[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.202841][ T26] audit: type=1800 audit(1568526435.431:25): pid=8528 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.244621][ T26] audit: type=1800 audit(1568526435.441:26): pid=8528 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.265552][ T26] audit: type=1800 audit(1568526435.441:27): pid=8528 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 '10.128.1.55' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 62.372687][ T8680] kasan: CONFIG_KASAN_INLINE enabled [ 62.378287][ T8680] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 62.386411][ T8680] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 62.393337][ T8680] CPU: 0 PID: 8680 Comm: syz-executor614 Not tainted 5.3.0-rc6-next-20190830 #75 [ 62.402418][ T8680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.412486][ T8680] RIP: 0010:xsk_poll+0x95/0x540 [ 62.417425][ T8680] Code: 80 3c 02 00 0f 85 70 04 00 00 4c 8b a3 88 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 96 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 bf 03 00 00 [ 62.438528][ T8680] RSP: 0018:ffff8880a05cf690 EFLAGS: 00010207 [ 62.446167][ T8680] RAX: dffffc0000000000 RBX: ffff8880a0126000 RCX: ffffffff859b666a [ 62.454291][ T8680] RDX: 0000000000000012 RSI: ffffffff859b6684 RDI: 0000000000000096 [ 62.462696][ T8680] RBP: ffff8880a05cf6c0 R08: ffff888098456000 R09: ffffed1014024c49 [ 62.470672][ T8680] R10: ffffed1014024c48 R11: ffff8880a0126247 R12: 0000000000000000 [ 62.478629][ T8680] R13: 0000000000000304 R14: ffff88809525d000 R15: ffff8880939f8a60 [ 62.486667][ T8680] FS: 00005555562d4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 62.495597][ T8680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.502158][ T8680] CR2: 0000000000000000 CR3: 0000000096708000 CR4: 00000000001406f0 [ 62.510106][ T8680] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.518054][ T8680] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.526107][ T8680] Call Trace: [ 62.529376][ T8680] ? datagram_poll+0x314/0x510 [ 62.534115][ T8680] ? xsk_setsockopt+0x680/0x680 [ 62.538987][ T8680] sock_poll+0x15e/0x480 [ 62.543220][ T8680] ? __sock_recv_wifi_status+0x1d0/0x1d0 [ 62.549189][ T8680] do_select+0x927/0x16f0 [ 62.553502][ T8680] ? select_estimate_accuracy+0x330/0x330 [ 62.559296][ T8680] ? bsearch+0xa1/0xc0 [ 62.563342][ T8680] ? cmp_ex_sort+0xd0/0xd0 [ 62.567733][ T8680] ? poll_initwait+0x180/0x180 [ 62.572558][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.577656][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.582596][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.587526][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.592529][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.597722][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.602638][ T8680] ? set_fd_set.part.0+0x70/0x70 [ 62.607552][ T8680] ? core_sys_select+0x212/0x890 [ 62.612468][ T8680] ? lock_downgrade+0x920/0x920 [ 62.617312][ T8680] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 62.623540][ T8680] core_sys_select+0x564/0x890 [ 62.628299][ T8680] ? core_sys_select+0x564/0x890 [ 62.633218][ T8680] ? do_compat_pselect+0x230/0x230 [ 62.638323][ T8680] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 62.644555][ T8680] ? xsk_setsockopt+0x13b/0x680 [ 62.649500][ T8680] ? xsk_init_queue+0xf0/0xf0 [ 62.654192][ T8680] ? aa_sock_opt_perm.isra.0+0xa1/0x130 [ 62.659908][ T8680] ? apparmor_socket_setsockopt+0x22/0x30 [ 62.665623][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.671884][ T8680] ? security_socket_setsockopt+0x8d/0xc0 [ 62.677585][ T8680] ? set_user_sigmask+0x166/0x1e0 [ 62.682587][ T8680] ? sigprocmask+0x2b0/0x2b0 [ 62.687364][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.693591][ T8680] ? __sys_setsockopt+0x303/0x4c0 [ 62.698605][ T8680] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 62.704839][ T8680] __x64_sys_pselect6+0x3df/0x490 [ 62.709871][ T8680] ? __ia32_sys_select+0x150/0x150 [ 62.714961][ T8680] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 62.720393][ T8680] ? do_syscall_64+0x26/0x760 [ 62.725141][ T8680] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.731186][ T8680] ? do_syscall_64+0x26/0x760 [ 62.735963][ T8680] ? lockdep_hardirqs_on+0x418/0x5d0 [ 62.741419][ T8680] ? trace_hardirqs_on+0x67/0x240 [ 62.746432][ T8680] do_syscall_64+0xfa/0x760 [ 62.750915][ T8680] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.756782][ T8680] RIP: 0033:0x4402c9 [ 62.760667][ T8680] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.780364][ T8680] RSP: 002b:00007ffcaa491348 EFLAGS: 00000246 ORIG_RAX: 000000000000010e [ 62.788750][ T8680] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402c9 [ 62.796723][ T8680] RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000040 [ 62.804790][ T8680] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 62.812745][ T8680] R10: 0000000020000140 R11: 0000000000000246 R12: 0000000000401b50 [ 62.820702][ T8680] R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 [ 62.828668][ T8680] Modules linked in: [ 62.832715][ T8680] ---[ end trace f6632f03d3406035 ]--- [ 62.839191][ T8680] RIP: 0010:xsk_poll+0x95/0x540 [ 62.844027][ T8680] Code: 80 3c 02 00 0f 85 70 04 00 00 4c 8b a3 88 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d bc 24 96 00 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 bf 03 00 00 [ 62.864138][ T8680] RSP: 0018:ffff8880a05cf690 EFLAGS: 00010207 [ 62.870408][ T8680] RAX: dffffc0000000000 RBX: ffff8880a0126000 RCX: ffffffff859b666a [ 62.878386][ T8680] RDX: 0000000000000012 RSI: ffffffff859b6684 RDI: 0000000000000096 [ 62.886397][ T8680] RBP: ffff8880a05cf6c0 R08: ffff888098456000 R09: ffffed1014024c49 [ 62.894364][ T8680] R10: ffffed1014024c48 R11: ffff8880a0126247 R12: 0000000000000000 [ 62.902374][ T8680] R13: 0000000000000304 R14: ffff88809525d000 R15: ffff8880939f8a60 [ 62.910726][ T8680] FS: 00005555562d4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 62.919862][ T8680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.926454][ T8680] CR2: 0000000000000000 CR3: 0000000096708000 CR4: 00000000001406f0 [ 62.934408][ T8680] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.942390][ T8680] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.950378][ T8680] Kernel panic - not syncing: Fatal exception [ 62.957190][ T8680] Kernel Offset: disabled [ 62.961512][ T8680] Rebooting in 86400 seconds..