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ppc: fix registers overflow (#1687) 

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22236
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StalkR 2021-03-19 23:35:11 +00:00 committed by GitHub
parent c59d62f735
commit 71f5c64c43
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 13 deletions
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28
arch/PowerPC/PPCDisassembler.c
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@ -164,9 +164,11 @@ static uint64_t getFeatureBits(int feature)
}
static DecodeStatus decodeRegisterClass(MCInst *Inst, uint64_t RegNo,
const unsigned *Regs)
const unsigned *Regs, size_t RegsLen)
{
// assert(RegNo < N && "Invalid register number");
if (RegNo >= RegsLen / sizeof(unsigned)) {
return MCDisassembler_Fail;
}
MCOperand_CreateReg0(Inst, Regs[RegNo]);
return MCDisassembler_Success;
}
@ -175,70 +177,70 @@ static DecodeStatus DecodeCRRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, CRRegs);
return decodeRegisterClass(Inst, RegNo, CRRegs, sizeof(CRRegs));
}
static DecodeStatus DecodeCRBITRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, CRBITRegs);
return decodeRegisterClass(Inst, RegNo, CRBITRegs, sizeof(CRBITRegs));
}
static DecodeStatus DecodeF4RCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, FRegs);
return decodeRegisterClass(Inst, RegNo, FRegs, sizeof(FRegs));
}
static DecodeStatus DecodeF8RCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, FRegs);
return decodeRegisterClass(Inst, RegNo, FRegs, sizeof(FRegs));
}
static DecodeStatus DecodeVRRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, VRegs);
return decodeRegisterClass(Inst, RegNo, VRegs, sizeof(VRegs));
}
static DecodeStatus DecodeVSRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, VSRegs);
return decodeRegisterClass(Inst, RegNo, VSRegs, sizeof(VSRegs));
}
static DecodeStatus DecodeVSFRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, VSFRegs);
return decodeRegisterClass(Inst, RegNo, VSFRegs, sizeof(VSFRegs));
}
static DecodeStatus DecodeGPRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, GPRegs);
return decodeRegisterClass(Inst, RegNo, GPRegs, sizeof(GPRegs));
}
static DecodeStatus DecodeGPRC_NOR0RegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, GP0Regs);
return decodeRegisterClass(Inst, RegNo, GP0Regs, sizeof(GP0Regs));
}
static DecodeStatus DecodeG8RCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, G8Regs);
return decodeRegisterClass(Inst, RegNo, G8Regs, sizeof(G8Regs));
}
#define DecodePointerLikeRegClass0 DecodeGPRCRegisterClass
@ -248,7 +250,7 @@ static DecodeStatus DecodeQFRCRegisterClass(MCInst *Inst, uint64_t RegNo,
uint64_t Address,
const void *Decoder)
{
return decodeRegisterClass(Inst, RegNo, QFRegs);
return decodeRegisterClass(Inst, RegNo, QFRegs, sizeof(QFRegs));
}
#define DecodeQSRCRegisterClass DecodeQFRCRegisterClass