[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.228457][ T27] audit: type=1800 audit(1578435398.005:25): pid=9354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.255421][ T27] audit: type=1800 audit(1578435398.005:26): pid=9354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.295477][ T27] audit: type=1800 audit(1578435398.015:27): pid=9354 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 '10.128.0.61' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.356338][ T9507] kasan: CONFIG_KASAN_INLINE enabled [ 91.361731][ T9507] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 91.370051][ T9507] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 91.376985][ T9507] CPU: 0 PID: 9507 Comm: syz-executor675 Not tainted 5.5.0-rc4-syzkaller #0 [ 91.385635][ T9507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.395699][ T9507] RIP: 0010:hash_ip4_uadt+0x1f5/0x7a0 [ 91.403225][ T9507] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 10 05 00 00 48 89 da 45 8b 7f 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ec [ 91.422894][ T9507] RSP: 0018:ffffc90001ec7190 EFLAGS: 00010246 [ 91.428936][ T9507] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 91.436885][ T9507] RDX: 0000000000000000 RSI: ffffffff86793b82 RDI: ffff888091ab98f4 [ 91.444833][ T9507] RBP: ffffc90001ec72b8 R08: 0000000000000000 R09: 0000000000000000 [ 91.452878][ T9507] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a4b87b00 [ 91.460825][ T9507] R13: ffffc90001ec7320 R14: 0000000000000002 R15: 000000009b000000 [ 91.468775][ T9507] FS: 0000000000e7e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 91.477688][ T9507] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.484247][ T9507] CR2: 0000000020000446 CR3: 000000008e30e000 CR4: 00000000001406f0 [ 91.492198][ T9507] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.500150][ T9507] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.508109][ T9507] Call Trace: [ 91.511387][ T9507] ? hash_ip6_test+0x670/0x670 [ 91.516145][ T9507] ? hash_ip6_uadt+0x670/0x670 [ 91.520910][ T9507] ? nla_memcpy+0xb0/0xb0 [ 91.525239][ T9507] ? ip_set_utest+0x4aa/0x890 [ 91.529893][ T9507] ? __kasan_check_read+0x11/0x20 [ 91.534893][ T9507] ip_set_utest+0x55b/0x890 [ 91.539374][ T9507] ? ip_set_put_byindex+0x490/0x490 [ 91.544563][ T9507] ? __mutex_lock+0x458/0x13c0 [ 91.549330][ T9507] ? ip_set_put_byindex+0x490/0x490 [ 91.554517][ T9507] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 91.559444][ T9507] ? nfnetlink_bind+0x2c0/0x2c0 [ 91.564288][ T9507] ? __kasan_check_read+0x11/0x20 [ 91.569295][ T9507] ? __lock_acquire+0x8a0/0x4a00 [ 91.574214][ T9507] ? save_stack+0x5c/0x90 [ 91.578527][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.584753][ T9507] ? apparmor_capable+0x497/0x900 [ 91.589765][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.595991][ T9507] ? __kasan_check_read+0x11/0x20 [ 91.601011][ T9507] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 91.606459][ T9507] netlink_rcv_skb+0x177/0x450 [ 91.611201][ T9507] ? nfnetlink_bind+0x2c0/0x2c0 [ 91.616043][ T9507] ? netlink_ack+0xb50/0xb50 [ 91.620611][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.626828][ T9507] ? ns_capable_common+0x93/0x100 [ 91.631836][ T9507] ? ns_capable+0x20/0x30 [ 91.636143][ T9507] ? __netlink_ns_capable+0x104/0x140 [ 91.641494][ T9507] nfnetlink_rcv+0x1ba/0x460 [ 91.646084][ T9507] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 91.651537][ T9507] ? netlink_deliver_tap+0x24a/0xbe0 [ 91.658448][ T9507] ? __kasan_check_write+0x14/0x20 [ 91.664144][ T9507] netlink_unicast+0x58c/0x7d0 [ 91.668899][ T9507] ? netlink_attachskb+0x870/0x870 [ 91.673987][ T9507] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 91.679701][ T9507] ? __check_object_size+0x3d/0x437 [ 91.684963][ T9507] netlink_sendmsg+0x91c/0xea0 [ 91.689708][ T9507] ? netlink_unicast+0x7d0/0x7d0 [ 91.694622][ T9507] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 91.700153][ T9507] ? apparmor_socket_sendmsg+0x2a/0x30 [ 91.705588][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.711806][ T9507] ? security_socket_sendmsg+0x8d/0xc0 [ 91.717243][ T9507] ? netlink_unicast+0x7d0/0x7d0 [ 91.722156][ T9507] sock_sendmsg+0xd7/0x130 [ 91.726549][ T9507] ____sys_sendmsg+0x753/0x880 [ 91.731291][ T9507] ? kernel_sendmsg+0x50/0x50 [ 91.735954][ T9507] ? lockdep_init_map+0x1be/0x6d0 [ 91.740957][ T9507] ___sys_sendmsg+0x100/0x170 [ 91.745610][ T9507] ? sendmsg_copy_msghdr+0x70/0x70 [ 91.750698][ T9507] ? __kasan_check_read+0x11/0x20 [ 91.755700][ T9507] ? __lock_acquire+0x8a0/0x4a00 [ 91.760616][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.766845][ T9507] ? __this_cpu_preempt_check+0x35/0x190 [ 91.772452][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.778672][ T9507] ? percpu_counter_add_batch+0x13c/0x190 [ 91.784366][ T9507] ? __fd_install+0x1bc/0x640 [ 91.789033][ T9507] ? find_held_lock+0x35/0x130 [ 91.793818][ T9507] ? __fd_install+0x1bc/0x640 [ 91.798652][ T9507] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 91.804872][ T9507] ? __fget_light+0x1a9/0x230 [ 91.809540][ T9507] ? __fdget+0x1b/0x20 [ 91.813614][ T9507] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 91.819844][ T9507] __sys_sendmsg+0x105/0x1d0 [ 91.824428][ T9507] ? __sys_sendmsg_sock+0xc0/0xc0 [ 91.829627][ T9507] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 91.835245][ T9507] ? do_syscall_64+0x26/0x790 [ 91.839916][ T9507] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.845978][ T9507] ? do_syscall_64+0x26/0x790 [ 91.850644][ T9507] __x64_sys_sendmsg+0x78/0xb0 [ 91.855494][ T9507] do_syscall_64+0xfa/0x790 [ 91.859973][ T9507] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 91.865838][ T9507] RIP: 0033:0x440af9 [ 91.869714][ 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 [ 91.890347][ T9507] RSP: 002b:00007ffe6e1212b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 91.898922][ T9507] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440af9 [ 91.906875][ T9507] RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000005 [ 91.915007][ T9507] RBP: 00000000006cb018 R08: 0000000000000014 R09: 00000000004002c8 [ 91.922979][ T9507] R10: 0000000000000018 R11: 0000000000000246 R12: 0000000000402380 [ 91.930955][ T9507] R13: 0000000000402410 R14: 0000000000000000 R15: 0000000000000000 [ 91.941123][ T9507] Modules linked in: [ 91.945056][ T9507] ---[ end trace 3e5ca24b710cd584 ]--- [ 91.950645][ T9507] RIP: 0010:hash_ip4_uadt+0x1f5/0x7a0 [ 91.956255][ T9507] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 10 05 00 00 48 89 da 45 8b 7f 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 ec [ 91.976644][ T9507] RSP: 0018:ffffc90001ec7190 EFLAGS: 00010246 [ 91.982702][ T9507] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 91.990709][ T9507] RDX: 0000000000000000 RSI: ffffffff86793b82 RDI: ffff888091ab98f4 [ 91.998915][ T9507] RBP: ffffc90001ec72b8 R08: 0000000000000000 R09: 0000000000000000 [ 92.006920][ T9507] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a4b87b00 [ 92.014992][ T9507] R13: ffffc90001ec7320 R14: 0000000000000002 R15: 000000009b000000 [ 92.023088][ T9507] FS: 0000000000e7e880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.032124][ T9507] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.038740][ T9507] CR2: 0000000020000446 CR3: 000000008e30e000 CR4: 00000000001406f0 [ 92.047079][ T9507] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.055120][ T9507] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.064319][ T9507] Kernel panic - not syncing: Fatal exception in interrupt [ 92.073130][ T9507] Kernel Offset: disabled [ 92.077587][ T9507] Rebooting in 86400 seconds..