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Fix potential array overrun in x86 assembler. 

* config/tc-i386.c (parse_operands): Check for operand overflow
	before setting the unspecified bit.
This commit is contained in:
Nick Clifton 2017-01-20 10:32:25 +00:00
parent a24df30571
commit 9d46ce346f
2 changed files with 6 additions and 1 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
2017-01-20 Nick Clifton <nickc@redhat.com>
* config/tc-i386.c (parse_operands): Check for operand overflow
before setting the unspecified bit.
2017-01-18 Maciej W. Rozycki <macro@imgtec.com>
PR gas/20649

2
gas/config/tc-i386.c
View File

@ -4136,13 +4136,13 @@ parse_operands (char *l, const char *mnemonic)
{ /* Yes, we've read in another operand. */
unsigned int operand_ok;
this_operand = i.operands++;
i.types[this_operand].bitfield.unspecified = 1;
if (i.operands > MAX_OPERANDS)
{
as_bad (_("spurious operands; (%d operands/instruction max)"),
MAX_OPERANDS);
return NULL;
}
i.types[this_operand].bitfield.unspecified = 1;
/* Now parse operand adding info to 'i' as we go along. */
END_STRING_AND_SAVE (l);