90 lines
3.0 KiB
Diff
90 lines
3.0 KiB
Diff
for gdb/ChangeLog:
|
|
2006-08-22 Will Drewry <wad@google.com>
|
|
Tavis Ormandy <taviso@google.com>
|
|
|
|
* dwarf2read.c (decode_locdesc): Enforce location description stack
|
|
boundaries.
|
|
* dwarfread.c (locval): Likewise.
|
|
|
|
Index: gdb-6.5/gdb/dwarf2read.c
|
|
===================================================================
|
|
--- gdb-6.5.orig/gdb/dwarf2read.c 2006-09-04 02:02:23.000000000 -0300
|
|
+++ gdb-6.5/gdb/dwarf2read.c 2006-09-04 02:02:23.000000000 -0300
|
|
@@ -8667,8 +8667,7 @@ dwarf2_fundamental_type (struct objfile
|
|
callers will only want a very basic result and this can become a
|
|
complaint.
|
|
|
|
- Note that stack[0] is unused except as a default error return.
|
|
- Note that stack overflow is not yet handled. */
|
|
+ Note that stack[0] is unused except as a default error return. */
|
|
|
|
static CORE_ADDR
|
|
decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu)
|
|
@@ -8685,7 +8684,7 @@ decode_locdesc (struct dwarf_block *blk,
|
|
|
|
i = 0;
|
|
stacki = 0;
|
|
- stack[stacki] = 0;
|
|
+ stack[++stacki] = 0;
|
|
|
|
while (i < size)
|
|
{
|
|
@@ -8864,6 +8863,16 @@ decode_locdesc (struct dwarf_block *blk,
|
|
dwarf_stack_op_name (op));
|
|
return (stack[stacki]);
|
|
}
|
|
+ /* Enforce maximum stack depth of size-1 to avoid ++stacki writing
|
|
+ outside of the allocated space. Also enforce minimum > 0.
|
|
+ -- wad@google.com 14 Aug 2006 */
|
|
+ if (stacki >= sizeof (stack) / sizeof (*stack) - 1)
|
|
+ internal_error (__FILE__, __LINE__,
|
|
+ _("location description stack too deep: %d"),
|
|
+ stacki);
|
|
+ if (stacki <= 0)
|
|
+ internal_error (__FILE__, __LINE__,
|
|
+ _("location description stack too shallow"));
|
|
}
|
|
return (stack[stacki]);
|
|
}
|
|
Index: gdb-6.5/gdb/dwarfread.c
|
|
===================================================================
|
|
--- gdb-6.5.orig/gdb/dwarfread.c 2005-12-17 20:33:59.000000000 -0200
|
|
+++ gdb-6.5/gdb/dwarfread.c 2006-09-04 02:02:23.000000000 -0300
|
|
@@ -2138,9 +2138,7 @@ decode_line_numbers (char *linetable)
|
|
|
|
NOTES
|
|
|
|
- Note that stack[0] is unused except as a default error return.
|
|
- Note that stack overflow is not yet handled.
|
|
- */
|
|
+ Note that stack[0] is unused except as a default error return. */
|
|
|
|
static int
|
|
locval (struct dieinfo *dip)
|
|
@@ -2160,7 +2158,7 @@ locval (struct dieinfo *dip)
|
|
loc += nbytes;
|
|
end = loc + locsize;
|
|
stacki = 0;
|
|
- stack[stacki] = 0;
|
|
+ stack[++stacki] = 0;
|
|
dip->isreg = 0;
|
|
dip->offreg = 0;
|
|
dip->optimized_out = 1;
|
|
@@ -2224,6 +2222,16 @@ locval (struct dieinfo *dip)
|
|
stacki--;
|
|
break;
|
|
}
|
|
+ /* Enforce maximum stack depth of size-1 to avoid ++stacki writing
|
|
+ outside of the allocated space. Also enforce minimum > 0.
|
|
+ -- wad@google.com 14 Aug 2006 */
|
|
+ if (stacki >= sizeof (stack) / sizeof (*stack) - 1)
|
|
+ internal_error (__FILE__, __LINE__,
|
|
+ _("location description stack too deep: %d"),
|
|
+ stacki);
|
|
+ if (stacki <= 0)
|
|
+ internal_error (__FILE__, __LINE__,
|
|
+ _("location description stack too shallow"));
|
|
}
|
|
return (stack[stacki]);
|
|
}
|