[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 76.504204][ T26] audit: type=1800 audit(1578462521.599:25): pid=9390 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 76.524583][ T26] audit: type=1800 audit(1578462521.599:26): pid=9390 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 76.582362][ T26] audit: type=1800 audit(1578462521.599:27): pid=9390 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 '10.128.0.100' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.227634][ T9542] kasan: CONFIG_KASAN_INLINE enabled [ 85.233099][ T9542] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 85.241187][ T9542] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 85.248115][ T9542] CPU: 1 PID: 9542 Comm: syz-executor555 Not tainted 5.5.0-rc5-syzkaller #0 [ 85.256798][ T9542] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.266881][ T9542] RIP: 0010:hash_ipportnet6_uadt+0x232/0xeb0 [ 85.272847][ T9542] 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 [ 85.292433][ T9542] RSP: 0018:ffffc90007f7f160 EFLAGS: 00010246 [ 85.298475][ T9542] RAX: dffffc0000000000 RBX: ffffc90007f7f320 RCX: 0000000000000000 [ 85.306424][ T9542] RDX: 0000000000000000 RSI: ffffffff867e0fff RDI: ffff8880986060d8 [ 85.314372][ T9542] RBP: ffffc90007f7f2b8 R08: 0000000000000000 R09: 0000000000000000 [ 85.322320][ T9542] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a6566f00 [ 85.330284][ T9542] R13: ffffc90007f7f1d0 R14: 0000000000000000 R15: 0000000007000000 [ 85.338232][ T9542] FS: 0000000002423880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 85.347135][ T9542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.353941][ T9542] CR2: 0000000020000022 CR3: 000000008b75d000 CR4: 00000000001406e0 [ 85.361912][ T9542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.369906][ T9542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.377858][ T9542] Call Trace: [ 85.381136][ T9542] ? hash_ipportnet_create+0xa60/0xa60 [ 85.386574][ T9542] ? hash_ipportnet6_same_set+0x1a0/0x1a0 [ 85.392278][ T9542] ? ip_set_utest+0x4aa/0x890 [ 85.396935][ T9542] ? __kasan_check_read+0x11/0x20 [ 85.401936][ T9542] ip_set_utest+0x55b/0x890 [ 85.406417][ T9542] ? ip_set_put_byindex+0x490/0x490 [ 85.411637][ T9542] ? __mutex_lock+0x458/0x13c0 [ 85.416389][ T9542] ? ip_set_put_byindex+0x490/0x490 [ 85.421562][ T9542] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 85.426479][ T9542] ? nfnetlink_bind+0x2c0/0x2c0 [ 85.431311][ T9542] ? __kasan_check_read+0x11/0x20 [ 85.436313][ T9542] ? __lock_acquire+0x8a0/0x4a00 [ 85.441228][ T9542] ? save_stack+0x5c/0x90 [ 85.445538][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.451775][ T9542] ? apparmor_capable+0x497/0x900 [ 85.456776][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.462992][ T9542] ? __kasan_check_read+0x11/0x20 [ 85.467991][ T9542] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 85.473436][ T9542] netlink_rcv_skb+0x177/0x450 [ 85.478188][ T9542] ? nfnetlink_bind+0x2c0/0x2c0 [ 85.483035][ T9542] ? netlink_ack+0xb50/0xb50 [ 85.487722][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.493988][ T9542] ? ns_capable_common+0x93/0x100 [ 85.498988][ T9542] ? ns_capable+0x20/0x30 [ 85.503305][ T9542] ? __netlink_ns_capable+0x104/0x140 [ 85.508660][ T9542] nfnetlink_rcv+0x1ba/0x460 [ 85.513274][ T9542] ? nfnetlink_rcv_batch+0x17a0/0x17a0 [ 85.518719][ T9542] ? netlink_deliver_tap+0x24a/0xbe0 [ 85.523993][ T9542] ? __kasan_check_write+0x14/0x20 [ 85.529092][ T9542] netlink_unicast+0x58c/0x7d0 [ 85.533839][ T9542] ? netlink_attachskb+0x870/0x870 [ 85.538927][ T9542] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 85.544639][ T9542] ? __check_object_size+0x3d/0x437 [ 85.549858][ T9542] netlink_sendmsg+0x91c/0xea0 [ 85.554606][ T9542] ? netlink_unicast+0x7d0/0x7d0 [ 85.559519][ T9542] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 85.565043][ T9542] ? apparmor_socket_sendmsg+0x2a/0x30 [ 85.570519][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.577692][ T9542] ? security_socket_sendmsg+0x8d/0xc0 [ 85.583129][ T9542] ? netlink_unicast+0x7d0/0x7d0 [ 85.588073][ T9542] sock_sendmsg+0xd7/0x130 [ 85.592472][ T9542] ____sys_sendmsg+0x753/0x880 [ 85.597216][ T9542] ? kernel_sendmsg+0x50/0x50 [ 85.601997][ T9542] ? lockdep_init_map+0x1be/0x6d0 [ 85.607003][ T9542] ___sys_sendmsg+0x100/0x170 [ 85.611744][ T9542] ? sendmsg_copy_msghdr+0x70/0x70 [ 85.616831][ T9542] ? __kasan_check_read+0x11/0x20 [ 85.621840][ T9542] ? __lock_acquire+0x8a0/0x4a00 [ 85.626760][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.632978][ T9542] ? __this_cpu_preempt_check+0x35/0x190 [ 85.638633][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.644853][ T9542] ? percpu_counter_add_batch+0x13c/0x190 [ 85.650547][ T9542] ? __fd_install+0x1bc/0x640 [ 85.655232][ T9542] ? find_held_lock+0x35/0x130 [ 85.659988][ T9542] ? __fd_install+0x1bc/0x640 [ 85.664646][ T9542] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.670977][ T9542] ? __fget_light+0x1a9/0x230 [ 85.675644][ T9542] ? __fdget+0x1b/0x20 [ 85.679692][ T9542] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 85.685909][ T9542] __sys_sendmsg+0x105/0x1d0 [ 85.690478][ T9542] ? __sys_sendmsg_sock+0xc0/0xc0 [ 85.695482][ T9542] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 85.700917][ T9542] ? do_syscall_64+0x26/0x790 [ 85.705589][ T9542] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.711645][ T9542] ? do_syscall_64+0x26/0x790 [ 85.716303][ T9542] __x64_sys_sendmsg+0x78/0xb0 [ 85.721043][ T9542] do_syscall_64+0xfa/0x790 [ 85.725524][ T9542] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.731388][ T9542] RIP: 0033:0x440f09 [ 85.735261][ T9542] 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 [ 85.754950][ T9542] RSP: 002b:00007fffdad1c3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 85.763338][ T9542] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440f09 [ 85.771286][ T9542] RDX: 0000000004000100 RSI: 0000000020000400 RDI: 0000000000000004 [ 85.779277][ T9542] RBP: 00000000006cb018 R08: 0000000000000006 R09: 00000000004002c8 [ 85.787356][ T9542] R10: 000000000000000c R11: 0000000000000246 R12: 0000000000402790 [ 85.795314][ T9542] R13: 0000000000402820 R14: 0000000000000000 R15: 0000000000000000 [ 85.803269][ T9542] Modules linked in: [ 85.807187][ T9542] ---[ end trace 060739182a3a3832 ]--- [ 85.812641][ T9542] RIP: 0010:hash_ipportnet6_uadt+0x232/0xeb0 [ 85.818630][ T9542] 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 [ 85.838247][ T9542] RSP: 0018:ffffc90007f7f160 EFLAGS: 00010246 [ 85.844323][ T9542] RAX: dffffc0000000000 RBX: ffffc90007f7f320 RCX: 0000000000000000 [ 85.852289][ T9542] RDX: 0000000000000000 RSI: ffffffff867e0fff RDI: ffff8880986060d8 [ 85.860269][ T9542] RBP: ffffc90007f7f2b8 R08: 0000000000000000 R09: 0000000000000000 [ 85.868292][ T9542] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880a6566f00 [ 85.876271][ T9542] R13: ffffc90007f7f1d0 R14: 0000000000000000 R15: 0000000007000000 [ 85.884258][ T9542] FS: 0000000002423880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 85.893301][ T9542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.899886][ T9542] CR2: 0000000020000022 CR3: 000000008b75d000 CR4: 00000000001406e0 [ 85.907862][ T9542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.915836][ T9542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.923811][ T9542] Kernel panic - not syncing: Fatal exception in interrupt [ 85.932269][ T9542] Kernel Offset: disabled [ 85.936604][ T9542] Rebooting in 86400 seconds..