syzbot

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BUG: KMSAN: uninit-value in hci_cmd_complete_evt+0xbc7/0xe50 net/bluetooth/hci_event.c:4247
 hci_cmd_complete_evt+0xbc7/0xe50 net/bluetooth/hci_event.c:4247
 hci_event_func net/bluetooth/hci_event.c:7508 [inline]
 hci_event_packet+0xce2/0x1e40 net/bluetooth/hci_event.c:7565
 hci_rx_work+0x9a8/0x12b0 net/bluetooth/hci_core.c:4036
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb8e/0x1d80 kernel/workqueue.c:3321
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3402
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x1e3/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 hci_cmd_complete_evt+0xbc0/0xe50 net/bluetooth/hci_event.c:4247
 hci_event_func net/bluetooth/hci_event.c:7508 [inline]
 hci_event_packet+0xce2/0x1e40 net/bluetooth/hci_event.c:7565
 hci_rx_work+0x9a8/0x12b0 net/bluetooth/hci_core.c:4036
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb8e/0x1d80 kernel/workqueue.c:3321
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3402
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x1e3/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 hci_cmd_complete_evt+0x775/0xe50 net/bluetooth/hci_event.c:-1
 hci_event_func net/bluetooth/hci_event.c:7508 [inline]
 hci_event_packet+0xce2/0x1e40 net/bluetooth/hci_event.c:7565
 hci_rx_work+0x9a8/0x12b0 net/bluetooth/hci_core.c:4036
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb8e/0x1d80 kernel/workqueue.c:3321
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3402
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x1e3/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4154 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_node_noprof+0x818/0xf00 mm/slub.c:4249
 kmalloc_reserve+0x13c/0x4b0 net/core/skbuff.c:579
 __alloc_skb+0x347/0x7d0 net/core/skbuff.c:670
 alloc_skb include/linux/skbuff.h:1336 [inline]
 bt_skb_alloc include/net/bluetooth/bluetooth.h:500 [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:593 [inline]
 vfs_write+0xb48/0x1580 fs/read_write.c:686
 ksys_write fs/read_write.c:738 [inline]
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x1fb/0x4d0 fs/read_write.c:746
 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+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 5094 Comm: kworker/u9:1 Not tainted 6.16.0-rc1-syzkaller #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: hci0 hci_rx_work
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