[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.635755][ T27] audit: type=1800 audit(1578480518.374:25): pid=9439 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.662709][ T27] audit: type=1800 audit(1578480518.374:26): pid=9439 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.711333][ T27] audit: type=1800 audit(1578480518.384:27): pid=9439 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 '10.128.0.10' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 96.718762][ T9593] kasan: CONFIG_KASAN_INLINE enabled [ 96.724198][ T9593] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 96.732327][ T9593] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 96.739317][ T9593] CPU: 0 PID: 9593 Comm: syz-executor653 Not tainted 5.5.0-rc5-syzkaller #0 [ 96.747964][ T9593] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.760141][ T9593] RIP: 0010:hash_netnet4_uadt+0x1ff/0xdf0 [ 96.765840][ T9593] 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 [ 96.785430][ T9593] RSP: 0018:ffffc90001d67180 EFLAGS: 00010246 [ 96.791477][ T9593] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 96.799441][ T9593] RDX: 0000000000000000 RSI: ffffffff868394cc RDI: ffff8880a8994c64 [ 96.807397][ T9593] RBP: ffffc90001d672b8 R08: 0000000000000000 R09: 0000000000000000 [ 96.815347][ T9593] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffffc90001d67320 [ 96.823295][ T9593] R13: 00000000d3650000 R14: ffffc90001d67200 R15: ffff8880a6c5fb00 [ 96.831417][ T9593] FS: 00000000017db880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 96.841547][ T9593] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.848116][ T9593] CR2: 0000000020000f86 CR3: 00000000a91e1000 CR4: 00000000001406f0 [ 96.856082][ T9593] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 96.864031][ T9593] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 96.871988][ T9593] Call Trace: [ 96.875264][ T9593] ? hash_netnet6_test+0x17d0/0x17d0 [ 96.880525][ T9593] ? hash_netnet6_uadt+0xae0/0xae0 [ 96.885625][ T9593] ? nla_memcpy+0xb0/0xb0 [ 96.889942][ T9593] ? lock_acquire+0x190/0x410 [ 96.894595][ T9593] ? __kasan_check_read+0x11/0x20 [ 96.899660][ T9593] ip_set_utest+0x55b/0x890 [ 96.904165][ T9593] ? ip_set_put_byindex+0x490/0x490 [ 96.909348][ T9593] ? __mutex_lock+0x458/0x13c0 [ 96.914101][ T9593] ? ip_set_put_byindex+0x490/0x490 [ 96.919290][ T9593] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 96.924228][ T9593] ? nfnetlink_bind+0x2c0/0x2c0 [ 96.929061][ T9593] ? __kasan_check_read+0x11/0x20 [ 96.934060][ T9593] ? __lock_acquire+0x8a0/0x4a00 [ 96.938971][ T9593] ? save_stack+0x5c/0x90 [ 96.943286][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.949514][ T9593] ? apparmor_capable+0x497/0x900 [ 96.954535][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.960750][ T9593] ? __kasan_check_read+0x11/0x20 [ 96.965752][ T9593] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 96.971212][ T9593] netlink_rcv_skb+0x177/0x450 [ 96.975956][ T9593] ? nfnetlink_bind+0x2c0/0x2c0 [ 96.980793][ T9593] ? netlink_ack+0xb50/0xb50 [ 96.985364][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.991592][ T9593] ? ns_capable_common+0x93/0x100 [ 96.996591][ T9593] ? ns_capable+0x20/0x30 [ 97.000915][ T9593] ? __netlink_ns_capable+0x104/0x140 [ 97.006276][ T9593] nfnetlink_rcv+0x1ba/0x460 [ 97.010842][ T9593] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 97.016285][ T9593] ? netlink_deliver_tap+0x24a/0xbe0 [ 97.021546][ T9593] ? __kasan_check_write+0x14/0x20 [ 97.026637][ T9593] netlink_unicast+0x58c/0x7d0 [ 97.031379][ T9593] ? netlink_attachskb+0x870/0x870 [ 97.036466][ T9593] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 97.042160][ T9593] ? __check_object_size+0x3d/0x437 [ 97.047352][ T9593] netlink_sendmsg+0x91c/0xea0 [ 97.052093][ T9593] ? netlink_unicast+0x7d0/0x7d0 [ 97.057008][ T9593] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 97.062531][ T9593] ? apparmor_socket_sendmsg+0x2a/0x30 [ 97.067993][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.074231][ T9593] ? security_socket_sendmsg+0x8d/0xc0 [ 97.079681][ T9593] ? netlink_unicast+0x7d0/0x7d0 [ 97.084611][ T9593] sock_sendmsg+0xd7/0x130 [ 97.089033][ T9593] ____sys_sendmsg+0x753/0x880 [ 97.093787][ T9593] ? kernel_sendmsg+0x50/0x50 [ 97.098444][ T9593] ? lockdep_init_map+0x1be/0x6d0 [ 97.103451][ T9593] ___sys_sendmsg+0x100/0x170 [ 97.108125][ T9593] ? sendmsg_copy_msghdr+0x70/0x70 [ 97.113214][ T9593] ? __kasan_check_read+0x11/0x20 [ 97.118225][ T9593] ? __lock_acquire+0x8a0/0x4a00 [ 97.123158][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.129378][ T9593] ? __this_cpu_preempt_check+0x35/0x190 [ 97.135000][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.141216][ T9593] ? percpu_counter_add_batch+0x13c/0x190 [ 97.146911][ T9593] ? __fd_install+0x1bc/0x640 [ 97.151561][ T9593] ? find_held_lock+0x35/0x130 [ 97.156300][ T9593] ? __fd_install+0x1bc/0x640 [ 97.160954][ T9593] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 97.167172][ T9593] ? __fget_light+0x1a9/0x230 [ 97.171871][ T9593] ? __fdget+0x1b/0x20 [ 97.175988][ T9593] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 97.182227][ T9593] __sys_sendmsg+0x105/0x1d0 [ 97.186919][ T9593] ? __sys_sendmsg_sock+0xc0/0xc0 [ 97.191933][ T9593] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 97.197376][ T9593] ? do_syscall_64+0x26/0x790 [ 97.202037][ T9593] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.208084][ T9593] ? do_syscall_64+0x26/0x790 [ 97.212745][ T9593] __x64_sys_sendmsg+0x78/0xb0 [ 97.217486][ T9593] do_syscall_64+0xfa/0x790 [ 97.221966][ T9593] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 97.227832][ T9593] RIP: 0033:0x440939 [ 97.231705][ T9593] 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 [ 97.251293][ T9593] RSP: 002b:00007ffe236b7a98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 97.259685][ T9593] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440939 [ 97.267645][ T9593] RDX: 0000000020000000 RSI: 0000000020000140 RDI: 0000000000000004 [ 97.275605][ T9593] RBP: 00000000006cb018 R08: 0000000000000008 R09: 00000000004002c8 [ 97.283572][ T9593] R10: 000000000000000c R11: 0000000000000246 R12: 00000000004021c0 [ 97.291535][ T9593] R13: 0000000000402250 R14: 0000000000000000 R15: 0000000000000000 [ 97.299497][ T9593] Modules linked in: [ 97.303422][ T9593] ---[ end trace cebf39d50d21fcf9 ]--- [ 97.308882][ T9593] RIP: 0010:hash_netnet4_uadt+0x1ff/0xdf0 [ 97.314626][ T9593] 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 [ 97.334241][ T9593] RSP: 0018:ffffc90001d67180 EFLAGS: 00010246 [ 97.343436][ T9593] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 97.351400][ T9593] RDX: 0000000000000000 RSI: ffffffff868394cc RDI: ffff8880a8994c64 [ 97.359399][ T9593] RBP: ffffc90001d672b8 R08: 0000000000000000 R09: 0000000000000000 [ 97.367391][ T9593] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffffc90001d67320 [ 97.375385][ T9593] R13: 00000000d3650000 R14: ffffc90001d67200 R15: ffff8880a6c5fb00 [ 97.383387][ T9593] FS: 00000000017db880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 97.392332][ T9593] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.398908][ T9593] CR2: 0000000020000f86 CR3: 00000000a91e1000 CR4: 00000000001406f0 [ 97.406892][ T9593] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 97.414865][ T9593] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 97.422837][ T9593] Kernel panic - not syncing: Fatal exception in interrupt [ 97.431356][ T9593] Kernel Offset: disabled [ 97.435679][ T9593] Rebooting in 86400 seconds..