=====================================================
BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2667 [inline]
BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2681 [inline]
BUG: KMSAN: uninit-value in llc_fixup_skb net/llc/llc_input.c:134 [inline]
BUG: KMSAN: uninit-value in llc_rcv+0x1107/0x14a0 net/llc/llc_input.c:177
 pskb_may_pull_reason include/linux/skbuff.h:2667 [inline]
 pskb_may_pull include/linux/skbuff.h:2681 [inline]
 llc_fixup_skb net/llc/llc_input.c:134 [inline]
 llc_rcv+0x1107/0x14a0 net/llc/llc_input.c:177
 __netif_receive_skb_one_core net/core/dev.c:5527 [inline]
 __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5641
 process_backlog+0x480/0x8b0 net/core/dev.c:5969
 __napi_poll+0xe4/0x950 net/core/dev.c:6531
 napi_poll net/core/dev.c:6598 [inline]
 net_rx_action+0x884/0x16d0 net/core/dev.c:6731
 __do_softirq+0x1b7/0x78f 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:1046
 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4005
 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5362
 __do_sys_bpf kernel/bpf/syscall.c:5448 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5446 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5446
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767
 slab_alloc_node mm/slub.c:3478 [inline]
 kmem_cache_alloc_node+0x577/0xa80 mm/slub.c:3523
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:559
 pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2093
 skb_ensure_writable+0x3d3/0x460 net/core/skbuff.c:5940
 __bpf_try_make_writable net/core/filter.c:1658 [inline]
 bpf_try_make_writable net/core/filter.c:1664 [inline]
 bpf_try_make_head_writable net/core/filter.c:1672 [inline]
 ____bpf_clone_redirect net/core/filter.c:2447 [inline]
 bpf_clone_redirect+0x17f/0x470 net/core/filter.c:2425
 ___bpf_prog_run+0x2180/0xdb80 kernel/bpf/core.c:1954
 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2195
 bpf_dispatcher_nop_func include/linux/bpf.h:1181 [inline]
 __bpf_prog_run include/linux/filter.h:609 [inline]
 bpf_prog_run include/linux/filter.h:616 [inline]
 bpf_test_run+0x482/0xb00 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x14e5/0x1f20 net/bpf/test_run.c:1046
 bpf_prog_test_run+0x6af/0xac0 kernel/bpf/syscall.c:4005
 __sys_bpf+0x649/0xd60 kernel/bpf/syscall.c:5362
 __do_sys_bpf kernel/bpf/syscall.c:5448 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5446 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5446
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 0 PID: 5338 Comm: syz-executor.4 Not tainted 6.6.0-rc5-syzkaller-00243-g727fb8376504 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
=====================================================