lkml.org 
[lkml]   [2018]   [Apr]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.9 29/95] HID: core: Fix size as type u32
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Aaron Ma <aaron.ma@canonical.com>

commit 6de0b13cc0b4ba10e98a9263d7a83b940720b77a upstream.

When size is negative, calling memset will make segment fault.
Declare the size as type u32 to keep memset safe.

size in struct hid_report is unsigned, fix return type of
hid_report_len to u32.

Cc: stable@vger.kernel.org
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/hid/hid-core.c | 10 +++++-----
include/linux/hid.h | 6 +++---
2 files changed, 8 insertions(+), 8 deletions(-)

--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1370,7 +1370,7 @@ u8 *hid_alloc_report_buf(struct hid_repo
* of implement() working on 8 byte chunks
*/

- int len = hid_report_len(report) + 7;
+ u32 len = hid_report_len(report) + 7;

return kmalloc(len, flags);
}
@@ -1435,7 +1435,7 @@ void __hid_request(struct hid_device *hi
{
char *buf;
int ret;
- int len;
+ u32 len;

buf = hid_alloc_report_buf(report, GFP_KERNEL);
if (!buf)
@@ -1461,14 +1461,14 @@ out:
}
EXPORT_SYMBOL_GPL(__hid_request);

-int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
+int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
int interrupt)
{
struct hid_report_enum *report_enum = hid->report_enum + type;
struct hid_report *report;
struct hid_driver *hdrv;
unsigned int a;
- int rsize, csize = size;
+ u32 rsize, csize = size;
u8 *cdata = data;
int ret = 0;

@@ -1526,7 +1526,7 @@ EXPORT_SYMBOL_GPL(hid_report_raw_event);
*
* This is data entry for lower layers.
*/
-int hid_input_report(struct hid_device *hid, int type, u8 *data, int size, int interrupt)
+int hid_input_report(struct hid_device *hid, int type, u8 *data, u32 size, int interrupt)
{
struct hid_report_enum *report_enum;
struct hid_driver *hdrv;
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -801,7 +801,7 @@ extern int hidinput_connect(struct hid_d
extern void hidinput_disconnect(struct hid_device *);

int hid_set_field(struct hid_field *, unsigned, __s32);
-int hid_input_report(struct hid_device *, int type, u8 *, int, int);
+int hid_input_report(struct hid_device *, int type, u8 *, u32, int);
int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
struct hid_field *hidinput_get_led_field(struct hid_device *hid);
unsigned int hidinput_count_leds(struct hid_device *hid);
@@ -1106,13 +1106,13 @@ static inline void hid_hw_wait(struct hi
*
* @report: the report we want to know the length
*/
-static inline int hid_report_len(struct hid_report *report)
+static inline u32 hid_report_len(struct hid_report *report)
{
/* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
return ((report->size - 1) >> 3) + 1 + (report->id > 0);
}

-int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
+int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
int interrupt);

/* HID quirks API */

\
 
 \ /
  Last update: 2018-04-22 16:57    [W:0.531 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site