[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 48.977199][ T26] audit: type=1800 audit(1563572219.876:25): pid=8391 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 49.019256][ T26] audit: type=1800 audit(1563572219.886:26): pid=8391 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 49.054249][ T26] audit: type=1800 audit(1563572219.886:27): pid=8391 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.197' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 59.097459][ T8544] netlink: 4 bytes leftover after parsing attributes in process `syz-executor929'. [ 59.106941][ T8544] kasan: CONFIG_KASAN_INLINE enabled [ 59.115942][ T8544] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 59.124155][ T8544] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 59.131077][ T8544] CPU: 0 PID: 8544 Comm: syz-executor929 Not tainted 5.2.0+ #35 [ 59.138678][ T8544] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.148823][ T8544] RIP: 0010:tcf_ife_init+0xff/0x1630 [ 59.154113][ T8544] Code: 00 74 08 4c 89 ef e8 d0 17 8e fb 48 8d 9c 24 a0 00 00 00 48 c7 84 24 50 01 00 00 00 00 00 00 4d 8d 6e 04 4c 89 f0 48 c1 e8 03 <42> 8a 04 38 84 c0 0f 85 ca 12 00 00 41 0f b7 0e 83 c1 fc 48 89 df [ 59.173904][ T8544] RSP: 0018:ffff888088166c00 EFLAGS: 00010246 [ 59.180066][ T8544] RAX: 0000000000000000 RBX: ffff888088166ca0 RCX: 0000000088166b03 [ 59.188029][ T8544] RDX: ffff888092d0ced8 RSI: ffffffff88cd6340 RDI: 0000000000000282 [ 59.195983][ T8544] RBP: ffff888088166dd8 R08: dffffc0000000000 R09: fffffbfff11fba3d [ 59.203932][ T8544] R10: fffffbfff11fba3d R11: 0000000000000000 R12: 1ffff1101102cdaa [ 59.211898][ T8544] R13: 0000000000000004 R14: 0000000000000000 R15: dffffc0000000000 [ 59.219848][ T8544] FS: 0000555556a58880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 59.228749][ T8544] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.235339][ T8544] CR2: 0000000020000180 CR3: 0000000090682000 CR4: 00000000001406f0 [ 59.243300][ T8544] Call Trace: [ 59.246619][ T8544] ? unwind_get_return_address_ptr+0xa0/0xa0 [ 59.252665][ T8544] ? tcf_ife_search+0x40/0x40 [ 59.257350][ T8544] ? tcf_action_init_1+0x2e4/0xd40 [ 59.262451][ T8544] ? __kasan_check_write+0x14/0x20 [ 59.267559][ T8544] ? do_raw_read_unlock+0x42/0xf0 [ 59.272568][ T8544] ? tcf_ife_search+0x40/0x40 [ 59.277225][ T8544] tcf_action_init_1+0x786/0xd40 [ 59.282141][ T8544] ? tcf_action_dump+0x290/0x290 [ 59.287074][ T8544] ? __nla_validate+0x50/0x50 [ 59.291903][ T8544] ? mark_lock+0x152/0x1850 [ 59.296395][ T8544] ? __nla_parse+0x41/0x50 [ 59.300804][ T8544] tcf_action_init+0x183/0x490 [ 59.305774][ T8544] ? tcf_action_init_1+0xd40/0xd40 [ 59.310958][ T8544] ? __nla_validate_parse+0x18f4/0x2010 [ 59.316486][ T8544] ? security_capable+0xa2/0xd0 [ 59.321350][ T8544] tc_ctl_action+0x3ad/0x920 [ 59.326125][ T8544] ? rtnetlink_rcv_msg+0xad2/0xe50 [ 59.331215][ T8544] ? tcf_free_cookie_rcu+0x50/0x50 [ 59.336305][ T8544] ? __mutex_lock_common+0x56e/0x2850 [ 59.341686][ T8544] ? rcu_lock_release+0x9/0x30 [ 59.346592][ T8544] ? tcf_free_cookie_rcu+0x50/0x50 [ 59.351715][ T8544] rtnetlink_rcv_msg+0xb19/0xe50 [ 59.356655][ T8544] ? rtnetlink_bind+0x80/0x80 [ 59.361319][ T8544] ? trace_lock_acquire+0x1d0/0x1d0 [ 59.366515][ T8544] netlink_rcv_skb+0x1f0/0x460 [ 59.371271][ T8544] ? rtnetlink_bind+0x80/0x80 [ 59.375930][ T8544] ? netlink_ack+0xae0/0xae0 [ 59.380670][ T8544] ? check_preemption_disabled+0x47/0x2a0 [ 59.386367][ T8544] rtnetlink_rcv+0x1c/0x20 [ 59.390761][ T8544] netlink_unicast+0x809/0x9a0 [ 59.395660][ T8544] ? netlink_detachskb+0x50/0x50 [ 59.400576][ T8544] ? __check_object_size+0x313/0x400 [ 59.406024][ T8544] ? security_netlink_send+0x94/0xb0 [ 59.412603][ T8544] netlink_sendmsg+0xa70/0xd30 [ 59.417373][ T8544] ? netlink_getsockopt+0x9f0/0x9f0 [ 59.422578][ T8544] ? tomoyo_socket_sendmsg+0x25/0x30 [ 59.428054][ T8544] ? security_socket_sendmsg+0xa0/0xd0 [ 59.433576][ T8544] ? netlink_getsockopt+0x9f0/0x9f0 [ 59.438857][ T8544] ___sys_sendmsg+0x66b/0x9a0 [ 59.443686][ T8544] ? __sys_sendmsg_sock+0x100/0x100 [ 59.448863][ T8544] ? handle_mm_fault+0x10d0/0x6070 [ 59.454132][ T8544] ? __kasan_check_write+0x14/0x20 [ 59.459404][ T8544] ? __up_read+0x225/0x5b0 [ 59.463804][ T8544] ? __down_read+0x3d0/0x3d0 [ 59.468545][ T8544] ? __kasan_check_read+0x11/0x20 [ 59.473824][ T8544] ? __fdget+0x156/0x200 [ 59.478062][ T8544] __x64_sys_sendmsg+0x1cf/0x290 [ 59.483000][ T8544] ? __sys_sendmsg+0x250/0x250 [ 59.487762][ T8544] ? do_user_addr_fault+0x655/0xaf0 [ 59.492946][ T8544] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 59.498751][ T8544] ? do_syscall_64+0x1d/0x140 [ 59.503508][ T8544] do_syscall_64+0xfe/0x140 [ 59.508108][ T8544] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 59.513984][ T8544] RIP: 0033:0x4401d9 [ 59.518115][ T8544] 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 [ 59.537890][ T8544] RSP: 002b:00007ffc921a6e78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 59.546284][ T8544] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401d9 [ 59.554248][ T8544] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 59.562382][ T8544] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 59.570335][ T8544] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a60 [ 59.578290][ T8544] R13: 0000000000401af0 R14: 0000000000000000 R15: 0000000000000000 [ 59.586347][ T8544] Modules linked in: [ 59.591111][ T8544] ---[ end trace 48e79de6c508ddb2 ]--- [ 59.597214][ T8544] RIP: 0010:tcf_ife_init+0xff/0x1630 [ 59.602849][ T8544] Code: 00 74 08 4c 89 ef e8 d0 17 8e fb 48 8d 9c 24 a0 00 00 00 48 c7 84 24 50 01 00 00 00 00 00 00 4d 8d 6e 04 4c 89 f0 48 c1 e8 03 <42> 8a 04 38 84 c0 0f 85 ca 12 00 00 41 0f b7 0e 83 c1 fc 48 89 df [ 59.622598][ T8544] RSP: 0018:ffff888088166c00 EFLAGS: 00010246 [ 59.633426][ T8544] RAX: 0000000000000000 RBX: ffff888088166ca0 RCX: 0000000088166b03 [ 59.641524][ T8544] RDX: ffff888092d0ced8 RSI: ffffffff88cd6340 RDI: 0000000000000282 [ 59.649529][ T8544] RBP: ffff888088166dd8 R08: dffffc0000000000 R09: fffffbfff11fba3d [ 59.657567][ T8544] R10: fffffbfff11fba3d R11: 0000000000000000 R12: 1ffff1101102cdaa [ 59.665574][ T8544] R13: 0000000000000004 R14: 0000000000000000 R15: dffffc0000000000 [ 59.673661][ T8544] FS: 0000555556a58880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 59.683782][ T8544] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.690389][ T8544] CR2: 0000000020000180 CR3: 0000000090682000 CR4: 00000000001406f0 [ 59.698524][ T8544] Kernel panic - not syncing: Fatal exception [ 59.705878][ T8544] Kernel Offset: disabled [ 59.710283][ T8544] Rebooting in 86400 seconds..