[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.511051][ T27] audit: type=1800 audit(1578338046.069:25): pid=9370 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.530986][ T27] audit: type=1800 audit(1578338046.069:26): pid=9370 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.582958][ T27] audit: type=1800 audit(1578338046.079:27): pid=9370 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 '10.128.1.0' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.299792][ T9522] netlink: 'syz-executor813': attribute type 3 has an invalid length. [ 83.308396][ T9522] netlink: 'syz-executor813': attribute type 3 has an invalid length. [ 83.316613][ T9522] netlink: 'syz-executor813': attribute type 2 has an invalid length. [ 83.324964][ T9522] netlink: 24 bytes leftover after parsing attributes in process `syz-executor813'. [ 83.334455][ T9522] kasan: CONFIG_KASAN_INLINE enabled [ 83.339939][ T9522] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 83.349172][ T9522] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 83.356120][ T9522] CPU: 0 PID: 9522 Comm: syz-executor813 Not tainted 5.5.0-rc4-syzkaller #0 [ 83.364856][ T9522] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.374910][ T9522] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 83.381361][ T9522] 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 [ 83.401387][ T9522] RSP: 0018:ffffc90001fd73d8 EFLAGS: 00010246 [ 83.407629][ T9522] RAX: 0000000000000000 RBX: ffffffff8a4cd6fc RCX: ffffffff866323e9 [ 83.416887][ T9522] RDX: 0000000000000000 RSI: ffffffff866117d5 RDI: ffff888098c2cf00 [ 83.424855][ T9522] RBP: ffffc90001fd7418 R08: ffff88809f51c280 R09: ffff888098c2cf00 [ 83.432817][ T9522] R10: ffffed10131859e7 R11: ffff888098c2cf3f R12: 0000000000000000 [ 83.440779][ T9522] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 83.448742][ T9522] FS: 00000000022f4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 83.458862][ T9522] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.465425][ T9522] CR2: 0000000020000200 CR3: 00000000a6a68000 CR4: 00000000001406f0 [ 83.473388][ T9522] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.481633][ T9522] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.489620][ T9522] Call Trace: [ 83.492914][ T9522] ctnl_timeout_parse_policy+0x150/0x1d0 [ 83.498545][ T9522] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 83.504518][ T9522] cttimeout_default_set+0x150/0x1c0 [ 83.509806][ T9522] ? ctnl_timeout_parse_policy+0x1d0/0x1d0 [ 83.515700][ T9522] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 83.520628][ T9522] ? nfnetlink_bind+0x2c0/0x2c0 [ 83.525464][ T9522] ? __kasan_check_read+0x11/0x20 [ 83.530470][ T9522] ? __lock_acquire+0x8a0/0x4a00 [ 83.535400][ T9522] ? save_stack+0x5c/0x90 [ 83.539729][ T9522] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.546031][ T9522] ? apparmor_capable+0x497/0x900 [ 83.551043][ T9522] ? __kasan_check_read+0x11/0x20 [ 83.556185][ T9522] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 83.561750][ T9522] netlink_rcv_skb+0x177/0x450 [ 83.566584][ T9522] ? nfnetlink_bind+0x2c0/0x2c0 [ 83.571445][ T9522] ? netlink_ack+0xb50/0xb50 [ 83.576029][ T9522] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.582270][ T9522] ? ns_capable_common+0x93/0x100 [ 83.587294][ T9522] ? ns_capable+0x20/0x30 [ 83.591704][ T9522] ? __netlink_ns_capable+0x104/0x140 [ 83.597057][ T9522] nfnetlink_rcv+0x1ba/0x460 [ 83.601729][ T9522] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 83.607187][ T9522] ? netlink_deliver_tap+0x24a/0xbe0 [ 83.612459][ T9522] ? __kasan_check_write+0x14/0x20 [ 83.617546][ T9522] netlink_unicast+0x58c/0x7d0 [ 83.622290][ T9522] ? netlink_attachskb+0x870/0x870 [ 83.627385][ T9522] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 83.633196][ T9522] ? __check_object_size+0x3d/0x437 [ 83.638380][ T9522] netlink_sendmsg+0x91c/0xea0 [ 83.643138][ T9522] ? netlink_unicast+0x7d0/0x7d0 [ 83.648089][ T9522] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 83.653623][ T9522] ? apparmor_socket_sendmsg+0x2a/0x30 [ 83.659098][ T9522] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.665381][ T9522] ? security_socket_sendmsg+0x8d/0xc0 [ 83.670823][ T9522] ? netlink_unicast+0x7d0/0x7d0 [ 83.675761][ T9522] sock_sendmsg+0xd7/0x130 [ 83.680524][ T9522] ____sys_sendmsg+0x753/0x880 [ 83.685276][ T9522] ? kernel_sendmsg+0x50/0x50 [ 83.689954][ T9522] ? mark_held_locks+0xa4/0xf0 [ 83.694706][ T9522] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 83.700759][ T9522] ? __handle_mm_fault+0x3145/0x3cc0 [ 83.706021][ T9522] ? do_huge_pmd_anonymous_page+0x1463/0x1a50 [ 83.712067][ T9522] ___sys_sendmsg+0x100/0x170 [ 83.717008][ T9522] ? do_huge_pmd_anonymous_page+0xceb/0x1a50 [ 83.723072][ T9522] ? sendmsg_copy_msghdr+0x70/0x70 [ 83.728164][ T9522] ? __do_page_fault+0x56a/0xd80 [ 83.733077][ T9522] ? find_held_lock+0x35/0x130 [ 83.737836][ T9522] ? __do_page_fault+0x56a/0xd80 [ 83.742773][ T9522] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.749077][ T9522] ? __fget_light+0x1a9/0x230 [ 83.753733][ T9522] ? __fdget+0x1b/0x20 [ 83.757779][ T9522] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.763998][ T9522] __sys_sendmsg+0x105/0x1d0 [ 83.768566][ T9522] ? __sys_sendmsg_sock+0xc0/0xc0 [ 83.773577][ T9522] ? down_read_non_owner+0x490/0x490 [ 83.778930][ T9522] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 83.784388][ T9522] ? do_syscall_64+0x26/0x790 [ 83.790019][ T9522] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.796074][ T9522] ? do_syscall_64+0x26/0x790 [ 83.800739][ T9522] __x64_sys_sendmsg+0x78/0xb0 [ 83.805491][ T9522] do_syscall_64+0xfa/0x790 [ 83.809982][ T9522] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.815871][ T9522] RIP: 0033:0x4401e9 [ 83.819745][ T9522] 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 [ 83.839344][ T9522] RSP: 002b:00007ffe699346c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 83.847752][ T9522] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401e9 [ 83.855802][ T9522] RDX: 0000000000000940 RSI: 0000000020000200 RDI: 0000000000000003 [ 83.863767][ T9522] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 83.871763][ T9522] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a70 [ 83.879739][ T9522] R13: 0000000000401b00 R14: 0000000000000000 R15: 0000000000000000 [ 83.887718][ T9522] Modules linked in: [ 83.892682][ T9522] ---[ end trace 0b60d1e6ef381959 ]--- [ 83.898181][ T9522] RIP: 0010:dccp_timeout_nlattr_to_obj+0x60/0x230 [ 83.905095][ T9522] 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 [ 83.924735][ T9522] RSP: 0018:ffffc90001fd73d8 EFLAGS: 00010246 [ 83.930830][ T9522] RAX: 0000000000000000 RBX: ffffffff8a4cd6fc RCX: ffffffff866323e9 [ 83.938792][ T9522] RDX: 0000000000000000 RSI: ffffffff866117d5 RDI: ffff888098c2cf00 [ 83.946787][ T9522] RBP: ffffc90001fd7418 R08: ffff88809f51c280 R09: ffff888098c2cf00 [ 83.954862][ T9522] R10: ffffed10131859e7 R11: ffff888098c2cf3f R12: 0000000000000000 [ 83.963247][ T9522] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000005dc0 [ 83.971751][ T9522] FS: 00000000022f4880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 83.980693][ T9522] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.987281][ T9522] CR2: ffffffffff600400 CR3: 00000000a6a68000 CR4: 00000000001406f0 [ 83.995277][ T9522] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 84.003275][ T9522] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 84.011616][ T9522] Kernel panic - not syncing: Fatal exception [ 84.019002][ T9522] Kernel Offset: disabled [ 84.023350][ T9522] Rebooting in 86400 seconds..