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BUG: KMSAN: uninit-value in skb_trim+0x1fc/0x290 net/core/skbuff.c:2095
 skb_trim+0x1fc/0x290 net/core/skbuff.c:2095
 ath9k_htc_rx_msg+0x8b2/0xbc0 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+0x1745/0x1e30 drivers/net/wireless/ath/ath9k/hif_usb.c:687
 __usb_hcd_giveback_urb+0x6c9/0x930 drivers/usb/core/hcd.c:1670
 usb_hcd_giveback_urb+0x1e6/0x7c0 drivers/usb/core/hcd.c:1747
 dummy_timer+0xe82/0x4fd0 drivers/usb/gadget/udc/dummy_hcd.c:1988
 call_timer_fn+0x85/0x550 kernel/time/timer.c:1421
 expire_timers+0x2f0/0x6c0 kernel/time/timer.c:1466
 __run_timers+0x6dd/0xb00 kernel/time/timer.c:1737
 run_timer_softirq+0x75/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x206/0x809 kernel/softirq.c:558
 invoke_softirq+0xa8/0x130 kernel/softirq.c:432
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0x79/0x130 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_get_metadata+0x6/0x220 mm/kmsan/shadow.c:126
 kmsan_internal_set_shadow_origin+0x33/0xe0 mm/kmsan/core.c:274
 __msan_poison_alloca+0x157/0x1a0 mm/kmsan/instrumentation.c:231
 kmem_cache_free+0x270/0xab0 mm/slub.c:3541
 putname+0x2b6/0x2e0 fs/namei.c:270
 do_sys_openat2+0x865/0x900 fs/open.c:1222
 do_sys_open fs/open.c:1229 [inline]
 __do_sys_openat fs/open.c:1245 [inline]
 __se_sys_openat fs/open.c:1240 [inline]
 __x64_sys_openat+0x35d/0x3c0 fs/open.c:1240
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 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+0xdee/0x14e0 mm/slub.c:4962
 kmalloc_reserve net/core/skbuff.c:354 [inline]
 __alloc_skb+0x526/0xf50 net/core/skbuff.c:426
 __netdev_alloc_skb+0x4db/0x900 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+0xe89/0x1e30 drivers/net/wireless/ath/ath9k/hif_usb.c:687
 __usb_hcd_giveback_urb+0x6c9/0x930 drivers/usb/core/hcd.c:1670
 usb_hcd_giveback_urb+0x1e6/0x7c0 drivers/usb/core/hcd.c:1747
 dummy_timer+0xe82/0x4fd0 drivers/usb/gadget/udc/dummy_hcd.c:1988
 call_timer_fn+0x85/0x550 kernel/time/timer.c:1421
 expire_timers+0x2f0/0x6c0 kernel/time/timer.c:1466
 __run_timers+0x6dd/0xb00 kernel/time/timer.c:1737
 run_timer_softirq+0x75/0xf0 kernel/time/timer.c:1750
 __do_softirq+0x206/0x809 kernel/softirq.c:558

CPU: 0 PID: 2839 Comm: udevd Not tainted 5.18.0-syzkaller-16253-g2f3064574275 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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