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BUG: KMSAN: uninit-value in bpf_prog_run_generic_xdp+0x11c2/0x20d0 net/core/dev.c:5519
 bpf_prog_run_generic_xdp+0x11c2/0x20d0 net/core/dev.c:5519
 netif_receive_generic_xdp net/core/dev.c:5604 [inline]
 do_xdp_generic+0xe07/0x17b0 net/core/dev.c:5666
 __netif_receive_skb_core+0x1a46/0x4d90 net/core/dev.c:6012
 __netif_receive_skb_one_core net/core/dev.c:6200 [inline]
 __netif_receive_skb net/core/dev.c:6315 [inline]
 process_backlog+0x514/0x1500 net/core/dev.c:6666
 __napi_poll+0xdc/0x910 net/core/dev.c:7730
 napi_poll net/core/dev.c:7793 [inline]
 net_rx_action+0xa5b/0x1c70 net/core/dev.c:7950
 handle_softirqs+0x171/0x7b0 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+0x536/0xdf0 net/bpf/test_run.c:426
 bpf_prog_test_run_skb+0x2988/0x35f0 net/bpf/test_run.c:1192
 bpf_prog_test_run+0x5bb/0x9f0 kernel/bpf/syscall.c:4742
 __sys_bpf+0x925/0xee0 kernel/bpf/syscall.c:6266
 __do_sys_bpf kernel/bpf/syscall.c:6361 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6359 [inline]
 __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6359
 x64_sys_call+0x13d0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 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:4576 [inline]
 slab_alloc_node mm/slub.c:4898 [inline]
 kmem_cache_alloc_node_noprof+0x3cd/0x12c0 mm/slub.c:4950
 kmalloc_reserve net/core/skbuff.c:613 [inline]
 pskb_expand_head+0x2f3/0x1a40 net/core/skbuff.c:2302
 netif_skb_check_for_xdp net/core/dev.c:5567 [inline]
 netif_receive_generic_xdp net/core/dev.c:5598 [inline]
 do_xdp_generic+0xb30/0x17b0 net/core/dev.c:5666
 __netif_receive_skb_core+0x1a46/0x4d90 net/core/dev.c:6012
 __netif_receive_skb_one_core net/core/dev.c:6200 [inline]
 __netif_receive_skb net/core/dev.c:6315 [inline]
 process_backlog+0x514/0x1500 net/core/dev.c:6666
 __napi_poll+0xdc/0x910 net/core/dev.c:7730
 napi_poll net/core/dev.c:7793 [inline]
 net_rx_action+0xa5b/0x1c70 net/core/dev.c:7950
 handle_softirqs+0x171/0x7b0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656

CPU: 1 UID: 0 PID: 6099 Comm: syz.4.78 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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