ppc: handle invalid CR bits with more than 8 zeros in decodeCRBitMOperand(). bug reported by @felixgr

2015-06-16 13:59:10 +08:00 · 2015-06-16 13:59:10 +08:00 · d49ec461ab
parent 3dcad960f6
commit d49ec461ab
1 changed files with 2 additions and 0 deletions
--- a/arch/PowerPC/PPCDisassembler.c
+++ b/arch/PowerPC/PPCDisassembler.c
@ -316,6 +316,8 @@ static DecodeStatus decodeCRBitMOperand(MCInst *Inst, uint64_t Imm,

 	unsigned Zeros = CountTrailingZeros_64(Imm);
 	// assert(Zeros < 8 && "Invalid CR bit value");
+	if (Zeros >=8)
+		return MCDisassembler_Fail;

 	MCOperand_CreateReg0(Inst, CRRegs[7 - Zeros]);
 	return MCDisassembler_Success;