=====================================================
BUG: KMSAN: uninit-value in batadv_get_vid+0x1d4/0x300 net/batman-adv/main.c:632
 batadv_get_vid+0x1d4/0x300 net/batman-adv/main.c:632
 batadv_interface_tx+0x31c/0x1db0 net/batman-adv/soft-interface.c:213
 __netdev_start_xmit include/linux/netdevice.h:5002 [inline]
 netdev_start_xmit include/linux/netdevice.h:5011 [inline]
 xmit_one net/core/dev.c:3590 [inline]
 dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3606
 __dev_queue_xmit+0x366a/0x57d0 net/core/dev.c:4434
 dev_queue_xmit include/linux/netdevice.h:3168 [inline]
 __bpf_tx_skb net/core/filter.c:2135 [inline]
 __bpf_redirect_common net/core/filter.c:2179 [inline]
 __bpf_redirect+0x1511/0x1690 net/core/filter.c:2186
 ____bpf_clone_redirect net/core/filter.c:2460 [inline]
 bpf_clone_redirect+0x37e/0x500 net/core/filter.c:2430
 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:2011
 __bpf_prog_run512+0xc5/0xf0 kernel/bpf/core.c:2254
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_test_run+0x546/0xd20 net/bpf/test_run.c:434
 bpf_prog_test_run_skb+0x18c4/0x2570 net/bpf/test_run.c:1095
 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4402
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5808
 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5895
 ia32_sys_call+0x394d/0x4180 arch/x86/include/generated/asm/syscalls_32.h:358
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4110 [inline]
 slab_alloc_node mm/slub.c:4153 [inline]
 kmem_cache_alloc_node_noprof+0x907/0xe00 mm/slub.c:4205
 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:587
 pskb_expand_head+0x226/0x1a60 net/core/skbuff.c:2275
 skb_ensure_writable+0x496/0x520 net/core/skbuff.c:6214
 __bpf_try_make_writable net/core/filter.c:1665 [inline]
 bpf_try_make_writable net/core/filter.c:1671 [inline]
 bpf_try_make_head_writable net/core/filter.c:1679 [inline]
 ____bpf_clone_redirect net/core/filter.c:2454 [inline]
 bpf_clone_redirect+0x1c5/0x500 net/core/filter.c:2430
 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:2011
 __bpf_prog_run512+0xc5/0xf0 kernel/bpf/core.c:2254
 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline]
 __bpf_prog_run include/linux/filter.h:701 [inline]
 bpf_prog_run include/linux/filter.h:708 [inline]
 bpf_test_run+0x546/0xd20 net/bpf/test_run.c:434
 bpf_prog_test_run_skb+0x18c4/0x2570 net/bpf/test_run.c:1095
 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4402
 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5808
 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
 __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5895
 ia32_sys_call+0x394d/0x4180 arch/x86/include/generated/asm/syscalls_32.h:358
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 0 UID: 0 PID: 6149 Comm: syz.5.19 Not tainted 6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
=====================================================