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Fix negative index in anal.arm64.cs ##crash

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* Reported by Cen Zhang via huntr.dev
This commit is contained in:
Sergi Àlvarez i Capilla 2022-02-07 21:52:26 +01:00 committed by pancake
parent 8525ad0b9f
commit d17a7bdf16
1 changed files with 1 additions and 2 deletions
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3
libr/anal/p/anal_arm_cs.c
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@ -1015,7 +1015,7 @@ static const char *arg(RAnal *a, csh *handle, cs_insn *insn, char *buf, int n) {
#define VEC64(n) insn->detail->arm64.operands[n].vess
#define VEC64_APPEND(sb, n, i) vector64_append(sb, handle, insn, n, i)
#define VEC64_MASK(sh, sz) (bitmask_by_width[63]^(bitmask_by_width[sz-1]<<sh))
#define VEC64_MASK(sh, sz) (bitmask_by_width[63]^(bitmask_by_width[sz>0?sz-1:0]<<sh))
static void vector64_append(RStrBuf *sb, csh *handle, cs_insn *insn, int n, int i) {
cs_arm64_op op = INSOP64 (n);
@ -1079,7 +1079,6 @@ static void vector64_dst_append(RStrBuf *sb, csh *handle, cs_insn *insn, int n,
shift -= 64;
regc = "h";
}
if (shift > 0 && shift < 64) {
r_strbuf_appendf (sb, "%d,SWAP,0x%"PFMT64x",&,<<,%s%s,0x%"PFMT64x",&,|,%s%s",
shift, mask, REG64 (n), regc, VEC64_MASK (shift, size), REG64 (n), regc);