[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 67.587466][ T27] audit: type=1800 audit(1578465636.781:25): pid=9541 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 67.607182][ T27] audit: type=1800 audit(1578465636.781:26): pid=9541 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 67.652384][ T27] audit: type=1800 audit(1578465636.781:27): pid=9541 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 '10.128.0.216' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.412906][ T9692] kasan: CONFIG_KASAN_INLINE enabled [ 77.418402][ T9692] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 77.426529][ T9692] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 77.433461][ T9692] CPU: 1 PID: 9692 Comm: syz-executor753 Not tainted 5.5.0-rc5-syzkaller #0 [ 77.442107][ T9692] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.452191][ T9692] RIP: 0010:hash_ip4_uadt+0x1f5/0x7a0 [ 77.457543][ T9692] 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 [ 77.477126][ T9692] RSP: 0018:ffffc90001f77190 EFLAGS: 00010246 [ 77.483193][ T9692] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 77.491312][ T9692] RDX: 0000000000000000 RSI: ffffffff86790b92 RDI: ffff8880a800ac30 [ 77.499258][ T9692] RBP: ffffc90001f772b8 R08: 0000000000000000 R09: 0000000000000000 [ 77.507206][ T9692] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a97e8800 [ 77.515153][ T9692] R13: ffffc90001f77320 R14: 0000000000000002 R15: 0000000009000000 [ 77.523119][ T9692] FS: 00000000013f7880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 77.532030][ T9692] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.538602][ T9692] CR2: 0000000020000f92 CR3: 00000000924aa000 CR4: 00000000001406e0 [ 77.546564][ T9692] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.554527][ T9692] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.563968][ T9692] Call Trace: [ 77.567239][ T9692] ? hash_ip6_test+0x670/0x670 [ 77.571988][ T9692] ? hash_ip6_uadt+0x670/0x670 [ 77.576728][ T9692] ? nla_memcpy+0xb0/0xb0 [ 77.581056][ T9692] ? ip_set_utest+0x4aa/0x890 [ 77.585744][ T9692] ? __kasan_check_read+0x11/0x20 [ 77.590766][ T9692] ip_set_utest+0x55b/0x890 [ 77.595261][ T9692] ? ip_set_put_byindex+0x490/0x490 [ 77.600453][ T9692] ? __mutex_lock+0x458/0x13c0 [ 77.605220][ T9692] ? ip_set_put_byindex+0x490/0x490 [ 77.610398][ T9692] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 77.615327][ T9692] ? nfnetlink_bind+0x2c0/0x2c0 [ 77.620159][ T9692] ? __kasan_check_read+0x11/0x20 [ 77.625164][ T9692] ? __lock_acquire+0x8a0/0x4a00 [ 77.630214][ T9692] ? save_stack+0x5c/0x90 [ 77.634526][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.640752][ T9692] ? apparmor_capable+0x497/0x900 [ 77.645768][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.651984][ T9692] ? __kasan_check_read+0x11/0x20 [ 77.656987][ T9692] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 77.662428][ T9692] netlink_rcv_skb+0x177/0x450 [ 77.667253][ T9692] ? nfnetlink_bind+0x2c0/0x2c0 [ 77.672080][ T9692] ? netlink_ack+0xb50/0xb50 [ 77.676660][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.682894][ T9692] ? ns_capable_common+0x93/0x100 [ 77.687904][ T9692] ? ns_capable+0x20/0x30 [ 77.692215][ T9692] ? __netlink_ns_capable+0x104/0x140 [ 77.697572][ T9692] nfnetlink_rcv+0x1ba/0x460 [ 77.702140][ T9692] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 77.707606][ T9692] ? netlink_deliver_tap+0x24a/0xbe0 [ 77.712872][ T9692] ? __kasan_check_write+0x14/0x20 [ 77.718004][ T9692] netlink_unicast+0x58c/0x7d0 [ 77.722762][ T9692] ? netlink_attachskb+0x870/0x870 [ 77.727957][ T9692] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 77.733671][ T9692] ? __check_object_size+0x3d/0x437 [ 77.738907][ T9692] netlink_sendmsg+0x91c/0xea0 [ 