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BUG: KMSAN: uninit-value in bpf_prog_run_generic_xdp+0x11c2/0x20d0 net/core/dev.c:5477
 bpf_prog_run_generic_xdp+0x11c2/0x20d0 net/core/dev.c:5477
 netif_receive_generic_xdp net/core/dev.c:5562 [inline]
 do_xdp_generic+0xe07/0x17f0 net/core/dev.c:5624
 __netif_receive_skb_core+0x1a46/0x4dc0 net/core/dev.c:5977
 __netif_receive_skb_one_core net/core/dev.c:6165 [inline]
 __netif_receive_skb net/core/dev.c:6280 [inline]
 process_backlog+0x514/0x1500 net/core/dev.c:6631
 __napi_poll+0xdc/0x950 net/core/dev.c:7695
 napi_poll net/core/dev.c:7758 [inline]
 net_rx_action+0xa5b/0x1c70 net/core/dev.c:7910
 handle_softirqs+0x171/0x7e0 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+0x22a5/0x3050 net/bpf/test_run.c:1159
 bpf_prog_test_run+0x5bb/0x9f0 kernel/bpf/syscall.c:4722
 __sys_bpf+0x925/0xee0 kernel/bpf/syscall.c:6246
 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6339 [inline]
 __ia32_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6339
 ia32_sys_call+0x33e7/0x4360 arch/x86/include/generated/asm/syscalls_32.h:358
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x17f/0x3f0 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/syscall_32.c:332
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:370
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4522 [inline]
 slab_alloc_node mm/slub.c:4844 [inline]
 kmem_cache_alloc_node_noprof+0x3cd/0x12d0 mm/slub.c:4896
 kmalloc_reserve net/core/skbuff.c:613 [inline]
 pskb_expand_head+0x2ef/0x1fb0 net/core/skbuff.c:2315
 netif_skb_check_for_xdp net/core/dev.c:5525 [inline]
 netif_receive_generic_xdp net/core/dev.c:5556 [inline]
 do_xdp_generic+0xb30/0x17f0 net/core/dev.c:5624
 __netif_receive_skb_core+0x1a46/0x4dc0 net/core/dev.c:5977
 __netif_receive_skb_one_core net/core/dev.c:6165 [inline]
 __netif_receive_skb net/core/dev.c:6280 [inline]
 process_backlog+0x514/0x1500 net/core/dev.c:6631
 __napi_poll+0xdc/0x950 net/core/dev.c:7695
 napi_poll net/core/dev.c:7758 [inline]
 net_rx_action+0xa5b/0x1c70 net/core/dev.c:7910
 handle_softirqs+0x171/0x7e0 kernel/softirq.c:622
 __do_softirq+0x14/0x1b kernel/softirq.c:656

CPU: 0 UID: 0 PID: 10135 Comm: syz.5.1750 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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