=====================================================
BUG: KMSAN: uninit-value in skb_trim+0x1f8/0x280 net/core/skbuff.c:2095
 skb_trim+0x1f8/0x280 net/core/skbuff.c:2095
 ath9k_htc_rx_msg+0x63c/0xbc0 drivers/net/wireless/ath/ath9k/htc_hst.c:460
 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:654 [inline]
 ath9k_hif_usb_rx_cb+0x1721/0x1df0 drivers/net/wireless/ath/ath9k/hif_usb.c:687
 __usb_hcd_giveback_urb+0x6c6/0x930 drivers/usb/core/hcd.c:1670
 usb_hcd_giveback_urb+0x1e2/0x7c0 drivers/usb/core/hcd.c:1747
 dummy_timer+0x157a/0x51c0 drivers/usb/gadget/udc/dummy_hcd.c:1988
 call_timer_fn+0x81/0x540 kernel/time/timer.c:1421
 expire_timers+0x2f5/0x6d0 kernel/time/timer.c:1466
 __run_timers+0x682/0xa80 kernel/time/timer.c:1737
 run_timer_softirq+0x71/0xe0 kernel/time/timer.c:1750
 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558
 invoke_softirq+0xa4/0x130 kernel/softirq.c:432
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x76/0x130 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x9a/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 kmsan_metadata_is_contiguous+0x127/0x1e0 mm/kmsan/core.c:458
 kmsan_internal_set_shadow_origin+0x21/0xe0 mm/kmsan/core.c:273
 __msan_poison_alloca+0x15a/0x1a0 mm/kmsan/instrumentation.c:229
 arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
 arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
 _raw_spin_lock_irqsave+0x4d/0x120 kernel/locking/spinlock.c:162
 add_wait_queue+0xb4/0x5e0 kernel/sched/wait.c:22
 do_wait+0x130/0x1310 kernel/exit.c:1496
 kernel_wait4+0x40b/0x610 kernel/exit.c:1683
 __do_sys_wait4 kernel/exit.c:1711 [inline]
 __se_sys_wait4 kernel/exit.c:1707 [inline]
 __x64_sys_wait4+0x1f1/0x3f0 kernel/exit.c:1707
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:754 [inline]
 slab_alloc_node mm/slub.c:3231 [inline]
 __kmalloc_node_track_caller+0xde3/0x14f0 mm/slub.c:4962
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x545/0xf90 net/core/skbuff.c:426
 __netdev_alloc_skb+0x4b9/0x8c0 net/core/skbuff.c:494
 __dev_alloc_skb include/linux/skbuff.h:3107 [inline]
 ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:636 [inline]
 ath9k_hif_usb_rx_cb+0xead/0x1df0 drivers/net/wireless/ath/ath9k/hif_usb.c:687
 __usb_hcd_giveback_urb+0x6c6/0x930 drivers/usb/core/hcd.c:1670
 usb_hcd_giveback_urb+0x1e2/0x7c0 drivers/usb/core/hcd.c:1747
 dummy_timer+0x157a/0x51c0 drivers/usb/gadget/udc/dummy_hcd.c:1988
 call_timer_fn+0x81/0x540 kernel/time/timer.c:1421
 expire_timers+0x2f5/0x6d0 kernel/time/timer.c:1466
 __run_timers+0x682/0xa80 kernel/time/timer.c:1737
 run_timer_softirq+0x71/0xe0 kernel/time/timer.c:1750
 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558

CPU: 0 PID: 3520 Comm: syz-executor.3 Not tainted 5.18.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
=====================================================