[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 31.461666] audit: type=1800 audit(1538696790.062:25): pid=5861 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 31.486658] audit: type=1800 audit(1538696790.062:26): pid=5861 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 31.511011] audit: type=1800 audit(1538696790.062:27): pid=5861 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 '10.128.10.19' (ECDSA) to the list of known hosts. syzkaller login: [ 43.243219] IPVS: ftp: loaded support on port[0] = 21 [ 43.366477] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.372983] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.379822] device bridge_slave_0 entered promiscuous mode [ 43.394192] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.400870] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.407899] device bridge_slave_1 entered promiscuous mode [ 43.421723] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 43.437188] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 43.475371] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 43.492462] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.548730] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.555921] team0: Port device team_slave_0 added [ 43.569672] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.576675] team0: Port device team_slave_1 added [ 43.590456] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.606215] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.622211] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.638664] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 43.745970] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.752355] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.759008] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.765342] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 44.155352] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 44.161689] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.201669] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.243426] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.250688] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 44.283949] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 44.290428] 8021q: adding VLAN 0 to HW filter on device team0 [ 44.317074] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 44.506258] nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. [ 44.525092] kasan: CONFIG_KASAN_INLINE enabled [ 44.529899] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.537284] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.543504] CPU: 0 PID: 6015 Comm: syz-executor196 Not tainted 4.19.0-rc6-next-20181004+ #87 [ 44.552062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.561403] RIP: 0010:__handle_mm_fault+0x2d72/0x55c0 [ 44.566631] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 20 00 00 49 8b 9c 24 b0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 57 20 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de [ 44.585530] RSP: 0018:ffff8801bbe66fc0 EFLAGS: 00010246 [ 44.590884] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8160f791 [ 44.598143] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801bbe670f8 [ 44.605400] RBP: ffff8801bbe67270 R08: ffffed0039d485ae R09: ffffed0039d485ad [ 44.612662] R10: ffffed0039d485ad R11: ffff8801cea42d6b R12: ffff8801bbe67248 [ 44.619913] R13: ffff8801bbc7e800 R14: ffff8801d1759f40 R15: 0000000000000067 [ 44.627162] FS: 0000000001c6a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 44.635380] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.641249] CR2: 0000000020077000 CR3: 00000001d79be000 CR4: 00000000001406f0 [ 44.648544] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.655805] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.663054] Call Trace: [ 44.665627] ? vmf_insert_mixed_mkwrite+0x40/0x40 [ 44.670457] ? is_bpf_text_address+0xd3/0x170 [ 44.674937] ? kernel_text_address+0x79/0xf0 [ 44.679326] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.684843] ? should_fail+0x22d/0xd01 [ 44.688817] ? handle_mm_fault+0x42a/0xc70 [ 44.693051] ? lock_downgrade+0x900/0x900 [ 44.697286] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 44.702204] ? trace_user_stack_print+0x3e0/0x6b0 [ 44.707026] ? tcp_sendmsg+0x2f/0x50 [ 44.710722] ? __do_page_fault+0x567/0xd10 [ 44.715044] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 44.720486] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.726008] ? check_preemption_disabled+0x48/0x200 [ 44.731006] ? fs_reclaim_acquire+0x20/0x20 [ 44.735311] handle_mm_fault+0x54f/0xc70 [ 44.739414] ? __handle_mm_fault+0x55c0/0x55c0 [ 44.743990] ? find_vma+0x34/0x190 [ 44.747511] __do_page_fault+0x567/0xd10 [ 44.751554] do_page_fault+0xed/0x7d1 [ 44.755339] ? __alloc_pages_slowpath+0x2de0/0x2de0 [ 44.760335] ? vmalloc_sync_all+0x30/0x30 [ 44.764463] ? error_entry+0x76/0xd0 [ 44.768156] ? trace_hardirqs_off_caller+0xbb/0x300 [ 44.773151] ? trace_hardirqs_on_caller+0xc0/0x310 [ 44.778062] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.782888] ? trace_hardirqs_on_caller+0x310/0x310 [ 44.787884] ? trace_hardirqs_off+0x310/0x310 [ 44.792470] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.797999] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.802823] page_fault+0x1e/0x30 [ 44.806264] RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 [ 44.812132] Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 83 [ 44.831030] RSP: 0018:ffff8801bbe675b8 EFLAGS: 00010202 [ 44.836378] RAX: 0000000000000000 RBX: 0000000000007a50 RCX: 0000000000001b40 [ 44.843635] RDX: 0000000000007a50 RSI: 0000000020077000 RDI: ffff8801ce615f10 [ 44.850887] RBP: ffff8801bbe675f0 R08: ffffed0039cc2f4a R09: ffffed0039cc2f4a [ 44.858142] R10: ffffed0039cc2f49 R11: ffff8801ce617a4f R12: 0000000020078b40 [ 44.865401] R13: 00000000200710f0 R14: ffff8801ce610000 R15: 00007ffffffff000 [ 44.872675] ? copyin+0xe4/0x100 [ 44.876044] _copy_from_iter_full+0x263/0xc20 [ 44.880524] ? tcp_chrono_start+0x190/0x1e0 [ 44.884829] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 44.889825] ? tcp_rate_check_app_limited+0x121/0x460 [ 44.894997] ? iov_iter_advance+0x1370/0x1370 [ 44.899598] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.905125] ? __sk_mem_schedule+0xac/0xe0 [ 44.909356] tcp_sendmsg_locked+0x159e/0x3f90 [ 44.913844] ? tcp_sendpage+0x60/0x60 [ 44.917630] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 44.923153] ? aa_label_sk_perm+0xfc/0xa50 [ 44.927380] ? __release_sock+0x267/0x3a0 [ 44.931526] ? aa_profile_af_perm+0x410/0x410 [ 44.936129] ? remove_wait_queue+0x1a6/0x360 [ 44.940624] ? lock_acquire+0x1ed/0x520 [ 44.944586] ? tcp_sendmsg+0x21/0x50 [ 44.948291] ? trace_hardirqs_on+0xbd/0x310 [ 44.952642] ? lock_release+0x970/0x970 [ 44.956603] ? lock_sock_nested+0xe2/0x120 [ 44.960819] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 44.966254] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.971796] ? check_preemption_disabled+0x48/0x200 [ 44.976792] ? lock_sock_nested+0x9a/0x120 [ 44.981006] ? lock_sock_nested+0x9a/0x120 [ 44.985234] ? __local_bh_enable_ip+0x160/0x260 [ 44.989883] tcp_sendmsg+0x2f/0x50 [ 44.993413] inet_sendmsg+0x19c/0x690 [ 44.997208] ? ipip_gro_receive+0x100/0x100 [ 45.001512] ? apparmor_socket_sendmsg+0x29/0x30 [ 45.006387] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.011919] ? security_socket_sendmsg+0x94/0xc0 [ 45.016656] ? ipip_gro_receive+0x100/0x100 [ 45.021086] sock_sendmsg+0xd5/0x120 [ 45.024911] __sys_sendto+0x3d7/0x670 [ 45.028792] ? release_sock+0x1ec/0x2c0 [ 45.032752] ? __ia32_sys_getpeername+0xb0/0xb0 [ 45.037402] ? inet_stream_connect+0x7b/0xa0 [ 45.041798] ? __sys_connect+0x1d1/0x4c0 [ 45.045843] ? kasan_check_write+0x14/0x20 [ 45.050063] ? up_read+0x225/0x2c0 [ 45.053591] ? up_read_non_owner+0x100/0x100 [ 45.057984] ? find_vma+0x34/0x190 [ 45.061557] ? trace_hardirqs_on+0xbd/0x310 [ 45.065866] ? move_addr_to_kernel+0x70/0x70 [ 45.070258] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.075608] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 45.081044] __x64_sys_sendto+0xe1/0x1a0 [ 45.085090] do_syscall_64+0x1b9/0x820 [ 45.088960] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 45.094418] ? syscall_return_slowpath+0x5e0/0x5e0 [ 45.099340] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.104178] ? trace_hardirqs_on_caller+0x310/0x310 [ 45.109223] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 45.114230] ? prepare_exit_to_usermode+0x291/0x3b0 [ 45.119234] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.124096] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.129278] RIP: 0033:0x441159 [ 45.132458] 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 db 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 45.151347] RSP: 002b:00007ffc1def2948 EFLAGS: 00000217 ORIG_RAX: 000000000000002c [ 45.159048] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441159 [ 45.166300] RDX: fffffffffffffee3 RSI: 0000000020000b40 RDI: 0000000000000003 [ 45.173569] RBP: 00000000006cc018 R08: 0000000000000000 R09: ffffffffffffff61 [ 45.180819] R10: 00000000040000cb R11: 0000000000000217 R12: 00000000004020c0 [ 45.188078] R13: 0000000000402150 R14: 0000000000000000 R15: 0000000000000000 [ 45.195346] Modules linked in: [ 45.198620] ---[ end trace d2b868b55677c602 ]--- [ 45.203399] RIP: 0010:__handle_mm_fault+0x2d72/0x55c0 [ 45.208641] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 20 00 00 49 8b 9c 24 b0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 57 20 00 00 48 8b 1b 31 ff 48 83 e3 9f 48 89 de [ 45.227591] RSP: 0018:ffff8801bbe66fc0 EFLAGS: 00010246 [ 45.232951] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff8160f791 [ 45.240262] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801bbe670f8 [ 45.247551] RBP: ffff8801bbe67270 R08: ffffed0039d485ae R09: ffffed0039d485ad [ 45.254821] R10: ffffed0039d485ad R11: ffff8801cea42d6b R12: ffff8801bbe67248 [ 45.262117] R13: ffff8801bbc7e800 R14: ffff8801d1759f40 R15: 0000000000000067 [ 45.269414] FS: 0000000001c6a880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 45.277661] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.283542] CR2: 0000000020077000 CR3: 00000001d79be000 CR4: 00000000001406f0 [ 45.290862] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.298154] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.305441] Kernel panic - not syncing: Fatal exception [ 45.311803] Kernel Offset: disabled [ 45.315430] Rebooting in 86400 seconds..