syzbot

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BUG: KMSAN: uninit-value in bpf_prog_run_generic_xdp+0x1064/0x1a90 net/core/dev.c:4887
 bpf_prog_run_generic_xdp+0x1064/0x1a90 net/core/dev.c:4887
 netif_receive_generic_xdp net/core/dev.c:4950 [inline]
 do_xdp_generic+0x681/0xaf0 net/core/dev.c:5009
 __netif_receive_skb_core+0x251a/0x6100 net/core/dev.c:5350
 __netif_receive_skb_one_core net/core/dev.c:5527 [inline]
 __netif_receive_skb+0xc3/0x5a0 net/core/dev.c:5643
 process_backlog+0x480/0x8b0 net/core/dev.c:5971
 __napi_poll+0xe3/0x970 net/core/dev.c:6533
 napi_poll net/core/dev.c:6602 [inline]
 net_rx_action+0x884/0x16d0 net/core/dev.c:6735
 __do_softirq+0x1b7/0x7c3 kernel/softirq.c:553
 do_softirq+0x9a/0xf0 kernel/softirq.c:454
 __local_bh_enable_ip+0x99/0xa0 kernel/softirq.c:381
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 bpf_test_run+0x4be/0xb00 net/bpf/test_run.c:424
 bpf_prog_test_run_skb+0x14e5/0x1f20 net/bpf/test_run.c:1045
 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4040
 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5401
 __do_sys_bpf kernel/bpf/syscall.c:5487 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5485 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5485
 do_syscall_32_irqs_on arch/x86/entry/common.c:164 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:230
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:255
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:293
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
 slab_alloc_node mm/slub.c:3478 [inline]
 __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027
 kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582
 pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098
 netif_receive_generic_xdp net/core/dev.c:4942 [inline]
 do_xdp_generic+0x511/0xaf0 net/core/dev.c:5009
 __netif_receive_skb_core+0x251a/0x6100 net/core/dev.c:5350
 __netif_receive_skb_one_core net/core/dev.c:5527 [inline]
 __netif_receive_skb+0xc3/0x5a0 net/core/dev.c:5643
 process_backlog+0x480/0x8b0 net/core/dev.c:5971
 __napi_poll+0xe3/0x970 net/core/dev.c:6533
 napi_poll net/core/dev.c:6602 [inline]
 net_rx_action+0x884/0x16d0 net/core/dev.c:6735
 __do_softirq+0x1b7/0x7c3 kernel/softirq.c:553

CPU: 0 PID: 8119 Comm: syz-executor.5 Not tainted 6.7.0-rc4-syzkaller-00009-gbee0e7762ad2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
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