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BUG: KMSAN: uninit-value in bpf_prog_run_generic_xdp+0x13a0/0x1ee0 net/core/dev.c:4882
 bpf_prog_run_generic_xdp+0x13a0/0x1ee0 net/core/dev.c:4882
 netif_receive_generic_xdp net/core/dev.c:4964 [inline]
 do_xdp_generic+0xb68/0x1440 net/core/dev.c:5023
 __netif_receive_skb_core+0x2533/0x6190 net/core/dev.c:5364
 __netif_receive_skb_one_core net/core/dev.c:5542 [inline]
 __netif_receive_skb+0xca/0xa00 net/core/dev.c:5658
 process_backlog+0x480/0x8b0 net/core/dev.c:5987
 __napi_poll+0xe7/0x980 net/core/dev.c:6638
 napi_poll net/core/dev.c:6707 [inline]
 net_rx_action+0x89d/0x1820 net/core/dev.c:6822
 __do_softirq+0x1c0/0x7d7 kernel/softirq.c:554
 do_softirq+0x9a/0x100 kernel/softirq.c:455
 __local_bh_enable_ip+0x9f/0xb0 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 bpf_test_run+0x4d7/0xc30 net/bpf/test_run.c:426
 bpf_prog_test_run_skb+0x14ea/0x1f20 net/bpf/test_run.c:1058
 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5678
 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5765 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765
 ia32_sys_call+0xf7e/0x40a0 arch/x86/include/generated/asm/syscalls_32.h:358
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb4/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3804 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 __do_kmalloc_node mm/slub.c:3965 [inline]
 __kmalloc_node_track_caller+0x747/0x1060 mm/slub.c:3986
 kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:599
 pskb_expand_head+0x222/0x19d0 net/core/skbuff.c:2245
 netif_skb_check_for_xdp net/core/dev.c:4927 [inline]
 netif_receive_generic_xdp net/core/dev.c:4958 [inline]
 do_xdp_generic+0x931/0x1440 net/core/dev.c:5023
 __netif_receive_skb_core+0x2533/0x6190 net/core/dev.c:5364
 __netif_receive_skb_one_core net/core/dev.c:5542 [inline]
 __netif_receive_skb+0xca/0xa00 net/core/dev.c:5658
 process_backlog+0x480/0x8b0 net/core/dev.c:5987
 __napi_poll+0xe7/0x980 net/core/dev.c:6638
 napi_poll net/core/dev.c:6707 [inline]
 net_rx_action+0x89d/0x1820 net/core/dev.c:6822
 __do_softirq+0x1c0/0x7d7 kernel/softirq.c:554

CPU: 0 PID: 22705 Comm: syz-executor.4 Not tainted 6.9.0-rc5-syzkaller-00053-ge33c4963bf53 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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