[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 33.283638] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 37.322629] random: sshd: uninitialized urandom read (32 bytes read) [ 37.693945] random: sshd: uninitialized urandom read (32 bytes read) [ 39.106513] random: sshd: uninitialized urandom read (32 bytes read) [ 66.728565] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.195' (ECDSA) to the list of known hosts. [ 72.294715] random: sshd: uninitialized urandom read (32 bytes read) [ 72.445914] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 72.779149] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.785717] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.793654] device bridge_slave_0 entered promiscuous mode [ 72.817636] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.824074] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.831385] device bridge_slave_1 entered promiscuous mode [ 72.855306] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 72.879248] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 72.908765] ip (4622) used greatest stack depth: 53504 bytes left [ 72.947257] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 72.976573] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 73.078785] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 73.086175] team0: Port device team_slave_0 added [ 73.108743] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 73.115992] team0: Port device team_slave_1 added [ 73.138965] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.164751] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.190991] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 73.217365] 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 [ 73.425285] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.431716] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.438560] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.444977] 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 [ 74.286749] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.365492] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 74.442157] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 74.448405] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 74.456890] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.528687] 8021q: adding VLAN 0 to HW filter on device team0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 83.214648] list_del corruption. prev->next should be ffff88019b9af810, but was 000000009b9af810 [ 83.223784] ------------[ cut here ]------------ [ 83.228611] kernel BUG at lib/list_debug.c:53! [ 83.233405] invalid opcode: 0000 [#1] SMP PTI [ 83.238017] CPU: 0 PID: 4579 Comm: syz-executor079 Not tainted 4.18.0-rc4+ #26 [ 83.245376] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.254901] RIP: 0010:__list_del_entry_valid+0x37c/0x440 [ 83.260342] Code: 48 c7 81 80 0c 00 00 00 00 00 00 c7 81 20 03 00 00 00 00 00 00 48 c7 c7 2e f7 dc 8a 31 c0 48 8b 75 c0 4c 89 e2 e8 a4 ab 2b fd <0f> 0b 66 90 eb fe 44 89 f7 e8 26 60 ae fd e9 88 fd ff ff 48 85 db [ 83.279692] RSP: 0018:ffff880197e3f780 EFLAGS: 00010246 [ 83.285082] RAX: 0000000000000054 RBX: 0000000000000000 RCX: d9ea9bfe352ded00 [ 83.292378] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000cbe9440 [ 83.299670] RBP: ffff880197e3f7d8 R08: 0000000000480020 R09: 0000000000000002 [ 83.306947] R10: 0000000000000000 R11: ffffffff8675b580 R12: 000000009b9af810 [ 83.314229] R13: ffff88018abb8270 R14: 00000000ad8000b0 R15: 00000000c32000b1 [ 83.321518] FS: 000000000110b940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 83.329761] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.335653] CR2: 00000000006d1118 CR3: 00000001c2668000 CR4: 00000000001406f0 [ 83.342946] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.350231] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.357500] Call Trace: [ 83.360124] __free_vmap_area+0x2f5/0x650 [ 83.364284] __purge_vmap_area_lazy+0x2c1/0x3b0 [ 83.368977] free_vmap_area_noflush+0x1fa/0x230 [ 83.373658] remove_vm_area+0x3b9/0x460 [ 83.377635] __vunmap+0x34c/0x5d0 [ 83.381105] vfree+0x79/0x170 [ 83.384241] do_ipt_get_ctl+0x1150/0x11e0 [ 83.388419] ? compat_do_ipt_set_ctl+0x3df0/0x3df0 [ 83.393387] nf_getsockopt+0x481/0x4e0 [ 83.397297] ip_getsockopt+0x297/0x3f0 [ 83.401228] ? compat_ip_setsockopt+0x380/0x380 [ 83.405923] tcp_getsockopt+0x1c6/0x1f0 [ 83.409926] ? tcp_get_timestamping_opt_stats+0x14c0/0x14c0 [ 83.415663] sock_common_getsockopt+0x13f/0x180 [ 83.420338] ? sock_recv_errqueue+0x9d0/0x9d0 [ 83.424836] __sys_getsockopt+0x48c/0x550 [ 83.429039] __x64_sys_getsockopt+0x15d/0x1c0 [ 83.433578] ? __ia32_sys_setsockopt+0x1c0/0x1c0 [ 83.438446] do_syscall_64+0x15b/0x230 [ 83.442361] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 83.447556] RIP: 0033:0x44766a [ 83.450738] Code: b8 10 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1d d6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 fa d5 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 83.470082] RSP: 002b:00000000007ef698 EFLAGS: 00000216 ORIG_RAX: 0000000000000037 [ 83.477815] RAX: ffffffffffffffda RBX: 00000000006d4d40 RCX: 000000000044766a [ 83.485098] RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 [ 83.492397] RBP: 00000000006d4d40 R08: 00000000007ef6bc R09: 0000000000004000 [ 83.499775] R10: 00000000007ef7c0 R11: 0000000000000216 R12: 0000000000000003 [ 83.507045] R13: 00000000007ef7c0 R14: 00000000007ef6c0 R15: 0000000000000000 [ 83.514324] Modules linked in: [ 83.517528] Dumping ftrace buffer: [ 83.521067] (ftrace buffer empty) [ 83.524968] ---[ end trace 46e1ffa8321b0cf6 ]--- [ 83.529859] RIP: 0010:__list_del_entry_valid+0x37c/0x440 [ 83.535402] Code: 48 c7 81 80 0c 00 00 00 00 00 00 c7 81 20 03 00 00 00 00 00 00 48 c7 c7 2e f7 dc 8a 31 c0 48 8b 75 c0 4c 89 e2 e8 a4 ab 2b fd <0f> 0b 66 90 eb fe 44 89 f7 e8 26 60 ae fd e9 88 fd ff ff 48 85 db [ 83.555093] RSP: 0018:ffff880197e3f780 EFLAGS: 00010246 [ 83.560542] RAX: 0000000000000054 RBX: 0000000000000000 RCX: d9ea9bfe352ded00 [ 83.567898] RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000cbe9440 [ 83.575436] RBP: ffff880197e3f7d8 R08: 0000000000480020 R09: 0000000000000002 [ 83.582797] R10: 0000000000000000 R11: ffffffff8675b580 R12: 000000009b9af810 [ 83.590170] R13: ffff88018abb8270 R14: 00000000ad8000b0 R15: 00000000c32000b1 [ 83.597537] FS: 000000000110b940(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000 [ 83.605849] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.611803] CR2: 00000000006d1118 CR3: 00000001c2668000 CR4: 00000000001406f0 [ 83.619311] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.626695] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.634082] Kernel panic - not syncing: Fatal exception [ 83.640175] Dumping ftrace buffer: [ 83.643713] (ftrace buffer empty) [ 83.647415] Kernel Offset: disabled [ 83.651044] Rebooting in 86400 seconds..