lkml.org 
[lkml]   [2018]   [Jan]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 3/8] i2c: max2175: fix potential integer overflow in max2175_set_nco_freq
Cast expression (clock_rate - abs_nco_freq) to s64 in order to avoid
a potential integer overflow. This variable is being used in a
context that expects an expression of type s64.

Addresses-Coverity-ID: 1446589 ("Unintentional integer overflow")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
drivers/media/i2c/max2175.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/max2175.c b/drivers/media/i2c/max2175.c
index 2f1966b..3401ae6 100644
--- a/drivers/media/i2c/max2175.c
+++ b/drivers/media/i2c/max2175.c
@@ -643,7 +643,7 @@ static int max2175_set_nco_freq(struct max2175 *ctx, s32 nco_freq)
if (abs_nco_freq < clock_rate / 2) {
nco_val_desired = 2 * nco_freq;
} else {
- nco_val_desired = 2 * (clock_rate - abs_nco_freq);
+ nco_val_desired = 2 * (s64)(clock_rate - abs_nco_freq);
if (nco_freq < 0)
nco_val_desired = -nco_val_desired;
}
--
2.7.4
\
 
 \ /
  Last update: 2018-01-30 01:32    [W:0.112 / U:5.876 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site