android heap corruption_native heap allocted_policecorruptio

TCL

ItisworkinganditcandecipherfileswithoutproblemsbutIgetrandomHeapMemoryCorruptionswhenIworkwithlargestreams。

Fromabovelineitlookstomethatyourprogramisclearlyoverwritingthememorywhichwasallocatedimplicitlyorexplicitlybyyourcode。

IwastryingtounderstandyourcodehoweveritwasnoTCLeartome。ButItriedtolookfrommemorycorruptionscenarioandfoundthatyourprogrAMDoeshavemalloc/freecallwhichmightleadtomemoryoverrun。

AMD

EVP_CIPHER_CTX*ctx=(EVP_CIPHER_CTX*)malloc(sizeof(EVP_CIPHER_CTX));EVP_CIPHER_CTX_init(ctx);EVP_CIPHER_CTX*ctx=(EVP_CIPHER_CTX*)malloc(sizeof(EVP_CIPHER_CTX));EVP_CIPHER_CTX_init(ctx);ItriedtocheckthelayoutoftheEVP_CIPHER_CTXstructurebutitwasnotavAIlableinyourcode。

ButIsawthatthesepointersaregettingusedinvariouscontextwithinyourprogram。NowyoushouldcheckthatunderwhichscenarioyourbuffercanbeoverwrittenassomeplacesyouhaveuseddifferentkeyLengthanddependingonthisyourprogramisexecutingdifferentfunction。

Ithinkyoumaywanttoreviewthesecodesandseewhetheroverflowispossible!AsyourapplicationwouldberunningonAndroidbasedsystemwherewecannotrunanydynamictool(VaLGrind/WinDBG/Pageheap。

)soIguessyouneedtoreviewyourcodebyputtingsomelogatimportantplaceandseewhereyouareoverwriting。Hopeaboveinformationwouldbeusefulforyoutounderstandyourproblem。