[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 81.259914][ T27] audit: type=1800 audit(1578416379.597:25): pid=9343 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.280891][ T27] audit: type=1800 audit(1578416379.607:26): pid=9343 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.339267][ T27] audit: type=1800 audit(1578416379.607:27): pid=9343 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 '10.128.0.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.966704][ T9500] netlink: 'syz-executor869': attribute type 3 has an invalid length. [ 91.975834][ T9500] netlink: 'syz-executor869': attribute type 3 has an invalid length. [ 91.984411][ T9500] netlink: 'syz-executor869': attribute type 2 has an invalid length. [ 91.992719][ T9500] netlink: 24 bytes leftover after parsing attributes in process `syz-executor869'. [ 92.002847][ T9500] kasan: CONFIG_KASAN_INLINE enabled [ 92.008486][ T9500] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 92.017128][ T9500] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 92.024097][ T9500] CPU: 0 PID: 9500 Comm: syz-executor869 Not tainted 5.5.0-rc5-syzkaller #0 [ 92.032747][ T9500] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.042888][ T9500] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 92.049299][ T9500] Code: 89 d8 48 c1 e8 03 42 0f b6 14 30 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a1 01 00 00 4c 89 e0 44 8b 3b 48 c1 e8 03 <42> 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 [ 92.068893][ T9500] RSP: 0018:ffffc90001d873d8 EFLAGS: 00010246 [ 92.074997][ T9500] RAX: 0000000000000000 RBX: ffffffff8a4cd73c RCX: ffffffff866323f9 [ 92.083114][ T9500] RDX: 0000000000000000 RSI: ffffffff866117e5 RDI: ffff8880a7e17680 [ 92.091072][ T9500] RBP: ffffc90001d87418 R08: ffff8880a85380c0 R09: ffff8880a7e17680 [ 92.099031][ T9500] R10: ffffed1014fc2ed7 R11: ffff8880a7e176bf R12: 0000000000000000 [ 92.106990][ T9500] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 92.114961][ T9500] FS: 0000000002356880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.123875][ T9500] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.130531][ T9500] CR2: 0000000020000200 CR3: 0000000097412000 CR4: 00000000001406f0 [ 92.138492][ T9500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.146456][ T9500] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.154407][ T9500] Call Trace: [ 92.157685][ T9500] ctnl_timeout_parse_policy+0x150/0x1d0 [ 92.163298][ T9500] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 92.169172][ T9500] cttimeout_default_set+0x150/0x1c0 [ 92.174434][ T9500] ? ctnl_timeout_parse_policy+0x1d0/0x1d0 [ 92.180235][ T9500] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 92.185386][ T9500] ? nfnetlink_bind+0x2c0/0x2c0 [ 92.190223][ T9500] ? __kasan_check_read+0x11/0x20 [ 92.195365][ T9500] ? __lock_acquire+0x8a0/0x4a00 [ 92.200330][ T9500] ? save_stack+0x5c/0x90 [ 92.204658][ T9500] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.210998][ T9500] ? apparmor_capable+0x497/0x900 [ 92.216198][ T9500] ? __kasan_check_read+0x11/0x20 [ 92.221645][ T9500] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 92.227270][ T9500] netlink_rcv_skb+0x177/0x450 [ 92.232029][ T9500] ? nfnetlink_bind+0x2c0/0x2c0 [ 92.236948][ T9500] ? netlink_ack+0xb50/0xb50 [ 92.241524][ T9500] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.247749][ T9500] ? ns_capable_common+0x93/0x100 [ 92.252758][ T9500] ? ns_capable+0x20/0x30 [ 92.258023][ T9500] ? __netlink_ns_capable+0x104/0x140 [ 92.263390][ T9500] nfnetlink_rcv+0x1ba/0x460 [ 92.267972][ T9500] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 92.273680][ T9500] ? netlink_deliver_tap+0x24a/0xbe0 [ 92.279001][ T9500] ? __kasan_check_write+0x14/0x20 [ 92.284139][ T9500] netlink_unicast+0x58c/0x7d0 [ 92.288891][ T9500] ? netlink_attachskb+0x870/0x870 [ 92.294071][ T9500] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 92.299829][ T9500] ? __check_object_size+0x3d/0x437 [ 92.305058][ T9500] netlink_sendmsg+0x91c/0xea0 [ 92.309810][ T9500] ? netlink_unicast+0x7d0/0x7d0 [ 92.314746][ T9500] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 92.320338][ T9500] ? apparmor_socket_sendmsg+0x2a/0x30 [ 92.325815][ T9500] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.332046][ T9500] ? security_socket_sendmsg+0x8d/0xc0 [ 92.337485][ T9500] ? netlink_unicast+0x7d0/0x7d0 [ 92.342405][ T9500] sock_sendmsg+0xd7/0x130 [ 92.346827][ T9500] ____sys_sendmsg+0x753/0x880 [ 92.351600][ T9500] ? kernel_sendmsg+0x50/0x50 [ 92.356271][ T9500] ? mark_held_locks+0xa4/0xf0 [ 92.361016][ T9500] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 92.367063][ T9500] ? __handle_mm_fault+0x3145/0x3cc0 [ 92.372345][ T9500] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 92.378411][ T9500] ___sys_sendmsg+0x100/0x170 [ 92.383066][ T9500] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 92.389286][ T9500] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.394394][ T9500] ? __do_page_fault+0x56a/0xd80 [ 92.399658][ T9500] ? find_held_lock+0x35/0x130 [ 92.404420][ T9500] ? __do_page_fault+0x56a/0xd80 [ 92.409358][ T9500] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.415577][ T9500] ? __fget_light+0x1a9/0x230 [ 92.420247][ T9500] ? __fdget+0x1b/0x20 [ 92.424296][ T9500] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.430522][ T9500] __sys_sendmsg+0x105/0x1d0 [ 92.435110][ T9500] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.440114][ T9500] ? down_read_non_owner+0x490/0x490 [ 92.445396][ T9500] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.450835][ T9500] ? do_syscall_64+0x26/0x790 [ 92.455492][ T9500] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.461545][ T9500] ? do_syscall_64+0x26/0x790 [ 92.466204][ T9500] __x64_sys_sendmsg+0x78/0xb0 [ 92.470954][ T9500] do_syscall_64+0xfa/0x790 [ 92.475445][ T9500] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.481327][ T9500] RIP: 0033:0x4401e9 [ 92.485200][ T9500] 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 [ 92.504797][ T9500] RSP: 002b:00007ffe8e7122f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 92.513198][ T9500] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 92.521218][ T9500] RDX: 0000000000000940 RSI: 0000000020000200 RDI: 0000000000000003 [ 92.529181][ T9500] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 92.537379][ T9500] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 92.545337][ T9500] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 92.553301][ T9500] Modules linked in: [ 92.558056][ T9500] ---[ end trace 937b7efd5fe11d1d ]--- [ 92.563644][ T9500] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 92.570215][ T9500] Code: 89 d8 48 c1 e8 03 42 0f b6 14 30 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a1 01 00 00 4c 89 e0 44 8b 3b 48 c1 e8 03 <42> 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 [ 92.590013][ T9500] RSP: 0018:ffffc90001d873d8 EFLAGS: 00010246 [ 92.596115][ T9500] RAX: 0000000000000000 RBX: ffffffff8a4cd73c RCX: ffffffff866323f9 [ 92.604245][ T9500] RDX: 0000000000000000 RSI: ffffffff866117e5 RDI: ffff8880a7e17680 [ 92.612351][ T9500] RBP: ffffc90001d87418 R08: ffff8880a85380c0 R09: ffff8880a7e17680 [ 92.620348][ T9500] R10: ffffed1014fc2ed7 R11: ffff8880a7e176bf R12: 0000000000000000 [ 92.628383][ T9500] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 92.636456][ T9500] FS: 0000000002356880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.645411][ T9500] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.652059][ T9500] CR2: 0000000020000200 CR3: 0000000097412000 CR4: 00000000001406f0 [ 92.660031][ T9500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.668043][ T9500] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.676116][ T9500] Kernel panic - not syncing: Fatal exception [ 92.683903][ T9500] Kernel Offset: disabled [ 92.688243][ T9500] Rebooting in 86400 seconds..