===================================================== BUG: KMSAN: uninit-value in hash_net6_add+0x18cb/0x4c10 net/netfilter/ipset/ip_set_hash_gen.h:892 CPU: 1 PID: 24849 Comm: syz-executor.4 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 hash_net6_add+0x18cb/0x4c10 net/netfilter/ipset/ip_set_hash_gen.h:892 hash_net6_uadt+0xb48/0xf80 net/netfilter/ipset/ip_set_hash_net.c:343 call_ad+0x329/0xd00 net/netfilter/ipset/ip_set_core.c:1734 ip_set_ad+0x10df/0x1400 net/netfilter/ipset/ip_set_core.c:1822 ip_set_uadd+0xf6/0x110 net/netfilter/ipset/ip_set_core.c:1847 nfnetlink_rcv_msg+0xc68/0xdc0 net/netfilter/nfnetlink.c:230 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x4fa/0x3f60 net/netfilter/nfnetlink.c:564 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xc82/0x1240 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x6d1/0x840 net/socket.c:2439 __do_sys_sendmsg net/socket.c:2448 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2446 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2446 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d579 Code: Bad RIP value. RSP: 002b:00007f062dddac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000029540 RCX: 000000000045d579 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 000000000169fb6f R14: 00007f062dddb9c0 R15: 000000000118cf4c Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 __msan_chain_origin+0x50/0x90 mm/kmsan/kmsan_instr.c:165 ip6_netmask include/linux/netfilter/ipset/pfxlen.h:49 [inline] hash_net6_uadt+0xa36/0xf80 net/netfilter/ipset/ip_set_hash_net.c:334 call_ad+0x329/0xd00 net/netfilter/ipset/ip_set_core.c:1734 ip_set_ad+0x10df/0x1400 net/netfilter/ipset/ip_set_core.c:1822 ip_set_uadd+0xf6/0x110 net/netfilter/ipset/ip_set_core.c:1847 nfnetlink_rcv_msg+0xc68/0xdc0 net/netfilter/nfnetlink.c:230 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x4fa/0x3f60 net/netfilter/nfnetlink.c:564 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xc82/0x1240 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x6d1/0x840 net/socket.c:2439 __do_sys_sendmsg net/socket.c:2448 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2446 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2446 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116 ip_set_get_ipaddr6+0x2cb/0x370 net/netfilter/ipset/ip_set_core.c:325 hash_net6_uadt+0x4dc/0xf80 net/netfilter/ipset/ip_set_hash_net.c:320 call_ad+0x329/0xd00 net/netfilter/ipset/ip_set_core.c:1734 ip_set_ad+0x10df/0x1400 net/netfilter/ipset/ip_set_core.c:1822 ip_set_uadd+0xf6/0x110 net/netfilter/ipset/ip_set_core.c:1847 nfnetlink_rcv_msg+0xc68/0xdc0 net/netfilter/nfnetlink.c:230 netlink_rcv_skb+0x6d7/0x7e0 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x4fa/0x3f60 net/netfilter/nfnetlink.c:564 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x11c8/0x1490 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x173a/0x1840 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xc82/0x1240 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x6d1/0x840 net/socket.c:2439 __do_sys_sendmsg net/socket.c:2448 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2446 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2446 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127 kmsan_slab_alloc+0x8a/0xe0 mm/kmsan/kmsan_hooks.c:80 slab_alloc_node mm/slub.c:2839 [inline] __kmalloc_node_track_caller+0xeab/0x12e0 mm/slub.c:4478 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x35f/0xb30 net/core/skbuff.c:210 alloc_skb include/linux/skbuff.h:1083 [inline] netlink_alloc_large_skb net/netlink/af_netlink.c:1175 [inline] netlink_sendmsg+0xdb9/0x1840 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0xc82/0x1240 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x6d1/0x840 net/socket.c:2439 __do_sys_sendmsg net/socket.c:2448 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2446 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2446 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================