[ 42.410254] audit: type=1800 audit(1579445570.862:30): pid=7956 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: [ 47.938685] kauditd_printk_skb: 4 callbacks suppressed [ 47.938700] audit: type=1400 audit(1579445576.412:35): avc: denied { map } for pid=8131 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 '10.128.0.214' (ECDSA) to the list of known hosts. executing program [ 54.850337] audit: type=1400 audit(1579445583.322:36): avc: denied { map } for pid=8143 comm="syz-executor479" path="/root/syz-executor479788908" 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 [ 54.854100] kasan: CONFIG_KASAN_INLINE enabled [ 54.877444] audit: type=1400 audit(1579445583.322:37): avc: denied { create } for pid=8143 comm="syz-executor479" 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 [ 54.883117] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 54.906450] audit: type=1400 audit(1579445583.322:38): avc: denied { write } for pid=8143 comm="syz-executor479" 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 [ 54.914487] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 54.943895] CPU: 0 PID: 8143 Comm: syz-executor479 Not tainted 4.19.97-syzkaller #0 [ 54.951685] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.961043] RIP: 0010:get_unique_tuple+0x27a/0x1d40 [ 54.966060] Code: c1 e9 03 80 3c 11 00 0f 85 cb 17 00 00 4a 8b 14 e5 40 e0 ce 89 4c 8d 24 c2 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 97 17 00 00 49 8b 04 24 48 89 85 08 ff ff ff e8 [ 54.985323] RSP: 0018:ffff8880988e6d70 EFLAGS: 00010246 [ 54.990679] RAX: dffffc0000000000 RBX: ffff8880988e6f28 RCX: 1ffffffff139dc5b [ 54.997976] RDX: 0000000000000000 RSI: ffffffff85fd93a7 RDI: ffffffff89cee2d8 [ 55.005432] RBP: ffff8880988e6ec8 R08: ffff88809000a380 R09: ffffed1015d04733 [ 55.012798] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 [ 55.020131] R13: 0000000000000001 R14: ffff88808adeb480 R15: ffff8880988e6f78 [ 55.027832] FS: 000000000155e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 55.036139] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.042187] CR2: 000055acd6912190 CR3: 000000009016e000 CR4: 00000000001406f0 [ 55.049598] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.057677] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.068788] Call Trace: [ 55.071661] ? nf_ct_invert_tuplepr+0x125/0x200 [ 55.077281] ? find_held_lock+0x35/0x130 [ 55.081427] ? hash_by_src+0x3c0/0x3c0 [ 55.085317] ? lock_downgrade+0x880/0x880 [ 55.089542] ? kasan_check_read+0x11/0x20 [ 55.093702] nf_nat_setup_info+0x212/0x9e0 [ 55.097992] ? nf_nat_proto_clean+0x200/0x200 [ 55.102481] ? save_stack+0x45/0xd0 [ 55.106101] ? kasan_kmalloc+0xce/0xf0 [ 55.109974] ? kasan_slab_alloc+0xf/0x20 [ 55.114028] ? kmem_cache_alloc+0x12e/0x700 [ 55.118345] ? __nf_conntrack_alloc+0xdb/0x680 [ 55.122914] ? nf_conntrack_alloc+0x38/0x50 [ 55.127236] ? ctnetlink_create_conntrack+0xd0/0x1300 [ 55.132463] ? ctnetlink_new_conntrack+0x527/0xe50 [ 55.137453] ? nfnetlink_rcv_msg+0xd0d/0xfcf [ 55.141881] ? netlink_rcv_skb+0x17d/0x460 [ 55.146276] ? nfnetlink_rcv+0x1c0/0x460 [ 55.150345] ? netlink_unicast+0x53a/0x730 [ 55.154574] ? netlink_sendmsg+0x8ae/0xd70 [ 55.158852] ? sock_sendmsg+0xd7/0x130 [ 55.162750] ? ___sys_sendmsg+0x803/0x920 [ 55.166908] ? __sys_sendmsg+0x105/0x1d0 [ 55.171059] ? __x64_sys_sendmsg+0x78/0xb0 [ 55.175301] ? do_syscall_64+0xfd/0x620 [ 55.179348] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.184705] ? mark_held_locks+0x100/0x100 [ 55.188927] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 55.194018] ? depot_save_stack+0x1de/0x44f [ 55.198339] __nf_nat_alloc_null_binding+0x164/0x1d0 [ 55.203451] ? nf_nat_setup_info+0x9e0/0x9e0 [ 55.207864] nfnetlink_parse_nat_setup+0x3ca/0x450 [ 55.212793] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 55.216939] ? rcu_read_lock_sched_held+0x110/0x130 [ 55.221964] ? __lock_is_held+0xb6/0x140 [ 55.226017] ctnetlink_parse_nat_setup+0xc5/0x660 [ 55.230947] ctnetlink_create_conntrack+0x4ea/0x1300 [ 55.236044] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 55.240874] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 55.245883] ctnetlink_new_conntrack+0x527/0xe50 [ 