[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 81.002907][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 81.002920][ T27] audit: type=1800 audit(1580319958.782:29): pid=9925 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 81.030311][ T27] audit: type=1800 audit(1580319958.782:30): pid=9925 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.124' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 97.785897][T10077] general protection fault, probably for non-canonical address 0xdffffc00060e8d2f: 0000 [#1] PREEMPT SMP KASAN [ 97.798755][T10077] KASAN: probably user-memory-access in range [0x0000000030746978-0x000000003074697f] [ 97.808652][T10077] CPU: 1 PID: 10077 Comm: syz-executor561 Not tainted 5.5.0-syzkaller #0 [ 97.817732][T10077] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.828942][T10077] RIP: 0010:nf_flow_table_offload_setup+0x4dc/0x6d0 [ 97.835789][T10077] Code: bc 24 50 ff ff ff 48 ba 00 00 00 00 00 fc ff df 4d 8b ae 00 02 00 00 4d 8b a4 24 58 ff ff ff 49 8d 7f 08 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 cd 01 00 00 4c 89 e2 49 89 47 08 48 b8 00 00 00 [ 97.856655][T10077] RSP: 0018:ffffc90002097228 EFLAGS: 00010202 [ 97.863664][T10077] RAX: ffff8880a9427a50 RBX: 1ffff92000412e49 RCX: 00000000060e8d2f [ 97.876465][T10077] RDX: dffffc0000000000 RSI: ffffffff867501ce RDI: 000000003074697b [ 97.886057][T10077] RBP: ffffc90002097370 R08: ffff88808e2fc100 R09: fffff52000412e55 [ 97.894975][T10077] R10: fffff52000412e54 R11: ffffc900020972a6 R12: 0000000000000000 [ 97.904956][T10077] R13: ffff8880a9427a50 R14: ffff8880a9427850 R15: 0000000030746973 [ 97.913518][T10077] FS: 0000000000abb880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 97.924176][T10077] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.931750][T10077] CR2: 0000000020003e00 CR3: 000000009214d000 CR4: 00000000001406e0 [ 97.940772][T10077] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.950584][T10077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.959527][T10077] Call Trace: [ 97.963384][T10077] ? flow_offload_queue_work+0x130/0x130 [ 97.969591][T10077] ? nft_netdev_hook_alloc+0xfb/0x170 [ 97.975608][T10077] ? nf_tables_init_net+0x1e0/0x1e0 [ 97.981160][T10077] ? nla_memcpy+0xb0/0xb0 [ 97.985499][T10077] ? wait_for_completion+0x440/0x440 [ 97.991779][T10077] ? trace_hardirqs_on+0x67/0x240 [ 98.001677][T10077] ? nf_tables_parse_netdev_hooks+0x70/0x660 [ 98.008086][T10077] nf_tables_newflowtable+0x1352/0x1d90 [ 98.014669][T10077] ? nf_tables_newrule+0x2400/0x2400 [ 98.035780][T10077] ? __nla_parse+0x43/0x60 [ 98.040793][T10077] nfnetlink_rcv_batch+0x8c8/0x1790 [ 98.046405][T10077] ? nf_tables_newrule+0x2400/0x2400 [ 98.052604][T10077] ? nfnetlink_subsys_register+0x2b0/0x2b0 [ 98.059636][T10077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.065885][T10077] ? apparmor_capable+0x497/0x900 [ 98.070928][T10077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.080574][T10077] ? __nla_validate_parse+0x2d0/0x1ee0 [ 98.086363][T10077] ? cap_capable+0x205/0x270 [ 98.091187][T10077] ? nla_memcpy+0xb0/0xb0 [ 98.096388][T10077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.103829][T10077] ? ns_capable_common+0x93/0x100 [ 98.109195][T10077] ? __nla_parse+0x43/0x60 [ 98.114170][T10077] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 98.126886][T10077] nfnetlink_rcv+0x3e7/0x460 [ 98.131927][T10077] ? nfnetlink_rcv_batch+0x1790/0x1790 [ 98.137571][T10077] ? netlink_deliver_tap+0x248/0xbf0 [ 98.144412][T10077] ? __kasan_check_write+0x14/0x20 [ 98.150884][T10077] netlink_unicast+0x59e/0x7e0 [ 98.157194][T10077] ? netlink_attachskb+0x870/0x870 [ 98.163289][T10077] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 98.169597][T10077] ? __check_object_size+0x3d/0x437 [ 98.176670][T10077] netlink_sendmsg+0x91c/0xea0 [ 98.182416][T10077] ? netlink_unicast+0x7e0/0x7e0 [ 98.187916][T10077] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 98.193771][T10077] ? apparmor_socket_sendmsg+0x2a/0x30 [ 98.199655][T10077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.206300][T10077] ? security_socket_sendmsg+0x8d/0xc0 [ 98.212904][T10077] ? netlink_unicast+0x7e0/0x7e0 [ 98.218536][T10077] sock_sendmsg+0xd7/0x130 [ 98.223404][T10077] ____sys_sendmsg+0x753/0x880 [ 98.228560][T10077] ? kernel_sendmsg+0x50/0x50 [ 98.233626][T10077] ___sys_sendmsg+0x100/0x170 [ 98.238916][T10077] ? sendmsg_copy_msghdr+0x70/0x70 [ 98.244545][T10077] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 98.251006][T10077] ? prep_transhuge_page+0xa0/0xa0 [ 98.256626][T10077] ? do_page_fault+0x579/0x12e1 [ 98.261666][T10077] ? find_held_lock+0x35/0x130 [ 98.267494][T10077] ? do_page_fault+0x579/0x12e1 [ 98.272387][T10077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 98.279625][T10077] ? __fget_light+0x1a9/0x230 [ 98.284667][T10077] ? __fdget+0x1b/0x20 [ 98.288765][T10077] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 98.295183][T10077] __sys_sendmsg+0x105/0x1d0 [ 98.300321][T10077] ? __sys_sendmsg_sock+0xc0/0xc0 [ 98.306068][T10077] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 98.311653][T10077] ? do_syscall_64+0x26/0x790 [ 98.317089][T10077] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.323276][T10077] ? do_syscall_64+0x26/0x790 [ 98.328169][T10077] __x64_sys_sendmsg+0x78/0xb0 [ 98.333455][T10077] do_syscall_64+0xfa/0x790 [ 98.338333][T10077] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 98.344562][T10077] RIP: 0033:0x4401b9 [ 98.348731][T10077] 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 [ 98.369518][T10077] RSP: 002b:00007ffe4f8c8728 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 98.378552][T10077] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401b9 [ 98.387706][T10077] RDX: 0000000000000000 RSI: 0000000020003e00 RDI: 0000000000000003 [ 98.395985][T10077] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 98.404444][T10077] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a40 [ 98.413953][T10077] R13: 0000000000401ad0 R14: 0000000000000000 R15: 0000000000000000 [ 98.422192][T10077] Modules linked in: [ 98.427496][T10077] ---[ end trace c20bf71f4e49d200 ]--- [ 98.433846][T10077] RIP: 0010:nf_flow_table_offload_setup+0x4dc/0x6d0 [ 98.441001][T10077] Code: bc 24 50 ff ff ff 48 ba 00 00 00 00 00 fc ff df 4d 8b ae 00 02 00 00 4d 8b a4 24 58 ff ff ff 49 8d 7f 08 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 cd 01 00 00 4c 89 e2 49 89 47 08 48 b8 00 00 00 [ 98.462328][T10077] RSP: 0018:ffffc90002097228 EFLAGS: 00010202 [ 98.468925][T10077] RAX: ffff8880a9427a50 RBX: 1ffff92000412e49 RCX: 00000000060e8d2f [ 98.477318][T10077] RDX: dffffc0000000000 RSI: ffffffff867501ce RDI: 000000003074697b [ 98.486072][T10077] RBP: ffffc90002097370 R08: ffff88808e2fc100 R09: fffff52000412e55 [ 98.494268][T10077] R10: fffff52000412e54 R11: ffffc900020972a6 R12: 0000000000000000 [ 98.502535][T10077] R13: ffff8880a9427a50 R14: ffff8880a9427850 R15: 0000000030746973 [ 98.510673][T10077] FS: 0000000000abb880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 98.520031][T10077] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 98.527350][T10077] CR2: 000055e823780120 CR3: 000000009214d000 CR4: 00000000001406f0 [ 98.535676][T10077] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 98.544265][T10077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 98.552327][T10077] Kernel panic - not syncing: Fatal exception [ 98.560555][T10077] Kernel Offset: disabled [ 98.565082][T10077] Rebooting in 86400 seconds..