diff options
| author | Kevin McKinney <klmckinney1@gmail.com> | 2011-09-18 18:34:46 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-09-19 10:46:17 -0700 |
| commit | 5ac5bd8754b3dabcf4aea7b5f4a28a1d8494a1b0 (patch) | |
| tree | 06f2a5c39a9158f62c9cf78addb4269cd2c8e54f /drivers/staging | |
| parent | 7518b9b8fc72a6c0ba67f33bdd4689c7dd28686a (diff) | |
Staging: bcm: Add size minimum size restrictions for IOCTL_IDLE_REQ
If IoBuffer.InputLength is zero then this will cause an Oops when
we dereference the ZERO_SIZE_PTR. Or if it's smaller than
sizeof(struct link_request) then we would get memory corruption
when we set ->PLength in CopyBufferToControlPacket().
Signed-off-by: Kevin McKinney <klmckinney1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/bcm/Bcmchar.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/staging/bcm/Bcmchar.c b/drivers/staging/bcm/Bcmchar.c index 6f8a75dc1ef..1905a83b338 100644 --- a/drivers/staging/bcm/Bcmchar.c +++ b/drivers/staging/bcm/Bcmchar.c @@ -687,7 +687,9 @@ static long bcm_char_ioctl(struct file *filp, UINT cmd, ULONG arg) if (copy_from_user(&IoBuffer, argp, sizeof(IOCTL_BUFFER))) return -EFAULT; - /* FIXME: don't accept any length from user */ + if (IoBuffer.InputLength < sizeof(struct link_request)) + return -EINVAL; + pvBuffer = kmalloc(IoBuffer.InputLength, GFP_KERNEL); if (!pvBuffer) return -ENOMEM; |