Validate extensible ioctls stricter than we do now.
Reviewed-by: Jan Kara jack@suse.cz Signed-off-by: Christian Brauner brauner@kernel.org --- fs/nsfs.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/nsfs.c b/fs/nsfs.c index ce51041bb624..d016d36272d4 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -169,9 +169,11 @@ static bool nsfs_ioctl_valid(unsigned int cmd) /* Extensible ioctls require some extra handling. */ switch (_IOC_NR(cmd)) { case _IOC_NR(NS_MNT_GET_INFO): + return extensible_ioctl_valid(cmd, NS_MNT_GET_INFO, MNT_NS_INFO_SIZE_VER0); case _IOC_NR(NS_MNT_GET_NEXT): + return extensible_ioctl_valid(cmd, NS_MNT_GET_NEXT, MNT_NS_INFO_SIZE_VER0); case _IOC_NR(NS_MNT_GET_PREV): - return (_IOC_TYPE(cmd) == _IOC_TYPE(cmd)); + return extensible_ioctl_valid(cmd, NS_MNT_GET_PREV, MNT_NS_INFO_SIZE_VER0); }
return false;