Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=79ee9a...
Commit: 79ee9a8b2d328243488fee8b55bfacc822049a2a
Parent: dbdbb87636e882042cbe53d5d4eac94206f8db83
Author: Steve French <sfrench@us.ibm.com>
AuthorDate: Tue Jun 10 21:37:02 2008 +0000
Committer: Steve French <sfrench@us.ibm.com>
CommitDate: Tue Jun 10 21:37:02 2008 +0000
[CIFS] cifs: fix oops on mount when CONFIG_CIFS_DFS_UPCALL is enabled
simple "mount -t cifs //xxx /mnt" oopsed on strlen of options
http://kerneloops.org/guilty.php?guilty=cifs_get_sb&version=2.6.25-release&start=16711 \
68&end=1703935&class=oops
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
---
fs/cifs/cifsfs.c | 21 ++++++++++-----------
1 files changed, 10 insertions(+), 11 deletions(-)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 5df93fd..86b4d5f 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -97,9 +97,6 @@ cifs_read_super(struct super_block *sb, void *data,
{
struct inode *inode;
struct cifs_sb_info *cifs_sb;
-#ifdef CONFIG_CIFS_DFS_UPCALL
- int len;
-#endif
int rc = 0;
/* BB should we make this contingent on mount parm? */
@@ -117,15 +114,17 @@ cifs_read_super(struct super_block *sb, void *data,
* complex operation (mount), and in case of fail
* just exit instead of doing mount and attempting
* undo it if this copy fails?*/
- len = strlen(data);
- cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
- if (cifs_sb->mountdata == NULL) {
- kfree(sb->s_fs_info);
- sb->s_fs_info = NULL;
- return -ENOMEM;
+ if (data) {
+ int len = strlen(data);
+ cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL);
+ if (cifs_sb->mountdata == NULL) {
+ kfree(sb->s_fs_info);
+ sb->s_fs_info = NULL;
+ return -ENOMEM;
+ }
+ strncpy(cifs_sb->mountdata, data, len + 1);
+ cifs_sb->mountdata[len] = '\0';
}
- strncpy(cifs_sb->mountdata, data, len + 1);
- cifs_sb->mountdata[len] = '\0';
#endif
rc = cifs_mount(sb, cifs_sb, data, devname);
--
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