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Fix illegal memory access triggered when attempting to assemble a bogus i386 source file.

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PR 24538
	* config/tc-i386-intel.c (i386_intel_simplify_register): Reject
	illegal register numbers.
This commit is contained in:
Nick Clifton 2019-05-14 12:42:02 +01:00
parent 37d0d09177
commit 35015cd193
2 changed files with 12 additions and 0 deletions
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6
gas/ChangeLog
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@ -1,3 +1,9 @@
2019-05-14 Nick Clifton <nickc@redhat.com>
PR 24538
* config/tc-i386-intel.c (i386_intel_simplify_register): Reject
illegal register numbers.
2019-05-10 Nick Clifton <nickc@redhat.com>
PR 24538

6
gas/config/tc-i386-intel.c
View File

@ -270,6 +270,12 @@ i386_intel_simplify_register (expressionS *e)
else
reg_num = e->X_md - 1;
if (reg_num < 0 || reg_num >= (int) i386_regtab_size)
{
as_bad (_("invalid register number"));
return 0;
}
if (!intel_state.in_bracket)
{
if (i.op[this_operand].regs)