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x86: fix a race condition made by a static variable initialization. bug reported by Xiaozhu Meng

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This commit is contained in:
naq 2019-06-19 10:44:13 +08:00
parent c602427ca3
commit 30bffad2d4
1 changed files with 2 additions and 5 deletions
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7
arch/X86/X86DisassemblerDecoder.c
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@ -159,11 +159,8 @@ static InstrUID decode(OpcodeType type,
uint8_t modRM)
{
const struct ModRMDecision *dec = NULL;
static unsigned int index = -1;
static struct OpcodeDecision emptyDecision;
if (index == -1)
memset((void *)&emptyDecision, 0, sizeof(emptyDecision));
unsigned int index;
static struct OpcodeDecision emptyDecision = { 0 };
switch (type) {
default: break; // never reach