca/0x230 kernel/softirq.c:700\n  [\u003cffffffff81568ae9\u003e] irq_exit_rcu+0x9/0x20 kernel/softirq.c:712\n  [\u003cffffffff85b89f52\u003e] sysvec_apic_timer_interrupt+0x42/0x90 arch/x86/kernel/apic/apic.c:1107\n  [\u003cffffffff85c00ccb\u003e] asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:656"
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        "dateUpdated": "2024-05-29T05:30:48.746Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/c040b99461a5bfc14c2d0cbb1780fcc3a4706c7e"
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        {
          "url": "https://git.kernel.org/stable/c/7eb322360b0266481e560d1807ee79e0cef5742b"
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      "title": "net/sched: fix lockdep splat in qdisc_tree_reduce_backlog()",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35892",
    "datePublished": "2024-05-19T08:34:47.914Z",
    "dateReserved": "2024-05-17T13:50:33.113Z",
    "dateUpdated": "2024-08-02T03:21:48.741Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35892\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T09:15:10.230\",\"lastModified\":\"2024-05-20T13:00:04.957\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: fix lockdep splat in qdisc_tree_reduce_backlog()\\n\\nqdisc_tree_reduce_backlog() is called with the qdisc lock held,\\nnot RTNL.\\n\\nWe must use qdisc_lookup_rcu() instead of qdisc_lookup()\\n\\nsyzbot reported:\\n\\nWARNING: suspicious RCU usage\\n6.1.74-syzkaller #0 Not tainted\\n-----------------------------\\nnet/sched/sch_api.c:305 suspicious rcu_dereference_protected() usage!\\n\\nother info that might help us debug this:\\n\\nrcu_scheduler_active = 2, debug_locks = 1\\n3 locks held by udevd/1142:\\n  #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]\\n  #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]\\n  #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: net_tx_action+0x64a/0x970 net/core/dev.c:5282\\n  #1: ffff888171861108 (\u0026sch-\u003eq.lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline]\\n  #1: ffff888171861108 (\u0026sch-\u003eq.lock){+.-.}-{2:2}, at: net_tx_action+0x754/0x970 net/core/dev.c:5297\\n  #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]\\n  #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]\\n  #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, at: qdisc_tree_reduce_backlog+0x84/0x580 net/sched/sch_api.c:792\\n\\nstack backtrace:\\nCPU: 1 PID: 1142 Comm: udevd Not tainted 6.1.74-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\\nCall Trace:\\n \u003cTASK\u003e\\n  [\u003cffffffff85b85f14\u003e] __dump_stack lib/dump_stack.c:88 [inline]\\n  [\u003cffffffff85b85f14\u003e] dump_stack_lvl+0x1b1/0x28f lib/dump_stack.c:106\\n  [\u003cffffffff85b86007\u003e] dump_stack+0x15/0x1e lib/dump_stack.c:113\\n  [\u003cffffffff81802299\u003e] lockdep_rcu_suspicious+0x1b9/0x260 kernel/locking/lockdep.c:6592\\n  [\u003cffffffff84f0054c\u003e] qdisc_lookup+0xac/0x6f0 net/sched/sch_api.c:305\\n  [\u003cffffffff84f037c3\u003e] qdisc_tree_reduce_backlog+0x243/0x580 net/sched/sch_api.c:811\\n  [\u003cffffffff84f5b78c\u003e] pfifo_tail_enqueue+0x32c/0x4b0 net/sched/sch_fifo.c:51\\n  [\u003cffffffff84fbcf63\u003e] qdisc_enqueue include/net/sch_generic.h:833 [inline]\\n  [\u003cffffffff84fbcf63\u003e] netem_dequeue+0xeb3/0x15d0 net/sched/sch_netem.c:723\\n  [\u003cffffffff84eecab9\u003e] dequeue_skb net/sched/sch_generic.c:292 [inline]\\n  [\u003cffffffff84eecab9\u003e] qdisc_restart net/sched/sch_generic.c:397 [inline]\\n  [\u003cffffffff84eecab9\u003e] __qdisc_run+0x249/0x1e60 net/sched/sch_generic.c:415\\n  [\u003cffffffff84d7aa96\u003e] qdisc_run+0xd6/0x260 include/net/pkt_sched.h:125\\n  [\u003cffffffff84d85d29\u003e] net_tx_action+0x7c9/0x970 net/core/dev.c:5313\\n  [\u003cffffffff85e002bd\u003e] __do_softirq+0x2bd/0x9bd kernel/softirq.c:616\\n  [\u003cffffffff81568bca\u003e] invoke_softirq kernel/softirq.c:447 [inline]\\n  [\u003cffffffff81568bca\u003e] __irq_exit_rcu+0xca/0x230 kernel/softirq.c:700\\n  [\u003cffffffff81568ae9\u003e] irq_exit_rcu+0x9/0x20 kernel/softirq.c:712\\n  [\u003cffffffff85b89f52\u003e] sysvec_apic_timer_interrupt+0x42/0x90 arch/x86/kernel/apic/apic.c:1107\\n  [\u003cffffffff85c00ccb\u003e] asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:656\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/sched: corrige lockdep splat en qdisc_tree_reduce_backlog() qdisc_tree_reduce_backlog() se llama con el bloqueo de qdisc retenido, no con RTNL. Debemos usar qdisc_lookup_rcu() en lugar de qdisc_lookup() syzbot inform\u00f3: ADVERTENCIA: uso sospechoso de RCU 6.1.74-syzkaller #0 No contaminado ---------------------- ------- \u00a1net/sched/sch_api.c:305 uso sospechoso de rcu_dereference_protected()! otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto: rcu_scheduler_active = 2, debug_locks = 1 3 bloqueos mantenidos por udevd/1142: #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, en: rcu_lock_acquire include/linux /rcupdate.h:306 [en l\u00ednea] #0: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, en: rcu_read_lock include/linux/rcupdate.h:747 [en l\u00ednea] #0: ffffffff87c729a0 (rcu_read_lock ){....}-{1:2}, en: net_tx_action+0x64a/0x970 net/core/dev.c:5282 #1: ffff888171861108 (\u0026amp;sch-\u0026gt;q.lock){+.-.}-{ 2:2}, en: spin_lock include/linux/spinlock.h:350 [en l\u00ednea] #1: ffff888171861108 (\u0026amp;sch-\u0026gt;q.lock){+.-.}-{2:2}, en: net_tx_action+0x754 /0x970 net/core/dev.c:5297 #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, en: rcu_lock_acquire include/linux/rcupdate.h:306 [en l\u00ednea] #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2}, en: rcu_read_lock include/linux/rcupdate.h:747 [en l\u00ednea] #2: ffffffff87c729a0 (rcu_read_lock){....}-{1:2} , en: qdisc_tree_reduce_backlog+0x84/0x580 net/sched/sch_api.c:792 stack backtrace: CPU: 1 PID: 1142 Comm: udevd Not tainted 6.1.74-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 25/01/2024 Seguimiento de llamadas:  [] __dump_stack lib/dump_stack.c:88 [en l\u00ednea] [] dump_stack_lvl+0x1b1/0x28f lib/dump_stack.c:106 [ ] dump_stack+0x15/0x1e lib/dump_stack.c:113 [] lockdep_rcu_suspicious+0x1b9/0x260 kernel/locking/lockdep.c:6592 [] qdisc_lookup+0xac/0x6f0 net/sched/sch_a foto.c: 305 [] qdisc_tree_reduce_backlog+0x243/0x580 net/sched/sch_api.c:811 [] pfifo_tail_enqueue+0x32c/0x4b0 net/sched/sch_fifo.c:51 [ ] qdisc_enqueue incluye/net/sch_generic .h:833 [en l\u00ednea] [] netem_dequeue+0xeb3/0x15d0 net/sched/sch_netem.c:723 [] dequeue_skb net/sched/sch_generic.c:292 [en l\u00ednea] [] qdisc_restart net/sched/sch_generic.c:397 [en l\u00ednea] [] __qdisc_run+0x249/0x1e60 net/sched/sch_generic.c:415 [] qdisc_run+0xd6/0x260 include/net/pkt_sched.h:125 [] net_tx_action+0x7c9/0x970 net/core/dev.c:5313 [] __do_softirq+0x2bd/0x9bd kernel/softirq.c:616 [] invoke_softirq kernel/softirq.c: 447 [ en l\u00ednea] [] __irq_exit_rcu+0xca/0x230 kernel/softirq.c:700 [] irq_exit_rcu+0x9/0x20 kernel/softirq.c:712 [] sysvec_apic_timer_interrupt+0 x42/0x90 arco/x86/ kernel/apic/apic.c:1107 [] asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:656\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/07696415526bee0607e495017369c7303a4792e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7eb322360b0266481e560d1807ee79e0cef5742b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7d1ce2cc7192e8a037faa3f5d3ba72c25976460\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c040b99461a5bfc14c2d0cbb1780fcc3a4706c7e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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