=====================================================
BUG: KMSAN: uninit-value in bpf_prog_run_generic_xdp+0x143f/0x1fc0 net/core/dev.c:5449
 bpf_prog_run_generic_xdp+0x143f/0x1fc0 net/core/dev.c:5449
 netif_receive_generic_xdp net/core/dev.c:5534 [inline]
 do_xdp_generic+0xd52/0x1690 net/core/dev.c:5596
 __netif_receive_skb_core+0x1b1d/0x4d10 net/core/dev.c:5949
 __netif_receive_skb_one_core net/core/dev.c:6137 [inline]
 __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6252
 process_backlog+0x47c/0x9f0 net/core/dev.c:6604
 __napi_poll+0xd8/0x880 net/core/dev.c:7668
 napi_poll net/core/dev.c:7731 [inline]
 net_rx_action+0xa3f/0x1c90 net/core/dev.c:7883
 handle_softirqs+0x169/0x6e0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656
 do_softirq+0x58/0x90 kernel/softirq.c:523
 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:450
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 bpf_test_run+0x539/0xe00 net/bpf/test_run.c:426
 bpf_prog_test_run_skb+0x2377/0x3200 net/bpf/test_run.c:1158
 bpf_prog_test_run+0x5bb/0x9f0 kernel/bpf/syscall.c:4703
 __sys_bpf+0x873/0xeb0 kernel/bpf/syscall.c:6182
 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
 __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6272
 x64_sys_call+0x31c3/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd3/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4960 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x9e7/0x17a0 mm/slub.c:5315
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:586
 pskb_expand_head+0x1fc/0x15d0 net/core/skbuff.c:2282
 netif_skb_check_for_xdp net/core/dev.c:5497 [inline]
 netif_receive_generic_xdp net/core/dev.c:5528 [inline]
 do_xdp_generic+0xa79/0x1690 net/core/dev.c:5596
 __netif_receive_skb_core+0x1b1d/0x4d10 net/core/dev.c:5949
 __netif_receive_skb_one_core net/core/dev.c:6137 [inline]
 __netif_receive_skb+0xcc/0xac0 net/core/dev.c:6252
 process_backlog+0x47c/0x9f0 net/core/dev.c:6604
 __napi_poll+0xd8/0x880 net/core/dev.c:7668
 napi_poll net/core/dev.c:7731 [inline]
 net_rx_action+0xa3f/0x1c90 net/core/dev.c:7883
 handle_softirqs+0x169/0x6e0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656

CPU: 0 UID: 0 PID: 11730 Comm: syz.6.1453 Tainted: G        W    L      syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
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