author: Tomas Bortoli <tomasbortoli@gmail.com> 2018-07-13 16:58:59 -0700
committer: Linus Torvalds <torvalds@linux-foundation.org> 2018-07-14 11:11:09 -0700
commit: 02f51d45937f7bc7f4dee21e9f85b2d5eac37104
parent: e70cc2bd579e8a9d6d153762f0fe294d0e652ff0
Commit Summary:
Diffstat:
1 file changed, 12 insertions, 9 deletions
diff --git a/fs/autofs/dev-ioctl.c b/fs/autofs/dev-ioctl.c
index ea4ca1445ab7..86eafda4a652 100644
--- a/fs/autofs/dev-ioctl.c
+++ b/fs/autofs/dev-ioctl.c
@@ -135,6 +135,15 @@ static int validate_dev_ioctl(int cmd, struct autofs_dev_ioctl *param)
cmd);
goto out;
}
+ } else {
+ unsigned int inr = _IOC_NR(cmd);
+
+ if (inr == AUTOFS_DEV_IOCTL_OPENMOUNT_CMD ||
+ inr == AUTOFS_DEV_IOCTL_REQUESTER_CMD ||
+ inr == AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD) {
+ err = -EINVAL;
+ goto out;
+ }
}
err = 0;
@@ -271,7 +280,8 @@ static int autofs_dev_ioctl_openmount(struct file *fp,
dev_t devid;
int err, fd;
- /* param->path has already been checked */
+ /* param->path has been checked in validate_dev_ioctl() */
+
if (!param->openmount.devid)
return -EINVAL;
@@ -433,10 +443,7 @@ static int autofs_dev_ioctl_requester(struct file *fp,
dev_t devid;
int err = -ENOENT;
- if (param->size <= AUTOFS_DEV_IOCTL_SIZE) {
- err = -EINVAL;
- goto out;
- }
+ /* param->path has been checked in validate_dev_ioctl() */
devid = sbi->sb->s_dev;
@@ -521,10 +528,7 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp,
unsigned int devid, magic;
int err = -ENOENT;
- if (param->size <= AUTOFS_DEV_IOCTL_SIZE) {
- err = -EINVAL;
- goto out;
- }
+ /* param->path has been checked in validate_dev_ioctl() */
name = param->path;
type = param->ismountpoint.in.type;