[ 42.219811] audit: type=1800 audit(1579944469.687:30): pid=7914 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: [ 47.602294] kauditd_printk_skb: 4 callbacks suppressed [ 47.602310] audit: type=1400 audit(1579944475.107:35): avc: denied { map } for pid=8089 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 '10.128.0.177' (ECDSA) to the list of known hosts. executing program [ 54.642598] audit: type=1400 audit(1579944482.147:36): avc: denied { map } for pid=8101 comm="syz-executor232" path="/root/syz-executor232276133" 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 [ 54.646482] kasan: CONFIG_KASAN_INLINE enabled [ 54.669215] audit: type=1400 audit(1579944482.147:37): avc: denied { create } for pid=8101 comm="syz-executor232" 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 [ 54.674047] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 54.701551] audit: type=1400 audit(1579944482.147:38): avc: denied { write } for pid=8101 comm="syz-executor232" 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 [ 54.705265] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 54.735519] CPU: 1 PID: 8101 Comm: syz-executor232 Not tainted 4.19.98-syzkaller #0 [ 54.743293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.752640] RIP: 0010:nfnetlink_parse_nat_setup+0x23a/0x450 [ 54.758331] Code: c3 89 c6 e8 f8 5c 6d fb 85 db 0f 88 8d 01 00 00 e8 6b 5b 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 [ 54.777214] RSP: 0018:ffff8880855bf148 EFLAGS: 00010203 [ 54.782564] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdb9f8 [ 54.789871] RDX: 0000000000000007 RSI: ffffffff85fdba05 RDI: 000000000000003d [ 54.797126] RBP: ffff8880855bf268 R08: ffff88808d2241c0 R09: ffff8880855bf1d0 [ 54.804377] R10: ffffed1010ab7e3f R11: ffff8880855bf1ff R12: ffff8880a7269800 [ 54.811626] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 54.819021] FS: 00000000011ae880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 54.827243] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 54.833105] CR2: 000055b1a9fc9190 CR3: 0000000098a48000 CR4: 00000000001406e0 [ 54.840357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 54.847610] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 54.854858] Call Trace: [ 54.857431] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 54.861571] ctnetlink_parse_nat_setup+0xc5/0x660 [ 54.866443] ctnetlink_create_conntrack+0x532/0x1300 [ 54.871527] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 54.876365] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 54.881368] ctnetlink_new_conntrack+0x527/0xe50 [ 54.886105] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 54.891452] ? find_held_lock+0x35/0x130 [ 54.895496] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 54.900669] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 54.906026] nfnetlink_rcv_msg+0xd0d/0xfcf [ 54.910263] ? nfnetlink_bind+0x2c0/0x2c0 [ 54.914544] ? avc_has_extended_perms+0x10f0/0x10f0 [ 54.919554] ? __save_stack_trace+0x99/0x100 [ 54.923955] ? selinux_ipv4_output+0x50/0x50 [ 54.928345] ? netlink_sendmsg+0x97b/0xd70 [ 54.932568] ? mark_held_locks+0x100/0x100 [ 54.936786] netlink_rcv_skb+0x17d/0x460 [ 54.940840] ? nfnetlink_bind+0x2c0/0x2c0 [ 54.945030] ? netlink_ack+0xb30/0xb30 [ 54.948904] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.954497] ? ns_capable_common+0x93/0x100 [ 54.958853] ? ns_capable+0x20/0x30 [ 54.962504] ? __netlink_ns_capable+0x104/0x140 [ 54.967166] nfnetlink_rcv+0x1c0/0x460 [ 54.971039] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 54.975776] ? netlink_deliver_tap+0x254/0xc20 [ 54.980359] ? kasan_check_write+0x14/0x20 [ 54.984586] netlink_unicast+0x53a/0x730 [ 54.988634] ? netlink_attachskb+0x770/0x770 [ 54.993027] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.998547] netlink_sendmsg+0x8ae/0xd70 [ 55.002593] ? netlink_unicast+0x730/0x730 [ 55.006814] ? selinux_socket_sendmsg+0x36/0x40 [ 55.011465] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.017002] ? security_socket_sendmsg+0x8d/0xc0 [ 55.021759] ? netlink_unicast+0x730/0x730 [ 55.025985] sock_sendmsg+0xd7/0x130 [ 55.029681] ___sys_sendmsg+0x803/0x920 [ 55.033678] ? copy_msghdr_from_user+0x430/0x430 [ 55.038423] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.043955] ? __handle_mm_fault+0x7d1/0x3f80 [ 55.048436] ? copy_page_range+0x2030/0x2030 [ 55.052831] ? __do_page_fault+0x676/0xe90 [ 55.057049] ? find_held_lock+0x35/0x130 [ 55.061099] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.066618] ? __fget_light+0x1a9/0x230 [ 55.070574] ? __fdget+0x1b/0x20 [ 55.073923] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.079478] __sys_sendmsg+0x105/0x1d0 [ 55.083350] ? __ia32_sys_shutdown+0x80/0x80 [ 55.087738] ? up_read+0x1a/0x110 [ 55.091180] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.095917] ? do_syscall_64+0x26/0x620 [ 55.099871] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.105217] ? do_syscall_64+0x26/0x620 [ 55.109189] __x64_sys_sendmsg+0x78/0xb0 [ 55.113232] do_syscall_64+0xfd/0x620 [ 55.117040] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.122222] RIP: 0033:0x4401b9 [ 55.125397] 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 [ 55.144280] RSP: 002b:00007ffe2cc41638 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.151968] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9 [ 55.159217] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 55.166467] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 55.173718] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 55.180982] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 55.188246] Modules linked in: [ 55.191639] ---[ end trace 5edc4d29c0d71f3b ]--- [ 55.196400] RIP: 0010:nfnetlink_parse_nat_setup+0x23a/0x450 [ 55.202124] Code: c3 89 c6 e8 f8 5c 6d fb 85 db 0f 88 8d 01 00 00 e8 6b 5b 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 [ 55.221157] RSP: 0018:ffff8880855bf148 EFLAGS: 00010203 [ 55.226519] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdb9f8 [ 55.233799] RDX: 0000000000000007 RSI: ffffffff85fdba05 RDI: 000000000000003d [ 55.241083] RBP: ffff8880855bf268 R08: ffff88808d2241c0 R09: ffff8880855bf1d0 [ 55.248352] R10: ffffed1010ab7e3f R11: ffff8880855bf1ff R12: ffff8880a7269800 [ 55.255643] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 [ 55.262927] FS: 00000000011ae880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 55.271178] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.277052] CR2: 000055b1a9fc9190 CR3: 0000000098a48000 CR4: 00000000001406e0 [ 55.284345] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.291735] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.298987] Kernel panic - not syncing: Fatal exception [ 55.305514] Kernel Offset: disabled [ 55.309135] Rebooting in 86400 seconds..