[ 43.806075] audit: type=1800 audit(1579290679.295:29): pid=7958 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0 [ 43.845036] audit: type=1800 audit(1579290679.295:30): pid=7958 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 Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.476677] kauditd_printk_skb: 5 callbacks suppressed [ 52.476692] audit: type=1400 audit(1579290687.965:36): avc: denied { map } for pid=8143 comm="syz-executor329" path="/root/syz-executor329460063" 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 [ 52.481111] kasan: CONFIG_KASAN_INLINE enabled [ 52.482039] audit: type=1400 audit(1579290687.965:37): avc: denied { create } for pid=8143 comm="syz-executor329" 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 [ 52.508548] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.508569] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.508580] CPU: 0 PID: 8143 Comm: syz-executor329 Not tainted 4.19.96-syzkaller #0 [ 52.508590] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.508613] RIP: 0010:get_unique_tuple+0x27a/0x1d40 [ 52.508625] Code: c1 e9 03 80 3c 11 00 0f 85 cb 17 00 00 4a 8b 14 e5 40 df 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 [ 52.508634] RSP: 0018:ffff88809f99ed70 EFLAGS: 00010246 [ 52.508643] RAX: dffffc0000000000 RBX: ffff88809f99ef28 RCX: 1ffffffff139dc0d [ 52.508649] RDX: 0000000000000000 RSI: ffffffff85fd93a7 RDI: ffffffff89cee068 [ 52.508656] RBP: ffff88809f99eec8 R08: ffff888094b94700 R09: ffffed1015d04733 [ 52.508662] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 [ 52.508670] R13: 0000000000000001 R14: ffff88809ae3f380 R15: ffff88809f99ef78 [ 52.508681] FS: 00000000010a3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 52.508690] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.508697] CR2: 00000000200002c6 CR3: 000000009af38000 CR4: 00000000001406f0 [ 52.508706] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.508713] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.508716] Call Trace: [ 52.508735] ? nf_ct_invert_tuplepr+0x125/0x200 [ 52.508750] ? find_held_lock+0x35/0x130 [ 52.508770] ? hash_by_src+0x3c0/0x3c0 [ 52.517545] audit: type=1400 audit(1579290687.965:38): avc: denied { write } for pid=8143 comm="syz-executor329" 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 [ 52.537691] ? lock_downgrade+0x880/0x880 [ 52.537706] ? kasan_check_read+0x11/0x20 [ 52.537723] nf_nat_setup_info+0x212/0x9e0 [ 52.537740] ? nf_nat_proto_clean+0x200/0x200 [ 52.537753] ? save_stack+0x45/0xd0 [ 52.537770] ? kasan_kmalloc+0xce/0xf0 [ 52.739524] ? kasan_slab_alloc+0xf/0x20 [ 52.743636] ? kmem_cache_alloc+0x12e/0x700 [ 52.747961] ? __nf_conntrack_alloc+0xdb/0x680 [ 52.752768] ? nf_conntrack_alloc+0x38/0x50 [ 52.757101] ? ctnetlink_create_conntrack+0xd0/0x1300 [ 52.762279] ? ctnetlink_new_conntrack+0x527/0xe50 [ 52.767207] ? nfnetlink_rcv_msg+0xd0d/0xfcf [ 52.771706] ? netlink_rcv_skb+0x17d/0x460 [ 52.775946] ? nfnetlink_rcv+0x1c0/0x460 [ 52.780356] ? netlink_unicast+0x53a/0x730 [ 52.784592] ? netlink_sendmsg+0x8ae/0xd70 [ 52.788831] ? sock_sendmsg+0xd7/0x130 [ 52.792716] ? ___sys_sendmsg+0x803/0x920 [ 52.796858] ? __sys_sendmsg+0x105/0x1d0 [ 52.800919] ? __x64_sys_sendmsg+0x78/0xb0 [ 52.805147] ? do_syscall_64+0xfd/0x620 [ 52.809223] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.814581] ? mark_held_locks+0x100/0x100 [ 52.818821] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 52.824157] ? depot_save_stack+0x1de/0x44f [ 52.828490] __nf_nat_alloc_null_binding+0x164/0x1d0 [ 52.833723] ? nf_nat_setup_info+0x9e0/0x9e0 [ 52.838134] nfnetlink_parse_nat_setup+0x3ca/0x450 [ 52.843064] ? nf_nat_inet_fn+0x8b0/0x8b0 [ 52.847242] ? rcu_read_lock_sched_held+0x110/0x130 [ 52.852278] ? __lock_is_held+0xb6/0x140 [ 52.856340] ctnetlink_parse_nat_setup+0xc5/0x660 [ 52.861499] ctnetlink_create_conntrack+0x4ea/0x1300 [ 52.866606] ? ctnetlink_dump_table+0x12e0/0x12e0 [ 52.871574] ? __nf_conntrack_confirm+0x31e0/0x31e0 [ 52.876779] ctnetlink_new_conntrack+0x527/0xe50 [ 52.881537] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 