diff mbox

atomisp: array underflow in ioctl

Message ID 20170717075854.cmn2dgijylvpqdsp@mwanda (mailing list archive)
State New, archived
Headers show

Commit Message

Dan Carpenter July 17, 2017, 7:58 a.m. UTC 
I noticed an array underflow in ov5693_enum_frame_size().  The code
looks like this:

	int index = fse->index;

	if (index >= N_RES)
		retur -EINVAL;

fse->index is a u32 that comes from the user.  We want negative values
to be counted as -EINVAL but they aren't.  There are several ways to fix
this but I feel like the best fix for future proofing is to change the
type of N_RES from int to unsigned long to make it the same as if we
were comparing against ARRAY_SIZE().

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff mbox

Patch

diff --git a/drivers/staging/media/atomisp/i2c/gc0310.h b/drivers/staging/media/atomisp/i2c/gc0310.h
index f31eb277f542..7d8a0aeecb6c 100644
--- a/drivers/staging/media/atomisp/i2c/gc0310.h
+++ b/drivers/staging/media/atomisp/i2c/gc0310.h
@@ -454,6 +454,6 @@  struct gc0310_resolution gc0310_res_video[] = {
 #define N_RES_VIDEO (ARRAY_SIZE(gc0310_res_video))
 
 static struct gc0310_resolution *gc0310_res = gc0310_res_preview;
-static int N_RES = N_RES_PREVIEW;
+static unsigned long N_RES = N_RES_PREVIEW;
 #endif
 
diff --git a/drivers/staging/media/atomisp/i2c/gc2235.h b/drivers/staging/media/atomisp/i2c/gc2235.h
index ccbc757045a5..7c3d994180cc 100644
--- a/drivers/staging/media/atomisp/i2c/gc2235.h
+++ b/drivers/staging/media/atomisp/i2c/gc2235.h
@@ -668,5 +668,5 @@  struct gc2235_resolution gc2235_res_video[] = {
 #define N_RES_VIDEO (ARRAY_SIZE(gc2235_res_video))
 
 static struct gc2235_resolution *gc2235_res = gc2235_res_preview;
-static int N_RES = N_RES_PREVIEW;
+static unsigned long N_RES = N_RES_PREVIEW;
 #endif
diff --git a/drivers/staging/media/atomisp/i2c/ov2680.h b/drivers/staging/media/atomisp/i2c/ov2680.h
index 944fe8e3bcbf..ab8907e6c9ef 100644
--- a/drivers/staging/media/atomisp/i2c/ov2680.h
+++ b/drivers/staging/media/atomisp/i2c/ov2680.h
@@ -934,7 +934,6 @@  static struct ov2680_resolution ov2680_res_video[] = {
 #define N_RES_VIDEO (ARRAY_SIZE(ov2680_res_video))
 
 static struct ov2680_resolution *ov2680_res = ov2680_res_preview;
-static int N_RES = N_RES_PREVIEW;
-
+static unsigned long N_RES = N_RES_PREVIEW;
 
 #endif
diff --git a/drivers/staging/media/atomisp/i2c/ov2722.h b/drivers/staging/media/atomisp/i2c/ov2722.h
index b0d40965d89e..73ecb1679718 100644
--- a/drivers/staging/media/atomisp/i2c/ov2722.h
+++ b/drivers/staging/media/atomisp/i2c/ov2722.h
@@ -1263,5 +1263,5 @@  struct ov2722_resolution ov2722_res_video[] = {
 #define N_RES_VIDEO (ARRAY_SIZE(ov2722_res_video))
 
 static struct ov2722_resolution *ov2722_res = ov2722_res_preview;
-static int N_RES = N_RES_PREVIEW;
+static unsigned long N_RES = N_RES_PREVIEW;
 #endif
diff --git a/drivers/staging/media/atomisp/i2c/ov5693/ov5693.h b/drivers/staging/media/atomisp/i2c/ov5693/ov5693.h
index d88ac1777d86..8c2e6794463b 100644
--- a/drivers/staging/media/atomisp/i2c/ov5693/ov5693.h
+++ b/drivers/staging/media/atomisp/i2c/ov5693/ov5693.h
@@ -1377,5 +1377,5 @@  struct ov5693_resolution ov5693_res_video[] = {
 #define N_RES_VIDEO (ARRAY_SIZE(ov5693_res_video))
 
 static struct ov5693_resolution *ov5693_res = ov5693_res_preview;
-static int N_RES = N_RES_PREVIEW;
+static unsigned long N_RES = N_RES_PREVIEW;
 #endif