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re PR bootstrap/12490 (buffer overflow in scan-decls.c)

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PR bootstrap/12490
	* scan-decls.c (MAX_EXTERN_C_BRACES): New preprocessor constant
	to define the size of the extern_C_braces array.  Set it to 200.
	(scan_decls): Abort when extern_C_braces_length is out-of-bounds.

Co-Authored-By: Eric Botcazou <ebotcazou@libertysurf.fr>

From-SVN: r72224
This commit is contained in:
Timo Kokkonen 2003-10-08 15:29:27 +03:00 committed by Eric Botcazou
parent e6e2802fa7
commit 10dbf39316
2 changed files with 17 additions and 1 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2003-10-08 Timo Kokkonen <tjko@iki.fi>
Eric Botcazou <ebotcazou@libertysurf.fr>
PR bootstrap/12490
* scan-decls.c (MAX_EXTERN_C_BRACES): New preprocessor constant
to define the size of the extern_C_braces array. Set it to 200.
(scan_decls): Abort when extern_C_braces_length is out-of-bounds.
2003-10-08 Carlo Wood <carlo@alinoe.com>
* Makefile.in (gengtype-lex.c): flex 2.5.4[a] doesn't understand

10
gcc/scan-decls.c
View File

@ -34,7 +34,9 @@ int brace_nesting = 0;
indicate the (brace nesting levels of) left braces that were
prefixed by extern "C". */
int extern_C_braces_length = 0;
char extern_C_braces[20];
/* 20 is not enough anymore on Solaris 9. */
#define MAX_EXTERN_C_BRACES 200
char extern_C_braces[MAX_EXTERN_C_BRACES];
#define in_extern_C_brace (extern_C_braces_length>0)
/* True if the function declaration currently being scanned is
@ -220,6 +222,12 @@ scan_decls (cpp_reader *pfile, int argc ATTRIBUTE_UNUSED,
brace_nesting++;
extern_C_braces[extern_C_braces_length++]
= brace_nesting;
if (extern_C_braces_length >= MAX_EXTERN_C_BRACES)
{
fprintf (stderr,
"Internal error: out-of-bounds index\n");
exit (FATAL_EXIT_CODE);
}
goto new_statement;
}
}