================================================================== BUG: KMSAN: uninit-value in __read_once_size include/linux/compiler.h:197 [inline] BUG: KMSAN: uninit-value in hlist_empty include/linux/list.h:641 [inline] BUG: KMSAN: uninit-value in sk_head include/net/sock.h:551 [inline] BUG: KMSAN: uninit-value in raw6_local_deliver+0x259/0x1ac0 net/ipv6/raw.c:239 CPU: 0 PID: 5705 Comm: syz-executor1 Not tainted 4.16.0+ #84 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+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 __read_once_size include/linux/compiler.h:197 [inline] hlist_empty include/linux/list.h:641 [inline] sk_head include/net/sock.h:551 [inline] raw6_local_deliver+0x259/0x1ac0 net/ipv6/raw.c:239 ip6_input_finish+0x55c/0x2110 net/ipv6/ip6_input.c:246 NF_HOOK include/linux/netfilter.h:288 [inline] ip6_input net/ipv6/ip6_input.c:327 [inline] ip6_mc_input+0x697/0x740 net/ipv6/ip6_input.c:404 dst_input include/net/dst.h:449 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:71 [inline] NF_HOOK include/linux/netfilter.h:288 [inline] ipv6_rcv+0x20ec/0x26d0 net/ipv6/ip6_input.c:208 __netif_receive_skb_core+0x47cf/0x4a80 net/core/dev.c:4562 __netif_receive_skb net/core/dev.c:4627 [inline] process_backlog+0x62d/0xe20 net/core/dev.c:5307 napi_poll net/core/dev.c:5705 [inline] net_rx_action+0x7c1/0x1a70 net/core/dev.c:5771 __do_softirq+0x56d/0x93d kernel/softirq.c:285 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1040 do_softirq+0xb6/0xf0 kernel/softirq.c:329 netif_rx_ni net/core/dev.c:4192 [inline] dev_loopback_xmit+0x8b0/0x900 net/core/dev.c:3320 NF_HOOK include/linux/netfilter.h:288 [inline] ip6_finish_output2+0x5e6/0x1f20 net/ipv6/ip6_output.c:84 ip6_fragment+0x32e6/0x5150 net/ipv6/ip6_output.c:740 ip6_finish_output+0x96c/0xc00 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip6_output+0x597/0x6c0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:443 [inline] ip6_local_out+0x573/0x640 net/ipv6/output_core.c:176 ip6_send_skb+0xfa/0x380 net/ipv6/ip6_output.c:1682 udp_v6_send_skb+0x116a/0x1880 net/ipv6/udp.c:1044 udp_v6_push_pending_frames+0x248/0x340 net/ipv6/udp.c:1077 udp_lib_setsockopt+0x4c9/0xad0 net/ipv4/udp.c:2331 udpv6_setsockopt+0x1aa/0x1c0 net/ipv6/udp.c:1420 sock_common_setsockopt+0x136/0x170 net/core/sock.c:2975 SYSC_setsockopt+0x4b8/0x570 net/socket.c:1849 SyS_setsockopt+0x76/0xa0 net/socket.c:1828 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x455329 RSP: 002b:00007fc060096c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fc0600976d4 RCX: 0000000000455329 RDX: 0000000000000001 RSI: 0000000000000011 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000004 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000563 R14: 00000000006fb1e8 R15: 0000000000000000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:526 kmsan_memmove_origins+0x9/0x10 mm/kmsan/kmsan.c:581 __msan_memmove+0xda/0x130 mm/kmsan/kmsan_instr.c:416 ip6_frag_reasm net/ipv6/reassembly.c:462 [inline] ip6_frag_queue net/ipv6/reassembly.c:358 [inline] ipv6_frag_rcv+0x5055/0x6970 net/ipv6/reassembly.c:569 ip6_input_finish+0xa62/0x2110 net/ipv6/ip6_input.c:284 NF_HOOK include/linux/netfilter.h:288 [inline] ip6_input net/ipv6/ip6_input.c:327 [inline] ip6_mc_input+0x697/0x740 net/ipv6/ip6_input.c:404 dst_input include/net/dst.h:449 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:71 [inline] NF_HOOK include/linux/netfilter.h:288 [inline] ipv6_rcv+0x20ec/0x26d0 net/ipv6/ip6_input.c:208 __netif_receive_skb_core+0x47cf/0x4a80 net/core/dev.c:4562 __netif_receive_skb net/core/dev.c:4627 [inline] process_backlog+0x62d/0xe20 net/core/dev.c:5307 napi_poll net/core/dev.c:5705 [inline] net_rx_action+0x7c1/0x1a70 net/core/dev.c:5771 __do_softirq+0x56d/0x93d kernel/softirq.c:285 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314 kmsan_slab_alloc+0x11/0x20 mm/kmsan/kmsan.c:321 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slub.c:2737 [inline] __kmalloc_node_track_caller+0xaed/0x11c0 mm/slub.c:4369 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x2cf/0x9f0 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:984 [inline] alloc_skb_with_frags+0x1d4/0xb20 net/core/skbuff.c:5234 sock_alloc_send_pskb+0xb56/0x1190 net/core/sock.c:2085 sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2102 __ip6_append_data+0x3387/0x4bb0 net/ipv6/ip6_output.c:1414 ip6_append_data+0x40e/0x6b0 net/ipv6/ip6_output.c:1576 udpv6_sendmsg+0xfd5/0x45b0 net/ipv6/udp.c:1337 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] ___sys_sendmsg+0xec0/0x1310 net/socket.c:2046 __sys_sendmsg net/socket.c:2080 [inline] SYSC_sendmsg+0x2a3/0x3d0 net/socket.c:2091 SyS_sendmsg+0x54/0x80 net/socket.c:2087 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 ==================================================================