=====================================================
BUG: KMSAN: uninit-value in batadv_get_vid+0x2d0/0x3b0 net/batman-adv/main.c:577
 batadv_get_vid+0x2d0/0x3b0 net/batman-adv/main.c:577
 batadv_interface_tx+0x2e5/0x1e60 net/batman-adv/mesh-interface.c:200
 __netdev_start_xmit include/linux/netdevice.h:5248 [inline]
 netdev_start_xmit include/linux/netdevice.h:5257 [inline]
 xmit_one net/core/dev.c:3845 [inline]
 dev_hard_start_xmit+0x22f/0xa30 net/core/dev.c:3861
 __dev_queue_xmit+0x3c51/0x5e60 net/core/dev.c:4763
 dev_queue_xmit include/linux/netdevice.h:3365 [inline]
 __bpf_tx_skb net/core/filter.c:2153 [inline]
 __bpf_redirect_common net/core/filter.c:2197 [inline]
 __bpf_redirect+0x162d/0x1760 net/core/filter.c:2204
 ____bpf_clone_redirect net/core/filter.c:2480 [inline]
 bpf_clone_redirect+0x366/0x530 net/core/filter.c:2450
 ___bpf_prog_run+0x1297/0xeba0 kernel/bpf/core.c:2000
 __bpf_prog_run512+0xc5/0x100 kernel/bpf/core.c:2296
 bpf_dispatcher_nop_func include/linux/bpf.h:1350 [inline]
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run include/linux/filter.h:728 [inline]
 bpf_test_run+0x496/0xd80 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x18c1/0x26a0 net/bpf/test_run.c:1091
 bpf_prog_test_run+0x5c2/0xa40 kernel/bpf/syscall.c:4688
 __sys_bpf+0x873/0xeb0 kernel/bpf/syscall.c:6167
 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6257 [inline]
 __ia32_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6257
 ia32_sys_call+0xadf/0x4310 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+0xb0/0x150 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:4969 [inline]
 slab_alloc_node mm/slub.c:5272 [inline]
 kmem_cache_alloc_node_noprof+0x989/0x16b0 mm/slub.c:5324
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:579
 pskb_expand_head+0x1fc/0x1610 net/core/skbuff.c:2241
 skb_ensure_writable+0x44e/0x510 net/core/skbuff.c:6273
 __bpf_try_make_writable net/core/filter.c:1682 [inline]
 bpf_try_make_writable net/core/filter.c:1688 [inline]
 bpf_try_make_head_writable net/core/filter.c:1696 [inline]
 ____bpf_clone_redirect net/core/filter.c:2474 [inline]
 bpf_clone_redirect+0x1c1/0x530 net/core/filter.c:2450
 ___bpf_prog_run+0x1297/0xeba0 kernel/bpf/core.c:2000
 __bpf_prog_run512+0xc5/0x100 kernel/bpf/core.c:2296
 bpf_dispatcher_nop_func include/linux/bpf.h:1350 [inline]
 __bpf_prog_run include/linux/filter.h:721 [inline]
 bpf_prog_run include/linux/filter.h:728 [inline]
 bpf_test_run+0x496/0xd80 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x18c1/0x26a0 net/bpf/test_run.c:1091
 bpf_prog_test_run+0x5c2/0xa40 kernel/bpf/syscall.c:4688
 __sys_bpf+0x873/0xeb0 kernel/bpf/syscall.c:6167
 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6257 [inline]
 __ia32_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6257
 ia32_sys_call+0xadf/0x4310 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+0xb0/0x150 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: 1 UID: 0 PID: 9101 Comm: syz.3.929 Tainted: G        W           syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
=====================================================