[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.919010][ T27] audit: type=1800 audit(1578452714.717:25): pid=9335 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.954092][ T27] audit: type=1800 audit(1578452714.717:26): pid=9335 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 74.005806][ T27] audit: type=1800 audit(1578452714.717:27): pid=9335 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 '10.128.10.46' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.023276][ T9487] kasan: CONFIG_KASAN_INLINE enabled [ 85.028822][ T9487] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 85.036922][ T9487] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 85.043861][ T9487] CPU: 0 PID: 9487 Comm: syz-executor245 Not tainted 5.5.0-rc5-syzkaller #0 [ 85.052510][ T9487] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.062556][ T9487] RIP: 0010:hash_ipportnet6_uadt+0x232/0xeb0 [ 85.068517][ T9487] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 46 0a 00 00 4c 89 f2 45 8b 7f 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 31 [ 85.088152][ T9487] RSP: 0018:ffffc90001d4f160 EFLAGS: 00010246 [ 85.094201][ T9487] RAX: dffffc0000000000 RBX: ffffc90001d4f320 RCX: 0000000000000000 [ 85.102148][ T9487] RDX: 0000000000000000 RSI: ffffffff867e0fff RDI: ffff888097d2b0d8 [ 85.110095][ T9487] RBP: ffffc90001d4f2b8 R08: 0000000000000000 R09: 0000000000000000 [ 85.118046][ T9487] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a6e7a400 [ 85.125993][ T9487] R13: ffffc90001d4f1d0 R14: 0000000000000000 R15: 0000000007000000 [ 85.133962][ T9487] FS: 00000000017ad880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 85.142879][ T9487] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.149439][ T9487] CR2: 0000000020000022 CR3: 00000000a07c4000 CR4: 00000000001406f0 [ 85.157392][ T9487] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.165455][ T9487] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.173405][ T9487] Call Trace: [ 85.176684][ T9487] ? hash_ipportnet_create+0xa60/0xa60 [ 85.182124][ T9487] ? hash_ipportnet6_same_set+0x1a0/0x1a0 [ 85.187826][ T9487] ? ip_set_utest+0x4aa/0x890 [ 85.192486][ T9487] ? __kasan_check_read+0x11/0x20 [ 85.197489][ T9487] ip_set_utest+0x55b/0x890 [ 85.201968][ T9487] ? ip_set_put_byindex+0x490/0x490 [ 85.207194][ T9487] ? __mutex_lock+0x458/0x13c0 [ 85.211946][ T9487] ? ip_set_put_byindex+0x490/0x490 [ 85.217128][ T9487] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 85.222052][ T9487] ? nfnetlink_bind+0x2c0/0x2c0 [ 85.226884][ T9487] ? __kasan_check_read+0x11/0x20 [ 85.231883][ T9487] ? __lock_acquire+0x8a0/0x4a00 [ 85.236812][ T9487] ? save_stack+0x5c/0x90 [ 85.241146][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.247371][ T9487] ? apparmor_capable+0x497/0x900 [ 85.252436][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.258673][ T9487] ? __kasan_check_read+0x11/0x20 [ 85.263675][ T9487] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 85.269116][ T9487] netlink_rcv_skb+0x177/0x450 [ 85.273929][ T9487] ? nfnetlink_bind+0x2c0/0x2c0 [ 85.278768][ T9487] ? netlink_ack+0xb50/0xb50 [ 85.283333][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.289547][ T9487] ? ns_capable_common+0x93/0x100 [ 85.294546][ T9487] ? ns_capable+0x20/0x30 [ 85.298904][ T9487] ? __netlink_ns_capable+0x104/0x140 [ 85.304267][ T9487] nfnetlink_rcv+0x1ba/0x460 [ 85.308856][ T9487] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 85.314292][ T9487] ? netlink_deliver_tap+0x24a/0xbe0 [ 85.319553][ T9487] ? __kasan_check_write+0x14/0x20 [ 85.324690][ T9487] netlink_unicast+0x58c/0x7d0 [ 85.329478][ T9487] ? netlink_attachskb+0x870/0x870 [ 85.334567][ T9487] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 85.340260][ T9487] ? __check_object_size+0x3d/0x437 [ 85.345437][ T9487] netlink_sendmsg+0x91c/0xea0 [ 85.350179][ T9487] ? netlink_unicast+0x7d0/0x7d0 [ 85.355093][ T9487] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 85.360611][ T9487] ? apparmor_socket_sendmsg+0x2a/0x30 [ 85.366046][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.372266][ T9487] ? security_socket_sendmsg+0x8d/0xc0 [ 85.377700][ T9487] ? netlink_unicast+0x7d0/0x7d0 [ 85.382611][ T9487] sock_sendmsg+0xd7/0x130 [ 85.387006][ T9487] ____sys_sendmsg+0x753/0x880 [ 85.391746][ T9487] ? kernel_sendmsg+0x50/0x50 [ 85.396412][ T9487] ? lockdep_init_map+0x1be/0x6d0 [ 85.401414][ T9487] ___sys_sendmsg+0x100/0x170 [ 85.406071][ T9487] ? sendmsg_copy_msghdr+0x70/0x70 [ 85.411157][ T9487] ? __kasan_check_read+0x11/0x20 [ 85.416157][ T9487] ? __lock_acquire+0x8a0/0x4a00 [ 85.421080][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.427298][ T9487] ? __this_cpu_preempt_check+0x35/0x190 [ 85.432931][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.439146][ T9487] ? percpu_counter_add_batch+0x13c/0x190 [ 85.444849][ T9487] ? __fd_install+0x1bc/0x640 [ 85.449510][ T9487] ? find_held_lock+0x35/0x130 [ 85.454249][ T9487] ? __fd_install+0x1bc/0x640 [ 85.458907][ T9487] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.465258][ T9487] ? __fget_light+0x1a9/0x230 [ 85.469936][ T9487] ? __fdget+0x1b/0x20 [ 85.474006][ T9487] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.480246][ T9487] __sys_sendmsg+0x105/0x1d0 [ 85.484819][ T9487] ? __sys_sendmsg_sock+0xc0/0xc0 [ 85.489832][ T9487] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 85.495266][ T9487] ? do_syscall_64+0x26/0x790 [ 85.499944][ T9487] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.506016][ T9487] ? do_syscall_64+0x26/0x790 [ 85.510726][ T9487] __x64_sys_sendmsg+0x78/0xb0 [ 85.515473][ T9487] do_syscall_64+0xfa/0x790 [ 85.520000][ T9487] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.525915][ T9487] RIP: 0033:0x440f09 [ 85.529787][ T9487] 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 [ 85.549443][ T9487] RSP: 002b:00007ffe37c39a98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 85.557833][ T9487] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440f09 [ 85.565833][ T9487] RDX: 0000000004000100 RSI: 0000000020000400 RDI: 0000000000000004 [ 85.573968][ T9487] RBP: 00000000006cb018 R08: 0000000000000006 R09: 00000000004002c8 [ 85.581932][ T9487] R10: 000000000000000c R11: 0000000000000246 R12: 0000000000402790 [ 85.589889][ T9487] R13: 0000000000402820 R14: 0000000000000000 R15: 0000000000000000 [ 85.597978][ T9487] Modules linked in: [ 85.601914][ T9487] ---[ end trace aafe1911d6a05478 ]--- [ 85.607411][ T9487] RIP: 0010:hash_ipportnet6_uadt+0x232/0xeb0 [ 85.613386][ T9487] Code: 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 46 0a 00 00 4c 89 f2 45 8b 7f 04 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 31 [ 85.633087][ T9487] RSP: 0018:ffffc90001d4f160 EFLAGS: 00010246 [ 85.639229][ T9487] RAX: dffffc0000000000 RBX: ffffc90001d4f320 RCX: 0000000000000000 [ 85.647228][ T9487] RDX: 0000000000000000 RSI: ffffffff867e0fff RDI: ffff888097d2b0d8 [ 85.655243][ T9487] RBP: ffffc90001d4f2b8 R08: 0000000000000000 R09: 0000000000000000 [ 85.663200][ T9487] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a6e7a400 [ 85.671190][ T9487] R13: ffffc90001d4f1d0 R14: 0000000000000000 R15: 0000000007000000 [ 85.679197][ T9487] FS: 00000000017ad880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 85.688180][ T9487] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.694781][ T9487] CR2: 0000000020000022 CR3: 00000000a07c4000 CR4: 00000000001406f0 [ 85.702732][ T9487] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.710743][ T9487] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.718736][ T9487] Kernel panic - not syncing: Fatal exception in interrupt [ 85.727195][ T9487] Kernel Offset: disabled [ 85.731523][ T9487] Rebooting in 86400 seconds..