[ 43.945823] audit: type=1800 audit(1580338881.557:30): pid=8010 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 48.603249] kauditd_printk_skb: 4 callbacks suppressed [ 48.603264] audit: type=1400 audit(1580338886.237:35): avc: denied { map } for pid=8184 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 '10.128.1.22' (ECDSA) to the list of known hosts. executing program [ 55.431520] audit: type=1400 audit(1580338893.067:36): avc: denied { map } for pid=8196 comm="syz-executor005" path="/root/syz-executor005513578" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 55.435857] kasan: CONFIG_KASAN_INLINE enabled [ 55.458604] audit: type=1400 audit(1580338893.067:37): avc: denied { create } for pid=8196 comm="syz-executor005" 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 [ 55.462674] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 55.490553] audit: type=1400 audit(1580338893.067:38): avc: denied { write } for pid=8196 comm="syz-executor005" 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 [ 55.494570] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.524783] CPU: 1 PID: 8196 Comm: syz-executor005 Not tainted 4.19.100-syzkaller #0 [ 55.532767] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.542204] RIP: 0010:nfnetlink_parse_nat_setup+0x252/0x450 [ 55.547906] Code: 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 ff ff <41> ff 57 38 31 ff 89 c3 89 c6 e8 bf a7 6e fb 85 db 0f 88 44 01 00 [ 55.566828] RSP: 0018:ffff8880a8857148 EFLAGS: 00010246 [ 55.572223] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fc5e08 [ 55.579553] RDX: 1ffffffff0c04829 RSI: ffff8880a8857180 RDI: ffff8880a88571d0 [ 55.586919] RBP: ffff8880a8857268 R08: ffff88809b80e480 R09: ffff8880a88571d0 [ 55.594185] R10: ffffed101510ae3f R11: ffff8880a88571ff R12: ffff88808f06b1c0 [ 55.601453] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86024110 [ 55.608827] FS: 00000000026bc880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 55.617098] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.622985] CR2: 0000562ada5f71b0 CR3: 000000008a41b000 CR4: 00000000001406e0 [ 55.630256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.638133] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.645449] Call Trace: [ 55.648111] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 55.652321] ctnetlink_parse_nat_setup+0xc5/0x660 [ 55.657168] ctnetlink_create_conntrack+0x4ea/0x1300 [ 55.662448] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 55.667345] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 55.672371] ctnetlink_new_conntrack+0x527/0xe50 [ 55.677132] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 55.682497] ? find_held_lock+0x35/0x130 [ 55.686565] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 55.691760] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 55.697131] nfnetlink_rcv_msg+0xd0d/0xfcf [ 55.701374] ? nfnetlink_bind+0x2c0/0x2c0 [ 55.705533] ? avc_has_extended_perms+0x10f0/0x10f0 [ 55.710656] ? __save_stack_trace+0x99/0x100 [ 55.715494] ? selinux_ipv4_output+0x50/0x50 [ 55.719908] ? netlink_sendmsg+0x97b/0xd70 [ 55.724145] ? mark_held_locks+0x100/0x100 [ 55.728474] netlink_rcv_skb+0x17d/0x460 [ 55.732553] ? nfnetlink_bind+0x2c0/0x2c0 [ 55.736700] ? netlink_ack+0xb30/0xb30 [ 55.740584] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.746111] ? ns_capable_common+0x93/0x100 [ 55.750423] ? ns_capable+0x20/0x30 [ 55.754059] ? __netlink_ns_capable+0x104/0x140 [ 55.758819] nfnetlink_rcv+0x1c0/0x460 [ 55.762823] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 55.767653] ? netlink_deliver_tap+0x254/0xc20 [ 55.772292] ? kasan_check_write+0x14/0x20 [ 55.776544] netlink_unicast+0x53a/0x730 [ 55.780723] ? netlink_attachskb+0x770/0x770 [ 55.785128] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.790677] netlink_sendmsg+0x8ae/0xd70 [ 55.794749] ? netlink_unicast+0x730/0x730 [ 55.798992] ? selinux_socket_sendmsg+0x36/0x40 [ 55.803657] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.809224] ? security_socket_sendmsg+0x8d/0xc0 [ 55.813984] ? netlink_unicast+0x730/0x730 [ 55.818217] sock_sendmsg+0xd7/0x130 [ 55.822123] ___sys_sendmsg+0x803/0x920 [ 55.826155] ? copy_msghdr_from_user+0x430/0x430 [ 55.830920] ? __handle_mm_fault+0x7d1/0x3f80 [ 55.835406] ? copy_page_range+0x2030/0x2030 [ 55.839959] ? __do_page_fault+0x676/0xe90 [ 55.844247] ? find_held_lock+0x35/0x130 [ 55.848310] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.853897] ? __fget_light+0x1a9/0x230 [ 55.857868] ? __fdget+0x1b/0x20 [ 55.861222] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.866775] __sys_sendmsg+0x105/0x1d0 [ 55.870674] ? __ia32_sys_shutdown+0x80/0x80 [ 55.875209] ? up_read+0x1a/0x110 [ 55.878764] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.883522] ? do_syscall_64+0x26/0x620 [ 55.887489] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.892856] ? do_syscall_64+0x26/0x620 [ 55.896868] __x64_sys_sendmsg+0x78/0xb0 [ 55.900939] do_syscall_64+0xfd/0x620 [ 55.904744] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.909932] RIP: 0033:0x440239 [ 55.913115] 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 [ 55.932121] RSP: 002b:00007ffca262fac8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.940079] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 55.947354] RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003 [ 55.954732] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 55.962019] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ac0 [ 55.969287] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 55.976552] Modules linked in: [ 55.980000] ---[ end trace d03de0598525cb45 ]--- [ 55.984919] RIP: 0010:nfnetlink_parse_nat_setup+0x252/0x450 [ 55.990908] Code: 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 ff ff <41> ff 57 38 31 ff 89 c3 89 c6 e8 bf a7 6e fb 85 db 0f 88 44 01 00 [ 56.010309] RSP: 0018:ffff8880a8857148 EFLAGS: 00010246 [ 56.015727] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fc5e08 [ 56.023239] RDX: 1ffffffff0c04829 RSI: ffff8880a8857180 RDI: ffff8880a88571d0 [ 56.030578] RBP: ffff8880a8857268 R08: ffff88809b80e480 R09: ffff8880a88571d0 [ 56.037944] R10: ffffed101510ae3f R11: ffff8880a88571ff R12: ffff88808f06b1c0 [ 56.045223] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff86024110 [ 56.052549] FS: 00000000026bc880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 56.060852] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 56.066964] CR2: 0000562ada5f71b0 CR3: 000000008a41b000 CR4: 00000000001406e0 [ 56.074253] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 56.081641] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 56.089062] Kernel panic - not syncing: Fatal exception [ 56.096088] Kernel Offset: disabled [ 56.099722] Rebooting in 86400 seconds..