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MDEV-18630 Uninitialised value in FOREIGN KEY error message

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dict_create_foreign_constraints_low(): Clean up the way in
which the error messages are initialized, and ensure that
the table name is always initialized.
This commit is contained in:
Marko Mäkelä 2019-02-18 21:42:58 +02:00
parent 5b82751111
commit 98e185ee37
4 changed files with 59 additions and 64 deletions
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13
mysql-test/suite/innodb/r/foreign_key.result
View file

@ -92,3 +92,16 @@ Warnings:
Warning 1088 failed to load FOREIGN KEY constraints
ALTER TABLE t1 ADD FULLTEXT INDEX ft2 (f);
DROP TABLE t1;
#
# MDEV-18630 Conditional jump or move depends on uninitialised value
# in ib_push_warning / dict_create_foreign_constraints_low
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
ALTER IGNORE TABLE t1 ADD FOREIGN KEY (a) REFERENCES t2 (b);
ERROR HY000: Can't create table `test`.`#sql-temporary` (errno: 150 "Foreign key constraint is incorrectly formed")
SHOW WARNINGS;
Level Code Message
Warning 150 Alter table test/#sql-temporary with foreign key constraint failed. Referenced table `test`.`t2` not found in the data dictionary near 'FOREIGN KEY (a) REFERENCES t2 (b)'.
Error 1005 Can't create table `test`.`#sql-temporary` (errno: 150 "Foreign key constraint is incorrectly formed")
Warning 1215 Cannot add foreign key constraint
DROP TABLE t1;

12
mysql-test/suite/innodb/t/foreign_key.test
View file

@ -113,3 +113,15 @@ SET SESSION FOREIGN_KEY_CHECKS = ON;
ALTER TABLE t1 ADD FULLTEXT INDEX ft1 (f);
ALTER TABLE t1 ADD FULLTEXT INDEX ft2 (f);
DROP TABLE t1;
--echo #
--echo # MDEV-18630 Conditional jump or move depends on uninitialised value
--echo # in ib_push_warning / dict_create_foreign_constraints_low
--echo #
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
--replace_regex /#sql-[0-9_a-f-]*/#sql-temporary/
--error ER_CANT_CREATE_TABLE
ALTER IGNORE TABLE t1 ADD FOREIGN KEY (a) REFERENCES t2 (b);
--replace_regex /#sql-[0-9_a-f-]*/#sql-temporary/
SHOW WARNINGS;
DROP TABLE t1;

49
storage/innobase/dict/dict0dict.cc
View file

@ -4396,7 +4396,6 @@ dict_create_foreign_constraints_low(
const char* create_table_name;
const char* orig;
char create_name[MAX_TABLE_NAME_LEN + 1];
char operation[8];
ut_ad(!srv_read_only_mode);
ut_ad(mutex_own(&(dict_sys->mutex)));
@ -4407,41 +4406,33 @@ dict_create_foreign_constraints_low(
orig = ptr;
ptr = dict_accept(cs, ptr, "ALTER", &success);
strcpy((char *)operation, success ? "Alter " : "Create ");
const char* const operation = success ? "Alter " : "Create ";
if (!success) {
orig = ptr;
ptr = dict_scan_to(ptr, "CREATE");
ptr = dict_scan_to(ptr, "TABLE");
ptr = dict_accept(cs, ptr, "TABLE", &success);
create_table_name = NULL;
if (success) {
ptr = dict_scan_table_name(cs, ptr, &table_to_create, name,
&success, heap, &create_table_name);
&success, heap, &create_table_name);
}
if (success) {
char *bufend;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
create_table_name, strlen(create_table_name),
trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
ptr = orig;
} else {
char *bufend;
ptr = orig;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
name, strlen(name), trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
}
goto loop;
ptr = orig;
const char* n = create_table_name ? create_table_name : name;
char *bufend = innobase_convert_name(create_name, MAX_TABLE_NAME_LEN,
n, strlen(n), trx->mysql_thd, TRUE);
create_name[bufend-create_name] = '\0';
} else {
strncpy(create_name, name, sizeof create_name);
create_name[(sizeof create_name) - 1] = '\0';
}
if (table == NULL) {
mutex_enter(&dict_foreign_err_mutex);
dict_foreign_error_report_low(ef, create_name);
dict_foreign_error_report_low(ef, create_name);
fprintf(ef, "%s table %s with foreign key constraint"
" failed. Table %s not found from data dictionary."
" Error close to %s.\n",
@ -4476,19 +4467,13 @@ dict_create_foreign_constraints_low(
ptr = dict_scan_table_name(cs, ptr, &table_to_alter, name,
&success, heap, &referenced_table_name);
if (table_to_alter) {
char *bufend;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
table_to_alter->name, strlen(table_to_alter->name),
trx->mysql_thd, TRUE);
{
const char* n = table_to_alter
? table_to_alter->name : referenced_table_name;
char* bufend = innobase_convert_name(
create_name, MAX_TABLE_NAME_LEN, n, strlen(n),
trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
} else {
char *bufend;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
referenced_table_name, strlen(referenced_table_name),
trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
}
if (!success) {

