ghsa-r823-qmw9-v7xf
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
drivers: perf: Do not broadcast to other cpus when starting a counter
This command:
$ perf record -e cycles:k -e instructions:k -c 10000 -m 64M dd if=/dev/zero of=/dev/null count=1000
gives rise to this kernel warning:
[ 444.364395] WARNING: CPU: 0 PID: 104 at kernel/smp.c:775 smp_call_function_many_cond+0x42c/0x436
[ 444.364515] Modules linked in:
[ 444.364657] CPU: 0 PID: 104 Comm: perf-exec Not tainted 6.6.0-rc6-00051-g391df82e8ec3-dirty #73
[ 444.364771] Hardware name: riscv-virtio,qemu (DT)
[ 444.364868] epc : smp_call_function_many_cond+0x42c/0x436
[ 444.364917] ra : on_each_cpu_cond_mask+0x20/0x32
[ 444.364948] epc : ffffffff8009f9e0 ra : ffffffff8009fa5a sp : ff20000000003800
[ 444.364966] gp : ffffffff81500aa0 tp : ff60000002b83000 t0 : ff200000000038c0
[ 444.364982] t1 : ffffffff815021f0 t2 : 000000000000001f s0 : ff200000000038b0
[ 444.364998] s1 : ff60000002c54d98 a0 : ff60000002a73940 a1 : 0000000000000000
[ 444.365013] a2 : 0000000000000000 a3 : 0000000000000003 a4 : 0000000000000100
[ 444.365029] a5 : 0000000000010100 a6 : 0000000000f00000 a7 : 0000000000000000
[ 444.365044] s2 : 0000000000000000 s3 : ffffffffffffffff s4 : ff60000002c54d98
[ 444.365060] s5 : ffffffff81539610 s6 : ffffffff80c20c48 s7 : 0000000000000000
[ 444.365075] s8 : 0000000000000000 s9 : 0000000000000001 s10: 0000000000000001
[ 444.365090] s11: ffffffff80099394 t3 : 0000000000000003 t4 : 00000000eac0c6e6
[ 444.365104] t5 : 0000000400000000 t6 : ff60000002e010d0
[ 444.365120] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003
[ 444.365226] [
That's because the fix in commit 3fec323339a4 ("drivers: perf: Fix panic in riscv SBI mmap support") was wrong since there is no need to broadcast to other cpus when starting a counter, that's only needed in mmap when the counters could have already been started on other cpus, so simply remove this broadcast.
{
"affected": [],
"aliases": [
"CVE-2023-52839"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T16:15:21Z",
"severity": null
},
"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\u0027s 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\u0027s only needed in mmap when\nthe counters could have already been started on other cpus, so simply\nremove this broadcast.",
"id": "GHSA-r823-qmw9-v7xf",
"modified": "2024-05-21T18:31:22Z",
"published": "2024-05-21T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52839"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/61e3d993c8bd3e80f8f1363ed5e04f88ab531b72"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/85be1a73fd298ed3fd060dfce97caef5f9928c57"
}
],
"schema_version": "1.4.0",
"severity": []
}