[info] Using makefile-style concurrent boot in runlevel 2. [ 41.025647][ T26] audit: type=1800 audit(1575746289.833:21): pid=7326 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 41.064511][ T26] audit: type=1800 audit(1575746289.833:22): pid=7326 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.236' (ECDSA) to the list of known hosts. 2019/12/07 19:18:17 fuzzer started 2019/12/07 19:18:18 dialing manager at 10.128.0.105:38631 2019/12/07 19:18:18 syscalls: 2689 2019/12/07 19:18:18 code coverage: enabled 2019/12/07 19:18:18 comparison tracing: enabled 2019/12/07 19:18:18 extra coverage: extra coverage is not supported by the kernel 2019/12/07 19:18:18 setuid sandbox: enabled 2019/12/07 19:18:18 namespace sandbox: enabled 2019/12/07 19:18:18 Android sandbox: /sys/fs/selinux/policy does not exist 2019/12/07 19:18:18 fault injection: enabled 2019/12/07 19:18:18 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/12/07 19:18:18 net packet injection: enabled 2019/12/07 19:18:18 net device setup: enabled 2019/12/07 19:18:18 concurrency sanitizer: enabled 2019/12/07 19:18:18 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/12/07 19:18:18 adding functions to KCSAN blacklist: 'tomoyo_supervisor' '__hrtimer_run_queues' 'rcu_gp_fqs_check_wake' 19:18:20 executing program 0: socketpair(0x8000000000001e, 0x5, 0x0, &(0x7f000000dff8)={0xffffffffffffffff, 0xffffffffffffffff}) writev(r0, &(0x7f0000000240)=[{&(0x7f0000000140)="a3", 0x1}], 0x1) r2 = socket$inet6(0xa, 0x80003, 0x6b) ioctl(r2, 0x1000008912, &(0x7f00000001c0)="0805b5055e0bcfe8474071") write(r0, 0x0, 0x0) setsockopt$sock_int(r1, 0x1, 0x8, &(0x7f0000785000), 0x34a) writev(r0, &(0x7f000063e000)=[{&(0x7f0000a66000)="da", 0x1}], 0x1) sendmmsg$alg(r1, &(0x7f0000236fc8), 0x1f8, 0x0) syzkaller login: [ 51.378380][ T7472] ================================================================== [ 51.386608][ T7472] BUG: KCSAN: data-race in ep_insert / ep_poll [ 51.392735][ T7472] [ 51.395043][ T7472] write to 0xffff888123150f58 of 8 bytes by task 7477 on cpu 0: [ 51.402683][ T7472] ep_insert+0xb7d/0xcf0 [ 51.406938][ T7472] __x64_sys_epoll_ctl+0x97e/0xa40 [ 51.412064][ T7472] do_syscall_64+0xcc/0x370 [ 51.416585][ T7472] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.422484][ T7472] [ 51.424800][ T7472] read to 0xffff888123150f58 of 8 bytes by task 7472 on cpu 1: [ 51.432343][ T7472] ep_poll+0x34d/0x900 [ 51.436394][ T7472] do_epoll_wait+0x162/0x180 [ 51.441004][ T7472] __x64_sys_epoll_pwait+0xcd/0x180 [ 51.446192][ T7472] do_syscall_64+0xcc/0x370 [ 51.450682][ T7472] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.456560][ T7472] [ 51.458867][ T7472] Reported by Kernel Concurrency Sanitizer on: [ 51.465041][ T7472] CPU: 1 PID: 7472 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 51.472907][ T7472] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.482941][ T7472] ================================================================== [ 51.490979][ T7472] Kernel panic - not syncing: panic_on_warn set ... [ 51.497543][ T7472] CPU: 1 PID: 7472 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 51.505419][ T7472] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.515451][ T7472] Call Trace: [ 51.518735][ T7472] dump_stack+0x11d/0x181 [ 51.523054][ T7472] panic+0x210/0x640 [ 51.526931][ T7472] ? vprintk_func+0x8d/0x140 [ 51.531514][ T7472] kcsan_report.cold+0xc/0xd [ 51.536211][ T7472] kcsan_setup_watchpoint+0x3fe/0x460 [ 51.541598][ T7472] __tsan_read8+0xc6/0x100 [ 51.546025][ T7472] ep_poll+0x34d/0x900 [ 51.550093][ T7472] ? __fget+0xb8/0x1d0 [ 51.554167][ T7472] ? __fget_light+0xaf/0x190 [ 51.558766][ T7472] do_epoll_wait+0x162/0x180 [ 51.563361][ T7472] ? debug_smp_processor_id+0x4c/0x172 [ 51.568838][ T7472] __x64_sys_epoll_pwait+0xcd/0x180 [ 51.574055][ T7472] do_syscall_64+0xcc/0x370 [ 51.578578][ T7472] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 51.584468][ T7472] RIP: 0033:0x45b300 [ 51.588385][ T7472] Code: 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 49 c7 c0 00 00 00 00 b8 19 01 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 c7 [ 51.608003][ T7472] RSP: 002b:00007ffe228e1d40 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 [ 51.616417][ T7472] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000045b300 [ 51.624391][ T7472] RDX: 0000000000000080 RSI: 00007ffe228e1d80 RDI: 0000000000000004 [ 51.632363][ T7472] RBP: 00007ffe228e2380 R08: 0000000000000000 R09: 000000000190a040 [ 51.640341][ T7472] R10: 00000000ffffffff R11: 0000000000000246 R12: 000000c4205340f8 [ 51.648310][ T7472] R13: 000000000000000f R14: 0000000000c28dc0 R15: 0000000000000a01 [ 51.657697][ T7472] Kernel Offset: disabled [ 51.662035][ T7472] Rebooting in 86400 seconds..