=====================================================
BUG: KMSAN: uninit-value in batadv_get_vid+0x1b2/0x2e0 net/batman-adv/main.c:629
 batadv_get_vid+0x1b2/0x2e0 net/batman-adv/main.c:629
 batadv_interface_tx+0x2f1/0x1e00 net/batman-adv/soft-interface.c:212
 __netdev_start_xmit include/linux/netdevice.h:4805 [inline]
 netdev_start_xmit include/linux/netdevice.h:4819 [inline]
 xmit_one+0x14e/0x5f0 net/core/dev.c:3588
 dev_hard_start_xmit+0xe5/0x370 net/core/dev.c:3604
 __dev_queue_xmit+0x1dec/0x31f0 net/core/dev.c:4253
 dev_queue_xmit include/linux/netdevice.h:2994 [inline]
 __bpf_tx_skb net/core/filter.c:2114 [inline]
 __bpf_redirect_common net/core/filter.c:2153 [inline]
 __bpf_redirect+0x1277/0x1430 net/core/filter.c:2160
 ____bpf_clone_redirect net/core/filter.c:2429 [inline]
 bpf_clone_redirect+0x324/0x470 net/core/filter.c:2401
 ___bpf_prog_run+0x7ed/0xaee0 kernel/bpf/core.c:1850
 __bpf_prog_run512+0xc2/0x110 kernel/bpf/core.c:2075
 bpf_dispatcher_nop_func include/linux/bpf.h:869 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 bpf_test_run+0x592/0xd20 net/bpf/test_run.c:402
 bpf_prog_test_run_skb+0x1625/0x20b0 net/bpf/test_run.c:1155
 bpf_prog_test_run+0x6a0/0x730 kernel/bpf/syscall.c:3591
 __sys_bpf+0x9e8/0xeb0 kernel/bpf/syscall.c:4935
 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]
 __ia32_sys_bpf+0x9c/0xe0 kernel/bpf/syscall.c:5019
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x95/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x53/0x62

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:755 [inline]
 slab_alloc_node mm/slub.c:3229 [inline]
 __kmalloc_node_track_caller+0x86c/0x1230 mm/slub.c:4966
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 pskb_expand_head+0x1aa/0x1a00 net/core/skbuff.c:1695
 skb_ensure_writable+0x3ce/0x460 net/core/skbuff.c:5609
 __bpf_try_make_writable net/core/filter.c:1655 [inline]
 bpf_try_make_writable net/core/filter.c:1661 [inline]
 bpf_try_make_head_writable net/core/filter.c:1669 [inline]
 ____bpf_clone_redirect net/core/filter.c:2423 [inline]
 bpf_clone_redirect+0x17b/0x470 net/core/filter.c:2401
 ___bpf_prog_run+0x7ed/0xaee0 kernel/bpf/core.c:1850
 __bpf_prog_run512+0xc2/0x110 kernel/bpf/core.c:2075
 bpf_dispatcher_nop_func include/linux/bpf.h:869 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 bpf_test_run+0x592/0xd20 net/bpf/test_run.c:402
 bpf_prog_test_run_skb+0x1625/0x20b0 net/bpf/test_run.c:1155
 bpf_prog_test_run+0x6a0/0x730 kernel/bpf/syscall.c:3591
 __sys_bpf+0x9e8/0xeb0 kernel/bpf/syscall.c:4935
 __do_sys_bpf kernel/bpf/syscall.c:5021 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5019 [inline]
 __ia32_sys_bpf+0x9c/0xe0 kernel/bpf/syscall.c:5019
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x95/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x53/0x62

CPU: 1 PID: 7780 Comm: syz-executor.4 Not tainted 5.19.0-rc3-syzkaller-30868-g4b28366af7d9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================