diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | NEWS | 36 | ||||
| -rw-r--r-- | inet/rcmd.c | 50 |
3 files changed, 55 insertions, 37 deletions
@@ -1,3 +1,9 @@ +2015-06-18 Carlos O'Donell <carlos@redhat.com> + + [BZ #18557] + * inet/rcmd.c (__validuser2_sa): Check user first to + short-circuit host check. + 2015-07-07 Pavel Kopyl <p.kopyl@samsung.com> Mikhail Ilin <m.ilin@samsung.com> @@ -9,24 +9,24 @@ Version 2.22 * The following bugs are resolved with this release: - 438, 4719, 6792, 13028, 13064, 14094, 14841, 14906, 14958, 15319, 15467, - 15790, 15969, 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, - 16526, 16538, 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, - 17269, 17293, 17322, 17403, 17523, 17542, 17569, 17581, 17588, 17596, - 17620, 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, - 17833, 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, - 17965, 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, - 18007, 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, - 18042, 18043, 18046, 18047, 18049, 18068, 18080, 18093, 18100, 18104, - 18110, 18111, 18116, 18125, 18128, 18138, 18185, 18196, 18197, 18206, - 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, - 18287, 18319, 18324, 18333, 18346, 18371, 18397, 18409, 18410, 18412, - 18418, 18422, 18434, 18435, 18444, 18468, 18469, 18470, 18479, 18483, - 18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, 18519, - 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, - 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18558, - 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612, 18613, - 18619, 18633. + 438, 4719, 6792, 13028, 13064, 14094, 14841, 14906, 14958, 15319, + 15467, 15790, 15969, 16159, 16339, 16350, 16351, 16352, 16353, 16361, + 16512, 16526, 16538, 16559, 16560, 16704, 16783, 16850, 17053, 17090, + 17195, 17269, 17293, 17322, 17403, 17523, 17542, 17569, 17581, 17588, + 17596, 17620, 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, + 17792, 17833, 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, + 17964, 17965, 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, + 17999, 18007, 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, + 18039, 18042, 18043, 18046, 18047, 18049, 18068, 18080, 18093, 18100, + 18104, 18110, 18111, 18116, 18125, 18128, 18138, 18185, 18196, 18197, + 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245, + 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18397, 18409, 18410, + 18412, 18418, 18422, 18434, 18435, 18444, 18468, 18469, 18470, 18479, + 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, + 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, + 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, + 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, + 18612, 18613, 18619, 18633. * Cache information can be queried via sysconf() function on s390 e.g. with _SC_LEVEL1_ICACHE_SIZE as argument. diff --git a/inet/rcmd.c b/inet/rcmd.c index 98b3735..035cb0d 100644 --- a/inet/rcmd.c +++ b/inet/rcmd.c @@ -809,31 +809,43 @@ __validuser2_sa(hostf, ra, ralen, luser, ruser, rhost) *p = '\0'; /* <nul> terminate username (+host?) */ /* buf -> host(?) ; user -> username(?) */ + if (*buf == '\0') + break; + if (*user == '\0') + user = luser; + + /* First check the user part. In a naive implementation we + would check the host part first, then the user. However, + if we check the user first and reject the entry we will + have saved doing any host lookups to normalize the comparison + and that likely saves several DNS queries. Therefore we + check the user first. */ + ucheck = __icheckuser (user, ruser); + + /* Either we found the user, or we didn't and this is a + negative host check. We must do the negative host lookup + in order to preserve the semantics of stopping on this line + before processing others. */ + if (ucheck != 0 || *buf == '-') { + + /* Next check host part. */ + hcheck = __checkhost_sa (ra, ralen, buf, rhost); + + /* Negative '-host user(?)' match? */ + if (hcheck < 0) + break; - /* First check host part */ - hcheck = __checkhost_sa (ra, ralen, buf, rhost); - - if (hcheck < 0) - break; - - if (hcheck) { - /* Then check user part */ - if (! (*user)) - user = luser; - - ucheck = __icheckuser (user, ruser); - - /* Positive 'host user' match? */ - if (ucheck > 0) { + /* Positive 'host user' match? */ + if (hcheck > 0 && ucheck > 0) { retval = 0; break; } - /* Negative 'host -user' match? */ - if (ucheck < 0) - break; + /* Negative 'host -user' match? */ + if (hcheck > 0 && ucheck < 0) + break; - /* Neither, go on looking for match */ + /* Neither, go on looking for match. */ } } |