Re: WARNING in usbtouch_reset_resume

[Andrey Konovalov]

On Mon, Aug 5, 2019 at 1:58 PM syzbot
<syzbot+91f7bbcce580376d784e@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello,
>
> syzbot found the following crash on:
>
> HEAD commit:    e96407b4 usb-fuzzer: main usb gadget fuzzer driver
> git tree:       https://github.com/google/kasan.git usb-fuzzer
> console output: https://syzkaller.appspot.com/x/log.txt?x=1104baf8600000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e
> dashboard link: https://syzkaller.appspot.com/bug?extid=91f7bbcce580376d784e
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14199a62600000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17d94aaa600000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+91f7bbcce580376d784e@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> input: USB Touchscreen 0eef:0002 as
> /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.180/input/input5
> usb 1-1: reset high-speed USB device number 2 using dummy_hcd
> usb 1-1: Using ep0 maxpacket: 32
> ------------[ cut here ]------------
> DEBUG_LOCKS_WARN_ON(lock->magic != lock)
> WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:912 __mutex_lock_common
> kernel/locking/mutex.c:912 [inline]
> WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:912
> __mutex_lock+0xd31/0x1360 kernel/locking/mutex.c:1077
> Kernel panic - not syncing: panic_on_warn set ...
> CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc2+ #25
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: usb_hub_wq hub_event
> Call Trace:
>   __dump_stack lib/dump_stack.c:77 [inline]
>   dump_stack+0xca/0x13e lib/dump_stack.c:113
>   panic+0x2a3/0x6da kernel/panic.c:219
>   __warn.cold+0x20/0x4a kernel/panic.c:576
>   report_bug+0x262/0x2a0 lib/bug.c:186
>   fixup_bug arch/x86/kernel/traps.c:179 [inline]
>   fixup_bug arch/x86/kernel/traps.c:174 [inline]
>   do_error_trap+0x12b/0x1e0 arch/x86/kernel/traps.c:272
>   do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291
>   invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026
> RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:912 [inline]
> RIP: 0010:__mutex_lock+0xd31/0x1360 kernel/locking/mutex.c:1077
> Code: d2 0f 85 f6 05 00 00 44 8b 05 7b de 1c 02 45 85 c0 0f 85 0a f4 ff ff
> 48 c7 c6 c0 92 c6 85 48 c7 c7 60 90 c6 85 e8 f4 c4 a6 fb <0f> 0b e9 f0 f3
> ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48
> RSP: 0018:ffff8881da20f6b0 EFLAGS: 00010286
> RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff8128a0fd RDI: ffffed103b441ec8
> RBP: ffff8881da20f820 R08: ffff8881da1f9800 R09: fffffbfff0d9ee35
> R10: fffffbfff0d9ee34 R11: ffffffff86cf71a3 R12: 0000000000000000
> R13: dffffc0000000000 R14: ffff8881d2e291c8 R15: ffff8881d2fba228
>   usbtouch_reset_resume+0xb1/0x170
> drivers/input/touchscreen/usbtouchscreen.c:1611
>   usb_resume_interface drivers/usb/core/driver.c:1242 [inline]
>   usb_resume_interface.isra.0+0x184/0x390 drivers/usb/core/driver.c:1210
>   usb_resume_both+0x26a/0x7b0 drivers/usb/core/driver.c:1412
>   __rpm_callback+0x27e/0x3c0 drivers/base/power/runtime.c:355
>   rpm_callback+0x18f/0x230 drivers/base/power/runtime.c:485
>   rpm_resume+0x10f7/0x1870 drivers/base/power/runtime.c:849
>   __pm_runtime_resume+0x103/0x180 drivers/base/power/runtime.c:1076
>   pm_runtime_get_sync include/linux/pm_runtime.h:226 [inline]
>   usb_autoresume_device+0x1e/0x60 drivers/usb/core/driver.c:1599
>   usb_remote_wakeup+0x7b/0xb0 drivers/usb/core/hub.c:3603
>   hub_port_connect_change drivers/usb/core/hub.c:5199 [inline]
>   port_event drivers/usb/core/hub.c:5359 [inline]
>   hub_event+0x246c/0x3640 drivers/usb/core/hub.c:5441
>   process_one_work+0x92b/0x1530 kernel/workqueue.c:2269
>   worker_thread+0x96/0xe20 kernel/workqueue.c:2415
>   kthread+0x318/0x420 kernel/kthread.c:255
>   ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
> Kernel Offset: disabled
> Rebooting in 86400 seconds..

#syz dup: WARNING in usbtouch_open

>
>
> ---
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