Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.30' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.992298] netlink: 42728 bytes leftover after parsing attributes in process `syz-executor309'. [ 28.001469] netlink: 200 bytes leftover after parsing attributes in process `syz-executor309'. [ 28.011340] kasan: CONFIG_KASAN_INLINE enabled [ 28.016474] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.023846] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.030051] Modules linked in: [ 28.033222] CPU: 0 PID: 7957 Comm: syz-executor309 Not tainted 4.14.302-syzkaller #0 [ 28.041174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 28.050681] task: ffff88809fd666c0 task.stack: ffff88809ad28000 [ 28.056720] RIP: 0010:ipt_init_target+0x97/0x250 [ 28.061451] RSP: 0018:ffff88809ad2f160 EFLAGS: 00010202 [ 28.066792] RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000000 [ 28.074080] RDX: 0000000000000007 RSI: 0000000000000010 RDI: 000000000000002f [ 28.081331] RBP: 0000000000000010 R08: 0000000000000001 R09: ffffed10165e9fa0 [ 28.088579] R10: ffff8880b2f4fd06 R11: 0000000000000000 R12: 1ffff110135a5e2f [ 28.095959] R13: ffff88809ad2f1e8 R14: 0000000000000010 R15: ffffffff89cdb740 [ 28.103220] FS: 0000555556c7d300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.111429] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.117299] CR2: 000000002000d300 CR3: 000000009cc98000 CR4: 00000000003406f0 [ 28.124552] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.131802] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.139133] Call Trace: [ 28.141704] ? tcf_ipt_walker+0x200/0x200 [ 28.145826] ? __local_bh_enable_ip+0xc1/0x170 [ 28.150389] ? fs_reclaim_release+0xd0/0x110 [ 28.154782] ? memcpy+0x35/0x50 [ 28.158037] __tcf_ipt_init+0x48d/0xc00 [ 28.161993] ? ipt_init_target+0x250/0x250 [ 28.166204] ? tc_lookup_action_n+0xac/0xd0 [ 28.170636] ? lock_downgrade+0x740/0x740 [ 28.174770] tcf_ipt_init+0x43/0x50 [ 28.178377] tcf_action_init_1+0x51a/0x9e0 [ 28.182598] ? tcf_action_dump_old+0x80/0x80 [ 28.186985] ? __up_console_sem+0xa9/0x1b0 [ 28.191195] ? nla_parse+0x157/0x1f0 [ 28.194881] tcf_action_init+0x26d/0x400 [ 28.199023] ? tcf_action_init_1+0x9e0/0x9e0 [ 28.203425] ? nla_parse+0x157/0x1f0 [ 28.207127] tc_ctl_action+0x2e3/0x510 [ 28.210990] ? tca_action_gd+0x790/0x790 [ 28.215027] ? rtnetlink_rcv_msg+0x2e8/0xb10 [ 28.219410] ? tca_action_gd+0x790/0x790 [ 28.223443] rtnetlink_rcv_msg+0x3be/0xb10 [ 28.227654] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 28.232134] ? __netlink_lookup+0x345/0x5d0 [ 28.236440] netlink_rcv_skb+0x125/0x390 [ 28.240481] ? rtnl_calcit.isra.0+0x3a0/0x3a0 [ 28.244956] ? netlink_ack+0x9a0/0x9a0 [ 28.248823] netlink_unicast+0x437/0x610 [ 28.252876] ? netlink_sendskb+0xd0/0xd0 [ 28.256914] ? __check_object_size+0x179/0x230 [ 28.261478] netlink_sendmsg+0x648/0xbc0 [ 28.265520] ? nlmsg_notify+0x1b0/0x1b0 [ 28.269470] ? kernel_recvmsg+0x210/0x210 [ 28.273594] ? security_socket_sendmsg+0x83/0xb0 [ 28.278324] ? nlmsg_notify+0x1b0/0x1b0 [ 28.282275] sock_sendmsg+0xb5/0x100 [ 28.286080] ___sys_sendmsg+0x6c8/0x800 [ 28.290117] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 28.294847] ? lock_downgrade+0x740/0x740 [ 28.298990] ? __lru_cache_add+0x178/0x250 [ 28.303200] ? do_raw_spin_unlock+0x164/0x220 [ 28.307672] ? _raw_spin_unlock+0x29/0x40 [ 28.311823] ? do_huge_pmd_anonymous_page+0x72e/0x1700 [ 28.317077] ? prep_transhuge_page+0xa0/0xa0 [ 28.321458] ? _raw_spin_unlock+0x29/0x40 [ 28.325580] ? __pmd_alloc+0x27f/0x3f0 [ 28.329442] ? __handle_mm_fault+0x80f/0x4620 [ 28.333912] ? lock_downgrade+0x740/0x740 [ 28.338049] ? vm_insert_page+0x7c0/0x7c0 [ 28.342174] ? __fdget+0x167/0x1f0 [ 28.345688] ? sockfd_lookup_light+0xb2/0x160 [ 28.350184] __sys_sendmsg+0xa3/0x120 [ 28.353981] ? SyS_shutdown+0x160/0x160 [ 28.357947] ? up_read+0x17/0x30 [ 28.361288] ? __do_page_fault+0x159/0xad0 [ 28.365496] SyS_sendmsg+0x27/0x40 [ 28.369010] ? __sys_sendmsg+0x120/0x120 [ 28.373045] do_syscall_64+0x1d5/0x640 [ 28.376910] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.382076] RIP: 0033:0x7f9c96467059 [ 28.385760] RSP: 002b:00007ffde3272da8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 28.393442] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9c96467059 [ 28.400685] RDX: 0000000000000000 RSI: 000000002000d300 RDI: 0000000000000003 [ 28.407930] RBP: 00007f9c9642b040 R08: 0000000000000000 R09: 0000000000000000 [ 28.415176] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9c9642b0d0 [ 28.422421] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 28.429670] Code: e8 ef b8 80 fb 31 c0 b9 0e 00 00 00 4c 8d ac 24 88 00 00 00 4c 89 ef f3 48 ab 48 8d 7d 1f 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 <0f> b6 04 18 38 d0 7f 08 84 c0 0f 85 67 01 00 00 0f b6 55 1f 48 [ 28.448823] RIP: ipt_init_target+0x97/0x250 RSP: ffff88809ad2f160 [ 28.464393] ---[ end trace 755f7805b88b1aba ]--- [ 28.469162] Kernel panic - not syncing: Fatal exception [ 28.474571] Kernel Offset: disabled [ 28.478199] Rebooting in 86400 seconds..