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Fix PR 19089: Environment variable TMP may yield gcc: abort

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Even though I cannot reproduce the ICE any more, this is still
a bug. We check already to see if we can access the directory
but never check to see if the path is actually a directory.

This adds the check and now we reject the file as not usable
as a tmp directory.

OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

libiberty/ChangeLog:

	* make-temp-file.c (try_dir): Check to see if the dir
	is actually a directory.
This commit is contained in:
Andrew Pinski 2021-11-27 18:16:50 -08:00
parent 2f0dd172bc
commit 68332ab7ec
1 changed files with 15 additions and 1 deletions
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16
libiberty/make-temp-file.c
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@ -39,6 +39,10 @@ Boston, MA 02110-1301, USA. */
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <windows.h>
#endif
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifndef R_OK
#define R_OK 4
@ -76,7 +80,17 @@ try_dir (const char *dir, const char *base)
return base;
if (dir != 0
&& access (dir, R_OK | W_OK | X_OK) == 0)
return dir;
{
/* Check to make sure dir is actually a directory. */
#ifdef S_ISDIR
struct stat s;
if (stat (dir, &s))
return NULL;
if (!S_ISDIR (s.st_mode))
return NULL;
#endif
return dir;
}
return 0;
}