From 6de0b13cc0b4ba10e98a9263d7a83b940720b77a Mon Sep 17 00:00:00 2001 From: Aaron Ma Date: Mon, 8 Jan 2018 10:41:41 +0800 Subject: [PATCH] HID: core: Fix size as type u32 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 Signed-off-by: Jiri Kosina --- drivers/hid/hid-core.c | 10 +++++----- include/linux/hid.h | 6 +++--- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index c2560aae5542..4fc08c38bc0e 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1365,7 +1365,7 @@ u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags) * 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); } @@ -1430,7 +1430,7 @@ void __hid_request(struct hid_device *hid, struct hid_report *report, { char *buf; int ret; - int len; + u32 len; buf = hid_alloc_report_buf(report, GFP_KERNEL); if (!buf) @@ -1456,14 +1456,14 @@ 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; @@ -1521,7 +1521,7 @@ 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; diff --git a/include/linux/hid.h b/include/linux/hid.h index 091a81cf330f..0efe80b59156 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -851,7 +851,7 @@ extern int hidinput_connect(struct hid_device *hid, unsigned int force); 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); @@ -1102,13 +1102,13 @@ static inline void hid_hw_wait(struct hid_device *hdev) * * @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 */ -- 2.30.2