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BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]
BUG: KMSAN: kernel-infoleak in _inline_copy_to_user include/linux/uaccess.h:196 [inline]
BUG: KMSAN: kernel-infoleak in _copy_to_user+0xcc/0x120 lib/usercopy.c:26
 instrument_copy_to_user include/linux/instrumented.h:114 [inline]
 _inline_copy_to_user include/linux/uaccess.h:196 [inline]
 _copy_to_user+0xcc/0x120 lib/usercopy.c:26
 copy_to_user include/linux/uaccess.h:225 [inline]
 move_addr_to_user+0x29c/0x410 net/socket.c:293
 ____sys_recvmsg+0x232/0x610 net/socket.c:2793
 ___sys_recvmsg+0x20b/0x850 net/socket.c:2828
 do_recvmmsg+0x40e/0xdf0 net/socket.c:2923
 __sys_recvmmsg net/socket.c:2997 [inline]
 __do_sys_recvmmsg net/socket.c:3020 [inline]
 __se_sys_recvmmsg net/socket.c:3013 [inline]
 __x64_sys_recvmmsg+0x383/0x500 net/socket.c:3013
 x64_sys_call+0x220d/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:300
 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_addr_to_sa include/net/ieee802154_netdev.h:369 [inline]
 dgram_recvmsg+0xa17/0xbe0 net/ieee802154/socket.c:739
 sock_common_recvmsg+0xd2/0x1d0 net/core/sock.c:3878
 sock_recvmsg_nosec net/socket.c:1017 [inline]
 sock_recvmsg+0x2dc/0x390 net/socket.c:1039
 ____sys_recvmsg+0x193/0x610 net/socket.c:2786
 ___sys_recvmsg+0x20b/0x850 net/socket.c:2828
 do_recvmmsg+0x40e/0xdf0 net/socket.c:2923
 __sys_recvmmsg net/socket.c:2997 [inline]
 __do_sys_recvmmsg net/socket.c:3020 [inline]
 __se_sys_recvmmsg net/socket.c:3013 [inline]
 __x64_sys_recvmmsg+0x383/0x500 net/socket.c:3013
 x64_sys_call+0x220d/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:300
 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:
 __copy_skb_header+0xa3/0x840 net/core/skbuff.c:1505
 __skb_clone+0x57/0x650 net/core/skbuff.c:1557
 skb_clone+0x473/0x580 net/core/skbuff.c:2063
 __ieee802154_rx_handle_packet net/mac802154/rx.c:363 [inline]
 ieee802154_rx+0xdeb/0x3460 net/mac802154/rx.c:431
 ieee802154_tasklet_handler+0x139/0x2b0 net/mac802154/main.c:35
 tasklet_action_common+0x35f/0xd70 kernel/softirq.c:829
 tasklet_action+0x2d/0x40 kernel/softirq.c:855
 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579
 __do_softirq+0x14/0x1b kernel/softirq.c:613

Uninit was stored to memory at:
 ieee802154_parse_frame_start net/mac802154/rx.c:299 [inline]
 __ieee802154_rx_handle_packet net/mac802154/rx.c:343 [inline]
 ieee802154_rx+0xb4d/0x3460 net/mac802154/rx.c:431
 ieee802154_tasklet_handler+0x139/0x2b0 net/mac802154/main.c:35
 tasklet_action_common+0x35f/0xd70 kernel/softirq.c:829
 tasklet_action+0x2d/0x40 kernel/softirq.c:855
 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579
 __do_softirq+0x14/0x1b kernel/softirq.c:613

Uninit was stored to memory at:
 ieee802154_hdr_get_addrs net/ieee802154/header_ops.c:275 [inline]
 ieee802154_hdr_pull+0xbf1/0xd60 net/ieee802154/header_ops.c:294
 ieee802154_parse_frame_start net/mac802154/rx.c:283 [inline]
 __ieee802154_rx_handle_packet net/mac802154/rx.c:343 [inline]
 ieee802154_rx+0xa3d/0x3460 net/mac802154/rx.c:431
 ieee802154_tasklet_handler+0x139/0x2b0 net/mac802154/main.c:35
 tasklet_action_common+0x35f/0xd70 kernel/softirq.c:829
 tasklet_action+0x2d/0x40 kernel/softirq.c:855
 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579
 __do_softirq+0x14/0x1b kernel/softirq.c:613

Local variable hdr.i created at:
 __ieee802154_rx_handle_packet net/mac802154/rx.c:340 [inline]
 ieee802154_rx+0x96e/0x3460 net/mac802154/rx.c:431
 ieee802154_tasklet_handler+0x139/0x2b0 net/mac802154/main.c:35

Bytes 8-9 of 20 are uninitialized
Memory access of size 20 starts at ffff88804246fa38
Data copied to user address 0000200000000000

CPU: 0 UID: 0 PID: 14873 Comm: syz.1.2071 Tainted: G        W           6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
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