[ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts. 2020/09/18 13:23:23 fuzzer started 2020/09/18 13:23:24 dialing manager at 10.128.0.105:33891 2020/09/18 13:23:25 syscalls: 3334 2020/09/18 13:23:25 code coverage: enabled 2020/09/18 13:23:25 comparison tracing: enabled 2020/09/18 13:23:25 extra coverage: enabled 2020/09/18 13:23:25 setuid sandbox: enabled 2020/09/18 13:23:25 namespace sandbox: enabled 2020/09/18 13:23:25 Android sandbox: /sys/fs/selinux/policy does not exist 2020/09/18 13:23:25 fault injection: enabled 2020/09/18 13:23:25 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/09/18 13:23:25 net packet injection: enabled 2020/09/18 13:23:25 net device setup: enabled 2020/09/18 13:23:25 concurrency sanitizer: enabled 2020/09/18 13:23:25 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/09/18 13:23:25 USB emulation: enabled 2020/09/18 13:23:25 hci packet injection: enabled 2020/09/18 13:23:27 suppressing KCSAN reports in functions: 'blk_mq_rq_ctx_init' 'blk_mq_sched_dispatch_requests' '__ext4_new_inode' 'find_get_pages_range_tag' 'blk_mq_dispatch_rq_list' 'generic_file_buffered_read' 'sit_tunnel_xmit' 'ext4_mpage_readpages' 'ext4_sync_file' 'ext4_free_inode' 'do_nanosleep' 'ext4_writepages' 'generic_write_end' 'do_select' 'futex_wait_queue_me' '__xa_clear_mark' 'alloc_pid' '__mod_timer' 'dd_has_work' '__send_signal' 'xas_find_marked' 13:23:39 executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = socket(0x200000000000011, 0x3, 0x0) ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000100)={'macvlan0\x00', 0x0}) sendmsg$nl_route(r0, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000040)={&(0x7f0000000080)=@newlink={0x3c, 0x10, 0x1, 0x0, 0x0, {0x0, 0x0, 0x0, r2}, [@IFLA_LINKINFO={0x1c, 0x12, 0x0, 0x1, @macvlan={{0xc, 0x1, 'macvlan\x00'}, {0xc, 0x2, 0x0, 0x1, [@IFLA_MACVLAN_MODE={0x8, 0x1, 0x2}]}}}]}, 0x3c}}, 0x0) 13:23:39 executing program 1: unshare(0x2040400) r0 = syz_open_dev$evdev(&(0x7f0000000000)='/dev/input/event#\x00', 0x0, 0x0) ioctl$EVIOCSKEYCODE(r0, 0x40084504, &(0x7f0000000100)) 13:23:39 executing program 2: r0 = openat$ashmem(0xffffffffffffff9c, &(0x7f0000000000)='/dev/ashmem\x00', 0x0, 0x0) ioctl$ASHMEM_SET_SIZE(r0, 0x40087703, 0x100000002) mmap(&(0x7f0000701000/0x1000)=nil, 0x1000, 0x0, 0x12, r0, 0x0) ioctl$ASHMEM_SET_NAME(r0, 0x40087708, &(0x7f00000011c0)) ioctl$ASHMEM_SET_NAME(r0, 0x7709, &(0x7f00000011c0)) 13:23:39 executing program 3: r0 = syz_open_dev$radio(&(0x7f0000000480)='/dev/radio#\x00', 0x2, 0x2) r1 = socket$packet(0x11, 0x3, 0x300) r2 = dup(r1) ioctl$PERF_EVENT_IOC_ENABLE(r2, 0x8912, 0x400200) readv(r0, &(0x7f0000000140)=[{0x0}, {&(0x7f0000000040)=""/182, 0xb6}], 0x2) 13:23:39 executing program 4: r0 = socket(0x10, 0x3, 0x0) setsockopt$netlink_NETLINK_TX_RING(r0, 0x10e, 0xc, &(0x7f0000000000)={0x3f}, 0x10) write(r0, &(0x7f0000000080)="240000001a005f0214f9f4075d09040e0a00000009000000000200000800040001000000", 0x24) 13:23:40 executing program 5: r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000001c0)='/dev/ptmx\x00', 0x0, 0x0) ioctl$TCSETS(r0, 0x40045431, &(0x7f0000000080)={0x0, 0x0, 0x0, 0x0, 0x0, "02000200000006b5b6c943044900cd9400"}) ioctl$TIOCPKT(r0, 0x5420, &(0x7f0000000140)=0x80000004) r1 = syz_open_pts(r0, 0x0) ioctl$TCFLSH(r1, 0x540b, 0x0) syzkaller login: [ 50.074815][ T0] ================================================================== [ 50.083097][ T0] BUG: KCSAN: data-race in tick_nohz_next_event / tick_nohz_stop_tick [ 50.091251][ T0] [ 50.093572][ T0] write to 0xffffffff88164590 of 4 bytes by task 0 on cpu 1: [ 50.100912][ T0] tick_nohz_stop_tick+0xa0/0x440 [ 50.105921][ T0] tick_nohz_idle_stop_tick+0xf2/0x1c0 [ 50.111347][ T0] do_idle+0x1ca/0x2c0 [ 50.115385][ T0] cpu_startup_entry+0x15/0x20 [ 50.120118][ T0] secondary_startup_64+0xa4/0xb0 [ 50.125117][ T0] [ 50.127418][ T0] read to 0xffffffff88164590 of 4 bytes by task 0 on cpu 0: [ 50.134686][ T0] tick_nohz_next_event+0x21d/0x310 [ 50.139870][ T0] tick_nohz_get_sleep_length+0xca/0x140 [ 50.145493][ T0] menu_select+0x328/0x1030 [ 50.149992][ T0] cpuidle_select+0x3d/0x50 [ 50.154488][ T0] do_idle+0x1ae/0x2c0 [ 50.158541][ T0] cpu_startup_entry+0x15/0x20 [ 50.163274][ T0] rest_init+0xd8/0xe0 [ 50.167313][ T0] arch_call_rest_init+0xa/0xb [ 50.172057][ T0] start_kernel+0x608/0x6d0 [ 50.176542][ T0] secondary_startup_64+0xa4/0xb0 [ 50.181539][ T0] [ 50.183845][ T0] Reported by Kernel Concurrency Sanitizer on: [ 50.189976][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc5-syzkaller #0 [ 50.197841][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.207884][ T0] ================================================================== [ 50.215915][ T0] Kernel panic - not syncing: panic_on_warn set ... [ 50.222471][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc5-syzkaller #0 [ 50.230334][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.240371][ T0] Call Trace: [ 50.243646][ T0] dump_stack+0x10f/0x19d [ 50.247943][ T0] panic+0x207/0x64a [ 50.251811][ T0] ? vprintk_emit+0x44a/0x4f0 [ 50.256461][ T0] kcsan_report+0x684/0x690 [ 50.260948][ T0] ? kcsan_setup_watchpoint+0x41e/0x4a0 [ 50.266461][ T0] ? tick_nohz_next_event+0x21d/0x310 [ 50.271802][ T0] ? tick_nohz_get_sleep_length+0xca/0x140 [ 50.277591][ T0] ? menu_select+0x328/0x1030 [ 50.282236][ T0] ? cpuidle_select+0x3d/0x50 [ 50.286884][ T0] ? do_idle+0x1ae/0x2c0 [ 50.291095][ T0] ? cpu_startup_entry+0x15/0x20 [ 50.296004][ T0] ? rest_init+0xd8/0xe0 [ 50.300216][ T0] ? arch_call_rest_init+0xa/0xb [ 50.305133][ T0] ? start_kernel+0x608/0x6d0 [ 50.309782][ T0] ? secondary_startup_64+0xa4/0xb0 [ 50.314964][ T0] kcsan_setup_watchpoint+0x41e/0x4a0 [ 50.320315][ T0] tick_nohz_next_event+0x21d/0x310 [ 50.325503][ T0] tick_nohz_get_sleep_length+0xca/0x140 [ 50.331109][ T0] menu_select+0x328/0x1030 [ 50.335602][ T0] ? debug_smp_processor_id+0x18/0x20 [ 50.340962][ T0] ? sched_idle_set_state+0x9/0x20 [ 50.346045][ T0] ? debug_smp_processor_id+0x18/0x20 [ 50.351387][ T0] ? tick_nohz_idle_got_tick+0x67/0x80 [ 50.356826][ T0] cpuidle_select+0x3d/0x50 [ 50.361301][ T0] do_idle+0x1ae/0x2c0 [ 50.365340][ T0] cpu_startup_entry+0x15/0x20 [ 50.370072][ T0] rest_init+0xd8/0xe0 [ 50.374123][ T0] ? time_init+0xc/0xc [ 50.378163][ T0] arch_call_rest_init+0xa/0xb [ 50.382916][ T0] start_kernel+0x608/0x6d0 [ 50.387391][ T0] secondary_startup_64+0xa4/0xb0 [ 50.393457][ T0] Kernel Offset: disabled [ 50.397768][ T0] Rebooting in 86400 seconds..