From 9e29523b9537983b4c4b205ff868d0b3bca0383b Mon Sep 17 00:00:00 2001 From: Eric Laurent Date: Fri, 8 Jan 2016 10:52:38 -0800 Subject: fix possible overflow in effect wrappers. Add checks on parameter size field in effect command handlers to avoid overflow leading to invalid comparison with min allowed size for command and reply buffers. Bug: 26347509. Change-Id: I20e6a9b6de8e5172b957caa1ac9410b9752efa4d (cherry picked from commit ad1bd92a49d78df6bc6e75bee68c517c1326f3cf) --- media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp | 5 ++++- media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp | 5 ++++- 2 files changed, 8 insertions(+), 2 deletions(-) (limited to 'media') diff --git a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp index 9fcfba3..5befff8 100644 --- a/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp +++ b/media/libeffects/lvm/wrapper/Bundle/EffectBundle.cpp @@ -2809,7 +2809,10 @@ int Effect_command(effect_handle_t self, //ALOGV("\tEffect_command cmdCode Case: EFFECT_CMD_GET_PARAM start"); effect_param_t *p = (effect_param_t *)pCmdData; - + if (SIZE_MAX - sizeof(effect_param_t) < (size_t)p->psize) { + android_errorWriteLog(0x534e4554, "26347509"); + return -EINVAL; + } if (pCmdData == NULL || cmdSize < sizeof(effect_param_t) || cmdSize < (sizeof(effect_param_t) + p->psize) || pReplyData == NULL || replySize == NULL || diff --git a/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp b/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp index 2e22532..7ab16a1 100644 --- a/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp +++ b/media/libeffects/lvm/wrapper/Reverb/EffectReverb.cpp @@ -1953,7 +1953,10 @@ int Reverb_command(effect_handle_t self, //ALOGV("\tReverb_command cmdCode Case: " // "EFFECT_CMD_GET_PARAM start"); effect_param_t *p = (effect_param_t *)pCmdData; - + if (SIZE_MAX - sizeof(effect_param_t) < (size_t)p->psize) { + android_errorWriteLog(0x534e4554, "26347509"); + return -EINVAL; + } if (pCmdData == NULL || cmdSize < sizeof(effect_param_t) || cmdSize < (sizeof(effect_param_t) + p->psize) || pReplyData == NULL || replySize == NULL || -- cgit v1.1