media: ccs: Clean up parsed CCS static data on parse failure

ccs_data_parse() releases the allocated in-memory data structure when the
parser fails, but it does not clean up parsed metadata that is there to
help access the actual data. Do that, in order to return the data
structure in a sane state.

Fixes: a6b396f410b1 ("media: ccs: Add CCS static data parser library")
Cc: stable@vger.kernel.org
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mehdi Djait <mehdi.djait@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/i2c/ccs/ccs-data.c b/drivers/media/i2c/ccs/ccs-data.c
index 9d42137..2591dba 100644 (file)
--- a/drivers/media/i2c/ccs/ccs-data.c
+++ b/drivers/media/i2c/ccs/ccs-data.c
@@ -10,6 +10,7 @@
 #include <linux/limits.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 
 #include "ccs-data-defs.h"
 
@@ -948,15 +949,15 @@ int ccs_data_parse(struct ccs_data_container *ccsdata, const void *data,
 
        rval = __ccs_data_parse(&bin, ccsdata, data, len, dev, verbose);
        if (rval)
-               return rval;
+               goto out_cleanup;
 
        rval = bin_backing_alloc(&bin);
        if (rval)
-               return rval;
+               goto out_cleanup;
 
        rval = __ccs_data_parse(&bin, ccsdata, data, len, dev, false);
        if (rval)
-               goto out_free;
+               goto out_cleanup;
 
        if (verbose && ccsdata->version)
                print_ccs_data_version(dev, ccsdata->version);
@@ -965,15 +966,16 @@ int ccs_data_parse(struct ccs_data_container *ccsdata, const void *data,
                rval = -EPROTO;
                dev_dbg(dev, "parsing mismatch; base %p; now %p; end %p\n",
                        bin.base, bin.now, bin.end);
-               goto out_free;
+               goto out_cleanup;
        }
 
        ccsdata->backing = bin.base;
 
        return 0;
 
-out_free:
+out_cleanup:
        kvfree(bin.base);
+       memset(ccsdata, 0, sizeof(*ccsdata));
 
        return rval;
 }