[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.104875][ T26] audit: type=1800 audit(1578434720.336:25): pid=9616 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.125861][ T26] audit: type=1800 audit(1578434720.336:26): pid=9616 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.172731][ T26] audit: type=1800 audit(1578434720.336:27): pid=9616 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 81.304984][ T9768] kasan: CONFIG_KASAN_INLINE enabled [ 81.310409][ T9768] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 81.318564][ T9768] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 81.325520][ T9768] CPU: 0 PID: 9768 Comm: syz-executor436 Not tainted 5.5.0-rc4-syzkaller #0 [ 81.334743][ T9768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.344822][ T9768] RIP: 0010:hash_netnet4_uadt+0x1ff/0xdf0 [ 81.350525][ T9768] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e8 09 00 00 48 89 da 45 8b 6d 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 ad [ 81.370116][ T9768] RSP: 0018:ffffc90007827180 EFLAGS: 00010246 [ 81.376175][ T9768] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 81.384128][ T9768] RDX: 0000000000000000 RSI: ffffffff86878dcc RDI: ffff88809f385c64 [ 81.392076][ T9768] RBP: ffffc900078272b8 R08: 0000000000000000 R09: 0000000000000000 [ 81.400475][ T9768] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffffc90007827320 [ 81.408867][ T9768] R13: 00000000d3650000 R14: ffffc90007827200 R15: ffff8880a3f94400 [ 81.416826][ T9768] FS: 0000000000cbc880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 81.425824][ T9768] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.432669][ T9768] CR2: 0000000020000f98 CR3: 000000009515f000 CR4: 00000000001406f0 [ 81.440652][ T9768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.448615][ T9768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.456564][ T9768] Call Trace: [ 81.459839][ T9768] ? hash_netnet6_test+0x17d0/0x17d0 [ 81.465121][ T9768] ? hash_netnet6_uadt+0xae0/0xae0 [ 81.470219][ T9768] ? nla_memcpy+0xb0/0xb0 [ 81.474546][ T9768] ? lock_acquire+0x190/0x410 [ 81.479226][ T9768] ? __kasan_check_read+0x11/0x20 [ 81.484339][ T9768] ip_set_utest+0x55b/0x890 [ 81.488842][ T9768] ? ip_set_put_byindex+0x490/0x490 [ 81.494059][ T9768] ? __mutex_lock+0x458/0x13c0 [ 81.498821][ T9768] ? ip_set_put_byindex+0x490/0x490 [ 81.504014][ T9768] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 81.508943][ T9768] ? nfnetlink_bind+0x2c0/0x2c0 [ 81.513795][ T9768] ? __kasan_check_read+0x11/0x20 [ 81.518821][ T9768] ? __lock_acquire+0x8a0/0x4a00 [ 81.523765][ T9768] ? save_stack+0x5c/0x90 [ 81.528097][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.534336][ T9768] ? apparmor_capable+0x497/0x900 [ 81.539365][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.545640][ T9768] ? __kasan_check_read+0x11/0x20 [ 81.550744][ T9768] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 81.556195][ T9768] netlink_rcv_skb+0x177/0x450 [ 81.560939][ T9768] ? nfnetlink_bind+0x2c0/0x2c0 [ 81.565774][ T9768] ? netlink_ack+0xb50/0xb50 [ 81.570469][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.576811][ T9768] ? ns_capable_common+0x93/0x100 [ 81.581816][ T9768] ? ns_capable+0x20/0x30 [ 81.586142][ T9768] ? __netlink_ns_capable+0x104/0x140 [ 81.591641][ T9768] nfnetlink_rcv+0x1ba/0x460 [ 81.596226][ T9768] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 81.601668][ T9768] ? netlink_deliver_tap+0x24a/0xbe0 [ 81.606949][ T9768] ? __kasan_check_write+0x14/0x20 [ 81.612051][ T9768] netlink_unicast+0x58c/0x7d0 [ 81.616798][ T9768] ? netlink_attachskb+0x870/0x870 [ 81.621901][ T9768] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 81.627602][ T9768] ? __check_object_size+0x3d/0x437 [ 81.632781][ T9768] netlink_sendmsg+0x91c/0xea0 [ 81.637525][ T9768] ? netlink_unicast+0x7d0/0x7d0 [ 81.642464][ T9768] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 81.648693][ T9768] ? apparmor_socket_sendmsg+0x2a/0x30 [ 81.654132][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.660352][ T9768] ? security_socket_sendmsg+0x8d/0xc0 [ 81.665809][ T9768] ? netlink_unicast+0x7d0/0x7d0 [ 81.670865][ T9768] sock_sendmsg+0xd7/0x130 [ 81.675275][ T9768] ____sys_sendmsg+0x753/0x880 [ 81.680094][ T9768] ? kernel_sendmsg+0x50/0x50 [ 81.684961][ T9768] ? lockdep_init_map+0x1be/0x6d0 [ 81.689985][ T9768] ___sys_sendmsg+0x100/0x170 [ 81.694653][ T9768] ? sendmsg_copy_msghdr+0x70/0x70 [ 81.699774][ T9768] ? __kasan_check_read+0x11/0x20 [ 81.704789][ T9768] ? __lock_acquire+0x8a0/0x4a00 [ 81.709743][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.716247][ T9768] ? __this_cpu_preempt_check+0x35/0x190 [ 81.722272][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.728517][ T9768] ? percpu_counter_add_batch+0x13c/0x190 [ 81.734235][ T9768] ? __fd_install+0x1bc/0x640 [ 81.738913][ T9768] ? find_held_lock+0x35/0x130 [ 81.743837][ T9768] ? __fd_install+0x1bc/0x640 [ 81.748524][ T9768] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 81.754750][ T9768] ? __fget_light+0x1a9/0x230 [ 81.759427][ T9768] ? __fdget+0x1b/0x20 [ 81.763481][ T9768] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 81.769701][ T9768] __sys_sendmsg+0x105/0x1d0 [ 81.774271][ T9768] ? __sys_sendmsg_sock+0xc0/0xc0 [ 81.779301][ T9768] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 81.784738][ T9768] ? do_syscall_64+0x26/0x790 [ 81.789408][ T9768] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.795452][ T9768] ? do_syscall_64+0x26/0x790 [ 81.800120][ T9768] __x64_sys_sendmsg+0x78/0xb0 [ 81.804885][ T9768] do_syscall_64+0xfa/0x790 [ 81.809374][ T9768] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 81.821213][ T9768] RIP: 0033:0x4408a9 [ 81.825116][ T9768] 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 [ 81.844799][ T9768] RSP: 002b:00007ffd4ab5fc18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 81.853317][ T9768] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004408a9 [ 81.861276][ T9768] RDX: 0000000020000000 RSI: 0000000020000140 RDI: 0000000000000004 [ 81.869245][ T9768] RBP: 00000000006ca018 R08: 000000000000000c R09: 00000000004002c8 [ 81.877198][ T9768] R10: 000000000000002c R11: 0000000000000246 R12: 0000000000402130 [ 81.885149][ T9768] R13: 00000000004021c0 R14: 0000000000000000 R15: 0000000000000000 [ 81.893115][ T9768] Modules linked in: [ 81.897095][ T9768] ---[ end trace 2ac190f422cfe59f ]--- [ 81.902623][ T9768] RIP: 0010:hash_netnet4_uadt+0x1ff/0xdf0 [ 81.909443][ T9768] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e8 09 00 00 48 89 da 45 8b 6d 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 ad [ 81.929361][ T9768] RSP: 0018:ffffc90007827180 EFLAGS: 00010246 [ 81.935466][ T9768] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 81.943541][ T9768] RDX: 0000000000000000 RSI: ffffffff86878dcc RDI: ffff88809f385c64 [ 81.951529][ T9768] RBP: ffffc900078272b8 R08: 0000000000000000 R09: 0000000000000000 [ 81.959596][ T9768] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffffc90007827320 [ 81.967627][ T9768] R13: 00000000d3650000 R14: ffffc90007827200 R15: ffff8880a3f94400 [ 81.975639][ T9768] FS: 0000000000cbc880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 81.984724][ T9768] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.991297][ T9768] CR2: 0000000020000f98 CR3: 000000009515f000 CR4: 00000000001406f0 [ 81.999308][ T9768] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.007301][ T9768] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.015718][ T9768] Kernel panic - not syncing: Fatal exception in interrupt [ 82.024525][ T9768] Kernel Offset: disabled [ 82.028883][ T9768] Rebooting in 86400 seconds..