77.743670][ T9692] ? netlink_unicast+0x7d0/0x7d0 [ 77.748599][ T9692] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 77.754156][ T9692] ? apparmor_socket_sendmsg+0x2a/0x30 [ 77.759613][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.765848][ T9692] ? security_socket_sendmsg+0x8d/0xc0 [ 77.771281][ T9692] ? netlink_unicast+0x7d0/0x7d0 [ 77.776197][ T9692] sock_sendmsg+0xd7/0x130 [ 77.780603][ T9692] ____sys_sendmsg+0x753/0x880 [ 77.785345][ T9692] ? kernel_sendmsg+0x50/0x50 [ 77.790000][ T9692] ? lockdep_init_map+0x1be/0x6d0 [ 77.795023][ T9692] ___sys_sendmsg+0x100/0x170 [ 77.799786][ T9692] ? sendmsg_copy_msghdr+0x70/0x70 [ 77.804875][ T9692] ? __kasan_check_read+0x11/0x20 [ 77.809881][ T9692] ? __lock_acquire+0x8a0/0x4a00 [ 77.814796][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.821110][ T9692] ? __this_cpu_preempt_check+0x35/0x190 [ 77.826736][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.832962][ T9692] ? percpu_counter_add_batch+0x13c/0x190 [ 77.838755][ T9692] ? __fd_install+0x1bc/0x640 [ 77.843411][ T9692] ? find_held_lock+0x35/0x130 [ 77.848151][ T9692] ? __fd_install+0x1bc/0x640 [ 77.852808][ T9692] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.859025][ T9692] ? __fget_light+0x1a9/0x230 [ 77.863689][ T9692] ? __fdget+0x1b/0x20 [ 77.867736][ T9692] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.873960][ T9692] __sys_sendmsg+0x105/0x1d0 [ 77.878546][ T9692] ? __sys_sendmsg_sock+0xc0/0xc0 [ 77.883558][ T9692] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.889000][ T9692] ? do_syscall_64+0x26/0x790 [ 77.893744][ T9692] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.899804][ T9692] ? do_syscall_64+0x26/0x790 [ 77.904515][ T9692] __x64_sys_sendmsg+0x78/0xb0 [ 77.909263][ T9692] do_syscall_64+0xfa/0x790 [ 77.913769][ T9692] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.919645][ T9692] RIP: 0033:0x440509 [ 77.923544][ T9692] 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 [ 77.943223][ T9692] RSP: 002b:00007ffc7471a6a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 77.951669][ T9692] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440509 [ 77.959676][ T9692] RDX: 0000000000000000 RSI: 0000000020001a00 RDI: 0000000000000004 [ 77.967738][ T9692] RBP: 00000000006ca018 R08: 000000000000000c R09: 00000000004002c8 [ 77.975698][ T9692] R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000401d90 [ 77.983677][ T9692] R13: 0000000000401e20 R14: 0000000000000000 R15: 0000000000000000 [ 77.991642][ T9692] Modules linked in: [ 77.995638][ T9692] ---[ end trace be91508e4dae6d97 ]--- [ 78.001104][ T9692] RIP: 0010:hash_ip4_uadt+0x1f5/0x7a0 [ 78.006512][ T9692] 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 [ 78.026198][ T9692] RSP: 0018:ffffc90001f77190 EFLAGS: 00010246 [ 78.033319][ T9692] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 78.041319][ T9692] RDX: 0000000000000000 RSI: ffffffff86790b92 RDI: ffff8880a800ac30 [ 78.049336][ T9692] RBP: ffffc90001f772b8 R08: 0000000000000000 R09: 0000000000000000 [ 78.057341][ T9692] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a97e8800 [ 78.065341][ T9692] R13: ffffc90001f77320 R14: 0000000000000002 R15: 0000000009000000 [ 78.073366][ T9692] FS: 00000000013f7880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 78.082405][ T9692] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.088987][ T9692] CR2: 0000000020000f92 CR3: 00000000924aa000 CR4: 00000000001406e0 [ 78.096988][ T9692] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.105036][ T9692] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.113029][ T9692] Kernel panic - not syncing: Fatal exception in interrupt [ 78.121599][ T9692] Kernel Offset: disabled [ 78.126048][ T9692] Rebooting in 86400 seconds..