linux-kernel - [syzbot] KMSAN: uninit-value in iforce_init

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Date:   Mon, 07 Nov 2022 01:43:41 -0800
From:   syzbot <syzbot+4dd880c1184280378821@...kaller.appspotmail.com>
To:     dmitry.torokhov@...il.com, glider@...gle.com,
        greg.iforce@...il.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] KMSAN: uninit-value in iforce_init_device (2)

Hello,

syzbot found the following issue on:

HEAD commit:    968c2729e576 x86: kmsan: fix comment in kmsan_shadow.c
git tree:       https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=14efb852880000
kernel config:  https://syzkaller.appspot.com/x/.config?x=131312b26465c190
dashboard link: https://syzkaller.appspot.com/bug?extid=4dd880c1184280378821
compiler:       clang version 15.0.0 (https://github.com/llvm/llvm-project.git 610139d2d9ce6746b3c617fb3e2f7886272d26ff), GNU ld (GNU Binutils for Debian) 2.35.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/56b19fc61d98/disk-968c2729.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b048b309a6e5/vmlinux-968c2729.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4dd880c1184280378821@...kaller.appspotmail.com

iforce 1-1:0.0: usb_submit_urb failed: -71
iforce 1-1:0.0: usb_submit_urb failed: -71
iforce 1-1:0.0: usb_submit_urb failed: -71
=====================================================
BUG: KMSAN: uninit-value in iforce_init_device+0x1bd5/0x2010 drivers/input/joystick/iforce/iforce-main.c:297
 iforce_init_device+0x1bd5/0x2010 drivers/input/joystick/iforce/iforce-main.c:297
 iforce_usb_probe+0xc86/0x11c0 drivers/input/joystick/iforce/iforce-usb.c:238
 usb_probe_interface+0xc4b/0x11f0 drivers/usb/core/driver.c:396
 really_probe+0x506/0x1000 drivers/base/dd.c:639
 __driver_probe_device+0x2fa/0x3d0 drivers/base/dd.c:778
 driver_probe_device+0x72/0x7a0 drivers/base/dd.c:808
 __device_attach_driver+0x548/0x8e0 drivers/base/dd.c:936
 bus_for_each_drv+0x1fc/0x360 drivers/base/bus.c:427
 __device_attach+0x42a/0x720 drivers/base/dd.c:1008
 device_initial_probe+0x2e/0x40 drivers/base/dd.c:1057
 bus_probe_device+0x13c/0x3b0 drivers/base/bus.c:487
 device_add+0x1d4b/0x26c0 drivers/base/core.c:3517
 usb_set_configuration+0x30f8/0x37e0 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x105/0x290 drivers/usb/core/generic.c:238
 usb_probe_device+0x288/0x490 drivers/usb/core/driver.c:293
 really_probe+0x506/0x1000 drivers/base/dd.c:639
 __driver_probe_device+0x2fa/0x3d0 drivers/base/dd.c:778
 driver_probe_device+0x72/0x7a0 drivers/base/dd.c:808
 __device_attach_driver+0x548/0x8e0 drivers/base/dd.c:936
 bus_for_each_drv+0x1fc/0x360 drivers/base/bus.c:427
 __device_attach+0x42a/0x720 drivers/base/dd.c:1008
 device_initial_probe+0x2e/0x40 drivers/base/dd.c:1057
 bus_probe_device+0x13c/0x3b0 drivers/base/bus.c:487
 device_add+0x1d4b/0x26c0 drivers/base/core.c:3517
 usb_new_device+0x17ac/0x2370 drivers/usb/core/hub.c:2573
 hub_port_connect drivers/usb/core/hub.c:5353 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
 port_event drivers/usb/core/hub.c:5653 [inline]
 hub_event+0x5589/0x8080 drivers/usb/core/hub.c:5735
 process_one_work+0xb27/0x13e0 kernel/workqueue.c:2289
 worker_thread+0x1076/0x1d60 kernel/workqueue.c:2436
 kthread+0x31b/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30

Local variable buf created at:
 iforce_init_device+0x5a/0x2010 drivers/input/joystick/iforce/iforce-main.c:217
 iforce_usb_probe+0xc86/0x11c0 drivers/input/joystick/iforce/iforce-usb.c:238

CPU: 0 PID: 15409 Comm: kworker/0:2 Not tainted 6.0.0-rc5-syzkaller-48543-g968c2729e576 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
Workqueue: usb_hub_wq hub_event
=====================================================


---
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