=====================================================
BUG: KMSAN: uninit-value in batadv_get_vid+0x2ce/0x3b0 net/batman-adv/main.c:577
 batadv_get_vid+0x2ce/0x3b0 net/batman-adv/main.c:577
 batadv_interface_tx+0x2e8/0x1dd0 net/batman-adv/mesh-interface.c:200
 __netdev_start_xmit include/linux/netdevice.h:5275 [inline]
 netdev_start_xmit include/linux/netdevice.h:5284 [inline]
 xmit_one net/core/dev.c:3864 [inline]
 dev_hard_start_xmit+0x22f/0xa30 net/core/dev.c:3880
 __dev_queue_xmit+0x350d/0x5890 net/core/dev.c:4829
 dev_queue_xmit include/linux/netdevice.h:3384 [inline]
 __bpf_tx_skb net/core/filter.c:2153 [inline]
 __bpf_redirect_common net/core/filter.c:2197 [inline]
 __bpf_redirect+0x162e/0x1760 net/core/filter.c:2204
 ____bpf_clone_redirect net/core/filter.c:2487 [inline]
 bpf_clone_redirect+0x4a6/0x6c0 net/core/filter.c:2450
 ___bpf_prog_run+0x12af/0xeb60 kernel/bpf/core.c:2041
 __bpf_prog_run512+0xc5/0x100 kernel/bpf/core.c:2337
 bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline]
 __bpf_prog_run include/linux/filter.h:723 [inline]
 bpf_prog_run include/linux/filter.h:730 [inline]
 bpf_test_run+0x493/0xdf0 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x22a5/0x3050 net/bpf/test_run.c:1159
 bpf_prog_test_run+0x5bb/0x9f0 kernel/bpf/syscall.c:4722
 __sys_bpf+0x925/0xee0 kernel/bpf/syscall.c:6247
 __do_sys_bpf kernel/bpf/syscall.c:6342 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6340 [inline]
 __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6340
 x64_sys_call+0x13d0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4466 [inline]
 slab_alloc_node mm/slub.c:4788 [inline]
 kmem_cache_alloc_node_noprof+0x3d0/0x1270 mm/slub.c:4840
 kmalloc_reserve net/core/skbuff.c:613 [inline]
 pskb_expand_head+0x2ef/0x1fb0 net/core/skbuff.c:2315
 skb_ensure_writable+0x44e/0x510 net/core/skbuff.c:6352
 __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:2481 [inline]
 bpf_clone_redirect+0x301/0x6c0 net/core/filter.c:2450
 ___bpf_prog_run+0x12af/0xeb60 kernel/bpf/core.c:2041
 __bpf_prog_run512+0xc5/0x100 kernel/bpf/core.c:2337
 bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline]
 __bpf_prog_run include/linux/filter.h:723 [inline]
 bpf_prog_run include/linux/filter.h:730 [inline]
 bpf_test_run+0x493/0xdf0 net/bpf/test_run.c:423
 bpf_prog_test_run_skb+0x22a5/0x3050 net/bpf/test_run.c:1159
 bpf_prog_test_run+0x5bb/0x9f0 kernel/bpf/syscall.c:4722
 __sys_bpf+0x925/0xee0 kernel/bpf/syscall.c:6247
 __do_sys_bpf kernel/bpf/syscall.c:6342 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6340 [inline]
 __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6340
 x64_sys_call+0x13d0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 11140 Comm: syz.0.862 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
=====================================================