[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 74.423681][ T27] audit: type=1800 audit(1578484557.614:25): pid=9311 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.445789][ T27] audit: type=1800 audit(1578484557.614:26): pid=9311 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.514152][ T27] audit: type=1800 audit(1578484557.614:27): pid=9311 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 '10.128.0.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 82.766129][ T9463] kasan: CONFIG_KASAN_INLINE enabled [ 82.771710][ T9463] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 82.779825][ T9463] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 82.786761][ T9463] CPU: 1 PID: 9463 Comm: syz-executor287 Not tainted 5.5.0-rc5-syzkaller #0 [ 82.795511][ T9463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 82.805653][ T9463] RIP: 0010:hash_ip4_uadt+0x1f5/0x7a0 [ 82.811010][ T9463] 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 [ 82.830593][ T9463] RSP: 0018:ffffc90001d97190 EFLAGS: 00010246 [ 82.836635][ T9463] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 82.844597][ T9463] RDX: 0000000000000000 RSI: ffffffff86790b92 RDI: ffff8880a913c030 [ 82.852570][ T9463] RBP: ffffc90001d972b8 R08: 0000000000000000 R09: 0000000000000000 [ 82.860526][ T9463] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a65d5a00 [ 82.868484][ T9463] R13: ffffc90001d97320 R14: 0000000000000002 R15: 0000000009000000 [ 82.876437][ T9463] FS: 0000000000b75880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 82.885341][ T9463] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.891911][ T9463] CR2: 0000000020000f92 CR3: 000000009abd2000 CR4: 00000000001406e0 [ 82.899867][ T9463] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.907832][ T9463] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.915778][ T9463] Call Trace: [ 82.919051][ T9463] ? hash_ip6_test+0x670/0x670 [ 82.923798][ T9463] ? hash_ip6_uadt+0x670/0x670 [ 82.928565][ T9463] ? nla_memcpy+0xb0/0xb0 [ 82.932875][ T9463] ? ip_set_utest+0x4aa/0x890 [ 82.937534][ T9463] ? __kasan_check_read+0x11/0x20 [ 82.942541][ T9463] ip_set_utest+0x55b/0x890 [ 82.947029][ T9463] ? ip_set_put_byindex+0x490/0x490 [ 82.952204][ T9463] ? __mutex_lock+0x458/0x13c0 [ 82.956954][ T9463] ? ip_set_put_byindex+0x490/0x490 [ 82.962155][ T9463] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 82.967093][ T9463] ? nfnetlink_bind+0x2c0/0x2c0 [ 82.971923][ T9463] ? __kasan_check_read+0x11/0x20 [ 82.976925][ T9463] ? __lock_acquire+0x8a0/0x4a00 [ 82.981843][ T9463] ? save_stack+0x5c/0x90 [ 82.986157][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 82.992392][ T9463] ? apparmor_capable+0x497/0x900 [ 82.997394][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.004241][ T9463] ? __kasan_check_read+0x11/0x20 [ 83.009258][ T9463] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 83.014712][ T9463] netlink_rcv_skb+0x177/0x450 [ 83.019454][ T9463] ? nfnetlink_bind+0x2c0/0x2c0 [ 83.024282][ T9463] ? netlink_ack+0xb50/0xb50 [ 83.028851][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.035068][ T9463] ? ns_capable_common+0x93/0x100 [ 83.040068][ T9463] ? ns_capable+0x20/0x30 [ 83.044392][ T9463] ? __netlink_ns_capable+0x104/0x140 [ 83.049743][ T9463] nfnetlink_rcv+0x1ba/0x460 [ 83.054313][ T9463] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 83.059746][ T9463] ? netlink_deliver_tap+0x24a/0xbe0 [ 83.065009][ T9463] ? __kasan_check_write+0x14/0x20 [ 83.070113][ T9463] netlink_unicast+0x58c/0x7d0 [ 83.074854][ T9463] ? netlink_attachskb+0x870/0x870 [ 83.079944][ T9463] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 83.085642][ T9463] ? __check_object_size+0x3d/0x437 [ 83.090817][ T9463] netlink_sendmsg+0x91c/0xea0 [ 83.095561][ T9463] ? netlink_unicast+0x7d0/0x7d0 [ 83.100490][ T9463] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 83.106037][ T9463] ? apparmor_socket_sendmsg+0x2a/0x30 [ 83.111486][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.117706][ T9463] ? security_socket_sendmsg+0x8d/0xc0 [ 83.123142][ T9463] ? netlink_unicast+0x7d0/0x7d0 [ 83.128069][ T9463] sock_sendmsg+0xd7/0x130 [ 83.132462][ T9463] ____sys_sendmsg+0x753/0x880 [ 83.137205][ T9463] ? kernel_sendmsg+0x50/0x50 [ 83.141862][ T9463] ? lockdep_init_map+0x1be/0x6d0 [ 83.146868][ T9463] ___sys_sendmsg+0x100/0x170 [ 83.151521][ T9463] ? sendmsg_copy_msghdr+0x70/0x70 [ 83.156620][ T9463] ? __kasan_check_read+0x11/0x20 [ 83.161634][ T9463] ? __lock_acquire+0x8a0/0x4a00 [ 83.166552][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.172768][ T9463] ? __this_cpu_preempt_check+0x35/0x190 [ 83.178376][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.184593][ T9463] ? percpu_counter_add_batch+0x13c/0x190 [ 83.190302][ T9463] ? __fd_install+0x1bc/0x640 [ 83.194955][ T9463] ? find_held_lock+0x35/0x130 [ 83.199692][ T9463] ? __fd_install+0x1bc/0x640 [ 83.204353][ T9463] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 83.210744][ T9463] ? __fget_light+0x1a9/0x230 [ 83.215398][ T9463] ? __fdget+0x1b/0x20 [ 83.219443][ T9463] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.225661][ T9463] __sys_sendmsg+0x105/0x1d0 [ 83.230227][ T9463] ? __sys_sendmsg_sock+0xc0/0xc0 [ 83.235234][ T9463] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 83.240667][ T9463] ? do_syscall_64+0x26/0x790 [ 83.245322][ T9463] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.251382][ T9463] ? do_syscall_64+0x26/0x790 [ 83.256058][ T9463] __x64_sys_sendmsg+0x78/0xb0 [ 83.260800][ T9463] do_syscall_64+0xfa/0x790 [ 83.265282][ T9463] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.271165][ T9463] RIP: 0033:0x440509 [ 83.275053][ T9463] 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 [ 83.294634][ T9463] RSP: 002b:00007ffdaba731e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 83.303045][ T9463] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440509 [ 83.311013][ T9463] RDX: 0000000000000000 RSI: 0000000020001a00 RDI: 0000000000000004 [ 83.318970][ T9463] RBP: 00000000006ca018 R08: 000000000000000c R09: 00000000004002c8 [ 83.326969][ T9463] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000401d90 [ 83.334922][ T9463] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 83.342872][ T9463] Modules linked in: [ 83.346797][ T9463] ---[ end trace 16a07ca8881b81d4 ]--- [ 83.352261][ T9463] RIP: 0010:hash_ip4_uadt+0x1f5/0x7a0 [ 83.357648][ T9463] 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 [ 83.377297][ T9463] RSP: 0018:ffffc90001d97190 EFLAGS: 00010246 [ 83.383357][ T9463] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 83.391354][ T9463] RDX: 0000000000000000 RSI: ffffffff86790b92 RDI: ffff8880a913c030 [ 83.399336][ T9463] RBP: ffffc90001d972b8 R08: 0000000000000000 R09: 0000000000000000 [ 83.407317][ T9463] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a65d5a00 [ 83.415314][ T9463] R13: ffffc90001d97320 R14: 0000000000000002 R15: 0000000009000000 [ 83.423282][ T9463] FS: 0000000000b75880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.432246][ T9463] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.438841][ T9463] CR2: 0000000020000f92 CR3: 000000009abd2000 CR4: 00000000001406e0 [ 83.446825][ T9463] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.454807][ T9463] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.462770][ T9463] Kernel panic - not syncing: Fatal exception in interrupt [ 83.471181][ T9463] Kernel Offset: disabled [ 83.475510][ T9463] Rebooting in 86400 seconds..