[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 82.743277][ T27] audit: type=1800 audit(1579199567.203:25): pid=9357 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.763595][ T27] audit: type=1800 audit(1579199567.203:26): pid=9357 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.798739][ T27] audit: type=1800 audit(1579199567.203:27): pid=9357 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.170' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.802001][ T9507] kasan: CONFIG_KASAN_INLINE enabled [ 92.807370][ T9507] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 92.816788][ T9507] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 92.823729][ T9507] CPU: 0 PID: 9507 Comm: syz-executor347 Not tainted 5.5.0-rc6-syzkaller #0 [ 92.832384][ T9507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.842488][ T9507] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 92.848560][ T9507] Code: e8 5f 27 0e fb 41 83 fd 05 0f 87 62 05 00 00 e8 d0 25 0e fb 49 8d 7c 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a6 05 00 00 44 89 e9 be 01 00 [ 92.868150][ T9507] RSP: 0018:ffffc90006257100 EFLAGS: 00010206 [ 92.874203][ T9507] RAX: dffffc0000000000 RBX: ffffc900062572b0 RCX: ffffffff8666cfa1 [ 92.882164][ T9507] RDX: 0000000000000003 RSI: ffffffff8666cfb0 RDI: 0000000000000018 [ 92.890119][ T9507] RBP: ffffc900062571f0 R08: ffff88809329a640 R09: 0000000000000000 [ 92.898077][ T9507] R10: fffff52000c4ae2f R11: ffffc9000625717f R12: 0000000000000000 [ 92.906028][ T9507] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900062571c8 [ 92.913983][ T9507] FS: 00000000022f6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.922952][ T9507] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.929513][ T9507] CR2: 0000000020000280 CR3: 00000000a6f40000 CR4: 00000000001406f0 [ 92.937510][ T9507] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.945460][ T9507] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.953413][ T9507] Call Trace: [ 92.956694][ T9507] ? nf_tables_newset+0x2620/0x2620 [ 92.961913][ T9507] ? nft_trans_rule_add+0x2d0/0x2d0 [ 92.967091][ T9507] ? __kasan_check_read+0x11/0x20 [ 92.972104][ T9507] nf_tables_addchain.constprop.0+0x1c1/0x1520 [ 92.978280][ T9507] ? nft_chain_parse_hook+0xa10/0xa10 [ 92.983725][ T9507] ? nla_strcmp+0xe3/0x120 [ 92.988125][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.994351][ T9507] ? nft_table_lookup+0x154/0x1b0 [ 92.999355][ T9507] nf_tables_newchain+0x1033/0x1820 [ 93.004544][ T9507] ? __mutex_lock+0x458/0x13c0 [ 93.009332][ T9507] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 93.015734][ T9507] ? nla_memcpy+0xb0/0xb0 [ 93.020053][ T9507] ? __nla_parse+0x43/0x60 [ 93.024450][ T9507] nfnetlink_rcv_batch+0xf42/0x17a0 [ 93.029630][ T9507] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 93.036145][ T9507] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 93.041943][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.048172][ T9507] ? apparmor_capable+0x497/0x900 [ 93.053187][ T9507] ? __nla_validate_parse+0x2d0/0x1ee0 [ 93.058633][ T9507] ? cap_capable+0x205/0x270 [ 93.063203][ T9507] ? nla_memcpy+0xb0/0xb0 [ 93.067512][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.073736][ T9507] ? ns_capable_common+0x93/0x100 [ 93.078751][ T9507] ? __nla_parse+0x43/0x60 [ 93.083187][ T9507] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 93.088898][ T9507] nfnetlink_rcv+0x3e7/0x460 [ 93.093478][ T9507] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 93.098924][ T9507] ? netlink_deliver_tap+0x24a/0xbe0 [ 93.104193][ T9507] ? __kasan_check_write+0x14/0x20 [ 93.109296][ T9507] netlink_unicast+0x58c/0x7d0 [ 93.114097][ T9507] ? netlink_attachskb+0x870/0x870 [ 93.119200][ T9507] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 93.124900][ T9507] ? __check_object_size+0x3d/0x437 [ 93.130094][ T9507] netlink_sendmsg+0x91c/0xea0 [ 93.134993][ T9507] ? netlink_unicast+0x7d0/0x7d0 [ 93.139914][ T9507] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 93.145459][ T9507] ? apparmor_socket_sendmsg+0x2a/0x30 [ 93.150898][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.157167][ T9507] ? security_socket_sendmsg+0x8d/0xc0 [ 93.162611][ T9507] ? netlink_unicast+0x7d0/0x7d0 [ 93.167639][ T9507] sock_sendmsg+0xd7/0x130 [ 93.172056][ T9507] ____sys_sendmsg+0x753/0x880 [ 93.176807][ T9507] ? kernel_sendmsg+0x50/0x50 [ 93.181466][ T9507] ? lockdep_init_map+0x1be/0x6d0 [ 93.186482][ T9507] ___sys_sendmsg+0x100/0x170 [ 93.191142][ T9507] ? sendmsg_copy_msghdr+0x70/0x70 [ 93.196242][ T9507] ? __kasan_check_read+0x11/0x20 [ 93.201254][ T9507] ? __lock_acquire+0x8a0/0x4a00 [ 93.206190][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.212416][ T9507] ? __this_cpu_preempt_check+0x35/0x190 [ 93.218035][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.224311][ T9507] ? percpu_counter_add_batch+0x13c/0x190 [ 93.230013][ T9507] ? __fd_install+0x1bc/0x640 [ 93.234676][ T9507] ? find_held_lock+0x35/0x130 [ 93.239415][ T9507] ? __fd_install+0x1bc/0x640 [ 93.244074][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.250300][ T9507] ? __fget_light+0x1a9/0x230 [ 93.254962][ T9507] ? __fdget+0x1b/0x20 [ 93.259050][ T9507] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 93.265374][ T9507] __sys_sendmsg+0x105/0x1d0 [ 93.269961][ T9507] ? __sys_sendmsg_sock+0xc0/0xc0 [ 93.274968][ T9507] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 93.280414][ T9507] ? do_syscall_64+0x26/0x790 [ 93.285082][ T9507] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.291132][ T9507] ? do_syscall_64+0x26/0x790 [ 93.295798][ T9507] __x64_sys_sendmsg+0x78/0xb0 [ 93.300549][ T9507] do_syscall_64+0xfa/0x790 [ 93.305043][ T9507] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.310915][ T9507] RIP: 0033:0x440559 [ 93.314972][ T9507] 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 [ 93.334796][ T9507] RSP: 002b:00007fff7e0d37f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 93.343197][ T9507] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 93.351156][ T9507] RDX: 0000000004000000 RSI: 000000002000d400 RDI: 0000000000000004 [ 93.359112][ T9507] RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 [ 93.367069][ T9507] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401de0 [ 93.375092][ T9507] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 93.383050][ T9507] Modules linked in: [ 93.387731][ T9507] ---[ end trace 61f5da841d800137 ]--- [ 93.393538][ T9507] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 93.399519][ T9507] Code: e8 5f 27 0e fb 41 83 fd 05 0f 87 62 05 00 00 e8 d0 25 0e fb 49 8d 7c 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a6 05 00 00 44 89 e9 be 01 00 [ 93.419164][ T9507] RSP: 0018:ffffc90006257100 EFLAGS: 00010206 [ 93.425253][ T9507] RAX: dffffc0000000000 RBX: ffffc900062572b0 RCX: ffffffff8666cfa1 [ 93.433248][ T9507] RDX: 0000000000000003 RSI: ffffffff8666cfb0 RDI: 0000000000000018 [ 93.441229][ T9507] RBP: ffffc900062571f0 R08: ffff88809329a640 R09: 0000000000000000 [ 93.449228][ T9507] R10: fffff52000c4ae2f R11: ffffc9000625717f R12: 0000000000000000 [ 93.457237][ T9507] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc900062571c8 [ 93.465266][ T9507] FS: 00000000022f6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 93.474286][ T9507] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.480898][ T9507] CR2: 0000000020000280 CR3: 00000000a6f40000 CR4: 00000000001406f0 [ 93.488855][ T9507] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.496871][ T9507] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.504915][ T9507] Kernel panic - not syncing: Fatal exception [ 93.512341][ T9507] Kernel Offset: disabled [ 93.516664][ T9507] Rebooting in 86400 seconds..