UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

UBI: add more checks to chdev open 

When opening UBI volumes by their character device names, make
sure we are opening character devices, not block devices or any
other inode type.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy 2010-01-05 17:25:59 +02:00
parent ff99879328
commit b531b55a7b
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/mtd/ubi/kapi.c
View File

@ -291,8 +291,7 @@ EXPORT_SYMBOL_GPL(ubi_open_volume_nm);
*/
struct ubi_volume_desc *ubi_open_volume_path(const char *pathname, int mode)
{
int error, ubi_num, vol_id;
struct ubi_volume_desc *ret;
int error, ubi_num, vol_id, mod;
struct inode *inode;
struct path path;
@ -306,16 +305,16 @@ struct ubi_volume_desc *ubi_open_volume_path(const char *pathname, int mode)
return ERR_PTR(error);
inode = path.dentry->d_inode;
mod = inode->i_mode;
ubi_num = ubi_major2num(imajor(inode));
vol_id = iminor(inode) - 1;
if (vol_id >= 0 && ubi_num >= 0)
ret = ubi_open_volume(ubi_num, vol_id, mode);
else
ret = ERR_PTR(-ENODEV);
path_put(&path);
return ret;
if (!S_ISCHR(mod))
return ERR_PTR(-EINVAL);
if (vol_id >= 0 && ubi_num >= 0)
return ubi_open_volume(ubi_num, vol_id, mode);
return ERR_PTR(-ENODEV);
}
EXPORT_SYMBOL_GPL(ubi_open_volume_path);