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| author | Alan Stern <stern@rowland.harvard.edu> | 2009-12-07 16:47:43 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-11 11:55:26 -0800 |
| commit | f3f6faa9edf67c1018270793e0547b0f81abb47e (patch) | |
| tree | b3f9466d4cca6ee280917190b346bfe3a1a790e3 /drivers/usb | |
| parent | a0bb108112a872c0b0c4b3ef4974f95fb75b155d (diff) | |
| download | linux-stable-f3f6faa9edf67c1018270793e0547b0f81abb47e.tar.gz linux-stable-f3f6faa9edf67c1018270793e0547b0f81abb47e.tar.bz2 linux-stable-f3f6faa9edf67c1018270793e0547b0f81abb47e.zip | |
USB: usb-storage: fix bug in fill_inquiry
This patch (as1312) fixes a minor bug in usb-storage. The
fill_inquiry() routine neglects to pre-load the inquiry data buffer
with spaces. As a result, if the vendor name is shorter than 8
characters or the product name is shorter than 16, the remainder will
be filled with garbage.
The patch also removes some unnecessary calls to strlen().
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/storage/usb.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index f5c0264caa33..5a53d4f0dd11 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -232,6 +232,7 @@ void fill_inquiry_response(struct us_data *us, unsigned char *data, if (data_len<36) // You lose. return; + memset(data+8, ' ', 28); if(data[0]&0x20) { /* USB device currently not connected. Return peripheral qualifier 001b ("...however, the physical device is not currently connected @@ -241,15 +242,15 @@ void fill_inquiry_response(struct us_data *us, unsigned char *data, device, it may return zeros or ASCII spaces (20h) in those fields until the data is available from the device."). */ - memset(data+8,0,28); } else { u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice); - memcpy(data+8, us->unusual_dev->vendorName, - strlen(us->unusual_dev->vendorName) > 8 ? 8 : - strlen(us->unusual_dev->vendorName)); - memcpy(data+16, us->unusual_dev->productName, - strlen(us->unusual_dev->productName) > 16 ? 16 : - strlen(us->unusual_dev->productName)); + int n; + + n = strlen(us->unusual_dev->vendorName); + memcpy(data+8, us->unusual_dev->vendorName, min(8, n)); + n = strlen(us->unusual_dev->productName); + memcpy(data+16, us->unusual_dev->productName, min(16, n)); + data[32] = 0x30 + ((bcdDevice>>12) & 0x0F); data[33] = 0x30 + ((bcdDevice>>8) & 0x0F); data[34] = 0x30 + ((bcdDevice>>4) & 0x0F); |