[ 57.267808][ T26] audit: type=1800 audit(1573472823.793:26): pid=7920 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 57.302746][ T26] audit: type=1800 audit(1573472823.793:27): pid=7920 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 57.329027][ T26] audit: type=1800 audit(1573472823.793:28): pid=7920 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.391120][ T26] audit: type=1800 audit(1573472824.953:29): pid=7920 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.34' (ECDSA) to the list of known hosts. 2019/11/11 11:47:14 fuzzer started 2019/11/11 11:47:15 dialing manager at 10.128.0.105:33901 2019/11/11 11:47:16 syscalls: 2553 2019/11/11 11:47:16 code coverage: enabled 2019/11/11 11:47:16 comparison tracing: enabled 2019/11/11 11:47:16 extra coverage: extra coverage is not supported by the kernel 2019/11/11 11:47:16 setuid sandbox: enabled 2019/11/11 11:47:16 namespace sandbox: enabled 2019/11/11 11:47:16 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/11 11:47:16 fault injection: enabled 2019/11/11 11:47:16 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/11 11:47:16 net packet injection: enabled 2019/11/11 11:47:16 net device setup: enabled 2019/11/11 11:47:16 concurrency sanitizer: enabled 2019/11/11 11:47:16 devlink PCI setup: PCI device 0000:00:10.0 is not available syzkaller login: [ 77.167840][ C1] ================================================================== [ 77.175976][ C1] BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 [ 77.184884][ C1] [ 77.187614][ C1] write to 0xffffffff86043008 of 8 bytes by task 0 on cpu 0: [ 77.194999][ C1] tick_do_update_jiffies64+0x100/0x250 [ 77.201013][ C1] tick_irq_enter+0x139/0x1c0 [ 77.206218][ C1] irq_enter+0x4f/0x60 [ 77.210477][ C1] smp_apic_timer_interrupt+0x55/0x280 [ 77.215940][ C1] apic_timer_interrupt+0xf/0x20 [ 77.220865][ C1] native_safe_halt+0xe/0x10 [ 77.225837][ C1] arch_cpu_idle+0x1f/0x30 [ 77.231988][ C1] default_idle_call+0x1e/0x40 [ 77.237104][ C1] do_idle+0x1af/0x280 [ 77.241396][ C1] cpu_startup_entry+0x1b/0x20 [ 77.246898][ C1] rest_init+0xec/0xf6 [ 77.251512][ C1] arch_call_rest_init+0x17/0x37 [ 77.256672][ C1] start_kernel+0x838/0x85e [ 77.261443][ C1] x86_64_start_reservations+0x29/0x2b [ 77.267011][ C1] x86_64_start_kernel+0x72/0x76 [ 77.271961][ C1] secondary_startup_64+0xa4/0xb0 [ 77.277460][ C1] [ 77.280048][ C1] read to 0xffffffff86043008 of 8 bytes by interrupt on cpu 1: [ 77.287966][ C1] tick_do_update_jiffies64+0x2b/0x250 [ 77.293450][ C1] tick_sched_do_timer+0xd4/0xe0 [ 77.298491][ C1] tick_sched_timer+0x43/0xe0 [ 77.303375][ C1] __hrtimer_run_queues+0x274/0x5f0 [ 77.308571][ C1] hrtimer_interrupt+0x22a/0x480 [ 77.313533][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 77.318997][ C1] apic_timer_interrupt+0xf/0x20 [ 77.323922][ C1] kcsan_setup_watchpoint+0x205/0x410 [ 77.329277][ C1] __tsan_read1+0x13f/0x1e0 [ 77.333767][ C1] kallsyms_expand_symbol.constprop.0+0x103/0x160 [ 77.340188][ C1] kallsyms_lookup_name+0x7f/0x120 [ 77.345291][ C1] debugfs_write+0x14b/0x2d0 [ 77.349872][ C1] full_proxy_write+0xbd/0x100 [ 77.354617][ C1] __vfs_write+0x67/0xc0 [ 77.358848][ C1] vfs_write+0x18a/0x390 [ 77.363070][ C1] ksys_write+0xd5/0x1b0 [ 77.367319][ C1] __x64_sys_write+0x4c/0x60 [ 77.372173][ C1] do_syscall_64+0xcc/0x370 [ 77.376672][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.382555][ C1] [ 77.384863][ C1] Reported by Kernel Concurrency Sanitizer on: [ 77.391026][ C1] CPU: 1 PID: 8090 Comm: syz-executor Not tainted 5.4.0-rc6+ #0 [ 77.398916][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.409852][ C1] ================================================================== [ 77.418013][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 77.424617][ C1] CPU: 1 PID: 8090 Comm: syz-executor Not tainted 5.4.0-rc6+ #0 [ 77.432483][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.442977][ C1] Call Trace: [ 77.446247][ C1] [ 77.449107][ C1] dump_stack+0xf5/0x159 [ 77.453370][ C1] panic+0x210/0x640 [ 77.457361][ C1] ? vprintk_func+0x8d/0x140 [ 77.462122][ C1] kcsan_report.cold+0xc/0xe [ 77.466700][ C1] kcsan_setup_watchpoint+0x3fe/0x410 [ 77.472244][ C1] __tsan_read8+0x145/0x1f0 [ 77.476789][ C1] tick_do_update_jiffies64+0x2b/0x250 [ 77.482280][ C1] tick_sched_do_timer+0xd4/0xe0 [ 77.487224][ C1] tick_sched_timer+0x43/0xe0 [ 77.491927][ C1] __hrtimer_run_queues+0x274/0x5f0 [ 77.500169][ C1] ? tick_sched_handle+0x100/0x100 [ 77.505503][ C1] hrtimer_interrupt+0x22a/0x480 [ 77.510530][ C1] smp_apic_timer_interrupt+0xdc/0x280 [ 77.515982][ C1] ? smp_reschedule_interrupt+0x71/0x1d0 [ 77.521690][ C1] apic_timer_interrupt+0xf/0x20 [ 77.526604][ C1] [ 77.529735][ C1] RIP: 0010:kcsan_setup_watchpoint+0x205/0x410 [ 77.536545][ C1] Code: 5f 5d c3 83 ff 03 0f 85 ae fe ff ff bf 03 00 00 00 e8 7f 21 00 00 48 83 3d e7 c5 52 04 00 0f 84 24 01 00 00 48 8b 7d d0 57 9d <0f> 1f 44 00 00 eb c0 65 8b 05 75 ce ae 7e a9 00 01 1f 00 0f 84 4b [ 77.556665][ C1] RSP: 0018:ffffc90001657b98 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 77.566331][ C1] RAX: 0002ffff855d45cd RBX: 0000000000000000 RCX: ffffffff86046cc0 [ 77.575951][ C1] RDX: 0000000000000001 RSI: ffffffff824ef4b7 RDI: 0000000000000282 [ 77.584269][ C1] RBP: ffffc90001657bd8 R08: ffff888126fe6000 R09: 00000000aaaaaaab [ 77.592967][ C1] R10: 0000000000000000 R11: 00000000aaaaaaab R12: ffffffff855d45cd [ 77.602407][ C1] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000061 [ 77.612989][ C1] ? debug_smp_processor_id+0x47/0x172 [ 77.619287][ C1] __tsan_read1+0x13f/0x1e0 [ 77.624058][ C1] kallsyms_expand_symbol.constprop.0+0x103/0x160 [ 77.630565][ C1] kallsyms_lookup_name+0x7f/0x120 [ 77.635897][ C1] ? __check_object_size+0x5f/0x346 [ 77.641118][ C1] ? strlen+0x3b/0x60 [ 77.645103][ C1] debugfs_write+0x14b/0x2d0 [ 77.649699][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.655942][ C1] ? refcount_inc_not_zero_checked+0xba/0x150 [ 77.662007][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.668247][ C1] ? debugfs_file_get+0xae/0x1e0 [ 77.673172][ C1] full_proxy_write+0xbd/0x100 [ 77.678050][ C1] __vfs_write+0x67/0xc0 [ 77.682327][ C1] ? full_proxy_poll+0xf0/0xf0 [ 77.687364][ C1] vfs_write+0x18a/0x390 [ 77.691778][ C1] ksys_write+0xd5/0x1b0 [ 77.696283][ C1] __x64_sys_write+0x4c/0x60 [ 77.701019][ C1] do_syscall_64+0xcc/0x370 [ 77.705921][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 77.712038][ C1] RIP: 0033:0x413cd0 [ 77.715935][ C1] Code: b0 89 c8 f7 d8 eb ed b8 6e 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 3d 3d 43 66 00 00 75 14 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 c4 1b 00 00 c3 48 83 ec 08 e8 ca fc ff ff [ 77.740931][ C1] RSP: 002b:00007ffec396d248 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 77.751605][ C1] RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 0000000000413cd0 [ 77.760445][ C1] RDX: 0000000000000013 RSI: 000000000118c950 RDI: 0000000000000003 [ 77.768938][ C1] RBP: 000000000118c950 R08: 0000000000000100 R09: 0000000000000013 [ 77.777617][ C1] R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000013 [ 77.786606][ C1] R13: 0000000000000001 R14: 00007ffec396d2c0 R15: 0000000000000000 [ 77.797891][ C1] Kernel Offset: disabled [ 77.803083][ C1] Rebooting in 86400 seconds..