mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-09-06 01:22:20 +00:00
64 lines
2.2 KiB
Diff
64 lines
2.2 KiB
Diff
From eb7b1426279e751b1fc3e86f434dc349945c1ae7 Mon Sep 17 00:00:00 2001
|
|
From: ahmedsh <ahmedsh@codeaurora.org>
|
|
Date: Wed, 4 Jan 2017 16:00:27 -0500
|
|
Subject: seemp: use local stack mem when encoding params
|
|
|
|
Avoid race condition in driver when encoding param by
|
|
reading contents from a local copy instead of msg buffer
|
|
itself which can be mapped to user space.
|
|
|
|
Change-Id: I9f111c078baefca6e6f1fcda30af1044891a3356
|
|
Signed-off-by: Ahmed Sheikh <ahmedsh@codeaurora.org>
|
|
---
|
|
.../platform/msm/seemp_core/seemp_event_encoder.c | 21 ++++++++++++++++-----
|
|
1 file changed, 16 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/drivers/platform/msm/seemp_core/seemp_event_encoder.c b/drivers/platform/msm/seemp_core/seemp_event_encoder.c
|
|
index df56a84..36901f5 100644
|
|
--- a/drivers/platform/msm/seemp_core/seemp_event_encoder.c
|
|
+++ b/drivers/platform/msm/seemp_core/seemp_event_encoder.c
|
|
@@ -1,5 +1,5 @@
|
|
/*
|
|
- * Copyright (c) 2015, The Linux Foundation. All rights reserved.
|
|
+ * Copyright (c) 2015, 2017, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
@@ -48,9 +48,15 @@ static void check_param_range(char *section_eq, bool param,
|
|
|
|
void encode_seemp_params(struct seemp_logk_blk *blk)
|
|
{
|
|
- char *s = blk->payload.msg + 1;
|
|
+ struct seemp_logk_blk tmp;
|
|
+ char *s = 0;
|
|
+ char *msg_section_start = 0;
|
|
+ char *msg_section_eq = 0;
|
|
+ char *msg_s = 0;
|
|
|
|
- blk->payload.msg[BLK_MAX_MSG_SZ - 1] = 0; /* zero-terminate */
|
|
+ memcpy(tmp.payload.msg, blk->payload.msg, BLK_MAX_MSG_SZ);
|
|
+ s = tmp.payload.msg + 1;
|
|
+ tmp.payload.msg[BLK_MAX_MSG_SZ - 1] = 0; /* zero-terminate */
|
|
|
|
while (true) {
|
|
char *section_start = s;
|
|
@@ -105,8 +111,13 @@ void encode_seemp_params(struct seemp_logk_blk *blk)
|
|
}
|
|
}
|
|
|
|
- encode_seemp_section(section_start, section_eq, s, param,
|
|
- numeric, id, numeric_value);
|
|
+ msg_section_start = blk->payload.msg + (section_start -
|
|
+ tmp.payload.msg);
|
|
+ msg_section_eq = blk->payload.msg + (section_eq -
|
|
+ tmp.payload.msg);
|
|
+ msg_s = blk->payload.msg + (s - tmp.payload.msg);
|
|
+ encode_seemp_section(msg_section_start, msg_section_eq,
|
|
+ msg_s, param, numeric, id, numeric_value);
|
|
|
|
if (*s == 0)
|
|
break;
|
|
--
|
|
cgit v1.1
|
|
|