| Message ID | 20181203100415.53027-1-r.bolshakov@yadro.com |
|---|---|
| State | New |
| Headers | show |
| Series | [for-3.1,1/2] i386: hvf: Fix overrun of _decode_tbl1 | expand |
diff --git a/target/i386/hvf/x86_decode.c b/target/i386/hvf/x86_decode.c index 2e33b69541..d125a6ef83 100644 --- a/target/i386/hvf/x86_decode.c +++ b/target/i386/hvf/x86_decode.c @@ -454,9 +454,9 @@ struct decode_x87_tbl { struct decode_tbl invl_inst = {0x0, 0, 0, false, NULL, NULL, NULL, NULL, decode_invalid}; -struct decode_tbl _decode_tbl1[255]; -struct decode_tbl _decode_tbl2[255]; -struct decode_x87_tbl _decode_tbl3[255]; +struct decode_tbl _decode_tbl1[256]; +struct decode_tbl _decode_tbl2[256]; +struct decode_x87_tbl _decode_tbl3[256]; static void decode_x87_ins(CPUX86State *env, struct x86_decode *decode) {
Single opcode instructions in ff group were incorrectly processed because an overrun of _decode_tbl1[0xff] resulted in access of _decode_tbl2[0x0]. Thus, decode_sldtgroup was called instead of decode_ffgroup: 7d71: decode_sldtgroup: 1 Unimplemented handler (7d71) for 108 (ff 0) While at it correct maximum length for _decode_tbl2 and _decode_tbl3. Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com> --- target/i386/hvf/x86_decode.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)