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Fix invalid memory access in gcc.c (driver/72765)

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PR driver/72765
	* gcc.c (do_spec_1): Call save_string with the right size.
	(save_string): Do an assert about string we copy.

From-SVN: r239475
This commit is contained in:
Martin Liska 2016-08-15 13:16:50 +02:00 committed by Martin Liska
parent 397d8acd71
commit 3835914115
2 changed files with 10 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-08-15 Martin Liska <mliska@suse.cz>
PR driver/72765
* gcc.c (do_spec_1): Call save_string with the right size.
(save_string): Do an assert about string we copy.
2016-08-15 Richard Biener <rguenther@suse.de>
* ree.c (rest_of_handle_ree): Remove redundant timevar push/pop.

6
gcc/gcc.c
View File

@ -5420,8 +5420,9 @@ do_spec_1 (const char *spec, int inswitch, const char *soft_matched_part)
if (files_differ)
#endif
{
temp_filename = save_string (temp_filename,
temp_filename_length + 1);
temp_filename
= save_string (temp_filename,
temp_filename_length - 1);
obstack_grow (&obstack, temp_filename,
temp_filename_length);
arg_going = 1;
@ -8362,6 +8363,7 @@ save_string (const char *s, int len)
{
char *result = XNEWVEC (char, len + 1);
gcc_checking_assert (strlen (s) >= (unsigned int) len);
memcpy (result, s, len);
result[len] = 0;
return result;