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Message-ID: <20140416094034.GA18082@devel> Date: Wed, 16 Apr 2014 18:40:40 +0900 From: Daeseok Youn <daeseok.youn@...il.com> To: plagnioj@...osoft.com Cc: tomi.valkeinen@...com, jg1.han@...sung.com, laurent.pinchart@...asonboard.com, daeseok.youn@...il.com, robdclark@...il.com, linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] fbdev: fix possible NULL pointer derefernce The spec->modedb can be NULL by fb_create_modedb(). And also smatch says: drivers/video/fbdev/core/fbmon.c:975 fb_edid_to_monspecs() error: potential null dereference 'specs->modedb'. (fb_create_modedb returns null) Signed-off-by: Daeseok Youn <daeseok.youn@...il.com> --- drivers/video/fbdev/core/fbmon.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/drivers/video/fbdev/core/fbmon.c b/drivers/video/fbdev/core/fbmon.c index c204ebe..db274ca 100644 --- a/drivers/video/fbdev/core/fbmon.c +++ b/drivers/video/fbdev/core/fbmon.c @@ -966,6 +966,9 @@ void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs) specs->modedb = fb_create_modedb(edid, &specs->modedb_len); + if (!specs->modedb) + return; + /* * Workaround for buggy EDIDs that sets that the first * detailed timing is preferred but has not detailed -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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