[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 87.413699][ T25] audit: type=1800 audit(1579199729.470:25): pid=9244 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 87.438441][ T25] audit: type=1800 audit(1579199729.470:26): pid=9244 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 87.482130][ T25] audit: type=1800 audit(1579199729.470:27): pid=9244 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 '10.128.0.38' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 114.830808][ T9398] kasan: CONFIG_KASAN_INLINE enabled [ 114.836188][ T9398] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 114.844338][ T9398] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 114.851267][ T9398] CPU: 0 PID: 9398 Comm: syz-executor747 Not tainted 5.5.0-rc5-syzkaller #0 [ 114.859912][ T9398] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.869953][ T9398] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 114.875932][ T9398] Code: e8 7f ae 09 fb 41 83 fd 05 0f 87 62 05 00 00 e8 f0 ac 09 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 [ 114.895525][ T9398] RSP: 0018:ffffc90001ff7100 EFLAGS: 00010206 [ 114.901722][ T9398] RAX: dffffc0000000000 RBX: ffffc90001ff72b0 RCX: ffffffff866b5341 [ 114.909679][ T9398] RDX: 0000000000000003 RSI: ffffffff866b5350 RDI: 0000000000000018 [ 114.917629][ T9398] RBP: ffffc90001ff71f0 R08: ffff88809fbb0400 R09: 0000000000000000 [ 114.925577][ T9398] R10: fffff520003fee2f R11: ffffc90001ff717f R12: 0000000000000000 [ 114.933528][ T9398] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90001ff71c8 [ 114.941532][ T9398] FS: 00000000024f4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 114.950436][ T9398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 114.957039][ T9398] CR2: 0000000020000280 CR3: 0000000095b85000 CR4: 00000000001406f0 [ 114.965004][ T9398] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 114.973000][ T9398] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 114.980948][ T9398] Call Trace: [ 114.984269][ T9398] ? nf_tables_newset+0x2620/0x2620 [ 114.989448][ T9398] ? nft_trans_rule_add+0x2d0/0x2d0 [ 114.994623][ T9398] ? __kasan_check_read+0x11/0x20 [ 114.999624][ T9398] nf_tables_addchain.constprop.0+0x1c1/0x1520 [ 115.005766][ T9398] ? nft_chain_parse_hook+0xa10/0xa10 [ 115.011118][ T9398] ? nla_strcmp+0xe3/0x120 [ 115.015512][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.021786][ T9398] ? nft_table_lookup+0x154/0x1b0 [ 115.026811][ T9398] nf_tables_newchain+0x1033/0x1820 [ 115.032039][ T9398] ? __mutex_lock+0x458/0x13c0 [ 115.036801][ T9398] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 115.043195][ T9398] ? nla_memcpy+0xb0/0xb0 [ 115.047513][ T9398] ? __nla_parse+0x43/0x60 [ 115.051912][ T9398] nfnetlink_rcv_batch+0xf42/0x17a0 [ 115.057093][ T9398] ? nf_tables_addchain.constprop.0+0x1520/0x1520 [ 115.063484][ T9398] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 115.069269][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.075483][ T9398] ? apparmor_capable+0x497/0x900 [ 115.080488][ T9398] ? __nla_validate_parse+0x2d0/0x1ee0 [ 115.085924][ T9398] ? cap_capable+0x205/0x270 [ 115.090493][ T9398] ? nla_memcpy+0xb0/0xb0 [ 115.094805][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.101020][ T9398] ? ns_capable_common+0x93/0x100 [ 115.106150][ T9398] ? __nla_parse+0x43/0x60 [ 115.110578][ T9398] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 115.116402][ T9398] nfnetlink_rcv+0x3e7/0x460 [ 115.120968][ T9398] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 115.126401][ T9398] ? netlink_deliver_tap+0x24a/0xbf0 [ 115.131662][ T9398] ? __kasan_check_write+0x14/0x20 [ 115.136777][ T9398] netlink_unicast+0x59e/0x7e0 [ 115.141583][ T9398] ? netlink_attachskb+0x870/0x870 [ 115.146680][ T9398] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 115.152379][ T9398] ? __check_object_size+0x3d/0x437 [ 115.157556][ T9398] netlink_sendmsg+0x91c/0xea0 [ 115.162297][ T9398] ? netlink_unicast+0x7e0/0x7e0 [ 115.167235][ T9398] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 115.172753][ T9398] ? apparmor_socket_sendmsg+0x2a/0x30 [ 115.178187][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.184401][ T9398] ? security_socket_sendmsg+0x8d/0xc0 [ 115.189834][ T9398] ? netlink_unicast+0x7e0/0x7e0 [ 115.194748][ T9398] sock_sendmsg+0xd7/0x130 [ 115.199142][ T9398] ____sys_sendmsg+0x753/0x880 [ 115.203951][ T9398] ? kernel_sendmsg+0x50/0x50 [ 115.208630][ T9398] ? lockdep_init_map+0x1be/0x6d0 [ 115.213648][ T9398] ___sys_sendmsg+0x100/0x170 [ 115.218309][ T9398] ? sendmsg_copy_msghdr+0x70/0x70 [ 115.223500][ T9398] ? __kasan_check_read+0x11/0x20 [ 115.228511][ T9398] ? __lock_acquire+0x8a0/0x4a00 [ 115.233425][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.239644][ T9398] ? __this_cpu_preempt_check+0x35/0x190 [ 115.245255][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.251470][ T9398] ? percpu_counter_add_batch+0x13c/0x190 [ 115.257166][ T9398] ? __fd_install+0x1bc/0x640 [ 115.261832][ T9398] ? find_held_lock+0x35/0x130 [ 115.266569][ T9398] ? __fd_install+0x1bc/0x640 [ 115.271225][ T9398] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 115.277490][ T9398] ? __fget_light+0x1a9/0x230 [ 115.282154][ T9398] ? __fdget+0x1b/0x20 [ 115.286251][ T9398] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 115.292489][ T9398] __sys_sendmsg+0x105/0x1d0 [ 115.297058][ T9398] ? __sys_sendmsg_sock+0xc0/0xc0 [ 115.302065][ T9398] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 115.307498][ T9398] ? do_syscall_64+0x26/0x790 [ 115.312151][ T9398] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 115.318192][ T9398] ? do_syscall_64+0x26/0x790 [ 115.322842][ T9398] __x64_sys_sendmsg+0x78/0xb0 [ 115.327579][ T9398] do_syscall_64+0xfa/0x790 [ 115.332058][ T9398] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 115.337921][ T9398] RIP: 0033:0x440559 [ 115.341790][ T9398] 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 [ 115.361366][ T9398] RSP: 002b:00007ffe7b410938 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 115.369872][ T9398] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440559 [ 115.377818][ T9398] RDX: 0000000004000000 RSI: 000000002000d400 RDI: 0000000000000004 [ 115.385761][ T9398] RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 [ 115.393706][ T9398] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401de0 [ 115.401655][ T9398] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 115.409619][ T9398] Modules linked in: [ 115.413982][ T9398] ---[ end trace 03a73905d8fc6c27 ]--- [ 115.419495][ T9398] RIP: 0010:nft_chain_parse_hook+0x386/0xa10 [ 115.425469][ T9398] Code: e8 7f ae 09 fb 41 83 fd 05 0f 87 62 05 00 00 e8 f0 ac 09 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 [ 115.445221][ T9398] RSP: 0018:ffffc90001ff7100 EFLAGS: 00010206 [ 115.451293][ T9398] RAX: dffffc0000000000 RBX: ffffc90001ff72b0 RCX: ffffffff866b5341 [ 115.459306][ T9398] RDX: 0000000000000003 RSI: ffffffff866b5350 RDI: 0000000000000018 [ 115.467307][ T9398] RBP: ffffc90001ff71f0 R08: ffff88809fbb0400 R09: 0000000000000000 [ 115.475264][ T9398] R10: fffff520003fee2f R11: ffffc90001ff717f R12: 0000000000000000 [ 115.483263][ T9398] R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90001ff71c8 [ 115.491247][ T9398] FS: 00000000024f4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 115.500188][ T9398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 115.506802][ T9398] CR2: 0000000020000280 CR3: 0000000095b85000 CR4: 00000000001406f0 [ 115.514770][ T9398] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 115.522778][ T9398] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 115.530775][ T9398] Kernel panic - not syncing: Fatal exception [ 115.537926][ T9398] Kernel Offset: disabled [ 115.542247][ T9398] Rebooting in 86400 seconds..