=====================================================
BUG: KMSAN: uninit-value in mark_reg_read kernel/bpf/verifier.c:3025 [inline]
BUG: KMSAN: uninit-value in check_stack_range_initialized+0x1c4a/0x2450 kernel/bpf/verifier.c:7220
 mark_reg_read kernel/bpf/verifier.c:3025 [inline]
 check_stack_range_initialized+0x1c4a/0x2450 kernel/bpf/verifier.c:7220
 check_helper_mem_access+0x7e3/0x2380 kernel/bpf/verifier.c:7286
 check_helper_call+0x539f/0xb660 kernel/bpf/verifier.c:10244
 do_check+0xe26c/0x16780 kernel/bpf/verifier.c:17793
 do_check_common+0x2044/0x2e60 kernel/bpf/verifier.c:20492
 do_check_main kernel/bpf/verifier.c:20583 [inline]
 bpf_check+0x16b97/0x1f550 kernel/bpf/verifier.c:21253
 bpf_prog_load+0x2975/0x2e10 kernel/bpf/syscall.c:2895
 __sys_bpf+0x770/0xd90 kernel/bpf/syscall.c:5631
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xba/0x120 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x7a/0x84

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3804 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 kmalloc_trace+0x578/0xba0 mm/slub.c:3992
 kmalloc include/linux/slab.h:628 [inline]
 neigh_hash_alloc+0x6a/0x440 net/core/neighbour.c:538
 neigh_hash_grow net/core/neighbour.c:587 [inline]
 ___neigh_create+0x1a59/0x3380 net/core/neighbour.c:687
 __neigh_create+0x4b/0x60 net/core/neighbour.c:737
 ip_neigh_gw4 include/net/route.h:365 [inline]
 ip_neigh_for_gw include/net/route.h:378 [inline]
 ip_finish_output2+0xc4e/0x1b70 net/ipv4/ip_output.c:229
 __ip_finish_output+0x287/0x810
 ip_finish_output+0x4b/0x550 net/ipv4/ip_output.c:323
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip_output+0x15f/0x3f0 net/ipv4/ip_output.c:433
 dst_output include/net/dst.h:450 [inline]
 ip_local_out+0x1c8/0x210 net/ipv4/ip_output.c:129
 iptunnel_xmit+0x6b1/0xba0 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x297/0x390 net/ipv4/udp_tunnel_core.c:172
 geneve_xmit_skb drivers/net/geneve.c:910 [inline]
 geneve_xmit+0x2d9d/0x5420 drivers/net/geneve.c:1030
 __netdev_start_xmit include/linux/netdevice.h:4903 [inline]
 netdev_start_xmit include/linux/netdevice.h:4917 [inline]
 xmit_one net/core/dev.c:3531 [inline]
 dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547
 __dev_queue_xmit+0x348d/0x52c0 net/core/dev.c:4335
 dev_queue_xmit include/linux/netdevice.h:3091 [inline]
 neigh_resolve_output+0x9c9/0xae0 net/core/neighbour.c:1563
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0x2339/0x2b90 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x9b6/0x14c0 net/ipv6/ip6_output.c:222
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243
 dst_output include/net/dst.h:450 [inline]
 NF_HOOK include/linux/netfilter.h:314 [inline]
 mld_sendpack+0xcaa/0x1510 net/ipv6/mcast.c:1818
 mld_send_cr net/ipv6/mcast.c:2119 [inline]
 mld_ifc_work+0x124d/0x18b0 net/ipv6/mcast.c:2650
 process_one_work kernel/workqueue.c:3254 [inline]
 process_scheduled_works+0xa81/0x1bd0 kernel/workqueue.c:3335
 worker_thread+0xea5/0x1560 kernel/workqueue.c:3416
 kthread+0x3e2/0x540 kernel/kthread.c:388
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243

CPU: 1 PID: 5632 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-11409-gf6cef5f8c37f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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