Re: WARNING in usbhid_raw_request/usb_submit_urb

[Andrey Konovalov]

On Tue, Jul 30, 2019 at 6:58 PM syzbot
<syzbot+a7a6b9c609b9457c62c6@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> syzbot has found a reproducer for the following crash on:
>
> HEAD commit:    7f7867ff 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=10619cec600000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=792eb47789f57810
> dashboard link: https://syzkaller.appspot.com/bug?extid=a7a6b9c609b9457c62c6
> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10606c42600000
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+a7a6b9c609b9457c62c6@xxxxxxxxxxxxxxxxxxxxxxxxx

Let's try Hillf's patch here as well:

#syz test: https://github.com/google/kasan.git 7f7867ff

>
> ------------[ cut here ]------------
> usb 2-1: BOGUS urb xfer, pipe 2 != type 2
> WARNING: CPU: 1 PID: 7429 at drivers/usb/core/urb.c:477
> usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
> Kernel panic - not syncing: panic_on_warn set ...
> CPU: 1 PID: 7429 Comm: syz-executor.1 Not tainted 5.3.0-rc2+ #23
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> 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:usb_submit_urb+0x1188/0x13b0 drivers/usb/core/urb.c:477
> Code: 4d 85 ed 74 2c e8 38 e8 ed fd 4c 89 f7 e8 70 dc 1a ff 41 89 d8 44 89
> e1 4c 89 ea 48 89 c6 48 c7 c7 60 cc f8 85 e8 4d b9 c3 fd <0f> 0b e9 20 f4
> ff ff e8 0c e8 ed fd 4c 89 f2 48 b8 00 00 00 00 00
> RSP: 0018:ffff8881cef0f9d0 EFLAGS: 00010282
> RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: ffffffff812830fd RDI: ffffed1039de1f2c
> RBP: 0000000000000000 R08: ffff8881c853e000 R09: fffffbfff115e1a2
> R10: fffffbfff115e1a1 R11: ffffffff88af0d0f R12: 0000000000000002
> R13: ffff8881d976b0a8 R14: ffff8881d0e02b20 R15: ffff8881d1720600
>   usb_start_wait_urb+0x108/0x2b0 drivers/usb/core/message.c:57
>   usb_internal_control_msg drivers/usb/core/message.c:101 [inline]
>   usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152
>   usbhid_set_raw_report drivers/hid/usbhid/hid-core.c:917 [inline]
>   usbhid_raw_request+0x21f/0x640 drivers/hid/usbhid/hid-core.c:1265
>   hid_hw_raw_request include/linux/hid.h:1079 [inline]
>   hidraw_send_report+0x296/0x500 drivers/hid/hidraw.c:151
>   hidraw_ioctl+0x5b4/0xae0 drivers/hid/hidraw.c:421
>   vfs_ioctl fs/ioctl.c:46 [inline]
>   file_ioctl fs/ioctl.c:509 [inline]
>   do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696
>   ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713
>   __do_sys_ioctl fs/ioctl.c:720 [inline]
>   __se_sys_ioctl fs/ioctl.c:718 [inline]
>   __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718
>   do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
>   entry_SYSCALL_64_after_hwframe+0x49/0xbe
> RIP: 0033:0x459829
> Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7
> 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff
> ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
> RSP: 002b:00007f6a91f44c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829
> RDX: 0000000020000240 RSI: 00000000c0404806 RDI: 0000000000000004
> RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6a91f456d4
> R13: 00000000004c22c3 R14: 00000000004d5688 R15: 00000000ffffffff
> Kernel Offset: disabled
> Rebooting in 86400 seconds..
>
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -1410,6 +1410,7 @@ static void usbhid_disconnect(struct usb
 	spin_lock_irq(&usbhid->lock);	/* Sync with error and led handlers */
 	set_bit(HID_DISCONNECTED, &usbhid->iofl);
 	spin_unlock_irq(&usbhid->lock);
+	hid_hw_stop(hid);
 	hid_destroy_device(hid);
 	kfree(usbhid);
 }