[general] Fixed crash in fs.h, when called with fsdrv.create == NULL

When a nor0 devices has no partitions assigned, then a call to
open() to create a file will jump with a NULL fct ptr.

Much more cheching code is missing and pointers to function are
jumped without any NULL ptr check. This must be fixed as well later.

Signed-off-by: Carsten Schlote <c.schlote@konzeptpark.de>

1 files changed, 5 insertions, 2 deletions

diff --git a/fs/fs.c b/fs/fs.c
index 8d39232818..6be2eba396 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -406,8 +406,11 @@ int open(const char *pathname, int flags, ...)
 	}
 
 	if (!exist) {
-		errno = fsdrv->create(dev, path,
-				S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO);
+		if (NULL != fsdrv->create)
+			errno = fsdrv->create(dev, path,
+					S_IFREG | S_IRWXU | S_IRWXG | S_IRWXO);
+		else
+			errno = -EROFS;
 		if (errno)
 			goto out;
 	}