=====================================================
BUG: KMSAN: uninit-value in skb_trim+0x1f8/0x280 net/core/skbuff.c:2063
 skb_trim+0x1f8/0x280 net/core/skbuff.c:2063
 ath9k_htc_rx_msg+0x63c/0xbb0 drivers/net/wireless/ath/ath9k/htc_hst.c:455
 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:1987
 call_timer_fn+0x81/0x540 kernel/time/timer.c:1421
 expire_timers+0x2f5/0x6d0 kernel/time/timer.c:1466
 __run_timers+0x66b/0x9f0 kernel/time/timer.c:1734
 run_timer_softirq+0x71/0xe0 kernel/time/timer.c:1747
 __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+0xa2/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 __msan_metadata_ptr_for_load_4+0x2d/0x30 mm/kmsan/instrumentation.c:76
 stack_trace_consume_entry+0xd6/0x300 kernel/stacktrace.c:89
 arch_stack_walk+0x2f9/0x3c0 arch/x86/kernel/stacktrace.c:27
 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:122
 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline]
 kmsan_internal_poison_memory+0x45/0x90 mm/kmsan/core.c:65
 kmsan_slab_alloc+0xe1/0x150 mm/kmsan/hooks.c:69
 slab_post_alloc_hook mm/slab.h:737 [inline]
 slab_alloc_node mm/slub.c:3244 [inline]
 slab_alloc mm/slub.c:3252 [inline]
 kmem_cache_alloc+0x8d9/0x11a0 mm/slub.c:3257
 __d_alloc+0x87/0xc90 fs/dcache.c:1769
 d_alloc fs/dcache.c:1848 [inline]
 d_alloc_parallel+0x139/0x2570 fs/dcache.c:2600
 __lookup_slow+0x1ba/0x800 fs/namei.c:1692
 lookup_slow+0xdd/0x140 fs/namei.c:1724
 walk_component+0x50b/0x8c0 fs/namei.c:2020
 lookup_last fs/namei.c:2475 [inline]
 path_lookupat+0x30b/0x890 fs/namei.c:2499
 filename_lookup+0x36d/0xa50 fs/namei.c:2528
 user_path_at_empty+0x12c/0x410 fs/namei.c:2851
 do_readlinkat+0x175/0x5f0 fs/stat.c:443
 __do_sys_readlink fs/stat.c:476 [inline]
 __se_sys_readlink fs/stat.c:473 [inline]
 __x64_sys_readlink+0xe5/0x130 fs/stat.c:473
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:737 [inline]
 slab_alloc_node mm/slub.c:3244 [inline]
 __kmalloc_node_track_caller+0xde3/0x14f0 mm/slub.c:4972
 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:2955 [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:1987
 call_timer_fn+0x81/0x540 kernel/time/timer.c:1421
 expire_timers+0x2f5/0x6d0 kernel/time/timer.c:1466
 __run_timers+0x66b/0x9f0 kernel/time/timer.c:1734
 run_timer_softirq+0x71/0xe0 kernel/time/timer.c:1747
 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558

CPU: 1 PID: 2839 Comm: udevd Not tainted 5.17.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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