[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.144736] kasan: CONFIG_KASAN_INLINE enabled [ 44.149498] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.157253] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.163496] CPU: 1 PID: 6461 Comm: syz-executor121 Not tainted 4.19.114-syzkaller #0 [ 44.171355] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.180703] RIP: 0010:get_unique_tuple+0x27a/0x1d50 [ 44.185710] Code: c1 e9 03 80 3c 11 00 0f 85 cd 17 00 00 4a 8b 14 e5 a0 0f 8e 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 99 17 00 00 49 8b 04 24 48 89 85 08 ff ff ff e8 [ 44.204596] RSP: 0018:ffff888089a5ee18 EFLAGS: 00010246 [ 44.209938] RAX: dffffc0000000000 RBX: ffff888089a5efc0 RCX: 1ffffffff131c280 [ 44.217188] RDX: 0000000000000000 RSI: ffffffff85d2a937 RDI: ffffffff898e1400 [ 44.224437] RBP: ffff888089a5ef70 R08: ffff8880a7b8a200 R09: ffffed1015ce4733 [ 44.231683] R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: 0000000000000003 [ 44.238941] R13: 0000000000000001 R14: ffff888089a5f010 R15: ffff88809fed0dc0 [ 44.246194] FS: 0000000001821880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 44.254407] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.260273] CR2: 0000000020000280 CR3: 0000000097c9e000 CR4: 00000000001406e0 [ 44.267533] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.274787] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.282036] Call Trace: [ 44.284650] ? find_held_lock+0x2d/0x110 [ 44.288694] ? nft_rt_get_eval.cold+0x55/0x55 [ 44.293172] ? nf_ct_invert_tuplepr+0x118/0x1f0 [ 44.297822] ? hash_by_src+0x3a0/0x3a0 [ 44.301688] ? lock_downgrade+0x740/0x740 [ 44.305820] ? check_preemption_disabled+0x41/0x280 [ 44.310845] nf_nat_setup_info+0x1c3/0x840 [ 44.315064] ? nf_nat_proto_clean+0x1f0/0x1f0 [ 44.319543] ? _raw_spin_unlock_irqrestore+0xa0/0xe0 [ 44.324632] ? save_stack+0x89/0xa0 [ 44.328247] ? kasan_kmalloc+0xbf/0xe0 [ 44.332118] ? kmem_cache_alloc+0x127/0x710 [ 44.336461] ? __nf_conntrack_alloc+0xd6/0x670 [ 44.341021] ? ctnetlink_create_conntrack+0xb1/0x1280 [ 44.346191] ? ctnetlink_new_conntrack+0x4f5/0xde0 [ 44.351100] ? nfnetlink_rcv_msg+0xc9e/0xf4b [ 44.355487] ? netlink_rcv_skb+0x160/0x410 [ 44.359700] ? nfnetlink_rcv+0x1b2/0x420 [ 44.363744] ? netlink_unicast+0x4d7/0x6a0 [ 44.367971] ? netlink_sendmsg+0x80b/0xcd0 [ 44.372185] ? sock_sendmsg+0xcf/0x120 [ 44.376053] ? ___sys_sendmsg+0x803/0x920 [ 44.380185] ? __sys_sendmsg+0xec/0x1b0 [ 44.384143] ? do_syscall_64+0xf9/0x620 [ 44.388098] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.393447] __nf_nat_alloc_null_binding+0x164/0x1d0 [ 44.398642] ? nf_nat_setup_info+0x840/0x840 [ 44.403045] ? mark_held_locks+0xf0/0xf0 [ 44.407095] ? __lock_is_held+0xad/0x140 [ 44.411170] ? nft_rt_get_eval.cold+0x55/0x55 [ 44.415649] nfnetlink_parse_nat_setup+0x38f/0x410 [ 44.420560] ? nf_nat_inet_fn+0x8c0/0x8c0 [ 44.424695] ? __nf_conntrack_alloc+0xd6/0x670 [ 44.429258] ? __lock_is_held+0xad/0x140 [ 44.433301] ctnetlink_parse_nat_setup+0xb6/0x640 [ 44.438126] ctnetlink_create_conntrack+0x4b7/0x1280 [ 44.443209] ? ctnetlink_dump_table+0x11e0/0x11e0 [ 44.448031] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 44.453228] ? hash_conntrack_raw+0x2d3/0x450 [ 44.457705] ? nf_ct_unconfirmed_destroy+0xa0/0xa0 [ 44.462613] ? __nf_conntrack_confirm+0x2fc0/0x2fc0 [ 44.467621] ctnetlink_new_conntrack+0x4f5/0xde0 [ 44.472358] ? ctnetlink_create_conntrack+0x1280/0x1280 [ 44.477715] ? mutex_trylock+0x1a0/0x1a0 [ 44.481760] ? __lock_is_held+0xad/0x140 [ 