[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.338036][ T26] audit: type=1800 audit(1567404209.695:25): pid=8418 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.376519][ T26] audit: type=1800 audit(1567404209.695:26): pid=8418 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.422773][ T26] audit: type=1800 audit(1567404209.705:27): pid=8418 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.0.130' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 96.937162][ T9805] ------------[ cut here ]------------ [ 96.942862][ T9805] WARNING: CPU: 1 PID: 9805 at kernel/time/posix-cpu-timers.c:401 posix_cpu_timer_del+0x2f0/0x3b0 [ 96.953443][ T9805] Kernel panic - not syncing: panic_on_warn set ... [ 96.960159][ T9805] CPU: 1 PID: 9805 Comm: syz-executor380 Not tainted 5.3.0-rc6-next-20190830 #75 [ 96.969336][ T9805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.979389][ T9805] Call Trace: [ 96.982678][ T9805] dump_stack+0x172/0x1f0 [ 96.987003][ T9805] ? posix_cpu_timer_del+0x2e0/0x3b0 [ 96.992277][ T9805] panic+0x2dc/0x755 [ 96.996167][ T9805] ? add_taint.cold+0x16/0x16 [ 97.000940][ T9805] ? printk+0xba/0xed [ 97.004910][ T9805] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 97.010360][ T9805] ? __warn.cold+0x14/0x3c [ 97.014750][ T9805] ? __warn+0xd9/0x1d0 [ 97.018818][ T9805] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 97.024083][ T9805] __warn.cold+0x2f/0x3c [ 97.028325][ T9805] ? report_bug.cold+0x63/0xad [ 97.033179][ T9805] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 97.038456][ T9805] report_bug+0x289/0x300 [ 97.042787][ T9805] do_error_trap+0x11b/0x200 [ 97.047372][ T9805] do_invalid_op+0x37/0x50 [ 97.051781][ T9805] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 97.057049][ T9805] invalid_op+0x23/0x30 [ 97.061292][ T9805] RIP: 0010:posix_cpu_timer_del+0x2f0/0x3b0 [ 97.067172][ T9805] Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 83 bb c8 00 00 00 00 74 16 e8 00 58 0d 00 <0f> 0b e9 87 fe ff ff e8 c4 38 48 00 e9 dd fd ff ff e8 ea 57 0d 00 [ 97.087320][ T9805] RSP: 0018:ffff88809ac87a30 EFLAGS: 00010093 [ 97.093380][ T9805] RAX: ffff888090a6e0c0 RBX: ffff88809ae762e0 RCX: 1ffff1101214dd2a [ 97.101356][ T9805] RDX: 0000000000000000 RSI: ffffffff8164fe10 RDI: ffff88809ae763a8 [ 97.109434][ T9805] RBP: ffff88809ac87ac0 R08: 0000000000000002 R09: ffff888090a6e958 [ 97.117397][ T9805] R10: fffffbfff138aef8 R11: ffffffff89c577c7 R12: ffff88809b326100 [ 97.125367][ T9805] R13: 1ffff11013590f47 R14: ffff88809ac87a98 R15: ffff88809ae76338 [ 97.133433][ T9805] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 97.138701][ T9805] ? lock_acquire+0x190/0x410 [ 97.143363][ T9805] ? thread_cpu_clock_getres+0x90/0x90 [ 97.148834][ T9805] ? thread_cpu_clock_getres+0x90/0x90 [ 97.154383][ T9805] exit_itimers+0xdb/0x2e0 [ 97.158841][ T9805] do_exit+0x1980/0x2e60 [ 97.163126][ T9805] ? get_signal+0x392/0x2500 [ 97.167711][ T9805] ? find_held_lock+0x35/0x130 [ 97.172629][ T9805] ? get_signal+0x392/0x2500 [ 97.177203][ T9805] ? mm_update_next_owner+0x640/0x640 [ 97.183001][ T9805] ? lock_downgrade+0x920/0x920 [ 97.187847][ T9805] ? _raw_spin_unlock_irq+0x28/0x90 [ 97.193021][ T9805] ? get_signal+0x392/0x2500 [ 97.197600][ T9805] ? _raw_spin_unlock_irq+0x28/0x90 [ 97.202784][ T9805] do_group_exit+0x135/0x360 [ 97.207355][ T9805] get_signal+0x47c/0x2500 [ 97.211756][ T9805] ? __x64_sys_futex+0x4c2/0x590 [ 97.216748][ T9805] ? lock_downgrade+0x920/0x920 [ 97.221592][ T9805] do_signal+0x87/0x1700 [ 97.225818][ T9805] ? trace_hardirqs_on+0x67/0x240 [ 97.230828][ T9805] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 97.236524][ T9805] ? setup_sigcontext+0x7d0/0x7d0 [ 97.241534][ T9805] ? exit_to_usermode_loop+0x43/0x380 [ 97.246971][ T9805] ? do_syscall_64+0x65f/0x760 [ 97.251742][ T9805] ? exit_to_usermode_loop+0x43/0x380 [ 97.257110][ T9805] ? lockdep_hardirqs_on+0x418/0x5d0 [ 97.262429][ T9805] ? trace_hardirqs_on+0x67/0x240 [ 97.267522][ T9805] exit_to_usermode_loop+0x286/0x380 [ 97.272805][ T9805] do_syscall_64+0x65f/0x760 [ 97.277493][ T9805] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.283371][ T9805] RIP: 0033:0x446679 [ 97.287278][ T9805] Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 97.306909][ T9805] RSP: 002b:00007ffff909e168 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 97.315336][ T9805] RAX: 0000000000000000 RBX: 0000000000017a92 RCX: 0000000000446679 [ 97.323419][ T9805] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc2c [ 97.331383][ T9805] RBP: 00000000006dbc2c R08: 000000037ffffa00 R09: 000000037ffffa00 [ 97.339623][ T9805] R10: 00007ffff909e180 R11: 0000000000000246 R12: 00000000006dbc20 [ 97.347699][ T9805] R13: 0000000000000000 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 97.357133][ T9805] Kernel Offset: disabled [ 97.361531][ T9805] Rebooting in 86400 seconds..