Warning: Permanently added '10.128.1.8' (ECDSA) to the list of known hosts. 2020/05/05 12:16:31 fuzzer started 2020/05/05 12:16:31 dialing manager at 10.128.0.105:46259 2020/05/05 12:16:31 checking machine... 2020/05/05 12:16:31 checking revisions... 2020/05/05 12:16:31 testing simple program... syzkaller login: [ 43.416373][ T6686] ================================================================== [ 43.424519][ T6686] BUG: KCSAN: data-race in ep_insert / ep_poll [ 43.430661][ T6686] [ 43.432991][ T6686] write to 0xffff8881264bbdd8 of 8 bytes by task 6692 on cpu 0: [ 43.440624][ T6686] ep_insert+0xb7d/0xcf0 [ 43.444867][ T6686] do_epoll_ctl+0x72c/0xf90 [ 43.449453][ T6686] __x64_sys_epoll_ctl+0xb4/0x100 [ 43.454567][ T6686] do_syscall_64+0xc7/0x3b0 [ 43.459075][ T6686] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 43.464957][ T6686] [ 43.467289][ T6686] read to 0xffff8881264bbdd8 of 8 bytes by task 6686 on cpu 1: [ 43.475263][ T6686] ep_poll+0x74b/0x910 [ 43.479330][ T6686] do_epoll_wait+0x15a/0x180 [ 43.484033][ T6686] __x64_sys_epoll_pwait+0xc6/0x170 [ 43.489229][ T6686] do_syscall_64+0xc7/0x3b0 [ 43.493730][ T6686] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 43.496761][ T6704] IPVS: ftp: loaded support on port[0] = 21 [ 43.499830][ T6686] [ 43.508881][ T6686] Reported by Kernel Concurrency Sanitizer on: [ 43.515035][ T6686] CPU: 1 PID: 6686 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 43.523386][ T6686] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.533442][ T6686] ================================================================== [ 43.541842][ T6686] Kernel panic - not syncing: panic_on_warn set ... [ 43.548444][ T6686] CPU: 1 PID: 6686 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 [ 43.556858][ T6686] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.567335][ T6686] Call Trace: [ 43.570626][ T6686] dump_stack+0x11d/0x187 [ 43.575220][ T6686] panic+0x210/0x640 [ 43.579117][ T6686] ? vprintk_func+0x89/0x13a [ 43.583710][ T6686] kcsan_report.cold+0xc/0x1a [ 43.588392][ T6686] kcsan_setup_watchpoint+0x3fb/0x440 [ 43.593938][ T6686] ep_poll+0x74b/0x910 [ 43.598058][ T6686] ? wake_up_q+0x90/0x90 [ 43.602392][ T6686] do_epoll_wait+0x15a/0x180 [ 43.607079][ T6686] __x64_sys_epoll_pwait+0xc6/0x170 [ 43.612284][ T6686] do_syscall_64+0xc7/0x3b0 [ 43.616808][ T6686] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 43.622791][ T6686] RIP: 0033:0x45b300 [ 43.626690][ T6686] 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 [ 43.646558][ T6686] RSP: 002b:00007ffcc515eaf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 [ 43.654967][ T6686] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000045b300 [ 43.663022][ T6686] RDX: 0000000000000080 RSI: 00007ffcc515eb38 RDI: 0000000000000004 [ 43.671248][ T6686] RBP: 00007ffcc515f138 R08: 0000000000000000 R09: 000000000149c4e0 [ 43.679432][ T6686] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000040 [ 43.687404][ T6686] R13: 0000000000000040 R14: 00000000000000ff R15: 000000000000000f [ 43.696856][ T6686] Kernel Offset: disabled [ 43.701176][ T6686] Rebooting in 86400 seconds..