44.485807] ? check_preemption_disabled+0x41/0x280 [ 44.490807] ? ctnetlink_create_conntrack+0x1280/0x1280 [ 44.496151] nfnetlink_rcv_msg+0xc9e/0xf4b [ 44.500368] ? nfnetlink_bind+0x2b0/0x2b0 [ 44.504501] ? __lock_acquire+0x6ee/0x49c0 [ 44.508727] ? __alloc_skb+0xef/0x5b0 [ 44.512522] ? cred_has_capability+0x162/0x2e0 [ 44.517096] ? cred_has_capability+0x16d/0x2e0 [ 44.521660] ? selinux_ipv4_output+0x50/0x50 [ 44.526058] ? selinux_ipv4_output+0x50/0x50 [ 44.530461] netlink_rcv_skb+0x160/0x410 [ 44.534512] ? nfnetlink_bind+0x2b0/0x2b0 [ 44.538640] ? netlink_ack+0xa60/0xa60 [ 44.542517] ? ns_capable_common+0xe2/0x100 [ 44.546849] nfnetlink_rcv+0x1b2/0x420 [ 44.550718] ? nfnetlink_rcv_batch+0x15e0/0x15e0 [ 44.555459] netlink_unicast+0x4d7/0x6a0 [ 44.559501] ? netlink_attachskb+0x710/0x710 [ 44.563890] netlink_sendmsg+0x80b/0xcd0 [ 44.567960] ? netlink_unicast+0x6a0/0x6a0 [ 44.572176] ? move_addr_to_kernel.part.0+0x110/0x110 [ 44.577357] ? netlink_unicast+0x6a0/0x6a0 [ 44.581572] sock_sendmsg+0xcf/0x120 [ 44.585266] ___sys_sendmsg+0x803/0x920 [ 44.589282] ? copy_msghdr_from_user+0x410/0x410 [ 44.594020] ? rcu_read_lock_sched_held+0x10a/0x130 [ 44.599030] ? kmem_cache_alloc+0x31b/0x710 [ 44.603346] ? percpu_counter_add_batch+0x123/0x180 [ 44.608353] ? alloc_empty_file+0xd7/0x170 [ 44.612586] ? find_held_lock+0x2d/0x110 [ 44.616640] ? __fd_install+0x1b4/0x610 [ 44.620594] ? __fget_light+0x1a2/0x230 [ 44.624553] __sys_sendmsg+0xec/0x1b0 [ 44.628334] ? __ia32_sys_shutdown+0x70/0x70 [ 44.632730] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 44.637464] ? trace_hardirqs_off_caller+0x55/0x210 [ 44.642459] ? do_syscall_64+0x21/0x620 [ 44.646413] do_syscall_64+0xf9/0x620 [ 44.650204] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 44.655377] RIP: 0033:0x440229 [ 44.658551] 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 [ 44.677438] RSP: 002b:00007ffd7b4f9678 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 44.685128] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440229 [ 44.692377] RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003 [ 44.699627] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 44.706903] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ab0 [ 44.714246] R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000 [ 44.721509] Modules linked in: [ 44.725733] ---[ end trace 251b0d6574e15545 ]--- [ 44.737052] RIP: 0010:get_unique_tuple+0x27a/0x1d50 [ 44.742090] Code: c1 e9 03 80 3c 11 00 0f 85 cd 17 00 00 4a 8b 14 e5 a0 0f 8e 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 99 17 00 00 49 8b 04 24 48 89 85 08 ff ff ff e8 [ 44.761068] RSP: 0018:ffff888089a5ee18 EFLAGS: 00010246 [ 44.766497] RAX: dffffc0000000000 RBX: ffff888089a5efc0 RCX: 1ffffffff131c280 [ 44.773824] RDX: 0000000000000000 RSI: ffffffff85d2a937 RDI: ffffffff898e1400 [ 44.781102] RBP: ffff888089a5ef70 R08: ffff8880a7b8a200 R09: ffffed1015ce4733 [ 44.788394] R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: 0000000000000003 [ 44.795716] R13: 0000000000000001 R14: ffff888089a5f010 R15: ffff88809fed0dc0 [ 44.803027] FS: 0000000001821880(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 44.811259] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.817176] CR2: 0000000020000280 CR3: 0000000097c9e000 CR4: 00000000001406e0 [ 44.824511] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.831809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.839119] Kernel panic - not syncing: Fatal exception [ 44.845504] Kernel Offset: disabled [ 44.849123] Rebooting in 86400 seconds..