[syzbot] [wireless?] KMSAN: uninit-value in ath9k_hw_init

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    944070199c5e kmsan: add memsetXX tests
git tree:       https://github.com/google/kmsan.git master
console+strace: https://syzkaller.appspot.com/x/log.txt?x=172481f2c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=46c642641b9ef616
dashboard link: https://syzkaller.appspot.com/bug?extid=df61b36319e045c00a08
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15055432c80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1010b19cc80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/055bbd57e905/disk-94407019.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/82472690bcfe/vmlinux-94407019.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db3f379532ab/bzImage-94407019.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+df61b36319e045c00a08@xxxxxxxxxxxxxxxxxxxxxxxxx

ath9k_htc 6-1:1.0: ath9k_htc: HTC initialized with 33 credits
=====================================================
BUG: KMSAN: uninit-value in ath9k_hw_read_revisions drivers/net/wireless/ath/ath9k/hw.c:289 [inline]
BUG: KMSAN: uninit-value in __ath9k_hw_init drivers/net/wireless/ath/ath9k/hw.c:572 [inline]
BUG: KMSAN: uninit-value in ath9k_hw_init+0x11e0/0x2d60 drivers/net/wireless/ath/ath9k/hw.c:700
 ath9k_hw_read_revisions drivers/net/wireless/ath/ath9k/hw.c:289 [inline]
 __ath9k_hw_init drivers/net/wireless/ath/ath9k/hw.c:572 [inline]
 ath9k_hw_init+0x11e0/0x2d60 drivers/net/wireless/ath/ath9k/hw.c:700
 ath9k_init_priv drivers/net/wireless/ath/ath9k/htc_drv_init.c:662 [inline]
 ath9k_init_device drivers/net/wireless/ath/ath9k/htc_drv_init.c:839 [inline]
 ath9k_htc_probe_device+0xf48/0x3b60 drivers/net/wireless/ath/ath9k/htc_drv_init.c:963
 ath9k_htc_hw_init+0x4f/0x100 drivers/net/wireless/ath/ath9k/htc_hst.c:521
 ath9k_hif_usb_firmware_cb+0x2eb/0x800 drivers/net/wireless/ath/ath9k/hif_usb.c:1243
 request_firmware_work_func+0x130/0x240 drivers/base/firmware_loader/main.c:1107
 process_one_work+0xb0d/0x1410 kernel/workqueue.c:2289
 worker_thread+0x107b/0x1d60 kernel/workqueue.c:2436
 kthread+0x31f/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Local variable val created at:
 ath9k_regread+0x62/0x1b0 drivers/net/wireless/ath/ath9k/htc_drv_init.c:239
 ath9k_hw_read_revisions drivers/net/wireless/ath/ath9k/hw.c:287 [inline]
 __ath9k_hw_init drivers/net/wireless/ath/ath9k/hw.c:572 [inline]
 ath9k_hw_init+0x5be/0x2d60 drivers/net/wireless/ath/ath9k/hw.c:700

CPU: 0 PID: 115 Comm: kworker/0:2 Not tainted 6.2.0-syzkaller-81157-g944070199c5e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Workqueue: events request_firmware_work_func
=====================================================


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