Do not leak memory by updating pointer with potentially NULL realloc return value.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov khoroshilov@ispras.ru --- drivers/gpu/drm/drm_edid_load.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index 66d4a28..0303935 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -119,7 +119,7 @@ static int edid_load(struct drm_connector *connector, char *name, { const struct firmware *fw; struct platform_device *pdev; - u8 *fwdata = NULL, *edid; + u8 *fwdata = NULL, *edid, *new_edid; int fwsize, expected; int builtin = 0, err = 0; int i, valid_extensions = 0; @@ -195,12 +195,14 @@ static int edid_load(struct drm_connector *connector, char *name, ""%s" for connector "%s"\n", valid_extensions, edid[0x7e], name, connector_name); edid[0x7e] = valid_extensions; - edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH, + new_edid = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL); - if (edid == NULL) { + if (new_edid == NULL) { err = -ENOMEM; + kfree(edid); goto relfw_out; } + edid = new_edid; }
connector->display_info.raw_edid = edid;