meta-agl-bsp/meta-renesas/recipes-kernel/linux/linux/0003-media-r820t-avoid-potential-memcpy-buffer-overflow-i.patch

   1 From 757d7ace565c06e1302ba7c9244d839455e13881 Mon Sep 17 00:00:00 2001
   2 From: Gianluca Gennari <gennarone@gmail.com>
   3 Date: Sun, 2 Jun 2013 14:31:19 -0300
   4 Subject: [PATCH 3/3] [media] r820t: avoid potential memcpy buffer overflow in
   5  shadow_store()
   6
   7 The memcpy in shadow_store() could exceed buffer limits when r > 0.
   8
   9 Signed-off-by: Gianluca Gennari <gennarone@gmail.com>
  10 Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
  11 Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
  12 ---
  13  drivers/media/tuners/r820t.c | 4 ++--
  14  1 file changed, 2 insertions(+), 2 deletions(-)
  15
  16 diff --git a/drivers/media/tuners/r820t.c b/drivers/media/tuners/r820t.c
  17 index 63062a9..0a5f96b 100644
  18 --- a/drivers/media/tuners/r820t.c
  19 +++ b/drivers/media/tuners/r820t.c
  20 @@ -364,8 +364,8 @@ static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val,
  21         }
  22         if (len <= 0)
  23                 return;
  24 -       if (len > NUM_REGS)
  25 -               len = NUM_REGS;
  26 +       if (len > NUM_REGS - r)
  27 +               len = NUM_REGS - r;
  28
  29         tuner_dbg("%s: prev  reg=%02x len=%d: %*ph\n",
  30                   __func__, r + REG_SHADOW_START, len, len, val);
  31 --
  32 2.9.2
  33