[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.412738][ T27] audit: type=1800 audit(1578502531.469:25): pid=9377 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.433308][ T27] audit: type=1800 audit(1578502531.469:26): pid=9377 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.480805][ T27] audit: type=1800 audit(1578502531.469:27): pid=9377 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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 88.645809][ T9532] kasan: CONFIG_KASAN_INLINE enabled [ 88.651275][ T9532] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 88.659385][ T9532] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 88.666364][ T9532] CPU: 0 PID: 9532 Comm: syz-executor418 Not tainted 5.5.0-rc4-syzkaller #0 [ 88.675009][ T9532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.685056][ T9532] RIP: 0010:hash_ipportip6_uadt+0x226/0xa00 [ 88.690929][ T9532] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 14 07 00 00 4c 89 ea 45 8b 76 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d9 [ 88.710523][ T9532] RSP: 0018:ffffc90007c1f170 EFLAGS: 00010246 [ 88.717011][ T9532] RAX: dffffc0000000000 RBX: ffffc90007c1f320 RCX: 0000000000000000 [ 88.724974][ T9532] RDX: 0000000000000000 RSI: ffffffff867d0143 RDI: ffff88809a51a030 [ 88.733632][ T9532] RBP: ffffc90007c1f2b8 R08: 0000000000000000 R09: 0000000000000000 [ 88.742458][ T9532] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a64c0200 [ 88.750422][ T9532] R13: 0000000000000000 R14: 0000000004000000 R15: 0000000000000002 [ 88.758389][ T9532] FS: 00000000019f7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 88.767312][ T9532] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.773893][ T9532] CR2: 0000000020000180 CR3: 00000000a9385000 CR4: 00000000001406f0 [ 88.782210][ T9532] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.790175][ T9532] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.798123][ T9532] Call Trace: [ 88.801413][ T9532] ? hash_ipportip4_test+0x6c0/0x6c0 [ 88.806679][ T9532] ? hash_ipportip6_same_set+0x1a0/0x1a0 [ 88.812295][ T9532] ? ip_set_utest+0x4aa/0x890 [ 88.816951][ T9532] ? __kasan_check_read+0x11/0x20 [ 88.822053][ T9532] ip_set_utest+0x55b/0x890 [ 88.826609][ T9532] ? ip_set_put_byindex+0x490/0x490 [ 88.831797][ T9532] ? __mutex_lock+0x458/0x13c0 [ 88.836556][ T9532] ? ip_set_put_byindex+0x490/0x490 [ 88.841846][ T9532] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 88.846778][ T9532] ? nfnetlink_bind+0x2c0/0x2c0 [ 88.851621][ T9532] ? __kasan_check_read+0x11/0x20 [ 88.856631][ T9532] ? __lock_acquire+0x8a0/0x4a00 [ 88.861574][ T9532] ? save_stack+0x5c/0x90 [ 88.866839][ T9532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.873063][ T9532] ? apparmor_capable+0x497/0x900 [ 88.878069][ T9532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.884289][ T9532] ? __kasan_check_read+0x11/0x20 [ 88.889302][ T9532] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 88.894761][ T9532] netlink_rcv_skb+0x177/0x450 [ 88.899509][ T9532] ? nfnetlink_bind+0x2c0/0x2c0 [ 88.904341][ T9532] ? netlink_ack+0xb50/0xb50 [ 88.908925][ T9532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.915150][ T9532] ? ns_capable_common+0x93/0x100 [ 88.920165][ T9532] ? ns_capable+0x20/0x30 [ 88.924474][ T9532] ? __netlink_ns_capable+0x104/0x140 [ 88.929834][ T9532] nfnetlink_rcv+0x1ba/0x460 [ 88.934408][ T9532] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 88.939861][ T9532] ? netlink_deliver_tap+0x24a/0xbe0 [ 88.945145][ T9532] ? __kasan_check_write+0x14/0x20 [ 88.950237][ T9532] netlink_unicast+0x58c/0x7d0 [ 88.954982][ T9532] ? netlink_attachskb+0x870/0x870 [ 88.960077][ T9532] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 88.965782][ T9532] ? __check_object_size+0x3d/0x437 [ 88.970960][ T9532] netlink_sendmsg+0x91c/0xea0 [ 88.975706][ T9532] ? netlink_unicast+0x7d0/0x7d0 [ 88.980659][ T9532] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 88.986193][ T9532] ? apparmor_socket_sendmsg+0x2a/0x30 [ 88.991658][ T9532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 88.997898][ T9532] ? security_socket_sendmsg+0x8d/0xc0 [ 89.003440][ T9532] ? netlink_unicast+0x7d0/0x7d0 [ 89.008366][ T9532] sock_sendmsg+0xd7/0x130 [ 89.012786][ T9532] ____sys_sendmsg+0x753/0x880 [ 89.017549][ T9532] ? kernel_sendmsg+0x50/0x50 [ 89.022212][ T9532] ? _raw_spin_unlock+0x28/0x40 [ 89.027181][ T9532] ? do_huge_pmd_wp_page+0x53a/0x21c0 [ 89.032552][ T9532] ___sys_sendmsg+0x100/0x170 [ 89.037212][ T9532] ? sendmsg_copy_msghdr+0x70/0x70 [ 89.042304][ T9532] ? fault_around_bytes_set+0xa0/0xa0 [ 89.047658][ T9532] ? __do_page_fault+0x56a/0xd80 [ 89.052575][ T9532] ? find_held_lock+0x35/0x130 [ 89.057320][ T9532] ? __do_page_fault+0x56a/0xd80 [ 89.062239][ T9532] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 89.068458][ T9532] ? __fget_light+0x1a9/0x230 [ 89.073113][ T9532] ? __fdget+0x1b/0x20 [ 89.077161][ T9532] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 89.083386][ T9532] __sys_sendmsg+0x105/0x1d0 [ 89.088086][ T9532] ? __sys_sendmsg_sock+0xc0/0xc0 [ 89.093162][ T9532] ? down_read_non_owner+0x490/0x490 [ 89.098443][ T9532] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 89.103931][ T9532] ? do_syscall_64+0x26/0x790 [ 89.108593][ T9532] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.114645][ T9532] ? do_syscall_64+0x26/0x790 [ 89.119309][ T9532] __x64_sys_sendmsg+0x78/0xb0 [ 89.124052][ T9532] do_syscall_64+0xfa/0x790 [ 89.128581][ T9532] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 89.134899][ T9532] RIP: 0033:0x441469 [ 89.138782][ T9532] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 89.158366][ T9532] RSP: 002b:00007fffce63eef8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 89.166772][ T9532] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441469 [ 89.174752][ T9532] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 89.182704][ T9532] RBP: 0000000000015a25 R08: 00000000004002c8 R09: 00000000004002c8 [ 89.190660][ T9532] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402290 [ 89.198614][ T9532] R13: 0000000000402320 R14: 0000000000000000 R15: 0000000000000000 [ 89.206581][ T9532] Modules linked in: [ 89.210516][ T9532] ---[ end trace b3d31d52713880a6 ]--- [ 89.215995][ T9532] RIP: 0010:hash_ipportip6_uadt+0x226/0xa00 [ 89.221920][ T9532] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 14 07 00 00 4c 89 ea 45 8b 76 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 d9 [ 89.241550][ T9532] RSP: 0018:ffffc90007c1f170 EFLAGS: 00010246 [ 89.247612][ T9532] RAX: dffffc0000000000 RBX: ffffc90007c1f320 RCX: 0000000000000000 [ 89.255784][ T9532] RDX: 0000000000000000 RSI: ffffffff867d0143 RDI: ffff88809a51a030 [ 89.263806][ T9532] RBP: ffffc90007c1f2b8 R08: 0000000000000000 R09: 0000000000000000 [ 89.271795][ T9532] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a64c0200 [ 89.279764][ T9532] R13: 0000000000000000 R14: 0000000004000000 R15: 0000000000000002 [ 89.287797][ T9532] FS: 00000000019f7880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 89.296754][ T9532] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.303476][ T9532] CR2: 0000000020000180 CR3: 00000000a9385000 CR4: 00000000001406f0 [ 89.311485][ T9532] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.319441][ T9532] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.327429][ T9532] Kernel panic - not syncing: Fatal exception in interrupt [ 89.336190][ T9532] Kernel Offset: disabled [ 89.340564][ T9532] Rebooting in 86400 seconds..