[tarantool-patches] [PATCH v1 05/10] sql: EXPLAIN through net.box leads to SEGFAULT
imeevma at tarantool.org
imeevma at tarantool.org
Sat Nov 17 17:03:59 MSK 2018
EXPLAIN envokes SEGMENTATION FAULT when being executed through
net.box. It happens due to column type of the result of this
function being NULL.
Needed for #3505
---
src/box/execute.c | 11 +++++++----
src/box/lua/net_box.c | 15 ++++++++-------
test/sql/iproto.result | 11 +++++++++++
test/sql/iproto.test.lua | 9 ++++++++-
4 files changed, 34 insertions(+), 12 deletions(-)
diff --git a/src/box/execute.c b/src/box/execute.c
index 80ad655..da2f09c 100644
--- a/src/box/execute.c
+++ b/src/box/execute.c
@@ -468,15 +468,18 @@ sql_get_description(struct sqlite3_stmt *stmt, struct vstream *stream,
* column_name simply returns them.
*/
assert(name != NULL);
- vstream_encode_map(stream, 2);
+ int map_size = (type == NULL) ? 1 : 2;
+ vstream_encode_map(stream, map_size);
vstream_encode_enum(stream, IPROTO_FIELD_NAME, "name");
vstream_encode_str(stream, name);
vstream_encode_map_commit(stream);
- vstream_encode_enum(stream, IPROTO_FIELD_TYPE, "type");
- vstream_encode_str(stream, type);
- vstream_encode_map_commit(stream);
+ if (map_size == 2) {
+ vstream_encode_enum(stream, IPROTO_FIELD_TYPE, "type");
+ vstream_encode_str(stream, type);
+ vstream_encode_map_commit(stream);
+ }
vstream_encode_array_commit(stream, i);
}
diff --git a/src/box/lua/net_box.c b/src/box/lua/net_box.c
index c7063d9..342c6a7 100644
--- a/src/box/lua/net_box.c
+++ b/src/box/lua/net_box.c
@@ -644,8 +644,7 @@ netbox_decode_metadata(struct lua_State *L, const char **data)
lua_createtable(L, count, 0);
for (uint32_t i = 0; i < count; ++i) {
uint32_t map_size = mp_decode_map(data);
- assert(map_size == 2);
- (void) map_size;
+ assert(map_size == 1 || map_size == 2);
uint32_t key = mp_decode_uint(data);
assert(key == IPROTO_FIELD_NAME);
(void) key;
@@ -654,11 +653,13 @@ netbox_decode_metadata(struct lua_State *L, const char **data)
const char *str = mp_decode_str(data, &len);
lua_pushlstring(L, str, len);
lua_setfield(L, -2, "name");
- key = mp_decode_uint(data);
- assert(key == IPROTO_FIELD_TYPE);
- const char *type = mp_decode_str(data, &len);
- lua_pushlstring(L, type, len);
- lua_setfield(L, -2, "type");
+ if (map_size == 2) {
+ key = mp_decode_uint(data);
+ assert(key == IPROTO_FIELD_TYPE);
+ const char *type = mp_decode_str(data, &len);
+ lua_pushlstring(L, type, len);
+ lua_setfield(L, -2, "type");
+ }
lua_rawseti(L, -2, i + 1);
}
}
diff --git a/test/sql/iproto.result b/test/sql/iproto.result
index d077ee8..0571a3b 100644
--- a/test/sql/iproto.result
+++ b/test/sql/iproto.result
@@ -773,6 +773,17 @@ cn:execute('drop table test')
cn:close()
---
...
+-- gh-3505: Remove box.sql.execute
+cn = remote.connect(box.cfg.listen)
+---
+...
+-- Segmentation fault when EXPLAIN executed using net.box.
+_ = cn:execute("EXPLAIN SELECT 1;")
+---
+...
+cn:close()
+---
+...
box.schema.user.revoke('guest', 'read,write,execute', 'universe')
---
...
diff --git a/test/sql/iproto.test.lua b/test/sql/iproto.test.lua
index 1470eda..e708bb2 100644
--- a/test/sql/iproto.test.lua
+++ b/test/sql/iproto.test.lua
@@ -247,10 +247,17 @@ cn:execute('drop table test')
cn:close()
+-- gh-3505: Remove box.sql.execute
+cn = remote.connect(box.cfg.listen)
+
+-- Segmentation fault when EXPLAIN executed using net.box.
+_ = cn:execute("EXPLAIN SELECT 1;")
+
+cn:close()
+
box.schema.user.revoke('guest', 'read,write,execute', 'universe')
box.schema.user.revoke('guest', 'create', 'space')
space = nil
-- Cleanup xlog
box.snapshot()
-
--
2.7.4
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