=====================================================
BUG: KMSAN: uninit-value in eth_type_trans+0x69d/0x9a0 net/ethernet/eth.c:176
 eth_type_trans+0x69d/0x9a0 net/ethernet/eth.c:176
 __dev_forward_skb2+0x4b1/0x950 net/core/dev.c:2370
 dev_forward_skb_nomtu+0x3b/0xe0 net/core/dev.c:2409
 __bpf_rx_skb net/core/filter.c:2112 [inline]
 __bpf_redirect_common net/core/filter.c:2187 [inline]
 __bpf_redirect+0x14d6/0x1760 net/core/filter.c:2194
 ____bpf_clone_redirect net/core/filter.c:2468 [inline]
 bpf_clone_redirect+0x366/0x530 net/core/filter.c:2438
 ___bpf_prog_run+0x1294/0xeba0 kernel/bpf/core.c:2018
 __bpf_prog_run512+0xc5/0x100 kernel/bpf/core.c:2313
 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline]
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run include/linux/filter.h:725 [inline]
 bpf_test_run+0x547/0xd20 net/bpf/test_run.c:434
 bpf_prog_test_run_skb+0x19f8/0x26c0 net/bpf/test_run.c:1093
 bpf_prog_test_run+0x5b7/0xa30 kernel/bpf/syscall.c:4427
 __sys_bpf+0x6ca/0xe60 kernel/bpf/syscall.c:5852
 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5939 [inline]
 __ia32_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:5939
 ia32_sys_call+0x2544/0x42c0 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+0xb0/0x110 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4167 [inline]
 slab_alloc_node mm/slub.c:4210 [inline]
 kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4262
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:577
 pskb_expand_head+0x207/0x1c90 net/core/skbuff.c:2247
 skb_ensure_writable+0x4c9/0x590 net/core/skbuff.c:6241
 __bpf_try_make_writable net/core/filter.c:1673 [inline]
 bpf_try_make_writable net/core/filter.c:1679 [inline]
 bpf_try_make_head_writable net/core/filter.c:1687 [inline]
 ____bpf_clone_redirect net/core/filter.c:2462 [inline]
 bpf_clone_redirect+0x1c1/0x530 net/core/filter.c:2438
 ___bpf_prog_run+0x1294/0xeba0 kernel/bpf/core.c:2018
 __bpf_prog_run512+0xc5/0x100 kernel/bpf/core.c:2313
 bpf_dispatcher_nop_func include/linux/bpf.h:1316 [inline]
 __bpf_prog_run include/linux/filter.h:718 [inline]
 bpf_prog_run include/linux/filter.h:725 [inline]
 bpf_test_run+0x547/0xd20 net/bpf/test_run.c:434
 bpf_prog_test_run_skb+0x19f8/0x26c0 net/bpf/test_run.c:1093
 bpf_prog_test_run+0x5b7/0xa30 kernel/bpf/syscall.c:4427
 __sys_bpf+0x6ca/0xe60 kernel/bpf/syscall.c:5852
 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5939 [inline]
 __ia32_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:5939
 ia32_sys_call+0x2544/0x42c0 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+0xb0/0x110 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/syscall_32.c:331
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/syscall_32.c:369
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 0 UID: 0 PID: 14212 Comm: syz.1.1882 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
=====================================================