===================================================== BUG: KMSAN: uninit-value in udplite_error net/netfilter/nf_conntrack_proto_udp.c:162 [inline] BUG: KMSAN: uninit-value in nf_conntrack_udplite_packet+0x6cc/0x12d0 net/netfilter/nf_conntrack_proto_udp.c:188 CPU: 1 PID: 10112 Comm: syz-executor.3 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x21c/0x280 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x5f/0xa0 mm/kmsan/kmsan_instr.c:197 udplite_error net/netfilter/nf_conntrack_proto_udp.c:162 [inline] nf_conntrack_udplite_packet+0x6cc/0x12d0 net/netfilter/nf_conntrack_proto_udp.c:188 nf_conntrack_handle_packet net/netfilter/nf_conntrack_core.c:1769 [inline] nf_conntrack_in+0x104b/0x296d net/netfilter/nf_conntrack_core.c:1847 ipv4_conntrack_local+0x225/0x3b0 net/netfilter/nf_conntrack_proto.c:200 nf_hook_entry_hookfn include/linux/netfilter.h:136 [inline] nf_hook_slow+0x17b/0x460 net/netfilter/core.c:589 nf_hook include/linux/netfilter.h:256 [inline] __ip_local_out+0x78c/0x840 net/ipv4/ip_output.c:115 ip_local_out net/ipv4/ip_output.c:124 [inline] ip_send_skb+0xb1/0x350 net/ipv4/ip_output.c:1568 udp_send_skb+0x152d/0x1bc0 net/ipv4/udp.c:947 udp_push_pending_frames net/ipv4/udp.c:975 [inline] udp_sendpage+0x7f2/0xba0 net/ipv4/udp.c:1346 inet_sendpage+0x1da/0x2f0 net/ipv4/af_inet.c:831 kernel_sendpage+0x47a/0x590 net/socket.c:3636 sock_sendpage+0x161/0x1a0 net/socket.c:945 pipe_to_sendpage+0x3e4/0x520 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x5e3/0xff0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0x1d5/0x2c0 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] do_splice+0x242e/0x3660 fs/splice.c:1059 __do_splice fs/splice.c:1137 [inline] __do_sys_splice fs/splice.c:1343 [inline] __se_sys_splice+0x8fa/0xb50 fs/splice.c:1325 __x64_sys_splice+0x6e/0x90 fs/splice.c:1325 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f44043a7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000004b069f R08: 0000000080000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffec06bf4df R14: 00007f44043a7300 R15: 0000000000022000 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289 __msan_chain_origin+0x57/0xa0 mm/kmsan/kmsan_instr.c:147 udp_send_skb+0x1767/0x1bc0 net/ipv4/udp.c:942 udp_push_pending_frames net/ipv4/udp.c:975 [inline] udp_sendpage+0x7f2/0xba0 net/ipv4/udp.c:1346 inet_sendpage+0x1da/0x2f0 net/ipv4/af_inet.c:831 kernel_sendpage+0x47a/0x590 net/socket.c:3636 sock_sendpage+0x161/0x1a0 net/socket.c:945 pipe_to_sendpage+0x3e4/0x520 fs/splice.c:364 splice_from_pipe_feed fs/splice.c:418 [inline] __splice_from_pipe+0x5e3/0xff0 fs/splice.c:562 splice_from_pipe fs/splice.c:597 [inline] generic_splice_sendpage+0x1d5/0x2c0 fs/splice.c:743 do_splice_from fs/splice.c:764 [inline] do_splice+0x242e/0x3660 fs/splice.c:1059 __do_splice fs/splice.c:1137 [inline] __do_sys_splice fs/splice.c:1343 [inline] __se_sys_splice+0x8fa/0xb50 fs/splice.c:1325 __x64_sys_splice+0x6e/0x90 fs/splice.c:1325 do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289 kmsan_memcpy_memmove_metadata+0x25e/0x2d0 mm/kmsan/kmsan.c:226 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:246 __msan_memcpy+0x46/0x60 mm/kmsan/kmsan_instr.c:110 skb_copy_from_linear_data_offset include/linux/skbuff.h:3666 [inline] skb_copy_bits+0x293/0x1040 net/core/skbuff.c:2217 tpacket_rcv+0x550a/0x8030 net/packet/af_packet.c:2338 deliver_skb net/core/dev.c:2260 [inline] dev_queue_xmit_nit+0x8c9/0x13b0 net/core/dev.c:2330 xmit_one+0x133/0x760 net/core/dev.c:3569 dev_hard_start_xmit net/core/dev.c:3590 [inline] __dev_queue_xmit+0x3426/0x45c0 net/core/dev.c:4151 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4184 batadv_send_skb_packet+0x622/0x970 net/batman-adv/send.c:108 batadv_send_broadcast_skb+0x76/0x90 net/batman-adv/send.c:127 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:393 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:419 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0xb2d/0xef0 net/batman-adv/bat_iv_ogm.c:1711 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:289 kmsan_memcpy_memmove_metadata+0x25e/0x2d0 mm/kmsan/kmsan.c:226 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:246 __msan_memcpy+0x46/0x60 mm/kmsan/kmsan_instr.c:110 pskb_expand_head+0x3d6/0x1e20 net/core/skbuff.c:1647 __skb_cow include/linux/skbuff.h:3171 [inline] skb_cow_head include/linux/skbuff.h:3205 [inline] batadv_skb_head_push+0x2cc/0x410 net/batman-adv/soft-interface.c:73 batadv_send_skb_packet+0x1ed/0x970 net/batman-adv/send.c:86 batadv_send_broadcast_skb+0x76/0x90 net/batman-adv/send.c:127 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:393 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:419 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0xb2d/0xef0 net/batman-adv/bat_iv_ogm.c:1711 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline] kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104 kmsan_slab_alloc+0x8d/0xe0 mm/kmsan/kmsan_hooks.c:76 slab_alloc_node mm/slub.c:2907 [inline] __kmalloc_node_track_caller+0xa37/0x1430 mm/slub.c:4527 __kmalloc_reserve net/core/skbuff.c:142 [inline] __alloc_skb+0x2f8/0xb30 net/core/skbuff.c:210 __netdev_alloc_skb+0x450/0x7f0 net/core/skbuff.c:446 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2852 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2862 [inline] batadv_iv_ogm_aggregate_new net/batman-adv/bat_iv_ogm.c:558 [inline] batadv_iv_ogm_queue_add+0x1376/0x1c40 net/batman-adv/bat_iv_ogm.c:670 batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:849 [inline] batadv_iv_ogm_schedule+0x128d/0x1670 net/batman-adv/bat_iv_ogm.c:869 batadv_iv_send_outstanding_bat_ogm_packet+0xd6e/0xef0 net/batman-adv/bat_iv_ogm.c:1723 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421 kthread+0x521/0x560 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 =====================================================