[ 41.808799] audit: type=1800 audit(1579350057.861:30): pid=7825 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 46.813555] kauditd_printk_skb: 4 callbacks suppressed [ 46.813571] audit: type=1400 audit(1579350062.901:35): avc: denied { map } for pid=8000 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.15.194' (ECDSA) to the list of known hosts. executing program [ 53.737981] audit: type=1400 audit(1579350069.831:36): avc: denied { map } for pid=8012 comm="syz-executor856" path="/root/syz-executor856115642" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 53.741663] kasan: CONFIG_KASAN_INLINE enabled [ 53.764882] audit: type=1400 audit(1579350069.831:37): avc: denied { create } for pid=8012 comm="syz-executor856" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 53.769516] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 53.797634] audit: type=1400 audit(1579350069.831:38): avc: denied { write } for pid=8012 comm="syz-executor856" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 53.800676] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 53.831055] CPU: 0 PID: 8012 Comm: syz-executor856 Not tainted 4.19.97-syzkaller #0 [ 53.838837] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.848180] RIP: 0010:nfnetlink_parse_nat_setup+0x23a/0x450 [ 53.853941] Code: c3 89 c6 e8 48 4d 6d fb 85 db 0f 88 8d 01 00 00 e8 bb 4b 6d fb 49 8d 7f 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 01 00 00 48 8b b5 e8 fe ff ff 48 8b bd e0 fe [ 53.872870] RSP: 0018:ffff888093ddf148 EFLAGS: 00010202 [ 53.878224] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 53.885478] RDX: 0000000000000008 RSI: ffffffff85fdca05 RDI: 0000000000000041 [ 53.892772] RBP: ffff888093ddf268 R08: ffff8880952e22c0 R09: ffff888093ddf1d0 [ 53.900024] R10: ffffed10127bbe3f R11: ffff888093ddf1ff R12: ffff88809ed39ac0 [ 53.907276] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000009 [ 53.914529] FS: 0000000002515880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 53.922761] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.928636] CR2: 000055e574d56190 CR3: 0000000094a13000 CR4: 00000000001406f0 [ 53.935905] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.943163] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.950434] Call Trace: [ 53.953016] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 53.957199] ctnetlink_parse_nat_setup+0xc5/0x660 [ 53.962027] ctnetlink_create_conntrack+0x4ea/0x1300 [ 53.967116] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 53.971943] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 53.976945] ctnetlink_new_conntrack+0x527/0xe50 [ 53.981685] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 53.987035] ? find_held_lock+0x35/0x130 [ 53.991078] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 53.996251] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 54.001599] nfnetlink_rcv_msg+0xd0d/0xfcf [ 54.005820] ? nfnetlink_bind+0x2c0/0x2c0 [ 54.010010] ? avc_has_extended_perms+0x10f0/0x10f0 [ 54.015036] ? selinux_ipv4_output+0x50/0x50 [ 54.019431] ? mark_held_locks+0x100/0x100 [ 54.023651] netlink_rcv_skb+0x17d/0x460 [ 54.027696] ? nfnetlink_bind+0x2c0/0x2c0 [ 54.031829] ? netlink_ack+0xb30/0xb30 [ 54.035701] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.041276] ? ns_capable+0x23/0x30 [ 54.044890] ? __netlink_ns_capable+0x104/0x140 [ 54.049543] nfnetlink_rcv+0x1c0/0x460 [ 54.053455] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 54.058194] ? netlink_deliver_tap+0x254/0xc20 [ 54.062768] ? kasan_check_write+0x14/0x20 [ 54.067051] netlink_unicast+0x53a/0x730 [ 54.071171] ? netlink_attachskb+0x770/0x770 [ 54.075598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.081243] netlink_sendmsg+0x8ae/0xd70 [ 54.086172] ? netlink_unicast+0x730/0x730 [ 54.090442] ? selinux_socket_sendmsg+0x36/0x40 [ 54.095102] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.100671] ? security_socket_sendmsg+0x8d/0xc0 [ 54.105414] ? netlink_unicast+0x730/0x730 [ 54.109638] sock_sendmsg+0xd7/0x130 [ 54.113350] ___sys_sendmsg+0x803/0x920 [ 54.117311] ? copy_msghdr_from_user+0x430/0x430 [ 54.122053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.127587] ? __handle_mm_fault+0x7d1/0x3f80 [ 54.132066] ? copy_page_range+0x2030/0x2030 [ 54.136475] ? __do_page_fault+0x676/0xe90 [ 54.140701] ? find_held_lock+0x35/0x130 [ 54.144761] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.150293] ? __fget_light+0x1a9/0x230 [ 54.154252] ? __fdget+0x1b/0x20 [ 54.157614] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 54.163136] __sys_sendmsg+0x105/0x1d0 [ 54.167009] ? __ia32_sys_shutdown+0x80/0x80 [ 54.171414] ? up_read+0x1a/0x110 [ 54.174875] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 54.179625] ? do_syscall_64+0x26/0x620 [ 54.183629] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.188981] ? do_syscall_64+0x26/0x620 [ 54.192950] __x64_sys_sendmsg+0x78/0xb0 [ 54.197002] do_syscall_64+0xfd/0x620 [ 54.200792] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.205964] RIP: 0033:0x440479 [ 54.209143] 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 [ 54.228083] RSP: 002b:00007fffceb5f9c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 54.235778] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440479 [ 54.243030] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 54.250291] RBP: 00000000006ca018 R08: 0000000000000014 R09: 00000000004002c8 [ 54.257552] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000401d00 [ 54.264861] R13: 0000000000401d90 R14: 0000000000000000 R15: 0000000000000000 [ 54.272122] Modules linked in: [ 54.275715] ---[ end trace 87dc14b51052f72a ]--- [ 54.280503] RIP: 0010:nfnetlink_parse_nat_setup+0x23a/0x450 [ 54.286245] Code: c3 89 c6 e8 48 4d 6d fb 85 db 0f 88 8d 01 00 00 e8 bb 4b 6d fb 49 8d 7f 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ed 01 00 00 48 8b b5 e8 fe ff ff 48 8b bd e0 fe [ 54.305171] RSP: 0018:ffff888093ddf148 EFLAGS: 00010202 [ 54.310545] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 54.317935] RDX: 0000000000000008 RSI: ffffffff85fdca05 RDI: 0000000000000041 [ 54.325385] RBP: ffff888093ddf268 R08: ffff8880952e22c0 R09: ffff888093ddf1d0 [ 54.332668] R10: ffffed10127bbe3f R11: ffff888093ddf1ff R12: ffff88809ed39ac0 [ 54.339954] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000009 [ 54.347233] FS: 0000000002515880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 54.355465] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.361359] CR2: 000055e574d56190 CR3: 0000000094a13000 CR4: 00000000001406f0 [ 54.368641] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.375893] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.383174] Kernel panic - not syncing: Fatal exception [ 54.390218] Kernel Offset: disabled [ 54.393853] Rebooting in 86400 seconds..