diff options
| author |   Johan Hovold <johan@kernel.org> | 2019-10-22 16:32:03 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-28 17:46:23 +0100 |
| commit | 88f6bf3846ee90bf33aa1ce848cd3bfb3229f4a4 (patch) | |
| tree | 1d5f5841dab019a4e471c361bec4b5632b04b91a /drivers/usb | |
| parent | USB: ldusb: fix ring-buffer locking (diff) | |
| download | linux-dev-88f6bf3846ee90bf33aa1ce848cd3bfb3229f4a4.tar.xz linux-dev-88f6bf3846ee90bf33aa1ce848cd3bfb3229f4a4.zip | |
USB: ldusb: use unsigned size format specifiers
A recent info-leak bug manifested itself along with warning about a
negative buffer overflow:
ldusb 1-1:0.28: Read buffer overflow, -131383859965943 bytes dropped
when it was really a rather large positive one.
A sanity check that prevents this has now been put in place, but let's
fix up the size format specifiers, which should all be unsigned.
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191022143203.5260-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/misc/ldusb.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c index c3e764909fd0..dd1ea25e42b1 100644 --- a/drivers/usb/misc/ldusb.c +++ b/drivers/usb/misc/ldusb.c @@ -487,7 +487,7 @@ static ssize_t ld_usb_read(struct file *file, char __user *buffer, size_t count, } bytes_to_read = min(count, *actual_buffer); if (bytes_to_read < *actual_buffer) - dev_warn(&dev->intf->dev, "Read buffer overflow, %zd bytes dropped\n", + dev_warn(&dev->intf->dev, "Read buffer overflow, %zu bytes dropped\n", *actual_buffer-bytes_to_read); /* copy one interrupt_in_buffer from ring_buffer into userspace */ @@ -562,8 +562,9 @@ static ssize_t ld_usb_write(struct file *file, const char __user *buffer, /* write the data into interrupt_out_buffer from userspace */ bytes_to_write = min(count, write_buffer_size*dev->interrupt_out_endpoint_size); if (bytes_to_write < count) - dev_warn(&dev->intf->dev, "Write buffer overflow, %zd bytes dropped\n", count-bytes_to_write); - dev_dbg(&dev->intf->dev, "%s: count = %zd, bytes_to_write = %zd\n", + dev_warn(&dev->intf->dev, "Write buffer overflow, %zu bytes dropped\n", + count - bytes_to_write); + dev_dbg(&dev->intf->dev, "%s: count = %zu, bytes_to_write = %zu\n", __func__, count, bytes_to_write); if (copy_from_user(dev->interrupt_out_buffer, buffer, bytes_to_write)) { |