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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2017-05-02 13:47:53 +0200
committerBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2017-05-02 13:47:53 +0200
commitdc85e9a87420613b3129d5cc5ecd79c58351c546 (patch)
tree74ef6a2b546bb5fd315c260c2b41764daebbfaa1 /drivers/video/fbdev
parent45f580c42e5c125d55dbd8099750a1998de3d917 (diff)
downloadlinux-dc85e9a87420613b3129d5cc5ecd79c58351c546.tar.bz2
sm501fb: don't return zero on failure path in sm501fb_start()
If fbmem iomemory mapping failed, sm501fb_start() breaks off initialization, deallocates resources, but returns zero. As a result, double deallocation can happen in sm501fb_stop(). Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'drivers/video/fbdev')
-rw-r--r--drivers/video/fbdev/sm501fb.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c
index d80bc8a3200f..67e314fdd947 100644
--- a/drivers/video/fbdev/sm501fb.c
+++ b/drivers/video/fbdev/sm501fb.c
@@ -1600,6 +1600,7 @@ static int sm501fb_start(struct sm501fb_info *info,
info->fbmem = ioremap(res->start, resource_size(res));
if (info->fbmem == NULL) {
dev_err(dev, "cannot remap framebuffer\n");
+ ret = -ENXIO;
goto err_mem_res;
}