syzbot

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BUG: KMSAN: uninit-value in __netif_receive_skb_core+0x4a4/0x6190 net/core/dev.c:5368
 __netif_receive_skb_core+0x4a4/0x6190 net/core/dev.c:5368
 __netif_receive_skb_list_core+0x31e/0x1670 net/core/dev.c:5614
 __netif_receive_skb_list net/core/dev.c:5681 [inline]
 netif_receive_skb_list_internal+0x1085/0x1700 net/core/dev.c:5773
 netif_receive_skb_list+0x5a/0x460 net/core/dev.c:5825
 xdp_recv_frames net/bpf/test_run.c:278 [inline]
 xdp_test_run_batch net/bpf/test_run.c:356 [inline]
 bpf_test_run_xdp_live+0x2a56/0x2f70 net/bpf/test_run.c:384
 bpf_prog_test_run_xdp+0xf02/0x1a40 net/bpf/test_run.c:1267
 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was stored to memory at:
 __xdp_build_skb_from_frame+0x8d7/0x9e0 net/core/xdp.c:639
 xdp_recv_frames net/bpf/test_run.c:270 [inline]
 xdp_test_run_batch net/bpf/test_run.c:356 [inline]
 bpf_test_run_xdp_live+0x262a/0x2f70 net/bpf/test_run.c:384
 bpf_prog_test_run_xdp+0xf02/0x1a40 net/bpf/test_run.c:1267
 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was created at:
 __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598
 __alloc_pages_bulk+0x19e/0x21e0 mm/page_alloc.c:4523
 alloc_pages_bulk_array_node include/linux/gfp.h:211 [inline]
 __page_pool_alloc_pages_slow+0x1ad/0xdc0 net/core/page_pool.c:500
 page_pool_alloc_pages+0x10b/0x1c0 net/core/page_pool.c:549
 page_pool_dev_alloc_pages include/net/page_pool/helpers.h:92 [inline]
 xdp_test_run_batch net/bpf/test_run.c:301 [inline]
 bpf_test_run_xdp_live+0x937/0x2f70 net/bpf/test_run.c:384
 bpf_prog_test_run_xdp+0xf02/0x1a40 net/bpf/test_run.c:1267
 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
 __do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
 __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
 do_syscall_64+0xd5/0x1f0
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

CPU: 0 PID: 6759 Comm: syz-executor.0 Not tainted 6.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
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