=====================================================
BUG: KMSAN: uninit-value in l2cap_conless_channel net/bluetooth/l2cap_core.c:6746 [inline]
BUG: KMSAN: uninit-value in l2cap_recv_frame+0xc27d/0x18490 net/bluetooth/l2cap_core.c:6820
 l2cap_conless_channel net/bluetooth/l2cap_core.c:6746 [inline]
 l2cap_recv_frame+0xc27d/0x18490 net/bluetooth/l2cap_core.c:6820
 l2cap_recv_acldata+0xe4b/0x1f80 net/bluetooth/l2cap_core.c:7533
 hci_acldata_packet net/bluetooth/hci_core.c:3782 [inline]
 hci_rx_work+0x8a6/0x12b0 net/bluetooth/hci_core.c:4025
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400
 kthread+0xd59/0xf00 kernel/kthread.c:464
 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 l2cap_recv_frame+0xc276/0x18490 net/bluetooth/l2cap_core.c:6818
 l2cap_recv_acldata+0xe4b/0x1f80 net/bluetooth/l2cap_core.c:7533
 hci_acldata_packet net/bluetooth/hci_core.c:3782 [inline]
 hci_rx_work+0x8a6/0x12b0 net/bluetooth/hci_core.c:4025
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb97/0x1d90 kernel/workqueue.c:3319
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3400
 kthread+0xd59/0xf00 kernel/kthread.c:464
 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4167 [inline]
 slab_alloc_node mm/slub.c:4210 [inline]
 kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4262
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:577
 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1340 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:496 [inline]
 vhci_get_user drivers/bluetooth/hci_vhci.c:488 [inline]
 vhci_write+0x125/0x960 drivers/bluetooth/hci_vhci.c:608
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0xb31/0x1560 fs/read_write.c:684
 ksys_write fs/read_write.c:736 [inline]
 __do_sys_write fs/read_write.c:747 [inline]
 __se_sys_write fs/read_write.c:744 [inline]
 __x64_sys_write+0x1fb/0x4d0 fs/read_write.c:744
 x64_sys_call+0x38c3/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:2
 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

CPU: 1 UID: 0 PID: 5974 Comm: kworker/u9:3 Not tainted 6.15.0-rc4-syzkaller-00042-gb6ea1680d0ac #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: hci0 hci_rx_work
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