From ad93375a30334cd97a61f7076d242e1cfdb66abc Mon Sep 17 00:00:00 2001 From: Pete Zaitcev Date: Mon, 22 May 2006 21:49:44 -0700 Subject: [PATCH] [PATCH] usb: io_edgeport, cleanup to unicode handling Clean up the unicode handling in io_edgeport. Make get_string size-limited. Signed-off-by: Pete Zaitcev Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_edgeport.c | 42 ++++++++++++++++++++------------ 1 file changed, 26 insertions(+), 16 deletions(-) diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index b606c5968102..c28f1f6902c3 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -142,7 +142,7 @@ struct edgeport_port { /* This structure holds all of the individual device information */ struct edgeport_serial { - char name[MAX_NAME_LEN+1]; /* string name of this device */ + char name[MAX_NAME_LEN+2]; /* string name of this device */ struct edge_manuf_descriptor manuf_descriptor; /* the manufacturer descriptor */ struct edge_boot_descriptor boot_descriptor; /* the boot firmware descriptor */ @@ -270,7 +270,7 @@ static void get_manufacturing_desc (struct edgeport_serial *edge_serial); static void get_boot_desc (struct edgeport_serial *edge_serial); static void load_application_firmware (struct edgeport_serial *edge_serial); -static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size); +static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size); // ************************************************************************ @@ -373,7 +373,7 @@ static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial) * Get string descriptor from device * * * ************************************************************************/ -static int get_string (struct usb_device *dev, int Id, char *string) +static int get_string (struct usb_device *dev, int Id, char *string, int buflen) { struct usb_string_descriptor StringDesc; struct usb_string_descriptor *pStringDesc; @@ -395,7 +395,7 @@ static int get_string (struct usb_device *dev, int Id, char *string) return 0; } - unicode_to_ascii(string, pStringDesc->wData, pStringDesc->bLength/2-1); + unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2); kfree(pStringDesc); return strlen(string); @@ -2564,16 +2564,20 @@ static void change_port_settings (struct edgeport_port *edge_port, struct termio * ASCII range, but it's only for debugging... * NOTE: expects the unicode in LE format ****************************************************************************/ -static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size) +static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size) { int i; - if (unicode_size <= 0) + if (buflen <= 0) /* never happens, but... */ return; + --buflen; /* space for nul */ - for (i = 0; i < unicode_size; ++i) + for (i = 0; i < unicode_size; i++) { + if (i >= buflen) + break; string[i] = (char)(le16_to_cpu(unicode[i])); - string[unicode_size] = 0x00; + } + string[i] = 0x00; } @@ -2603,11 +2607,17 @@ static void get_manufacturing_desc (struct edgeport_serial *edge_serial) dbg(" BoardRev: %d", edge_serial->manuf_descriptor.BoardRev); dbg(" NumPorts: %d", edge_serial->manuf_descriptor.NumPorts); dbg(" DescDate: %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900); - unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1); + unicode_to_ascii(string, 30, + edge_serial->manuf_descriptor.SerialNumber, + edge_serial->manuf_descriptor.SerNumLength/2); dbg(" SerialNumber: %s", string); - unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1); + unicode_to_ascii(string, 30, + edge_serial->manuf_descriptor.AssemblyNumber, + edge_serial->manuf_descriptor.AssemblyNumLength/2); dbg(" AssemblyNumber: %s", string); - unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1); + unicode_to_ascii(string, 30, + edge_serial->manuf_descriptor.OemAssyNumber, + edge_serial->manuf_descriptor.OemAssyNumLength/2); dbg(" OemAssyNumber: %s", string); dbg(" UartType: %d", edge_serial->manuf_descriptor.UartType); dbg(" IonPid: %d", edge_serial->manuf_descriptor.IonPid); @@ -2735,11 +2745,11 @@ static int edge_startup (struct usb_serial *serial) usb_set_serial_data(serial, edge_serial); /* get the name for the device from the device */ - if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) { - edge_serial->name[i-1] = ' '; - } - - get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]); + i = get_string(dev, dev->descriptor.iManufacturer, + &edge_serial->name[0], MAX_NAME_LEN+1); + edge_serial->name[i++] = ' '; + get_string(dev, dev->descriptor.iProduct, + &edge_serial->name[i], MAX_NAME_LEN+2 - i); dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name); -- 2.20.1