• Alan Stern's avatar
    media: mceusb: Use new usb_control_msg_*() routines · 608e58a0
    Alan Stern authored
    Automatic kernel fuzzing led to a WARN about invalid pipe direction in
    the mceusb driver:
    
    ------------[ cut here ]------------
    usb 6-1: BOGUS control dir, pipe 80000380 doesn't match bRequestType 40
    WARNING: CPU: 0 PID: 2465 at drivers/usb/core/urb.c:410
    usb_submit_urb+0x1326/0x1820 drivers/usb/core/urb.c:410
    Modules linked in:
    CPU: 0 PID: 2465 Comm: kworker/0:2 Not tainted 5.19.0-rc4-00208-g69cb6c65 #1
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
    1.13.0-1ubuntu1.1 04/01/2014
    Workqueue: usb_hub_wq hub_event
    RIP: 0010:usb_submit_urb+0x1326/0x1820 drivers/usb/core/urb.c:410
    Code: 7c 24 40 e8 ac 23 91 fd 48 8b 7c 24 40 e8 b2 70 1b ff 45 89 e8
    44 89 f1 4c 89 e2 48 89 c6 48 c7 c7 a0 30 a9 86 e8 48 07 11 02 <0f> 0b
    e9 1c f0 ff ff e8 7e 23 91 fd 0f b6 1d 63 22 83 05 31 ff 41
    RSP: 0018:ffffc900032becf0 EFLAGS: 00010282
    RAX: 0000000000000000 RBX: ffff8881100f3058 RCX: 0000000000000000
    RDX: ffffc90004961000 RSI: ffff888114c6d580 RDI: fffff52000657d90
    RBP: ffff888105ad90f0 R08: ffffffff812c3638 R09: 0000000000000000
    R10: 0000000000000005 R11: ffffed1023504ef1 R12: ffff888105ad9000
    R13: 0000000000000040 R14: 0000000080000380 R15: ffff88810ba96500
    FS: 0000000000000000(0000) GS:ffff88811a800000(0000) knlGS:0000000000000000
    CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: 00007ffe810bda58 CR3: 000000010b720000 CR4: 0000000000350ef0
    Call Trace:
    <TASK>
    usb_start_wait_urb+0x101/0x4c0 drivers/usb/core/message.c:58
    usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
    usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153
    mceusb_gen1_init drivers/media/rc/mceusb.c:1431 [inline]
    mceusb_dev_probe+0x258e/0x33f0 drivers/media/rc/mceusb.c:1807
    
    The reason for the warning is clear enough; the driver sends an
    unusual read request on endpoint 0 but does not set the USB_DIR_IN bit
    in the bRequestType field.
    
    More importantly, the whole situation can be avoided and the driver
    simplified by converting it over to the relatively new
    usb_control_msg_recv() and usb_control_msg_send() routines.  That's
    what this fix does.
    
    Link: https://lore.kernel.org/all/CAB7eexLLApHJwZfMQ=X-PtRhw0BgO+5KcSMS05FNUYejJXqtSA@mail.gmail.com/
    Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
    Cc: stable@vger.kernel.org
    Reported-and-tested-by: default avatarRondreis <linhaoguo86@gmail.com>
    Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
    Link: https://lore.kernel.org/r/YwkfnBFCSEVC6XZu@rowland.harvard.eduSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    608e58a0
mceusb.c 53.6 KB