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util: Reallocate larger buffer if getpwuid_r() returns ERANGE

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Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Volker Lendecke <vl@samba.org>

Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Tue Jun  9 21:07:24 UTC 2020 on sn-devel-184
This commit is contained in:
Martin Schwenke 2020-06-05 22:05:42 +10:00 committed by Martin Schwenke
parent 847208cd8a
commit ddac6b2eb4
1 changed files with 13 additions and 0 deletions
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13
lib/util/util_paths.c
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@ -86,6 +86,19 @@ static char *get_user_home_dir(TALLOC_CTX *mem_ctx)
}
rc = getpwuid_r(getuid(), &pwd, buf, len, &pwdbuf);
while (rc == ERANGE) {
size_t newlen = 2 * len;
if (newlen < len) {
/* Overflow */
goto done;
}
len = newlen;
buf = talloc_realloc_size(mem_ctx, buf, len);
if (buf == NULL) {
goto done;
}
rc = getpwuid_r(getuid(), &pwd, buf, len, &pwdbuf);
}
if (rc != 0 || pwdbuf == NULL ) {
const char *szPath = getenv("HOME");
if (szPath == NULL) {