| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 025/125] video: fbdev: pvr2fb: initialize variables | Date | Tue, 3 Nov 2020 21:36:42 +0100 |
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From: Tom Rix <trix@redhat.com>
[ Upstream commit 8e1ba47c60bcd325fdd097cd76054639155e5d2e ]
clang static analysis reports this repesentative error
pvr2fb.c:1049:2: warning: 1st function call argument is an uninitialized value [core.CallAndMessage] if (*cable_arg) ^~~~~~~~~~~~~~~
Problem is that cable_arg depends on the input loop to set the cable_arg[0]. If it does not, then some random value from the stack is used.
A similar problem exists for output_arg.
So initialize cable_arg and output_arg.
Signed-off-by: Tom Rix <trix@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20200720191845.20115-1-trix@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/video/fbdev/pvr2fb.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c index 867c5218968f7..426e79061bc88 100644 --- a/drivers/video/fbdev/pvr2fb.c +++ b/drivers/video/fbdev/pvr2fb.c @@ -1029,6 +1029,8 @@ static int __init pvr2fb_setup(char *options) if (!options || !*options) return 0; + cable_arg[0] = output_arg[0] = 0; + while ((this_opt = strsep(&options, ","))) { if (!*this_opt) continue; -- 2.27.0
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