[PATCH] drivers/mmc/card/block.c: fix potential null dereference'idata'

[Vladimir Motyka]

When allocation of idata fails there was a null dereferece.

Signed-off-by: Vladimir Motyka <vladimir.motyka@xxxxxxxxx>

---
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 407836d..3dec493 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -266,10 +266,10 @@ static struct mmc_blk_ioc_data
*mmc_blk_ioctl_copy_from_user(
 	return idata;

 copy_err:
-	kfree(idata->buf);
+	if(idata)
+		kfree(idata->buf);
 	kfree(idata);
 	return ERR_PTR(err);
-
 }

 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/