svn commit: r345419 - projects/fuse2/sys/fs/fuse

[Alan Somers]

Author: asomers
Date: Fri Mar 22 17:53:13 2019
New Revision: 345419
URL: https://svnweb.freebsd.org/changeset/base/345419

Log:
  fusefs: fix a panic on mount
  
  Don't page fault if the file descriptor provided with "-o fd" is invalid.
  
  Sponsored by:	The FreeBSD Foundation

Modified:
  projects/fuse2/sys/fs/fuse/fuse_vfsops.c

Modified: projects/fuse2/sys/fs/fuse/fuse_vfsops.c
==============================================================================
--- projects/fuse2/sys/fs/fuse/fuse_vfsops.c	Fri Mar 22 17:44:47 2019	(r345418)
+++ projects/fuse2/sys/fs/fuse/fuse_vfsops.c	Fri Mar 22 17:53:13 2019	(r345419)
@@ -225,7 +225,7 @@ fuse_vfsop_mount(struct mount *mp)
 	size_t len;
 
 	struct cdev *fdev;
-	struct fuse_data *data;
+	struct fuse_data *data = NULL;
 	struct thread *td;
 	struct file *fp, *fptmp;
 	char *fspec, *subtype;
@@ -361,7 +361,7 @@ fuse_vfsop_mount(struct mount *mp)
 out:
 	if (err) {
 		FUSE_LOCK();
-		if (data->mp == mp) {
+		if (data && data->mp == mp) {
 			/*
 			 * Destroy device only if we acquired reference to
 			 * it