random: sshd: uninitialized urandom read (32 bytes read) random: cc1: uninitialized urandom read (8 bytes read) IPVS: ftp: loaded support on port[0] = 21 list_del corruption. prev->next should be ffff8801a9d8a090, but was 00000000a9d8a090 ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:53! invalid opcode: 0000 [#1] SMP PTI CPU: 1 PID: 4604 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #27 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_del_entry_valid+0x37c/0x440 lib/list_debug.c:51 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 ce f6 dc 8a 31 c0 48 8b 75 c0 4c 89 e2 e8 64 ae 2b fd <0f> 0b 66 90 eb fe 44 89 f7 e8 16 60 ae fd e9 88 fd ff ff 48 85 db RSP: 0018:ffff8801bdaef780 EFLAGS: 00010246 RAX: 0000000000000054 RBX: 0000000000000000 RCX: a965be8df16a4300 RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000cbef440 RBP: ffff8801bdaef7d8 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff8675b2c0 R12: 00000000a9d8a090 R13: ffff8801d0286870 R14: 00000000984000a6 R15: 0000000083e000a9 FS: 000000000150e940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000702138 CR3: 000000019ce28000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:117 [inline] list_del_rcu include/linux/rculist.h:130 [inline] __free_vmap_area+0x2f5/0x650 mm/vmalloc.c:575 __purge_vmap_area_lazy+0x2c1/0x3b0 mm/vmalloc.c:683 try_purge_vmap_area_lazy mm/vmalloc.c:698 [inline] free_vmap_area_noflush+0x1fa/0x230 mm/vmalloc.c:730 free_unmap_vmap_area mm/vmalloc.c:743 [inline] remove_vm_area+0x3b9/0x460 mm/vmalloc.c:1491 __vunmap+0x34c/0x5d0 mm/vmalloc.c:1519 vfree+0x79/0x170 mm/vmalloc.c:1594 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:870 [inline] get_entries net/ipv4/netfilter/ip_tables.c:1027 [inline] do_ipt_get_ctl+0x1150/0x11e0 net/ipv4/netfilter/ip_tables.c:1703 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x481/0x4e0 net/netfilter/nf_sockopt.c:122 ip_getsockopt+0x297/0x3f0 net/ipv4/ip_sockglue.c:1574 tcp_getsockopt+0x1c6/0x1f0 net/ipv4/tcp.c:3545 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2999 __sys_getsockopt+0x48c/0x550 net/socket.c:1948 __do_sys_getsockopt net/socket.c:1959 [inline] __se_sys_getsockopt net/socket.c:1956 [inline] __x64_sys_getsockopt+0x15d/0x1c0 net/socket.c:1956 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x4585aa Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1d 8f 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 8e fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:0000000000a3e328 EFLAGS: 00000202 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000a3e350 RCX: 00000000004585aa RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000707f20 R08: 0000000000a3e34c R09: 0000000000004000 R10: 0000000000a3e450 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000706420 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 8da8d135aeb93b7b ]--- RIP: 0010:__list_del_entry_valid+0x37c/0x440 lib/list_debug.c:51 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 ce f6 dc 8a 31 c0 48 8b 75 c0 4c 89 e2 e8 64 ae 2b fd <0f> 0b 66 90 eb fe 44 89 f7 e8 16 60 ae fd e9 88 fd ff ff 48 85 db RSP: 0018:ffff8801bdaef780 EFLAGS: 00010246 RAX: 0000000000000054 RBX: 0000000000000000 RCX: a965be8df16a4300 RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000cbef440 RBP: ffff8801bdaef7d8 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff8675b2c0 R12: 00000000a9d8a090 R13: ffff8801d0286870 R14: 00000000984000a6 R15: 0000000083e000a9 FS: 000000000150e940(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000702138 CR3: 000000019ce28000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400