{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: perf: Do not broadcast to other cpus when starting a counter\n\nThis command:\n\n$ perf record -e cycles:k -e instructions:k -c 10000 -m 64M dd if=/dev/zero of=/dev/null count=1000\n\ngives rise to this kernel warning:\n\n[  444.364395] WARNING: CPU: 0 PID: 104 at kernel/smp.c:775 smp_call_function_many_cond+0x42c/0x436\n[  444.364515] Modules linked in:\n[  444.364657] CPU: 0 PID: 104 Comm: perf-exec Not tainted 6.6.0-rc6-00051-g391df82e8ec3-dirty #73\n[  444.364771] Hardware name: riscv-virtio,qemu (DT)\n[  444.364868] epc : smp_call_function_many_cond+0x42c/0x436\n[  444.364917]  ra : on_each_cpu_cond_mask+0x20/0x32\n[  444.364948] epc : ffffffff8009f9e0 ra : ffffffff8009fa5a sp : ff20000000003800\n[  444.364966]  gp : ffffffff81500aa0 tp : ff60000002b83000 t0 : ff200000000038c0\n[  444.364982]  t1 : ffffffff815021f0 t2 : 000000000000001f s0 : ff200000000038b0\n[  444.364998]  s1 : ff60000002c54d98 a0 : ff60000002a73940 a1 : 0000000000000000\n[  444.365013]  a2 : 0000000000000000 a3 : 0000000000000003 a4 : 0000000000000100\n[  444.365029]  a5 : 0000000000010100 a6 : 0000000000f00000 a7 : 0000000000000000\n[  444.365044]  s2 : 0000000000000000 s3 : ffffffffffffffff s4 : ff60000002c54d98\n[  444.365060]  s5 : ffffffff81539610 s6 : ffffffff80c20c48 s7 : 0000000000000000\n[  444.365075]  s8 : 0000000000000000 s9 : 0000000000000001 s10: 0000000000000001\n[  444.365090]  s11: ffffffff80099394 t3 : 0000000000000003 t4 : 00000000eac0c6e6\n[  444.365104]  t5 : 0000000400000000 t6 : ff60000002e010d0\n[  444.365120] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003\n[  444.365226] [<ffffffff8009f9e0>] smp_call_function_many_cond+0x42c/0x436\n[  444.365295] [<ffffffff8009fa5a>] on_each_cpu_cond_mask+0x20/0x32\n[  444.365311] [<ffffffff806e90dc>] pmu_sbi_ctr_start+0x7a/0xaa\n[  444.365327] [<ffffffff806e880c>] riscv_pmu_start+0x48/0x66\n[  444.365339] [<ffffffff8012111a>] perf_adjust_freq_unthr_context+0x196/0x1ac\n[  444.365356] [<ffffffff801237aa>] perf_event_task_tick+0x78/0x8c\n[  444.365368] [<ffffffff8003faf4>] scheduler_tick+0xe6/0x25e\n[  444.365383] [<ffffffff8008a042>] update_process_times+0x80/0x96\n[  444.365398] [<ffffffff800991ec>] tick_sched_handle+0x26/0x52\n[  444.365410] [<ffffffff800993e4>] tick_sched_timer+0x50/0x98\n[  444.365422] [<ffffffff8008a6aa>] __hrtimer_run_queues+0x126/0x18a\n[  444.365433] [<ffffffff8008b350>] hrtimer_interrupt+0xce/0x1da\n[  444.365444] [<ffffffff806cdc60>] riscv_timer_interrupt+0x30/0x3a\n[  444.365457] [<ffffffff8006afa6>] handle_percpu_devid_irq+0x80/0x114\n[  444.365470] [<ffffffff80065b82>] generic_handle_domain_irq+0x1c/0x2a\n[  444.365483] [<ffffffff8045faec>] riscv_intc_irq+0x2e/0x46\n[  444.365497] [<ffffffff808a9c62>] handle_riscv_irq+0x4a/0x74\n[  444.365521] [<ffffffff808aa760>] do_irq+0x7c/0x7e\n[  444.365796] ---[ end trace 0000000000000000 ]---\n\nThat's because the fix in commit 3fec323339a4 (\"drivers: perf: Fix panic\nin riscv SBI mmap support\") was wrong since there is no need to broadcast\nto other cpus when starting a counter, that's only needed in mmap when\nthe counters could have already been started on other cpus, so simply\nremove this broadcast."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/perf/riscv_pmu_sbi.c"
               ],
               "versions": [
                  {
                     "version": "3fec323339a4",
                     "lessThan": "85be1a73fd29",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "3fec323339a4",
                     "lessThan": "61e3d993c8bd",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/perf/riscv_pmu_sbi.c"
               ],
               "versions": [
                  {
                     "version": "6.6",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.6",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.6.2",
                     "lessThanOrEqual": "6.6.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/85be1a73fd298ed3fd060dfce97caef5f9928c57"
            },
            {
               "url": "https://git.kernel.org/stable/c/61e3d993c8bd3e80f8f1363ed5e04f88ab531b72"
            }
         ],
         "title": "drivers: perf: Do not broadcast to other cpus when starting a counter",
         "x_generator": {
            "engine": "bippy-a5840b7849dd"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2023-52839",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}