[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 81.315873][ T27] audit: type=1800 audit(1578497186.754:25): pid=9360 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.349831][ T27] audit: type=1800 audit(1578497186.754:26): pid=9360 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.392883][ T27] audit: type=1800 audit(1578497186.754:27): pid=9360 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 '10.128.0.103' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 91.921989][ T9515] kasan: CONFIG_KASAN_INLINE enabled [ 91.927408][ T9515] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 91.935551][ T9515] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 91.942486][ T9515] CPU: 0 PID: 9515 Comm: syz-executor397 Not tainted 5.5.0-rc5-syzkaller #0 [ 91.951131][ T9515] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.961184][ T9515] RIP: 0010:hash_ipportip6_uadt+0x226/0xa00 [ 91.967133][ T9515] 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 [ 91.986725][ T9515] RSP: 0018:ffffc90001d07170 EFLAGS: 00010246 [ 91.992770][ T9515] RAX: dffffc0000000000 RBX: ffffc90001d07320 RCX: 0000000000000000 [ 92.000778][ T9515] RDX: 0000000000000000 RSI: ffffffff867d0153 RDI: ffff888094d55430 [ 92.008741][ T9515] RBP: ffffc90001d072b8 R08: 0000000000000000 R09: 0000000000000000 [ 92.016694][ T9515] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a6f34c00 [ 92.024645][ T9515] R13: 0000000000000000 R14: 0000000004000000 R15: 0000000000000002 [ 92.032598][ T9515] FS: 0000000001348880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.041502][ T9515] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.048081][ T9515] CR2: 0000000020000180 CR3: 00000000a2c54000 CR4: 00000000001406f0 [ 92.056032][ T9515] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.063981][ T9515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.071926][ T9515] Call Trace: [ 92.075200][ T9515] ? hash_ipportip4_test+0x6c0/0x6c0 [ 92.080466][ T9515] ? hash_ipportip6_same_set+0x1a0/0x1a0 [ 92.086129][ T9515] ? ip_set_utest+0x4aa/0x890 [ 92.090816][ T9515] ? __kasan_check_read+0x11/0x20 [ 92.095824][ T9515] ip_set_utest+0x55b/0x890 [ 92.100311][ T9515] ? ip_set_put_byindex+0x490/0x490 [ 92.105575][ T9515] ? __mutex_lock+0x458/0x13c0 [ 92.110348][ T9515] ? ip_set_put_byindex+0x490/0x490 [ 92.115530][ T9515] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 92.120468][ T9515] ? nfnetlink_bind+0x2c0/0x2c0 [ 92.125319][ T9515] ? __kasan_check_read+0x11/0x20 [ 92.130323][ T9515] ? __lock_acquire+0x8a0/0x4a00 [ 92.135689][ T9515] ? save_stack+0x5c/0x90 [ 92.139999][ T9515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.146218][ T9515] ? apparmor_capable+0x497/0x900 [ 92.151222][ T9515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.157440][ T9515] ? __kasan_check_read+0x11/0x20 [ 92.162444][ T9515] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 92.167902][ T9515] netlink_rcv_skb+0x177/0x450 [ 92.172649][ T9515] ? nfnetlink_bind+0x2c0/0x2c0 [ 92.177588][ T9515] ? netlink_ack+0xb50/0xb50 [ 92.182158][ T9515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.188375][ T9515] ? ns_capable_common+0x93/0x100 [ 92.193382][ T9515] ? ns_capable+0x20/0x30 [ 92.197702][ T9515] ? __netlink_ns_capable+0x104/0x140 [ 92.203063][ T9515] nfnetlink_rcv+0x1ba/0x460 [ 92.207632][ T9515] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 92.213069][ T9515] ? netlink_deliver_tap+0x24a/0xbe0 [ 92.218334][ T9515] ? __kasan_check_write+0x14/0x20 [ 92.223444][ T9515] netlink_unicast+0x58c/0x7d0 [ 92.228190][ T9515] ? netlink_attachskb+0x870/0x870 [ 92.233295][ T9515] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 92.238992][ T9515] ? __check_object_size+0x3d/0x437 [ 92.244169][ T9515] netlink_sendmsg+0x91c/0xea0 [ 92.248920][ T9515] ? netlink_unicast+0x7d0/0x7d0 [ 92.253837][ T9515] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 92.259358][ T9515] ? apparmor_socket_sendmsg+0x2a/0x30 [ 92.264795][ T9515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.271029][ T9515] ? security_socket_sendmsg+0x8d/0xc0 [ 92.276641][ T9515] ? netlink_unicast+0x7d0/0x7d0 [ 92.281644][ T9515] sock_sendmsg+0xd7/0x130 [ 92.286040][ T9515] ____sys_sendmsg+0x753/0x880 [ 92.290784][ T9515] ? kernel_sendmsg+0x50/0x50 [ 92.295443][ T9515] ? _raw_spin_unlock+0x28/0x40 [ 92.300291][ T9515] ? do_huge_pmd_wp_page+0x53a/0x21c0 [ 92.305647][ T9515] ___sys_sendmsg+0x100/0x170 [ 92.310301][ T9515] ? sendmsg_copy_msghdr+0x70/0x70 [ 92.315415][ T9515] ? fault_around_bytes_set+0xa0/0xa0 [ 92.320774][ T9515] ? __do_page_fault+0x56a/0xd80 [ 92.325691][ T9515] ? find_held_lock+0x35/0x130 [ 92.330442][ T9515] ? __do_page_fault+0x56a/0xd80 [ 92.335366][ T9515] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 92.341675][ T9515] ? __fget_light+0x1a9/0x230 [ 92.346339][ T9515] ? __fdget+0x1b/0x20 [ 92.350388][ T9515] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.356635][ T9515] __sys_sendmsg+0x105/0x1d0 [ 92.361558][ T9515] ? __sys_sendmsg_sock+0xc0/0xc0 [ 92.366568][ T9515] ? down_read_non_owner+0x490/0x490 [ 92.371854][ T9515] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.377291][ T9515] ? do_syscall_64+0x26/0x790 [ 92.381954][ T9515] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.388054][ T9515] ? do_syscall_64+0x26/0x790 [ 92.392713][ T9515] __x64_sys_sendmsg+0x78/0xb0 [ 92.397501][ T9515] do_syscall_64+0xfa/0x790 [ 92.401985][ T9515] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.407853][ T9515] RIP: 0033:0x441469 [ 92.411727][ T9515] 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 [ 92.431309][ T9515] RSP: 002b:00007ffe390fa778 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 92.439699][ T9515] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441469 [ 92.447671][ T9515] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 92.455619][ T9515] RBP: 00000000000166ea R08: 00000000004002c8 R09: 00000000004002c8 [ 92.463566][ T9515] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402290 [ 92.471515][ T9515] R13: 0000000000402320 R14: 0000000000000000 R15: 0000000000000000 [ 92.479467][ T9515] Modules linked in: [ 92.483396][ T9515] ---[ end trace 12a892406cf2adb8 ]--- [ 92.488857][ T9515] RIP: 0010:hash_ipportip6_uadt+0x226/0xa00 [ 92.494784][ T9515] 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 [ 92.515115][ T9515] RSP: 0018:ffffc90001d07170 EFLAGS: 00010246 [ 92.521186][ T9515] RAX: dffffc0000000000 RBX: ffffc90001d07320 RCX: 0000000000000000 [ 92.529150][ T9515] RDX: 0000000000000000 RSI: ffffffff867d0153 RDI: ffff888094d55430 [ 92.537133][ T9515] RBP: ffffc90001d072b8 R08: 0000000000000000 R09: 0000000000000000 [ 92.545128][ T9515] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a6f34c00 [ 92.553107][ T9515] R13: 0000000000000000 R14: 0000000004000000 R15: 0000000000000002 [ 92.561083][ T9515] FS: 0000000001348880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.570015][ T9515] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.576587][ T9515] CR2: 0000000020000180 CR3: 00000000a2c54000 CR4: 00000000001406f0 [ 92.584601][ T9515] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.592595][ T9515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.600574][ T9515] Kernel panic - not syncing: Fatal exception in interrupt [ 92.609237][ T9515] Kernel Offset: disabled [ 92.613566][ T9515] Rebooting in 86400 seconds..