[info] Using makefile-style concurrent boot in runlevel 2. [ 45.371983][ T26] audit: type=1800 audit(1574797399.685:21): pid=7550 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 45.424402][ T26] audit: type=1800 audit(1574797399.685:22): pid=7550 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 '10.128.1.16' (ECDSA) to the list of known hosts. 2019/11/26 19:43:30 fuzzer started 2019/11/26 19:43:32 connecting to host at 10.128.0.105:39947 2019/11/26 19:43:32 checking machine... 2019/11/26 19:43:32 checking revisions... 2019/11/26 19:43:32 testing simple program... syzkaller login: [ 58.274438][ T7707] ================================================================== [ 58.282778][ T7707] BUG: KCSAN: data-race in ep_insert / ep_poll [ 58.288905][ T7707] [ 58.291216][ T7707] write to 0xffff8881259851d8 of 8 bytes by task 7704 on cpu 1: [ 58.298834][ T7707] ep_insert+0xb7d/0xcf0 [ 58.303060][ T7707] __x64_sys_epoll_ctl+0x97e/0xa40 [ 58.308222][ T7707] do_syscall_64+0xcc/0x370 [ 58.312771][ T7707] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.318652][ T7707] [ 58.320989][ T7707] read to 0xffff8881259851d8 of 8 bytes by task 7707 on cpu 0: [ 58.328553][ T7707] ep_poll+0x73c/0x900 [ 58.332627][ T7707] do_epoll_wait+0x162/0x180 [ 58.337227][ T7707] __x64_sys_epoll_pwait+0xcd/0x180 [ 58.342428][ T7707] do_syscall_64+0xcc/0x370 [ 58.346937][ T7707] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.352822][ T7707] [ 58.355162][ T7707] Reported by Kernel Concurrency Sanitizer on: [ 58.361319][ T7707] CPU: 0 PID: 7707 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 58.369203][ T7707] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.379272][ T7707] ================================================================== [ 58.387338][ T7707] Kernel panic - not syncing: panic_on_warn set ... [ 58.393928][ T7707] CPU: 0 PID: 7707 Comm: syz-fuzzer Not tainted 5.4.0-syzkaller #0 [ 58.401809][ T7707] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.405145][ T7720] IPVS: ftp: loaded support on port[0] = 21 [ 58.411979][ T7707] Call Trace: [ 58.412010][ T7707] dump_stack+0x11d/0x181 [ 58.412032][ T7707] panic+0x210/0x640 [ 58.412057][ T7707] ? vprintk_func+0x8d/0x140 [ 58.412087][ T7707] kcsan_report.cold+0xc/0xd [ 58.438582][ T7707] kcsan_setup_watchpoint+0x3fe/0x460 [ 58.443978][ T7707] __tsan_read8+0xc6/0x100 [ 58.448400][ T7707] ep_poll+0x73c/0x900 [ 58.452479][ T7707] ? wake_up_q+0x70/0x70 [ 58.456722][ T7707] do_epoll_wait+0x162/0x180 [ 58.461309][ T7707] ? debug_smp_processor_id+0x4c/0x172 [ 58.466770][ T7707] __x64_sys_epoll_pwait+0xcd/0x180 [ 58.471977][ T7707] do_syscall_64+0xcc/0x370 [ 58.476494][ T7707] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 58.482422][ T7707] RIP: 0033:0x45b300 [ 58.486323][ T7707] 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 [ 58.506144][ T7707] RSP: 002b:000000c42014b858 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 [ 58.514583][ T7707] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000045b300 [ 58.522578][ T7707] RDX: 0000000000000080 RSI: 000000c42014b898 RDI: 0000000000000004 [ 58.530533][ T7707] RBP: 000000c42014be98 R08: 0000000000000000 R09: 000000c420001800 [ 58.538484][ T7707] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000040 [ 58.546446][ T7707] R13: 0000000000000040 R14: 00000000000000ff R15: 000000000000000f [ 58.555744][ T7707] Kernel Offset: disabled [ 58.560067][ T7707] Rebooting in 86400 seconds..