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authorAlan Stern <stern@rowland.harvard.edu>2009-12-08 00:47:43 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2009-12-11 22:55:26 +0300
commitf3f6faa9edf67c1018270793e0547b0f81abb47e (patch)
treeb3f9466d4cca6ee280917190b346bfe3a1a790e3 /drivers/usb
parenta0bb108112a872c0b0c4b3ef4974f95fb75b155d (diff)
downloadlinux-f3f6faa9edf67c1018270793e0547b0f81abb47e.tar.xz
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.c15
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);