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Subject: media: i2c: ov9650: fix potential integer overflow in
__ov965x_set_frame_interval
Author: Gustavo A. R. Silva <gust...@embeddedor.com>
Date: Mon Jan 29 19:32:01 2018 -0500
Cast fi->interval.numerator to u64 in order to avoid a potential integer
overflow. This variable is being used in a context that expects an
expression of type u64.
Addresses-Coverity-ID: 1324146 ("Unintentional integer overflow")
[Sakari Ailus: use do_div() to make this work on 32-bit systems]
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/media/i2c/ov9650.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/drivers/media/i2c/ov9650.c b/drivers/media/i2c/ov9650.c
index bfd90162a297..5bea31cd41aa 100644
--- a/drivers/media/i2c/ov9650.c
+++ b/drivers/media/i2c/ov9650.c
@@ -1136,8 +1136,8 @@ static int __ov965x_set_frame_interval(struct ov965x
*ov965x,
if (fi->interval.denominator == 0)
return -EINVAL;
- req_int = (u64)(fi->interval.numerator * 10000) /
- fi->interval.denominator;
+ req_int = (u64)fi->interval.numerator * 10000;
+ do_div(req_int, fi->interval.denominator);
for (i = 0; i < ARRAY_SIZE(ov965x_intervals); i++) {
const struct ov965x_interval *iv = &ov965x_intervals[i];
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