[PATCH v1 1/1] xlog: fix out of static memory on metadata load
Kirill Shcherbatov
kshcherbatov at tarantool.org
Wed Aug 15 15:32:02 MSK 2018
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
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