[ OK ] Found device /dev/ttyS0. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.96' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.469319] FAULT_INJECTION: forcing a failure. [ 27.469319] name failslab, interval 1, probability 0, space 0, times 1 [ 27.480644] CPU: 0 PID: 7974 Comm: syz-executor297 Not tainted 4.14.281-syzkaller #0 [ 27.488517] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.497849] Call Trace: [ 27.500427] dump_stack+0x1b2/0x281 [ 27.504035] should_fail.cold+0x10a/0x149 [ 27.508167] should_failslab+0xd6/0x130 [ 27.512116] __kmalloc+0x2c1/0x400 [ 27.515633] ? tracepoint_add_func+0x33f/0xa40 [ 27.520319] ? blk_add_trace_bio_backmerge+0x120/0x120 [ 27.525578] tracepoint_add_func+0x33f/0xa40 [ 27.529969] ? blk_add_trace_bio_backmerge+0x120/0x120 [ 27.535238] tracepoint_probe_register+0x8c/0xc0 [ 27.539978] ? for_each_kernel_tracepoint+0x80/0x80 [ 27.544980] ? blk_add_trace_bio_backmerge+0x120/0x120 [ 27.550231] ? debugfs_create_file+0x37/0x60 [ 27.554624] blk_register_tracepoints+0x108/0x2f0 [ 27.559440] do_blk_trace_setup+0x8a1/0xac0 [ 27.563738] __blk_trace_setup+0xa3/0x120 [ 27.567858] ? do_blk_trace_setup+0xac0/0xac0 [ 27.572331] blk_trace_setup+0x43/0x60 [ 27.576197] sg_ioctl+0x232/0x2620 [ 27.579722] ? proc_fail_nth_write+0x7b/0x180 [ 27.584196] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 27.589105] ? sg_write+0x90/0x90 [ 27.592536] ? fsnotify+0x974/0x11b0 [ 27.596222] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 27.601211] ? debug_check_no_obj_freed+0x2c0/0x680 [ 27.606202] ? sg_write+0x90/0x90 [ 27.609630] do_vfs_ioctl+0x75a/0xff0 [ 27.613414] ? ioctl_preallocate+0x1a0/0x1a0 [ 27.617798] ? vfs_write+0x319/0x4d0 [ 27.621496] ? SyS_write+0x14d/0x210 [ 27.625190] ? security_file_ioctl+0x83/0xb0 [ 27.629572] SyS_ioctl+0x7f/0xb0 [ 27.632915] ? do_vfs_ioctl+0xff0/0xff0 [ 27.636882] do_syscall_64+0x1d5/0x640 [ 27.640752] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.645931] RIP: 0033:0x7fc1f83b9cd9 [ 27.649614] RSP: 002b:00007ffd15e459d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 27.657296] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc1f83b9cd9 [ 27.664541] RDX: 0000000020000140 RSI: 00000000c0481273 RDI: 0000000000000003 [ 27.671870] RBP: 00007ffd15e459e0 R08: 0000000000000002 R09: 00007fc1f8003833 [ 27.679112] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 27.686367] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.700891] ------------[ cut here ]------------ [ 27.700912] WARNING: CPU: 1 PID: 7974 at kernel/trace/blktrace.c:1190 blk_register_tracepoints+0x27e/0x2f0 [ 27.700918] Kernel panic - not syncing: panic_on_warn set ... [ 27.700918] [ 27.700926] CPU: 1 PID: 7974 Comm: syz-executor297 Not tainted 4.14.281-syzkaller #0 [ 27.700933] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.740117] Call Trace: [ 27.742697] dump_stack+0x1b2/0x281 [ 27.746302] panic+0x1f9/0x42d [ 27.749469] ? add_taint.cold+0x16/0x16 [ 27.753417] ? blk_register_tracepoints+0x27e/0x2f0 [ 27.758406] ? blk_register_tracepoints+0x27e/0x2f0 [ 27.763408] __warn.cold+0x20/0x44 [ 27.766935] ? ist_end_non_atomic+0x10/0x10 [ 27.771232] ? blk_register_tracepoints+0x27e/0x2f0 [ 27.776224] report_bug+0x208/0x250 [ 27.779848] do_error_trap+0x195/0x2d0 [ 27.783715] ? math_error+0x2d0/0x2d0 [ 27.787500] ? lock_downgrade+0x740/0x740 [ 27.791641] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 27.796632] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.801452] invalid_op+0x1b/0x40 [ 27.804895] RIP: 0010:blk_register_tracepoints+0x27e/0x2f0 [ 27.810487] RSP: 0018:ffff888098377b20 EFLAGS: 00010297 [ 27.815872] RAX: ffff8880995e6680 RBX: ffff8880ac70a780 RCX: fffffbfff17da3a8 [ 27.823124] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000282 [ 27.830368] RBP: ffff8880ae6bc240 R08: ffff8880995e6680 R09: dffffc0000000000 [ 27.837612] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff0 [ 27.844858] R13: ffff8880ae6bc270 R14: 0000000000000000 R15: 0000000000000000 [ 27.852111] do_blk_trace_setup+0x8a1/0xac0 [ 27.856427] __blk_trace_setup+0xa3/0x120 [ 27.860558] ? do_blk_trace_setup+0xac0/0xac0 [ 27.865036] blk_trace_setup+0x43/0x60 [ 27.868911] sg_ioctl+0x232/0x2620 [ 27.872426] ? proc_fail_nth_write+0x7b/0x180 [ 27.876896] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 27.881797] ? sg_write+0x90/0x90 [ 27.885227] ? fsnotify+0x974/0x11b0 [ 27.888914] ? proc_tgid_io_accounting+0x7a0/0x7a0 [ 27.893818] ? debug_check_no_obj_freed+0x2c0/0x680 [ 27.898821] ? sg_write+0x90/0x90 [ 27.902253] do_vfs_ioctl+0x75a/0xff0 [ 27.906030] ? ioctl_preallocate+0x1a0/0x1a0 [ 27.910432] ? vfs_write+0x319/0x4d0 [ 27.914123] ? SyS_write+0x14d/0x210 [ 27.917811] ? security_file_ioctl+0x83/0xb0 [ 27.922194] SyS_ioctl+0x7f/0xb0 [ 27.925534] ? do_vfs_ioctl+0xff0/0xff0 [ 27.929485] do_syscall_64+0x1d5/0x640 [ 27.933349] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.938512] RIP: 0033:0x7fc1f83b9cd9 [ 27.942209] RSP: 002b:00007ffd15e459d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 27.949892] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc1f83b9cd9 [ 27.957138] RDX: 0000000020000140 RSI: 00000000c0481273 RDI: 0000000000000003 [ 27.964386] RBP: 00007ffd15e459e0 R08: 0000000000000002 R09: 00007fc1f8003833 [ 27.971628] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 27.978871] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.986335] Kernel Offset: disabled [ 27.989983] Rebooting in 86400 seconds..