55.250672] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 55.256029] ? find_held_lock+0x35/0x130 [ 55.260101] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 55.265294] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 55.270657] nfnetlink_rcv_msg+0xd0d/0xfcf [ 55.274886] ? nfnetlink_bind+0x2c0/0x2c0 [ 55.279033] ? avc_has_extended_perms+0x10f0/0x10f0 [ 55.284119] ? selinux_ipv4_output+0x50/0x50 [ 55.288544] ? mark_held_locks+0x100/0x100 [ 55.292770] netlink_rcv_skb+0x17d/0x460 [ 55.296835] ? nfnetlink_bind+0x2c0/0x2c0 [ 55.300981] ? netlink_ack+0xb30/0xb30 [ 55.304855] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.310432] ? ns_capable+0x23/0x30 [ 55.314044] ? __netlink_ns_capable+0x104/0x140 [ 55.318814] nfnetlink_rcv+0x1c0/0x460 [ 55.322702] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 55.327450] ? netlink_deliver_tap+0x254/0xc20 [ 55.332026] ? kasan_check_write+0x14/0x20 [ 55.336261] netlink_unicast+0x53a/0x730 [ 55.340320] ? netlink_attachskb+0x770/0x770 [ 55.344720] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.350426] netlink_sendmsg+0x8ae/0xd70 [ 55.354511] ? netlink_unicast+0x730/0x730 [ 55.358752] ? selinux_socket_sendmsg+0x36/0x40 [ 55.363413] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.368936] ? security_socket_sendmsg+0x8d/0xc0 [ 55.373685] ? netlink_unicast+0x730/0x730 [ 55.377967] sock_sendmsg+0xd7/0x130 [ 55.381718] ___sys_sendmsg+0x803/0x920 [ 55.385686] ? copy_msghdr_from_user+0x430/0x430 [ 55.390489] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.396046] ? __handle_mm_fault+0x7d1/0x3f80 [ 55.400553] ? copy_page_range+0x2030/0x2030 [ 55.404973] ? __do_page_fault+0x676/0xe90 [ 55.409222] ? find_held_lock+0x35/0x130 [ 55.413283] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 55.418812] ? __fget_light+0x1a9/0x230 [ 55.422870] ? __fdget+0x1b/0x20 [ 55.426232] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 55.431766] __sys_sendmsg+0x105/0x1d0 [ 55.435645] ? __ia32_sys_shutdown+0x80/0x80 [ 55.440037] ? up_read+0x1a/0x110 [ 55.443478] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 55.448283] ? do_syscall_64+0x26/0x620 [ 55.452250] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.457604] ? do_syscall_64+0x26/0x620 [ 55.461573] __x64_sys_sendmsg+0x78/0xb0 [ 55.465629] do_syscall_64+0xfd/0x620 [ 55.469480] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 55.474656] RIP: 0033:0x440419 [ 55.477832] 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 [ 55.496726] RSP: 002b:00007ffcebb51728 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 55.504421] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440419 [ 55.511771] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 55.519040] RBP: 00000000006ca018 R08: 0000000000000014 R09: 00000000004002c8 [ 55.526356] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000401ca0 [ 55.533701] R13: 0000000000401d30 R14: 0000000000000000 R15: 0000000000000000 [ 55.541284] Modules linked in: [ 55.545523] ---[ end trace 242778f100a0fd67 ]--- [ 55.550304] RIP: 0010:get_unique_tuple+0x27a/0x1d40 [ 55.555578] Code: c1 e9 03 80 3c 11 00 0f 85 cb 17 00 00 4a 8b 14 e5 40 e0 ce 89 4c 8d 24 c2 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 97 17 00 00 49 8b 04 24 48 89 85 08 ff ff ff e8 [ 55.574514] RSP: 0018:ffff8880988e6d70 EFLAGS: 00010246 [ 55.579880] RAX: dffffc0000000000 RBX: ffff8880988e6f28 RCX: 1ffffffff139dc5b [ 55.587324] RDX: 0000000000000000 RSI: ffffffff85fd93a7 RDI: ffffffff89cee2d8 [ 55.594612] RBP: ffff8880988e6ec8 R08: ffff88809000a380 R09: ffffed1015d04733 [ 55.601878] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 [ 55.609228] R13: 0000000000000001 R14: ffff88808adeb480 R15: ffff8880988e6f78 [ 55.616523] FS: 000000000155e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 55.624819] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.630708] CR2: 000055acd6912190 CR3: 000000009016e000 CR4: 00000000001406f0 [ 55.638066] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.645379] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.652642] Kernel panic - not syncing: Fatal exception [ 55.659245] Kernel Offset: disabled [ 55.662875] Rebooting in 86400 seconds..