=====================================================
BUG: KMSAN: uninit-value in ieee802154_hdr_push_sechdr net/ieee802154/header_ops.c:54 [inline]
BUG: KMSAN: uninit-value in ieee802154_hdr_push+0x9ac/0xa30 net/ieee802154/header_ops.c:108
 ieee802154_hdr_push_sechdr net/ieee802154/header_ops.c:54 [inline]
 ieee802154_hdr_push+0x9ac/0xa30 net/ieee802154/header_ops.c:108
 ieee802154_header_create+0x854/0xb90 net/mac802154/iface.c:396
 wpan_dev_hard_header include/net/cfg802154.h:525 [inline]
 dgram_sendmsg+0xb3d/0x16d0 net/ieee802154/socket.c:677
 ieee802154_sock_sendmsg+0x8f/0xd0 net/ieee802154/socket.c:96
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x330/0x3d0 net/socket.c:727
 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
 x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 ieee802154_hdr_push_sechdr net/ieee802154/header_ops.c:54 [inline]
 ieee802154_hdr_push+0x9a5/0xa30 net/ieee802154/header_ops.c:108
 ieee802154_header_create+0x854/0xb90 net/mac802154/iface.c:396
 wpan_dev_hard_header include/net/cfg802154.h:525 [inline]
 dgram_sendmsg+0xb3d/0x16d0 net/ieee802154/socket.c:677
 ieee802154_sock_sendmsg+0x8f/0xd0 net/ieee802154/socket.c:96
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg+0x330/0x3d0 net/socket.c:727
 ____sys_sendmsg+0x7e0/0xd80 net/socket.c:2566
 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2620
 __sys_sendmsg net/socket.c:2652 [inline]
 __do_sys_sendmsg net/socket.c:2657 [inline]
 __se_sys_sendmsg net/socket.c:2655 [inline]
 __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2655
 x64_sys_call+0x32fb/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:47
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable hdr created at:
 ieee802154_header_create+0x4e/0xb90 net/mac802154/iface.c:360
 wpan_dev_hard_header include/net/cfg802154.h:525 [inline]
 dgram_sendmsg+0xb3d/0x16d0 net/ieee802154/socket.c:677

CPU: 0 UID: 0 PID: 25728 Comm: syz.2.5735 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
=====================================================