From 7fcec4c14b15684b0853c9ebc4090c19adc9a1f6 Mon Sep 17 00:00:00 2001 From: Andrey Utkin Date: Thu, 17 Jul 2014 13:27:16 -0300 Subject: [PATCH] [media] staging/media/davinci_vpfe/dm365_ipipeif.c: fix negativity check [linux-3.16-rc5/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c:210]: (style) Checking if unsigned variable 'val' is less than zero. val = get_oneshot_mode(ipipeif->input); if (val < 0) { pr_err("ipipeif: links setup required"); return -EINVAL; } but static int get_oneshot_mode(enum ipipeif_input_entity input) Introduced temporary variable for negativity check. "val" is afterwards used in a lot of bitwise operations, so changing its type to signed is not safe, according to CERT C Secure Coding Standards chapter INT13-C: "Use bitwise operators only on unsigned operands" https://www.securecoding.cert.org/confluence/display/seccode/INT13-C.+Use+bitwise+operators+only+on+unsigned+operands Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80521 Reported-by: David Binderman Signed-off-by: Andrey Utkin Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/staging/media/davinci_vpfe/dm365_ipipeif.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c b/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c index 59540cd..6d4893b 100644 --- a/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c +++ b/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c @@ -196,6 +196,7 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd) int data_shift; int pack_mode; int source1; + int tmp; ipipeif_base_addr = ipipeif->ipipeif_base_addr; @@ -206,8 +207,8 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd) outformat = &ipipeif->formats[IPIPEIF_PAD_SOURCE]; /* Combine all the fields to make CFG1 register of IPIPEIF */ - val = get_oneshot_mode(ipipeif->input); - if (val < 0) { + tmp = val = get_oneshot_mode(ipipeif->input); + if (tmp < 0) { pr_err("ipipeif: links setup required"); return -EINVAL; } -- 2.7.4