Tarantool development patches archive
 help / color / mirror / Atom feed
* [PATCH v1 1/1] xlog: fix out of static memory on metadata load
@ 2018-08-15 12:32 Kirill Shcherbatov
  2018-08-17 10:14 ` Vladimir Davydov
  0 siblings, 1 reply; 6+ messages in thread
From: Kirill Shcherbatov @ 2018-08-15 12:32 UTC (permalink / raw)
  To: tarantool-patches; +Cc: vdavydov.dev, Kirill Shcherbatov

This problem triggered asan checks on start tarantool
with existent xlog. We don't have to touch even static
non-initialized memory.
---
Branch: http://github.com/tarantool/tarantool/tree/kshch/vinyl-xlog-out-of-static-memory

 src/box/xlog.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/box/xlog.c b/src/box/xlog.c
index 5ed11fc..797f153 100644
--- a/src/box/xlog.c
+++ b/src/box/xlog.c
@@ -261,8 +261,11 @@ xlog_meta_parse(struct xlog_meta *meta, const char **data,
 		assert(val <= val_end);
 		pos = eol + 1;
 
-		if (memcmp(key, INSTANCE_UUID_KEY, key_end - key) == 0 ||
-		    memcmp(key, INSTANCE_UUID_KEY_V12, key_end - key) == 0) {
+		size_t len = key_end - key;
+		if ((len == strlen(INSTANCE_UUID_KEY) &&
+		    memcmp(key, INSTANCE_UUID_KEY, len) == 0) ||
+		    (len == strlen(INSTANCE_UUID_KEY_V12) &&
+		    memcmp(key, INSTANCE_UUID_KEY_V12, key_end - key) == 0)) {
 			/*
 			 * Instance: <uuid>
 			 */
@@ -277,19 +280,22 @@ xlog_meta_parse(struct xlog_meta *meta, const char **data,
 				diag_set(XlogError, "can't parse instance UUID");
 				return -1;
 			}
-		} else if (memcmp(key, VCLOCK_KEY, key_end - key) == 0){
+		} else if (len == strlen(VCLOCK_KEY) &&
+			   memcmp(key, VCLOCK_KEY, len) == 0) {
 			/*
 			 * VClock: <vclock>
 			 */
 			if (parse_vclock(val, val_end, &meta->vclock) != 0)
 				return -1;
-		} else if (memcmp(key, PREV_VCLOCK_KEY, key_end - key) == 0) {
+		} else if (len == strlen(PREV_VCLOCK_KEY) &&
+			   memcmp(key, PREV_VCLOCK_KEY, len) == 0) {
 			/*
 			 * PrevVClock: <vclock>
 			 */
 			if (parse_vclock(val, val_end, &meta->prev_vclock) != 0)
 				return -1;
-		} else if (memcmp(key, VERSION_KEY, key_end - key) == 0) {
+		} else if (len == strlen(VERSION_KEY) &&
+			   memcmp(key, VERSION_KEY, len) == 0) {
 			/* Ignore Version: for now */
 		} else {
 			/*
-- 
2.7.4

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2018-08-17 15:20 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-08-15 12:32 [PATCH v1 1/1] xlog: fix out of static memory on metadata load Kirill Shcherbatov
2018-08-17 10:14 ` Vladimir Davydov
2018-08-17 12:39   ` [tarantool-patches] " Kirill Shcherbatov
2018-08-17 12:46     ` Vladimir Davydov
2018-08-17 14:46       ` Kirill Shcherbatov
2018-08-17 15:20         ` Vladimir Davydov

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox