[syzbot] [wireless?] KMSAN: uninit-value in ath9k_hif_usb_reg_in_cb

From: syzbot
Date: Sun Sep 22 2024 - 19:08:39 EST

Hello,

syzbot found the following issue on:

HEAD commit: bdf56c7580d2 Merge tag 'slab-for-6.12' of git://git.kernel..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=131524a9980000
kernel config: https://syzkaller.appspot.com/x/.config?x=b82e97dfbc92f0
dashboard link: https://syzkaller.appspot.com/bug?extid=e5388ea6d2de83957e35
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b415ca186bb1/disk-bdf56c75.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4ce89ea52bab/vmlinux-bdf56c75.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9f99c9bf1bec/bzImage-bdf56c75.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e5388ea6d2de83957e35@xxxxxxxxxxxxxxxxxxxxxxxxx

=====================================================
BUG: KMSAN: uninit-value in __skb_set_length include/linux/skbuff.h:3190 [inline]
BUG: KMSAN: uninit-value in ath9k_hif_usb_reg_in_cb+0x84d/0x9b0 drivers/net/wireless/ath/ath9k/hif_usb.c:756
__skb_set_length include/linux/skbuff.h:3190 [inline]
ath9k_hif_usb_reg_in_cb+0x84d/0x9b0 drivers/net/wireless/ath/ath9k/hif_usb.c:756
__usb_hcd_giveback_urb+0x572/0x840 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x157/0x720 drivers/usb/core/hcd.c:1734
dummy_timer+0xd3f/0x6aa0 drivers/usb/gadget/udc/dummy_hcd.c:1987
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x564/0xe40 kernel/time/hrtimer.c:1755
hrtimer_interrupt+0x3ab/0x1490 kernel/time/hrtimer.c:1817
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
__sysvec_apic_timer_interrupt+0xa6/0x3a0 arch/x86/kernel/apic/apic.c:1043
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0x7e/0x90 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
__preempt_count_dec_and_test arch/x86/include/asm/preempt.h:94 [inline]
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x33/0x60 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
dummy_pullup+0x273/0x320 drivers/usb/gadget/udc/dummy_hcd.c:924
usb_gadget_disconnect_locked+0x1f8/0x5b0 drivers/usb/gadget/udc/core.c:777
gadget_unbind_driver+0xe6/0x5f0 drivers/usb/gadget/udc/core.c:1666
device_remove drivers/base/dd.c:566 [inline]
__device_release_driver drivers/base/dd.c:1272 [inline]
device_release_driver_internal+0x58a/0x990 drivers/base/dd.c:1295
driver_detach+0x360/0x540 drivers/base/dd.c:1358
bus_remove_driver+0x465/0x500 drivers/base/bus.c:742
driver_unregister+0x8d/0x100 drivers/base/driver.c:274
usb_gadget_unregister_driver+0x55/0xa0 drivers/usb/gadget/udc/core.c:1731
raw_release+0x1bc/0x400 drivers/usb/gadget/legacy/raw_gadget.c:462
__fput+0x32c/0x1120 fs/file_table.c:431
____fput+0x25/0x30 fs/file_table.c:459
task_work_run+0x268/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xce/0x170 kernel/entry/common.c:218
do_syscall_64+0xda/0x1e0 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
__alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4725
alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2263
alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2343
alloc_slab_page mm/slub.c:2413 [inline]
allocate_slab+0x320/0x12c0 mm/slub.c:2579
new_slab mm/slub.c:2632 [inline]
___slab_alloc+0x12ef/0x35e0 mm/slub.c:3819
__slab_alloc mm/slub.c:3909 [inline]
__slab_alloc_node mm/slub.c:3962 [inline]
slab_alloc_node mm/slub.c:4123 [inline]
kmem_cache_alloc_noprof+0x57a/0xb20 mm/slub.c:4142
skb_clone+0x303/0x550 net/core/skbuff.c:2084
dev_queue_xmit_nit+0x4d0/0x12a0 net/core/dev.c:2315
xmit_one net/core/dev.c:3584 [inline]
dev_hard_start_xmit+0x17d/0xa20 net/core/dev.c:3604
__dev_queue_xmit+0x3576/0x55e0 net/core/dev.c:4424
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
neigh_connected_output+0x5a0/0x690 net/core/neighbour.c:1594
neigh_output include/net/neighbour.h:542 [inline]
ip6_finish_output2+0x2347/0x2ba0 net/ipv6/ip6_output.c:141
__ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
ip6_finish_output+0xbb8/0x14b0 net/ipv6/ip6_output.c:226
NF_HOOK_COND include/linux/netfilter.h:303 [inline]
ip6_output+0x356/0x620 net/ipv6/ip6_output.c:247
dst_output include/net/dst.h:450 [inline]
NF_HOOK include/linux/netfilter.h:314 [inline]
ndisc_send_skb+0xb9f/0x14c0 net/ipv6/ndisc.c:511
ndisc_send_rs+0x97e/0xae0 net/ipv6/ndisc.c:721
addrconf_rs_timer+0x488/0x6f0 net/ipv6/addrconf.c:4042
call_timer_fn+0x49/0x580 kernel/time/timer.c:1794
expire_timers kernel/time/timer.c:1845 [inline]
__run_timers kernel/time/timer.c:2419 [inline]
__run_timer_base+0x84e/0xe90 kernel/time/timer.c:2430
run_timer_base kernel/time/timer.c:2439 [inline]
run_timer_softirq+0x3a/0x70 kernel/time/timer.c:2449
handle_softirqs+0x1a0/0x7c0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0x68/0x120 kernel/softirq.c:637
irq_exit_rcu+0x12/0x20 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
sysvec_apic_timer_interrupt+0x83/0x90 arch/x86/kernel/apic/apic.c:1037
asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702

CPU: 0 UID: 0 PID: 7385 Comm: syz.1.489 Tainted: G W 6.11.0-syzkaller-04744-gbdf56c7580d2 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
=====================================================


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