[ 41.561100] audit: type=1800 audit(1579614854.265:30): pid=7930 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: [ 45.886015] kauditd_printk_skb: 4 callbacks suppressed [ 45.886030] audit: type=1400 audit(1579614858.635:35): avc: denied { map } for pid=8106 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 '10.128.0.81' (ECDSA) to the list of known hosts. executing program [ 52.648379] audit: type=1400 audit(1579614865.395:36): avc: denied { map } for pid=8118 comm="syz-executor109" path="/root/syz-executor109539428" 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 [ 52.652692] netlink: 4 bytes leftover after parsing attributes in process `syz-executor109'. [ 52.674900] audit: type=1400 audit(1579614865.395:37): avc: denied { create } for pid=8118 comm="syz-executor109" 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 [ 52.683654] kasan: CONFIG_KASAN_INLINE enabled [ 52.710039] audit: type=1400 audit(1579614865.395:38): avc: denied { write } for pid=8118 comm="syz-executor109" 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 [ 52.713023] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.744354] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.750582] CPU: 0 PID: 8118 Comm: syz-executor109 Not tainted 4.19.97-syzkaller #0 [ 52.758363] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.767775] RIP: 0010:nfnetlink_parse_nat_setup+0x23a/0x450 [ 52.773477] 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 [ 52.792370] RSP: 0018:ffff8880a80f7148 EFLAGS: 00010202 [ 52.797728] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 52.805089] RDX: 0000000000000008 RSI: ffffffff85fdca05 RDI: 0000000000000041 [ 52.812368] RBP: ffff8880a80f7268 R08: ffff8880903e2600 R09: ffff8880903e2ea0 [ 52.819630] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a7ee5800 [ 52.826959] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000009 [ 52.834224] FS: 0000000001f2d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 52.842610] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.848497] CR2: 0000562295937190 CR3: 00000000a35d0000 CR4: 00000000001406f0 [ 52.855769] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.863027] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.870322] Call Trace: [ 52.872906] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 52.877058] ctnetlink_parse_nat_setup+0xc5/0x660 [ 52.881981] ctnetlink_create_conntrack+0x532/0x1300 [ 52.887085] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 52.891931] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 52.896946] ctnetlink_new_conntrack+0x527/0xe50 [ 52.901698] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 52.907112] ? find_held_lock+0x35/0x130 [ 52.911161] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 52.916343] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 52.921696] nfnetlink_rcv_msg+0xd0d/0xfcf [ 52.925922] ? nfnetlink_bind+0x2c0/0x2c0 [ 52.930057] ? avc_has_extended_perms+0x10f0/0x10f0 [ 52.935065] ? selinux_ipv4_output+0x50/0x50 [ 52.939474] ? mark_held_locks+0x100/0x100 [ 52.943696] netlink_rcv_skb+0x17d/0x460 [ 52.947741] ? nfnetlink_bind+0x2c0/0x2c0 [ 52.951873] ? netlink_ack+0xb30/0xb30 [ 52.955760] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.961283] ? ns_capable+0x23/0x30 [ 52.964907] ? __netlink_ns_capable+0x104/0x140 [ 52.969612] nfnetlink_rcv+0x1c0/0x460 [ 52.973533] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 52.978344] ? netlink_deliver_tap+0x254/0xc20 [ 52.983019] ? kasan_check_write+0x14/0x20 [ 52.987249] netlink_unicast+0x53a/0x730 [ 52.991301] ? netlink_attachskb+0x770/0x770 [ 52.995706] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.001245] netlink_sendmsg+0x8ae/0xd70 [ 53.005296] ? netlink_unicast+0x730/0x730 [ 53.009521] ? selinux_socket_sendmsg+0x36/0x40 [ 53.014190] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.019726] ? security_socket_sendmsg+0x8d/0xc0 [ 53.024484] ? netlink_unicast+0x730/0x730 [ 53.028705] sock_sendmsg+0xd7/0x130 [ 53.032403] ___sys_sendmsg+0x803/0x920 [ 53.036378] ? copy_msghdr_from_user+0x430/0x430 [ 53.041136] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.046661] ? __handle_mm_fault+0x7d1/0x3f80 [ 53.051144] ? copy_page_range+0x2030/0x2030 [ 53.055592] ? __do_page_fault+0x676/0xe90 [ 53.059814] ? find_held_lock+0x35/0x130 [ 53.063916] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.069441] ? __fget_light+0x1a9/0x230 [ 53.073417] ? __fdget+0x1b/0x20 [ 53.076765] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.082297] __sys_sendmsg+0x105/0x1d0 [ 53.086166] ? __ia32_sys_shutdown+0x80/0x80 [ 53.090557] ? up_read+0x1a/0x110 [ 53.093999] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.098738] ? do_syscall_64+0x26/0x620 [ 53.102696] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.108040] ? do_syscall_64+0x26/0x620 [ 53.111998] __x64_sys_sendmsg+0x78/0xb0 [ 53.116042] do_syscall_64+0xfd/0x620 [ 53.119827] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.125001] RIP: 0033:0x4401a9 [ 53.128177] 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 [ 53.147061] RSP: 002b:00007fff02743a18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 53.154752] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401a9 [ 53.162003] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 53.169275] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.176532] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a30 [ 53.183785] R13: 0000000000401ac0 R14: 0000000000000000 R15: 0000000000000000 [ 53.191051] Modules linked in: [ 53.194633] ---[ end trace f9124423602183f7 ]--- [ 53.199417] RIP: 0010:nfnetlink_parse_nat_setup+0x23a/0x450 [ 53.205148] 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 [ 53.224067] RSP: 0018:ffff8880a80f7148 EFLAGS: 00010202 [ 53.229415] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85fdc9f8 [ 53.236696] RDX: 0000000000000008 RSI: ffffffff85fdca05 RDI: 0000000000000041 [ 53.243979] RBP: ffff8880a80f7268 R08: ffff8880903e2600 R09: ffff8880903e2ea0 [ 53.251233] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a7ee5800 [ 53.258530] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000009 [ 53.265826] FS: 0000000001f2d880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 53.274064] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.279955] CR2: 0000562295937190 CR3: 00000000a35d0000 CR4: 00000000001406f0 [ 53.287239] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.294528] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.301781] Kernel panic - not syncing: Fatal exception [ 53.308414] Kernel Offset: disabled [ 53.312037] Rebooting in 86400 seconds..