cve-2024-35929
Vulnerability from cvelistv5
Published
2024-05-19 10:10
Modified
2024-08-02 03:21
Severity
Summary
rcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d58c9fb45c70e62c19e8be3f3605889c47601bc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/927d1f4f77e4784ab3944a9df86ab14d1cd3185a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dda98810b552fc6bf650f4270edeebdc2f28bd3f
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
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                "timestamp": "2024-05-23T19:21:22.724357Z",
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    "cna": {
      "affected": [
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          "product": "Linux",
          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()\n\nFor the kernels built with CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y and\nCONFIG_RCU_LAZY=y, the following scenarios will trigger WARN_ON_ONCE()\nin the rcu_nocb_bypass_lock() and rcu_nocb_wait_contended() functions:\n\n        CPU2                                               CPU11\nkthread\nrcu_nocb_cb_kthread                                       ksys_write\nrcu_do_batch                                              vfs_write\nrcu_torture_timer_cb                                      proc_sys_write\n__kmem_cache_free                                         proc_sys_call_handler\nkmemleak_free                                             drop_caches_sysctl_handler\ndelete_object_full                                        drop_slab\n__delete_object                                           shrink_slab\nput_object                                                lazy_rcu_shrink_scan\ncall_rcu                                                  rcu_nocb_flush_bypass\n__call_rcu_commn                                            rcu_nocb_bypass_lock\n                                                            raw_spin_trylock(\u0026rdp-\u003enocb_bypass_lock) fail\n                                                            atomic_inc(\u0026rdp-\u003enocb_lock_contended);\nrcu_nocb_wait_contended                                     WARN_ON_ONCE(smp_processor_id() != rdp-\u003ecpu);\n WARN_ON_ONCE(atomic_read(\u0026rdp-\u003enocb_lock_contended))                                          |\n                            |_ _ _ _ _ _ _ _ _ _same rdp and rdp-\u003ecpu != 11_ _ _ _ _ _ _ _ _ __|\n\nReproduce this bug with \"echo 3 \u003e /proc/sys/vm/drop_caches\".\n\nThis commit therefore uses rcu_nocb_try_flush_bypass() instead of\nrcu_nocb_flush_bypass() in lazy_rcu_shrink_scan().  If the nocb_bypass\nqueue is being flushed, then rcu_nocb_try_flush_bypass will return\ndirectly."
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      "title": "rcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35929",
    "datePublished": "2024-05-19T10:10:38.388Z",
    "dateReserved": "2024-05-17T13:50:33.129Z",
    "dateUpdated": "2024-08-02T03:21:49.023Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35929\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-19T11:15:48.993\",\"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\\nrcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()\\n\\nFor the kernels built with CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y and\\nCONFIG_RCU_LAZY=y, the following scenarios will trigger WARN_ON_ONCE()\\nin the rcu_nocb_bypass_lock() and rcu_nocb_wait_contended() functions:\\n\\n        CPU2                                               CPU11\\nkthread\\nrcu_nocb_cb_kthread                                       ksys_write\\nrcu_do_batch                                              vfs_write\\nrcu_torture_timer_cb                                      proc_sys_write\\n__kmem_cache_free                                         proc_sys_call_handler\\nkmemleak_free                                             drop_caches_sysctl_handler\\ndelete_object_full                                        drop_slab\\n__delete_object                                           shrink_slab\\nput_object                                                lazy_rcu_shrink_scan\\ncall_rcu                                                  rcu_nocb_flush_bypass\\n__call_rcu_commn                                            rcu_nocb_bypass_lock\\n                                                            raw_spin_trylock(\u0026rdp-\u003enocb_bypass_lock) fail\\n                                                            atomic_inc(\u0026rdp-\u003enocb_lock_contended);\\nrcu_nocb_wait_contended                                     WARN_ON_ONCE(smp_processor_id() != rdp-\u003ecpu);\\n WARN_ON_ONCE(atomic_read(\u0026rdp-\u003enocb_lock_contended))                                          |\\n                            |_ _ _ _ _ _ _ _ _ _same rdp and rdp-\u003ecpu != 11_ _ _ _ _ _ _ _ _ __|\\n\\nReproduce this bug with \\\"echo 3 \u003e /proc/sys/vm/drop_caches\\\".\\n\\nThis commit therefore uses rcu_nocb_try_flush_bypass() instead of\\nrcu_nocb_flush_bypass() in lazy_rcu_shrink_scan().  If the nocb_bypass\\nqueue is being flushed, then rcu_nocb_try_flush_bypass will return\\ndirectly.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: rcu/nocb: corrija WARN_ON_ONCE() en rcu_nocb_bypass_lock() Para los kernels creados con CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y y CONFIG_RCU_LAZY=y, los siguientes escenarios activar\u00e1n WARN_ON_ONCE() en rcu_nocb_bypass_lock( ) y funciones rcu_nocb_wait_contended(): CPU2 CPU11 kthread rcu_nocb_cb_kthread ksys_write rcu_do_batch vfs_write rcu_torture_timer_cb proc_sys_write __kmem_cache_free proc_sys_call_handler kmemleak_free drop_caches_sysctl_handler delete_object_full losa __delete_object encogimiento_slab put_object lazy_rcu_shrink_scan call_rcu rcu_nocb_flush_bypass __call_rcu_commn rcu_nocb_bypass_lock raw_spin_trylock(\u0026amp;rdp-\u0026gt;nocb_bypass_lock) fail atomic_inc(\u0026amp;rdp-\u0026gt;nocb_lock_contended); rcu_nocb_wait_contended WARN_ON_ONCE(smp_processor_id()!= rdp-\u0026gt;cpu); WARN_ON_ONCE(atomic_read(\u0026amp;rdp-\u0026gt;nocb_lock_contended)) | |_ _ _ _ _ _ _ _ _ _mismo rdp y rdp-\u0026gt;cpu != 11_ _ _ _ _ _ _ _ _ __| Reproduzca este error con \\\"echo 3 \u0026gt; /proc/sys/vm/drop_caches\\\". Por lo tanto, esta confirmaci\u00f3n utiliza rcu_nocb_try_flush_bypass() en lugar de rcu_nocb_flush_bypass() en lazy_rcu_shrink_scan(). Si se est\u00e1 vaciando la cola nocb_bypass, entonces rcu_nocb_try_flush_bypass regresar\u00e1 directamente.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4d58c9fb45c70e62c19e8be3f3605889c47601bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/927d1f4f77e4784ab3944a9df86ab14d1cd3185a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dda98810b552fc6bf650f4270edeebdc2f28bd3f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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