=====================================================
BUG: KMSAN: uninit-value in __flush_smp_call_function_queue+0x362/0x18e0 kernel/smp.c:535
 __flush_smp_call_function_queue+0x362/0x18e0 kernel/smp.c:535
 generic_smp_call_function_single_interrupt+0x1c/0x30 kernel/smp.c:463
 __sysvec_call_function_single+0x4b/0x3e0 arch/x86/kernel/smp.c:271
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x7c/0x90 arch/x86/kernel/smp.c:266
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:704
 console_flush_one_record arch/x86/include/asm/irqflags.h:-1 [inline]
 console_flush_all+0xe48/0x1270 kernel/printk/printk.c:3343
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xeb/0x460 kernel/printk/printk.c:3413
 vprintk_emit+0x850/0xba0 kernel/printk/printk.c:2479
 dev_vprintk_emit+0x5ac/0x7a0 drivers/base/core.c:4915
 dev_printk_emit+0x180/0x1b0 drivers/base/core.c:4926
 __dev_printk+0x2a1/0x330 drivers/base/core.c:4938
 _dev_info+0x1b4/0x1d0 drivers/base/core.c:4984
 announce_device+0x1f2/0x500 drivers/usb/core/hub.c:2413
 usb_new_device+0x631/0x2120 drivers/usb/core/hub.c:2676
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x5404/0x77c0 drivers/usb/core/hub.c:5953
 process_one_work kernel/workqueue.c:3288 [inline]
 process_scheduled_works+0xb82/0x1e80 kernel/workqueue.c:3371
 worker_thread+0xee4/0x1590 kernel/workqueue.c:3452
 kthread+0x53f/0x600 kernel/kthread.c:436
 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Local variable warn created at:
 __dquot_alloc_space+0x4d/0x1cd0 fs/quota/dquot.c:1687
 dquot_alloc_space_nodirty include/linux/quotaops.h:299 [inline]
 dquot_alloc_block_nodirty include/linux/quotaops.h:326 [inline]
 shmem_inode_acct_blocks+0x376/0x5d0 mm/shmem.c:242

CPU: 1 UID: 0 PID: 12932 Comm: kworker/1:10 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: usb_hub_wq hub_event
=====================================================