49
storage/xtradb/dict/dict0dict.cc
View file

@ -4405,7 +4405,6 @@ dict_create_foreign_constraints_low(
const char* create_table_name;
const char* orig;
char create_name[MAX_TABLE_NAME_LEN + 1];
char operation[8];
ut_ad(!srv_read_only_mode);
ut_ad(mutex_own(&(dict_sys->mutex)));
@ -4416,41 +4415,33 @@ dict_create_foreign_constraints_low(
orig = ptr;
ptr = dict_accept(cs, ptr, "ALTER", &success);
strcpy((char *)operation, success ? "Alter " : "Create ");
const char* const operation = success ? "Alter " : "Create ";
if (!success) {
orig = ptr;
ptr = dict_scan_to(ptr, "CREATE");
ptr = dict_scan_to(ptr, "TABLE");
ptr = dict_accept(cs, ptr, "TABLE", &success);
create_table_name = NULL;
if (success) {
ptr = dict_scan_table_name(cs, ptr, &table_to_create, name,
&success, heap, &create_table_name);
&success, heap, &create_table_name);
}
if (success) {
char *bufend;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
create_table_name, strlen(create_table_name),
trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
ptr = orig;
} else {
char *bufend;
ptr = orig;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
name, strlen(name), trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
}
goto loop;
ptr = orig;
const char* n = create_table_name ? create_table_name : name;
char *bufend = innobase_convert_name(create_name, MAX_TABLE_NAME_LEN,
n, strlen(n), trx->mysql_thd, TRUE);
create_name[bufend-create_name] = '\0';
} else {
strncpy(create_name, name, sizeof create_name);
create_name[(sizeof create_name) - 1] = '\0';
}
if (table == NULL) {
mutex_enter(&dict_foreign_err_mutex);
dict_foreign_error_report_low(ef, create_name);
dict_foreign_error_report_low(ef, create_name);
fprintf(ef, "%s table %s with foreign key constraint"
" failed. Table %s not found from data dictionary."
" Error close to %s.\n",
@ -4485,19 +4476,13 @@ dict_create_foreign_constraints_low(
ptr = dict_scan_table_name(cs, ptr, &table_to_alter, name,
&success, heap, &referenced_table_name);
if (table_to_alter) {
char *bufend;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
table_to_alter->name, strlen(table_to_alter->name),
trx->mysql_thd, TRUE);
{
const char* n = table_to_alter
? table_to_alter->name : referenced_table_name;
char* bufend = innobase_convert_name(
create_name, MAX_TABLE_NAME_LEN, n, strlen(n),
trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
} else {
char *bufend;
bufend = innobase_convert_name((char *)create_name, MAX_TABLE_NAME_LEN,
referenced_table_name, strlen(referenced_table_name),
trx->mysql_thd, TRUE);
create_name[bufend-create_name]='\0';
}
if (!success) {