[ 35.533152][ T25] audit: type=1800 audit(1572772975.123:25): pid=6983 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 35.552989][ T25] audit: type=1800 audit(1572772975.123:26): pid=6983 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 35.573080][ T25] audit: type=1800 audit(1572772975.123:27): pid=6983 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 35.937241][ T7048] sshd (7048) used greatest stack depth: 10136 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.54' (ECDSA) to the list of known hosts. 2019/11/03 09:23:02 fuzzer started 2019/11/03 09:23:03 dialing manager at 10.128.0.105:43165 2019/11/03 09:23:03 checking machine... 2019/11/03 09:23:03 checking revisions... 2019/11/03 09:23:03 testing simple program... syzkaller login: [ 44.390338][ T7151] IPVS: ftp: loaded support on port[0] = 21 [ 44.426538][ C0] ================================================================== [ 44.434668][ C0] BUG: KCSAN: data-race in tick_sched_do_timer / tick_sched_do_timer [ 44.442740][ C0] [ 44.445068][ C0] write to 0xffffffff85cb2790 of 4 bytes by interrupt on cpu 1: [ 44.452699][ C0] tick_sched_do_timer+0xc0/0xe0 [ 44.457632][ C0] tick_sched_timer+0x43/0xe0 [ 44.462307][ C0] __hrtimer_run_queues+0x288/0x600 [ 44.467494][ C0] hrtimer_interrupt+0x22a/0x480 [ 44.472516][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 44.477980][ C0] apic_timer_interrupt+0xf/0x20 [ 44.482912][ C0] __kcsan_check_watchpoint+0xa2/0x180 [ 44.488345][ C0] __tsan_read8+0x15/0x30 [ 44.492649][ C0] tomoyo_domain_quota_is_ok+0xce/0x2b0 [ 44.498186][ C0] tomoyo_supervisor+0x22b/0xd20 [ 44.503548][ C0] tomoyo_path_permission+0x121/0x160 [ 44.508896][ C0] tomoyo_check_open_permission+0x2fd/0x320 [ 44.514773][ C0] tomoyo_file_open+0x75/0x90 [ 44.519424][ C0] security_file_open+0x69/0x210 [ 44.524329][ C0] [ 44.526638][ C0] read to 0xffffffff85cb2790 of 4 bytes by interrupt on cpu 0: [ 44.534165][ C0] tick_sched_do_timer+0x33/0xe0 [ 44.539339][ C0] tick_sched_timer+0x43/0xe0 [ 44.544425][ C0] __hrtimer_run_queues+0x288/0x600 [ 44.549595][ C0] hrtimer_interrupt+0x22a/0x480 [ 44.554510][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 44.560649][ C0] apic_timer_interrupt+0xf/0x20 [ 44.565573][ C0] write_comp_data+0x1e/0x70 [ 44.570136][ C0] copy_page_range+0xfed/0x1a80 [ 44.574973][ C0] dup_mm+0x74a/0xba0 [ 44.578936][ C0] copy_process+0x36f3/0x3b50 [ 44.583592][ C0] _do_fork+0xfe/0x6e0 [ 44.587641][ C0] __x64_sys_clone+0x12b/0x160 [ 44.592404][ C0] do_syscall_64+0xcc/0x370 [ 44.596893][ C0] [ 44.599196][ C0] Reported by Kernel Concurrency Sanitizer on: [ 44.605454][ C0] CPU: 0 PID: 7151 Comm: syz-executor.0 Not tainted 5.4.0-rc3+ #0 [ 44.613230][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.623281][ C0] ================================================================== [ 44.631316][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 44.637879][ C0] CPU: 0 PID: 7151 Comm: syz-executor.0 Not tainted 5.4.0-rc3+ #0 [ 44.645828][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.655858][ C0] Call Trace: [ 44.659118][ C0] [ 44.661965][ C0] dump_stack+0xf5/0x159 [ 44.666196][ C0] panic+0x210/0x640 [ 44.670074][ C0] ? dup_mm+0x74a/0xba0 [ 44.674217][ C0] ? vprintk_func+0x8d/0x140 [ 44.678881][ C0] kcsan_report.cold+0xc/0x10 [ 44.683543][ C0] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 44.689073][ C0] __tsan_read4+0x2c/0x30 [ 44.693385][ C0] tick_sched_do_timer+0x33/0xe0 [ 44.698306][ C0] tick_sched_timer+0x43/0xe0 [ 44.702967][ C0] __hrtimer_run_queues+0x288/0x600 [ 44.708159][ C0] ? tick_sched_do_timer+0xe0/0xe0 [ 44.713249][ C0] hrtimer_interrupt+0x22a/0x480 [ 44.718258][ C0] smp_apic_timer_interrupt+0xdc/0x280 [ 44.723693][ C0] ? smp_reschedule_interrupt+0x71/0x1d0 [ 44.729300][ C0] apic_timer_interrupt+0xf/0x20 [ 44.734209][ C0] [ 44.737131][ C0] RIP: 0010:write_comp_data+0x1e/0x70 [ 44.742488][ C0] Code: 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 6c 01 00 65 8b 05 c8 a3 bb 7e a9 00 01 1f 00 75 51 41 8b 80 08 0a 00 00 <83> f8 03 75 45 49 8b 80 10 0a 00 00 45 8b 80 0c 0a 00 00 4c 8b 08 [ 44.762113][ C0] RSP: 0018:ffffc900016efa60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 44.770953][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff815f560d [ 44.778975][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 44.787103][ C0] RBP: ffffc900016efa68 R08: ffff88812351d080 R09: 0000c900016efbbb [ 44.795157][ C0] R10: 00000000aaaaaaab R11: ffffffff86045d90 R12: 0000000000000030 [ 44.803108][ C0] R13: 00007f3bb7e00000 R14: 0000000000000000 R15: 0000000000000020 [ 44.811073][ C0] ? copy_page_range+0xfed/0x1a80 [ 44.816102][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.822332][ C0] copy_page_range+0xfed/0x1a80 [ 44.827168][ C0] ? __tsan_write8+0x32/0x40 [ 44.831815][ C0] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 44.838294][ C0] ? __vma_link_rb+0x3f4/0x440 [ 44.843084][ C0] dup_mm+0x74a/0xba0 [ 44.847054][ C0] copy_process+0x36f3/0x3b50 [ 44.851737][ C0] _do_fork+0xfe/0x6e0 [ 44.855791][ C0] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 44.861404][ C0] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 44.867013][ C0] ? __tsan_read8+0x2c/0x30 [ 44.871498][ C0] __x64_sys_clone+0x12b/0x160 [ 44.876246][ C0] do_syscall_64+0xcc/0x370 [ 44.880749][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.886616][ C0] RIP: 0033:0x45851a [ 44.890502][ C0] Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 [ 44.910140][ C0] RSP: 002b:00007ffe1970a450 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 44.918530][ C0] RAX: ffffffffffffffda RBX: 00007ffe1970a450 RCX: 000000000045851a [ 44.926483][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 44.934442][ C0] RBP: 00007ffe1970a490 R08: 0000000000000001 R09: 000000000157c940 [ 44.942395][ C0] R10: 000000000157cc10 R11: 0000000000000246 R12: 0000000000000001 [ 44.950784][ C0] R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe1970a4e0 [ 44.960351][ C0] Kernel Offset: disabled [ 44.964684][ C0] Rebooting in 86400 seconds..