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| author | Sergey Glukhov <sergey.glukhov@oracle.com> | 2011-04-27 11:35:57 +0400 |
|---|---|---|
| committer | Sergey Glukhov <sergey.glukhov@oracle.com> | 2011-04-27 11:35:57 +0400 |
| commit | 735bab72c51e0ff4ccf5fb688826e87931ee8fe2 (patch) | |
| tree | 1f6c0c4052de0909882757e03e5dd205be533878 /sql-common/my_time.c | |
| parent | a014fd9367de2688e87ae63a74501f9498282091 (diff) | |
| download | mariadb-git-735bab72c51e0ff4ccf5fb688826e87931ee8fe2.tar.gz | |
Bug#11889186 60503: CRASH IN MAKE_DATE_TIME WITH DATE_FORMAT / STR_TO_DATE COMBINATION
calc_daynr() function returns negative result
if malformed date with zero year and month is used.
Attempt to calculate week day on negative value
leads to crash. The fix is return NULL for
'W', 'a', 'w' specifiers if zero year and month is used.
Additional fix for calc_daynr():
--added assertion that result can not be negative
--return 0 if zero year and month is used
Diffstat (limited to 'sql-common/my_time.c')
| -rw-r--r-- | sql-common/my_time.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sql-common/my_time.c b/sql-common/my_time.c index ca11c54a999..80a7e0daa2c 100644 --- a/sql-common/my_time.c +++ b/sql-common/my_time.c @@ -772,7 +772,7 @@ long calc_daynr(uint year,uint month,uint day) int y= year; /* may be < 0 temporarily */ DBUG_ENTER("calc_daynr"); - if (y == 0 && month == 0 && day == 0) + if (y == 0 && month == 0) DBUG_RETURN(0); /* Skip errors */ /* Cast to int to be able to handle month == 0 */ delsum= (long) (365 * y + 31 *((int) month - 1) + (int) day); @@ -783,6 +783,7 @@ long calc_daynr(uint year,uint month,uint day) temp=(int) ((y/100+1)*3)/4; DBUG_PRINT("exit",("year: %d month: %d day: %d -> daynr: %ld", y+(month <= 2),month,day,delsum+y/4-temp)); + DBUG_ASSERT(delsum+(int) y/4-temp > 0); DBUG_RETURN(delsum+(int) y/4-temp); } /* calc_daynr */ |