[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.248437] kasan: CONFIG_KASAN_INLINE enabled [ 49.253773] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 49.261457] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 49.267695] CPU: 0 PID: 6437 Comm: syz-executor148 Not tainted 4.19.114-syzkaller #0 [ 49.275852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.285217] RIP: 0010:nfnetlink_parse_nat_setup+0x21a/0x410 [ 49.290926] Code: c3 89 c6 e8 18 c8 94 fb 85 db 0f 88 72 01 00 00 e8 9b c6 94 fb 49 8d 7e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d2 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38 [ 49.310331] RSP: 0018:ffff88808966f1e0 EFLAGS: 00010202 [ 49.315718] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d2ddc8 [ 49.323018] RDX: 0000006000000007 RSI: ffffffff85d2ddd5 RDI: 000003000000003a [ 49.330272] RBP: ffff88809e441c80 R08: ffff8880a525c200 R09: ffff88808966f260 [ 49.337591] R10: ffffed10112cde51 R11: ffff88808966f28f R12: 0000000000000000 [ 49.344920] R13: 0000000000000001 R14: 0000030000000002 R15: ffff88808966f210 [ 49.352274] FS: 00000000006f9880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 49.360490] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.366364] CR2: 0000000020000280 CR3: 000000008ce4c000 CR4: 00000000001406f0 [ 49.373665] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.380919] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.388212] Call Trace: [ 49.390791] ? nf_nat_inet_fn+0x8c0/0x8c0 [ 49.396378] ? __lock_is_held+0xad/0x140 [ 49.400426] ctnetlink_parse_nat_setup+0xb6/0x640 [ 49.405255] ctnetlink_create_conntrack+0x4b7/0x1280 [ 49.410373] ? ctnetlink_dump_table+0x11e0/0x11e0 [ 49.415209] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 49.420384] ? hash_conntrack_raw+0x2d3/0x450 [ 49.424862] ? nf_ct_unconfirmed_destroy+0xa0/0xa0 [ 49.429792] ? __nf_conntrack_confirm+0x2fc0/0x2fc0 [ 49.434825] ctnetlink_new_conntrack+0x4f5/0xde0 [ 49.439584] ? ctnetlink_create_conntrack+0x1280/0x1280 [ 49.444943] ? mutex_trylock+0x1a0/0x1a0 [ 49.449011] ? __lock_is_held+0xad/0x140 [ 49.453081] ? check_preemption_disabled+0x41/0x280 [ 49.458098] ? ctnetlink_create_conntrack+0x1280/0x1280 [ 49.463465] nfnetlink_rcv_msg+0xc9e/0xf4b [ 49.467695] ? nfnetlink_bind+0x2b0/0x2b0 [ 49.471837] ? __lock_acquire+0x6ee/0x49c0 [ 49.476081] ? __alloc_skb+0xef/0x5b0 [ 49.479874] ? cred_has_capability+0x162/0x2e0 [ 49.484443] ? cred_has_capability+0x16d/0x2e0 [ 49.489013] ? selinux_ipv4_output+0x50/0x50 [ 49.493406] ? selinux_ipv4_output+0x50/0x50 [ 49.497801] netlink_rcv_skb+0x160/0x410 [ 49.501847] ? nfnetlink_bind+0x2b0/0x2b0 [ 49.506001] ? netlink_ack+0xa60/0xa60 [ 49.509899] ? ns_capable_common+0xe2/0x100 [ 49.514298] nfnetlink_rcv+0x1b2/0x420 [ 49.518174] ? nfnetlink_rcv_batch+0x15e0/0x15e0 [ 49.522920] netlink_unicast+0x4d7/0x6a0 [ 49.526968] ? netlink_attachskb+0x710/0x710 [ 49.531361] netlink_sendmsg+0x80b/0xcd0 [ 49.535426] ? netlink_unicast+0x6a0/0x6a0 [ 49.539661] ? move_addr_to_kernel.part.0+0x110/0x110 [ 49.545026] ? netlink_unicast+0x6a0/0x6a0 [ 49.549268] sock_sendmsg+0xcf/0x120 [ 49.552967] ___sys_sendmsg+0x803/0x920 [ 49.556936] ? copy_msghdr_from_user+0x410/0x410 [ 49.561692] ? rcu_read_lock_sched_held+0x10a/0x130 [ 49.566690] ? kmem_cache_alloc+0x31b/0x710 [ 49.570997] ? percpu_counter_add_batch+0x123/0x180 [ 49.576000] ? alloc_empty_file+0xd7/0x170 [ 49.580221] ? find_held_lock+0x2d/0x110 [ 49.584286] ? __fd_install+0x1b4/0x610 [ 49.588241] ? __fget_light+0x1a2/0x230 [ 49.592200] __sys_sendmsg+0xec/0x1b0 [ 49.595984] ? __ia32_sys_shutdown+0x70/0x70 [ 49.600377] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.605112] ? trace_hardirqs_off_caller+0x55/0x210 [ 49.610111] ? do_syscall_64+0x21/0x620 [ 49.614065] do_syscall_64+0xf9/0x620 [ 49.617851] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.623034] RIP: 0033:0x440239 [ 49.626210] 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 [ 49.645096] RSP: 002b:00007ffd0dbc1678 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 49.652804] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 49.660059] RDX: 0000000000000000 RSI: 0000000020000640 RDI: 0000000000000003 [ 49.667309] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 49.674560] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ac0 [ 49.682107] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 49.689367] Modules linked in: [ 49.693072] ---[ end trace 72f56379eaa3eb61 ]--- [ 49.697846] RIP: 0010:nfnetlink_parse_nat_setup+0x21a/0x410 [ 49.703620] Code: c3 89 c6 e8 18 c8 94 fb 85 db 0f 88 72 01 00 00 e8 9b c6 94 fb 49 8d 7e 38 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d2 01 00 00 48 8b 7c 24 08 4c 89 fe 41 ff 56 38 [ 49.722752] RSP: 0018:ffff88808966f1e0 EFLAGS: 00010202 [ 49.728120] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff85d2ddc8 [ 49.735424] RDX: 0000006000000007 RSI: ffffffff85d2ddd5 RDI: 000003000000003a [ 49.742747] RBP: ffff88809e441c80 R08: ffff8880a525c200 R09: ffff88808966f260 [ 49.750053] R10: ffffed10112cde51 R11: ffff88808966f28f R12: 0000000000000000 [ 49.757334] R13: 0000000000000001 R14: 0000030000000002 R15: ffff88808966f210 [ 49.764638] FS: 00000000006f9880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 49.772917] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 49.778796] CR2: 0000000020000280 CR3: 000000008ce4c000 CR4: 00000000001406f0 [ 49.786117] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 49.793429] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 49.800744] Kernel panic - not syncing: Fatal exception [ 49.807414] Kernel Offset: disabled [ 49.811038] Rebooting in 86400 seconds..