================================================================== BUG: KASAN: slab-out-of-bounds in clusterip_config_init_nodelist net/ipv4/netfilter/ipt_CLUSTERIP.c:172 [inline] BUG: KASAN: slab-out-of-bounds in clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:227 [inline] BUG: KASAN: slab-out-of-bounds in clusterip_tg_check+0x150f/0x1570 net/ipv4/netfilter/ipt_CLUSTERIP.c:478 Read of size 2 at addr ffff8801c060f058 by task syz-executor5/11604 CPU: 1 PID: 11604 Comm: syz-executor5 Not tainted 4.15.0-rc9+ #215 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:428 clusterip_config_init_nodelist net/ipv4/netfilter/ipt_CLUSTERIP.c:172 [inline] clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:227 [inline] clusterip_tg_check+0x150f/0x1570 net/ipv4/netfilter/ipt_CLUSTERIP.c:478 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv4/netfilter/ip_tables.c:518 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:559 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:730 do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline] do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1680 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f33b2072c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000000003f R08: 00000000000002f8 R09: 0000000000000000 R10: 000000002000b000 R11: 0000000000000212 R12: 00000000006ef688 R13: 00000000ffffffff R14: 00007f33b20736d4 R15: 0000000000000000 Allocated by task 11604: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3672 [inline] __kmalloc_node+0x47/0x70 mm/slab.c:3679 kmalloc_node include/linux/slab.h:541 [inline] kvmalloc_node+0x99/0xd0 mm/util.c:397 kvmalloc include/linux/mm.h:541 [inline] xt_alloc_table_info+0x64/0xe0 net/netfilter/x_tables.c:1006 do_replace net/ipv4/netfilter/ip_tables.c:1135 [inline] do_ipt_set_ctl+0x29b/0x5f0 net/ipv4/netfilter/ip_tables.c:1680 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 Freed by task 7696: save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3488 [inline] kfree+0xd6/0x260 mm/slab.c:3803 skb_free_head+0x74/0xb0 net/core/skbuff.c:550 skb_release_data+0x58c/0x790 net/core/skbuff.c:570 skb_release_all+0x4a/0x60 net/core/skbuff.c:627 __kfree_skb+0x15/0x20 net/core/skbuff.c:641 sk_wmem_free_skb include/net/sock.h:1417 [inline] tcp_rtx_queue_unlink_and_free include/net/tcp.h:1674 [inline] tcp_clean_rtx_queue net/ipv4/tcp_input.c:3121 [inline] tcp_ack+0x1bad/0x51a0 net/ipv4/tcp_input.c:3615 tcp_rcv_established+0x8d1/0x1be0 net/ipv4/tcp_input.c:5465 tcp_v4_do_rcv+0x2ab/0x7d0 net/ipv4/tcp_ipv4.c:1468 sk_backlog_rcv include/net/sock.h:908 [inline] __release_sock+0x124/0x360 net/core/sock.c:2274 __sk_flush_backlog+0x27/0x40 net/core/sock.c:2294 sk_flush_backlog include/net/sock.h:995 [inline] tcp_sendmsg_locked+0x17f7/0x3c70 net/ipv4/tcp.c:1295 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1463 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 entry_SYSCALL_64_fastpath+0x29/0xa0 The buggy address belongs to the object at ffff8801c060ed80 which belongs to the cache kmalloc-1024 of size 1024 The buggy address is located 728 bytes inside of 1024-byte region [ffff8801c060ed80, ffff8801c060f180) The buggy address belongs to the page: page:ffffea0007018380 count:1 mapcount:0 mapping:ffff8801c060e000 index:0x0 compound_mapcount: 0 flags: 0x2fffc0000008100(slab|head) raw: 02fffc0000008100 ffff8801c060e000 0000000000000000 0000000100000007 raw: ffffea00070a9f20 ffffea00070a14a0 ffff8801db000ac0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c060ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801c060ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801c060f000: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ^ ffff8801c060f080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801c060f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================