On 21/06/14 11:01 PM, Jérémie Courrèges-Anglas wrote:
(Redirecting this to ports@)
Could you folks test this patch against dovecot from -stable? I only
did compile testing on -current. I don't know how the allocator(s)
handle failures nor how would i_realloc handle pwbuf_size ==
old_pwbuf_size, but this looks safe.
I forgot about this. I had put this in just after the new allocation
style was added to Dovecot as a workaround until the libc functions
were fixed. This would be Ok for 5.5.
$OpenBSD$
Hack: we avoid the actual ERANGE error case by always providing a large
enough buffer.
--- src/lib/ipwd.c.orig Tue Nov 19 21:36:30 2013
+++ src/lib/ipwd.c Sun Jun 22 04:31:43 2014
@@ -15,24 +15,26 @@ static size_t pwbuf_size, grbuf_size;
static void pw_init(void)
{
size_t old_pwbuf_size = pwbuf_size;
+ size_t new_pwbuf_size;
- if (pwbuf == NULL || errno == ERANGE) {
- pwbuf_size = nearest_power(old_pwbuf_size + 1);
- if (pwbuf_size < PWBUF_MIN_SIZE)
- pwbuf_size = PWBUF_MIN_SIZE;
- pwbuf = i_realloc(pwbuf, old_pwbuf_size, pwbuf_size);
+ if (pwbuf == NULL) {
+ new_pwbuf_size = sysconf(_SC_GETPW_R_SIZE_MAX);
+ pwbuf = i_realloc(pwbuf, old_pwbuf_size, new_pwbuf_size);
+ if (pwbuf != NULL)
+ pwbuf_size = new_pwbuf_size;
}
}
static void gr_init(void)
{
size_t old_grbuf_size = grbuf_size;
+ size_t new_grbuf_size;
- if (grbuf == NULL || errno == ERANGE) {
- grbuf_size = nearest_power(old_grbuf_size + 1);
- if (grbuf_size < PWBUF_MIN_SIZE)
- grbuf_size = PWBUF_MIN_SIZE;
- grbuf = i_realloc(grbuf, old_grbuf_size, grbuf_size);
+ if (grbuf == NULL) {
+ new_grbuf_size = sysconf(_SC_GETGR_R_SIZE_MAX);
+ grbuf = i_realloc(grbuf, old_grbuf_size, new_grbuf_size);
+ if (grbuf != NULL)
+ grbuf_size = new_grbuf_size;
}
}
@@ -50,11 +52,6 @@ int i_getpwnam(const char *name, struct passwd *pwd_r)
do {
pw_init();
errno = getpwnam_r(name, pwd_r, pwbuf, pwbuf_size, &result);
-#ifdef __OpenBSD__
- /* OpenBSD returns 1 for all errors, assume it's ERANGE */
- if (errno == 1)
- errno = ERANGE;
-#endif
} while (errno == ERANGE);
if (result != NULL)
return 1;
@@ -73,11 +70,6 @@ int i_getpwuid(uid_t uid, struct passwd *pwd_r)
do {
pw_init();
errno = getpwuid_r(uid, pwd_r, pwbuf, pwbuf_size, &result);
-#ifdef __OpenBSD__
- /* OpenBSD returns 1 for all errors, assume it's ERANGE */
- if (errno == 1)
- errno = ERANGE;
-#endif
} while (errno == ERANGE);
if (result != NULL)
return 1;
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
