{"id":"CVE-2023-52839","summary":"drivers: perf: Do not broadcast to other cpus when starting a counter","details":"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] [\u003cffffffff8009f9e0\u003e] smp_call_function_many_cond+0x42c/0x436\n[  444.365295] [\u003cffffffff8009fa5a\u003e] on_each_cpu_cond_mask+0x20/0x32\n[  444.365311] [\u003cffffffff806e90dc\u003e] pmu_sbi_ctr_start+0x7a/0xaa\n[  444.365327] [\u003cffffffff806e880c\u003e] riscv_pmu_start+0x48/0x66\n[  444.365339] [\u003cffffffff8012111a\u003e] perf_adjust_freq_unthr_context+0x196/0x1ac\n[  444.365356] [\u003cffffffff801237aa\u003e] perf_event_task_tick+0x78/0x8c\n[  444.365368] [\u003cffffffff8003faf4\u003e] scheduler_tick+0xe6/0x25e\n[  444.365383] [\u003cffffffff8008a042\u003e] update_process_times+0x80/0x96\n[  444.365398] [\u003cffffffff800991ec\u003e] tick_sched_handle+0x26/0x52\n[  444.365410] [\u003cffffffff800993e4\u003e] tick_sched_timer+0x50/0x98\n[  444.365422] [\u003cffffffff8008a6aa\u003e] __hrtimer_run_queues+0x126/0x18a\n[  444.365433] [\u003cffffffff8008b350\u003e] hrtimer_interrupt+0xce/0x1da\n[  444.365444] [\u003cffffffff806cdc60\u003e] riscv_timer_interrupt+0x30/0x3a\n[  444.365457] [\u003cffffffff8006afa6\u003e] handle_percpu_devid_irq+0x80/0x114\n[  444.365470] [\u003cffffffff80065b82\u003e] generic_handle_domain_irq+0x1c/0x2a\n[  444.365483] [\u003cffffffff8045faec\u003e] riscv_intc_irq+0x2e/0x46\n[  444.365497] [\u003cffffffff808a9c62\u003e] handle_riscv_irq+0x4a/0x74\n[  444.365521] [\u003cffffffff808aa760\u003e] 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.","modified":"2026-04-02T09:43:25.177008Z","published":"2024-05-21T15:31:39.196Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52839.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/61e3d993c8bd3e80f8f1363ed5e04f88ab531b72"},{"type":"WEB","url":"https://git.kernel.org/stable/c/85be1a73fd298ed3fd060dfce97caef5f9928c57"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52839.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52839"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3fec323339a4a9801a54e8b282eb571965b67b23"},{"fixed":"85be1a73fd298ed3fd060dfce97caef5f9928c57"},{"fixed":"61e3d993c8bd3e80f8f1363ed5e04f88ab531b72"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52839.json"}}],"schema_version":"1.7.5"}