52.887046] ? find_held_lock+0x35/0x130 [ 52.891188] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 52.896694] ? ctnetlink_create_conntrack+0x1300/0x1300 [ 52.902109] nfnetlink_rcv_msg+0xd0d/0xfcf [ 52.906460] ? nfnetlink_bind+0x2c0/0x2c0 [ 52.910600] ? avc_has_extended_perms+0x10f0/0x10f0 [ 52.915616] ? selinux_ipv4_output+0x50/0x50 [ 52.920026] ? mark_held_locks+0x100/0x100 [ 52.924401] netlink_rcv_skb+0x17d/0x460 [ 52.928464] ? nfnetlink_bind+0x2c0/0x2c0 [ 52.932616] ? netlink_ack+0xb30/0xb30 [ 52.936507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.942069] ? ns_capable+0x23/0x30 [ 52.945720] ? __netlink_ns_capable+0x104/0x140 [ 52.954573] nfnetlink_rcv+0x1c0/0x460 [ 52.958467] ? nfnetlink_rcv_batch+0x1750/0x1750 [ 52.963219] ? netlink_deliver_tap+0x254/0xc20 [ 52.967828] ? kasan_check_write+0x14/0x20 [ 52.972074] netlink_unicast+0x53a/0x730 [ 52.976207] ? netlink_attachskb+0x770/0x770 [ 52.980790] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.986576] netlink_sendmsg+0x8ae/0xd70 [ 52.991444] ? netlink_unicast+0x730/0x730 [ 52.995700] ? selinux_socket_sendmsg+0x36/0x40 [ 53.000372] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.005938] ? security_socket_sendmsg+0x8d/0xc0 [ 53.010697] ? netlink_unicast+0x730/0x730 [ 53.015084] sock_sendmsg+0xd7/0x130 [ 53.019025] ___sys_sendmsg+0x803/0x920 [ 53.023734] ? copy_msghdr_from_user+0x430/0x430 [ 53.028789] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.034686] ? __handle_mm_fault+0x7d1/0x3f80 [ 53.039185] ? copy_page_range+0x2030/0x2030 [ 53.043601] ? __do_page_fault+0x676/0xe90 [ 53.047840] ? find_held_lock+0x35/0x130 [ 53.051894] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.058824] ? __fget_light+0x1a9/0x230 [ 53.062837] ? __fdget+0x1b/0x20 [ 53.066203] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 53.077114] __sys_sendmsg+0x105/0x1d0 [ 53.081024] ? __ia32_sys_shutdown+0x80/0x80 [ 53.085438] ? up_read+0x1a/0x110 [ 53.088992] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.093845] ? do_syscall_64+0x26/0x620 [ 53.097942] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.103347] ? do_syscall_64+0x26/0x620 [ 53.107437] __x64_sys_sendmsg+0x78/0xb0 [ 53.111517] do_syscall_64+0xfd/0x620 [ 53.115442] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.120627] RIP: 0033:0x440599 [ 53.123818] 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 [ 53.143035] RSP: 002b:00007ffd5258cf28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 53.150766] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440599 [ 53.158684] RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000003 [ 53.166098] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 53.173710] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000401e20 [ 53.181089] R13: 0000000000401eb0 R14: 0000000000000000 R15: 0000000000000000 [ 53.188490] Modules linked in: [ 53.196552] ---[ end trace 9e3e9bec6421706e ]--- [ 53.203115] RIP: 0010:get_unique_tuple+0x27a/0x1d40 [ 53.208444] Code: c1 e9 03 80 3c 11 00 0f 85 cb 17 00 00 4a 8b 14 e5 40 df 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 [ 53.229863] RSP: 0018:ffff88809f99ed70 EFLAGS: 00010246 [ 53.236928] RAX: dffffc0000000000 RBX: ffff88809f99ef28 RCX: 1ffffffff139dc0d [ 53.246125] RDX: 0000000000000000 RSI: ffffffff85fd93a7 RDI: ffffffff89cee068 [ 53.253416] RBP: ffff88809f99eec8 R08: ffff888094b94700 R09: ffffed1015d04733 [ 53.260913] R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000000 [ 53.268223] R13: 0000000000000001 R14: ffff88809ae3f380 R15: ffff88809f99ef78 [ 53.275636] FS: 00000000010a3880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 53.284237] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 53.290360] CR2: 00000000200002c6 CR3: 000000009af38000 CR4: 00000000001406f0 [ 53.297706] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 53.305262] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 53.313230] Kernel panic - not syncing: Fatal exception [ 53.320255] Kernel Offset: disabled [ 53.323893] Rebooting in 86400 seconds..