{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()\n\nsyzbot found hanging tasks waiting on rtnl_lock [1]\n\nA reproducer is available in the syzbot bug.\n\nWhen a request to add multiple actions with the same index is sent, the\nsecond request will block forever on the first request. This holds\nrtnl_lock, and causes tasks to hang.\n\nReturn -EAGAIN to prevent infinite looping, while keeping documented\nbehavior.\n\n[1]\n\nINFO: task kworker/1:0:5088 blocked for more than 143 seconds.\nNot tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0\n\"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000\nWorkqueue: events_power_efficient reg_check_chans_work\nCall Trace:\n<TASK>\ncontext_switch kernel/sched/core.c:5409 [inline]\n__schedule+0xf15/0x5d00 kernel/sched/core.c:6746\n__schedule_loop kernel/sched/core.c:6823 [inline]\nschedule+0xe7/0x350 kernel/sched/core.c:6838\nschedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895\n__mutex_lock_common kernel/locking/mutex.c:684 [inline]\n__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752\nwiphy_lock include/net/cfg80211.h:5953 [inline]\nreg_leave_invalid_chans net/wireless/reg.c:2466 [inline]\nreg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481"
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/sched/act_api.c"
               ],
               "versions": [
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "0d8a2d287c8a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "c6a7da65a296",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "25987a97eec4",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "6fc78d67f51a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "5f926aa96b08",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "7a0e497b597d",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "0190c1d452a9",
                     "lessThan": "d864319871b0",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "net/sched/act_api.c"
               ],
               "versions": [
                  {
                     "version": "4.19",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "4.19",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.4.279",
                     "lessThanOrEqual": "5.4.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.10.221",
                     "lessThanOrEqual": "5.10.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "5.15.162",
                     "lessThanOrEqual": "5.15.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.1.96",
                     "lessThanOrEqual": "6.1.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.36",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.9.7",
                     "lessThanOrEqual": "6.9.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.10",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74"
            },
            {
               "url": "https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90"
            },
            {
               "url": "https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da"
            },
            {
               "url": "https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4"
            },
            {
               "url": "https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2"
            },
            {
               "url": "https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335"
            },
            {
               "url": "https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6"
            }
         ],
         "title": "net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-40995",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}