===================================================== BUG: KMSAN: uninit-value in hash_net6_del+0xa54/0x23e0 net/netfilter/ipset/ip_set_hash_gen.h:1069 CPU: 0 PID: 23306 Comm: syz-executor.5 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+0x1df/0x240 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_del+0xa54/0x23e0 net/netfilter/ipset/ip_set_hash_gen.h:1069 hash_net6_uadt+0xab6/0xd80 net/netfilter/ipset/ip_set_hash_net.c:343 call_ad+0x2dc/0xbc0 net/netfilter/ipset/ip_set_core.c:1734 ip_set_ad+0xed8/0x1110 net/netfilter/ipset/ip_set_core.c:1833 ip_set_udel+0xf9/0x110 net/netfilter/ipset/ip_set_core.c:1856 nfnetlink_rcv_msg+0xb86/0xcf0 net/netfilter/nfnetlink.c:230 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x3b5/0x3ad0 net/netfilter/nfnetlink.c:564 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x1370/0x1400 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2439 __compat_sys_sendmsg net/compat.c:466 [inline] __do_compat_sys_sendmsg net/compat.c:473 [inline] __se_compat_sys_sendmsg+0xa7/0xc0 net/compat.c:470 __ia32_compat_sys_sendmsg+0x4a/0x70 net/compat.c:470 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f4e549 Code: Bad RIP value. RSP: 002b:00000000f55480cc EFLAGS: 00000296 ORIG_RAX: 0000000000000172 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000200001c0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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+0x9a8/0xd80 net/netfilter/ipset/ip_set_hash_net.c:334 call_ad+0x2dc/0xbc0 net/netfilter/ipset/ip_set_core.c:1734 ip_set_ad+0xed8/0x1110 net/netfilter/ipset/ip_set_core.c:1833 ip_set_udel+0xf9/0x110 net/netfilter/ipset/ip_set_core.c:1856 nfnetlink_rcv_msg+0xb86/0xcf0 net/netfilter/nfnetlink.c:230 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x3b5/0x3ad0 net/netfilter/nfnetlink.c:564 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x1370/0x1400 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2439 __compat_sys_sendmsg net/compat.c:466 [inline] __do_compat_sys_sendmsg net/compat.c:473 [inline] __se_compat_sys_sendmsg+0xa7/0xc0 net/compat.c:470 __ia32_compat_sys_sendmsg+0x4a/0x70 net/compat.c:470 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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+0x26a/0x300 net/netfilter/ipset/ip_set_core.c:325 hash_net6_uadt+0x4a6/0xd80 net/netfilter/ipset/ip_set_hash_net.c:320 call_ad+0x2dc/0xbc0 net/netfilter/ipset/ip_set_core.c:1734 ip_set_ad+0xed8/0x1110 net/netfilter/ipset/ip_set_core.c:1833 ip_set_udel+0xf9/0x110 net/netfilter/ipset/ip_set_core.c:1856 nfnetlink_rcv_msg+0xb86/0xcf0 net/netfilter/nfnetlink.c:230 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2469 nfnetlink_rcv+0x3b5/0x3ad0 net/netfilter/nfnetlink.c:564 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x1370/0x1400 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2439 __compat_sys_sendmsg net/compat.c:466 [inline] __do_compat_sys_sendmsg net/compat.c:473 [inline] __se_compat_sys_sendmsg+0xa7/0xc0 net/compat.c:470 __ia32_compat_sys_sendmsg+0x4a/0x70 net/compat.c:470 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c 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+0xb40/0x1200 mm/slub.c:4478 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2fd/0xac0 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+0x7d3/0x14d0 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x1370/0x1400 net/socket.c:2352 ___sys_sendmsg net/socket.c:2406 [inline] __sys_sendmsg+0x623/0x750 net/socket.c:2439 __compat_sys_sendmsg net/compat.c:466 [inline] __do_compat_sys_sendmsg net/compat.c:473 [inline] __se_compat_sys_sendmsg+0xa7/0xc0 net/compat.c:470 __ia32_compat_sys_sendmsg+0x4a/0x70 net/compat.c:470 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2aa/0x400 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c =====================================================