57d292bd7e
Fix bogus copying of data into userspace when HIDIOCGRDESC is issued. HID-transport layer makes sure that dev->hid->rdesc is not larger than HID_MAX_DESCRIPTOR_SIZE. Noticed-by: Al Viro <viro@ftp.linux.org.uk> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
86 lines
2 KiB
C
86 lines
2 KiB
C
#ifndef _HIDRAW_H
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#define _HIDRAW_H
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/*
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* Copyright (c) 2007 Jiri Kosina
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/hid.h>
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struct hidraw_report_descriptor {
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__u32 size;
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__u8 value[HID_MAX_DESCRIPTOR_SIZE];
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};
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struct hidraw_devinfo {
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__u32 bustype;
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__s16 vendor;
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__s16 product;
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};
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/* ioctl interface */
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#define HIDIOCGRDESCSIZE _IOR('H', 0x01, int)
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#define HIDIOCGRDESC _IOR('H', 0x02, struct hidraw_report_descriptor)
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#define HIDIOCGRAWINFO _IOR('H', 0x03, struct hidraw_devinfo)
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#define HIDRAW_FIRST_MINOR 0
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#define HIDRAW_MAX_DEVICES 64
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/* number of reports to buffer */
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#define HIDRAW_BUFFER_SIZE 64
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/* kernel-only API declarations */
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#ifdef __KERNEL__
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struct hidraw {
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unsigned int minor;
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int exist;
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int open;
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wait_queue_head_t wait;
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struct hid_device *hid;
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struct device *dev;
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struct list_head list;
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};
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struct hidraw_report {
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__u8 *value;
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int len;
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};
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struct hidraw_list {
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struct hidraw_report buffer[HIDRAW_BUFFER_SIZE];
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int head;
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int tail;
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struct fasync_struct *fasync;
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struct hidraw *hidraw;
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struct list_head node;
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struct mutex read_mutex;
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};
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#ifdef CONFIG_HIDRAW
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int hidraw_init(void);
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void hidraw_exit(void);
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void hidraw_report_event(struct hid_device *, u8 *, int);
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int hidraw_connect(struct hid_device *);
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void hidraw_disconnect(struct hid_device *);
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#else
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static inline int hidraw_init(void) { return 0; }
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static inline void hidraw_exit(void) { }
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static inline void hidraw_report_event(struct hid_device *hid, u8 *data, int len) { }
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static inline int hidraw_connect(struct hid_device *hid) { return -1; }
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static inline void hidraw_disconnect(struct hid_device *hid) { }
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#endif
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#endif
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#endif
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