[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.750789][ T26] audit: type=1800 audit(1567462058.666:25): pid=8456 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.789459][ T26] audit: type=1800 audit(1567462058.666:26): pid=8456 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.822489][ T26] audit: type=1800 audit(1567462058.676:27): pid=8456 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 '10.128.15.192' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 77.369787][ T9863] ------------[ cut here ]------------ [ 77.375475][ T9863] WARNING: CPU: 1 PID: 9863 at kernel/time/posix-cpu-timers.c:401 posix_cpu_timer_del+0x2f0/0x3b0 [ 77.386043][ T9863] Kernel panic - not syncing: panic_on_warn set ... [ 77.392629][ T9863] CPU: 1 PID: 9863 Comm: syz-executor971 Not tainted 5.3.0-rc6-next-20190830 #75 [ 77.401711][ T9863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.411746][ T9863] Call Trace: [ 77.415107][ T9863] dump_stack+0x172/0x1f0 [ 77.419420][ T9863] ? posix_cpu_timer_del+0x2e0/0x3b0 [ 77.424682][ T9863] panic+0x2dc/0x755 [ 77.428565][ T9863] ? add_taint.cold+0x16/0x16 [ 77.433235][ T9863] ? printk+0xba/0xed [ 77.437195][ T9863] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 77.442632][ T9863] ? __warn.cold+0x14/0x3c [ 77.447025][ T9863] ? __warn+0xd9/0x1d0 [ 77.451082][ T9863] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 77.456342][ T9863] __warn.cold+0x2f/0x3c [ 77.460650][ T9863] ? report_bug.cold+0x63/0xad [ 77.465409][ T9863] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 77.470668][ T9863] report_bug+0x289/0x300 [ 77.474991][ T9863] do_error_trap+0x11b/0x200 [ 77.479563][ T9863] do_invalid_op+0x37/0x50 [ 77.483973][ T9863] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 77.489261][ T9863] invalid_op+0x23/0x30 [ 77.493422][ T9863] RIP: 0010:posix_cpu_timer_del+0x2f0/0x3b0 [ 77.499303][ T9863] 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 [ 77.521371][ T9863] RSP: 0018:ffff88808771fa30 EFLAGS: 00010093 [ 77.527419][ T9863] RAX: ffff888095cec480 RBX: ffff8880a11b0a10 RCX: 1ffff11012b9d9a2 [ 77.535370][ T9863] RDX: 0000000000000000 RSI: ffffffff8164fe10 RDI: ffff8880a11b0ad8 [ 77.543330][ T9863] RBP: ffff88808771fac0 R08: 0000000000000002 R09: ffff888095cecd18 [ 77.551290][ T9863] R10: fffffbfff138aef8 R11: ffffffff89c577c7 R12: ffff88809abec4c0 [ 77.559275][ T9863] R13: 1ffff11010ee3f47 R14: ffff88808771fa98 R15: ffff8880a11b0a68 [ 77.567269][ T9863] ? posix_cpu_timer_del+0x2f0/0x3b0 [ 77.572623][ T9863] ? lock_acquire+0x190/0x410 [ 77.577454][ T9863] ? thread_cpu_clock_getres+0x90/0x90 [ 77.582932][ T9863] ? thread_cpu_clock_getres+0x90/0x90 [ 77.588474][ T9863] exit_itimers+0xdb/0x2e0 [ 77.592890][ T9863] do_exit+0x1980/0x2e60 [ 77.597114][ T9863] ? get_signal+0x392/0x2500 [ 77.601709][ T9863] ? find_held_lock+0x35/0x130 [ 77.606453][ T9863] ? get_signal+0x392/0x2500 [ 77.611024][ T9863] ? mm_update_next_owner+0x640/0x640 [ 77.616394][ T9863] ? lock_downgrade+0x920/0x920 [ 77.621238][ T9863] ? _raw_spin_unlock_irq+0x28/0x90 [ 77.626423][ T9863] ? get_signal+0x392/0x2500 [ 77.630989][ T9863] ? _raw_spin_unlock_irq+0x28/0x90 [ 77.636171][ T9863] do_group_exit+0x135/0x360 [ 77.640739][ T9863] get_signal+0x47c/0x2500 [ 77.645135][ T9863] ? __x64_sys_futex+0x4c2/0x590 [ 77.650054][ T9863] ? lock_downgrade+0x920/0x920 [ 77.654888][ T9863] do_signal+0x87/0x1700 [ 77.659110][ T9863] ? trace_hardirqs_on+0x67/0x240 [ 77.664130][ T9863] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 77.669837][ T9863] ? setup_sigcontext+0x7d0/0x7d0 [ 77.674843][ T9863] ? exit_to_usermode_loop+0x43/0x380 [ 77.680189][ T9863] ? do_syscall_64+0x65f/0x760 [ 77.684930][ T9863] ? exit_to_usermode_loop+0x43/0x380 [ 77.690281][ T9863] ? lockdep_hardirqs_on+0x418/0x5d0 [ 77.695549][ T9863] ? trace_hardirqs_on+0x67/0x240 [ 77.700553][ T9863] exit_to_usermode_loop+0x286/0x380 [ 77.705817][ T9863] do_syscall_64+0x65f/0x760 [ 77.710391][ T9863] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.716259][ T9863] RIP: 0033:0x446679 [ 77.720149][ T9863] 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 [ 77.739737][ T9863] RSP: 002b:00007ffff1ee67e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 77.748145][ T9863] RAX: fffffffffffffdfc RBX: 0000000000012e22 RCX: 0000000000446679 [ 77.756097][ T9863] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc2c [ 77.764048][ T9863] RBP: 00000000006dbc2c R08: 000000037ffffa00 R09: 000000037ffffa00 [ 77.771997][ T9863] R10: 00007ffff1ee6800 R11: 0000000000000246 R12: 00000000006dbc20 [ 77.779952][ T9863] R13: 0000000000000000 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 77.789452][ T9863] Kernel Offset: disabled [ 77.794010][ T9863] Rebooting in 86400 seconds..