diff options
| author | Kees Cook <kees.cook@canonical.com> | 2010-10-11 11:28:16 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 10:22:08 -0700 |
| commit | 3ed780117dbe5acb64280d218f0347f238dafed0 (patch) | |
| tree | 982370602556fe88c5c110529ab9d426a5b72254 /drivers/usb/misc | |
| parent | cfb8da8f69b81d367b766888e83ec0483a31bf01 (diff) | |
| download | lwn-3ed780117dbe5acb64280d218f0347f238dafed0.tar.gz lwn-3ed780117dbe5acb64280d218f0347f238dafed0.zip | |
usb: iowarrior: don't trust report_size for buffer size
If the iowarrior devices in this case statement support more than 8 bytes
per report, it is possible to write past the end of a kernel heap allocation.
This will probably never be possible, but change the allocation to be more
defensive anyway.
Signed-off-by: Kees Cook <kees.cook@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/misc')
| -rw-r--r-- | drivers/usb/misc/iowarrior.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c index bc88c79875a1..8ed8d05750d4 100644 --- a/drivers/usb/misc/iowarrior.c +++ b/drivers/usb/misc/iowarrior.c @@ -374,7 +374,7 @@ static ssize_t iowarrior_write(struct file *file, case USB_DEVICE_ID_CODEMERCS_IOWPV2: case USB_DEVICE_ID_CODEMERCS_IOW40: /* IOW24 and IOW40 use a synchronous call */ - buf = kmalloc(8, GFP_KERNEL); /* 8 bytes are enough for both products */ + buf = kmalloc(count, GFP_KERNEL); if (!buf) { retval = -ENOMEM; goto exit; |