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| author | Gustavo André dos Santos Lopes <cataphract@php.net> | 2010-12-19 23:47:00 +0000 |
|---|---|---|
| committer | Gustavo André dos Santos Lopes <cataphract@php.net> | 2010-12-19 23:47:00 +0000 |
| commit | 433dff36d7df5e7703850c71121b10e9c6b725fe (patch) | |
| tree | 2e35b5233159b382990382958ab586e75e3e4823 /ext/calendar/julian.c | |
| parent | d88515e1b830de22d3083cc66bb6d7ee5ec1811e (diff) | |
| download | php-git-433dff36d7df5e7703850c71121b10e9c6b725fe.tar.gz | |
- Fixed bug #53574 (Integer overflow in SdnToJulian, sometimes leading to
segfault).
Diffstat (limited to 'ext/calendar/julian.c')
| -rw-r--r-- | ext/calendar/julian.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/ext/calendar/julian.c b/ext/calendar/julian.c index 39bcbc7e65..17e7bcb597 100644 --- a/ext/calendar/julian.c +++ b/ext/calendar/julian.c @@ -146,6 +146,7 @@ **************************************************************************/ #include "sdncal.h" +#include <limits.h> #define JULIAN_SDN_OFFSET 32083 #define DAYS_PER_5_MONTHS 153 @@ -164,15 +165,22 @@ void SdnToJulian( int dayOfYear; if (sdn <= 0) { - *pYear = 0; - *pMonth = 0; - *pDay = 0; - return; + goto fail; } - temp = (sdn + JULIAN_SDN_OFFSET) * 4 - 1; + /* Check for overflow */ + if (sdn > (LONG_MAX - JULIAN_SDN_OFFSET * 4 + 1) / 4 || sdn < LONG_MIN / 4) { + goto fail; + } + temp = sdn * 4 + (JULIAN_SDN_OFFSET * 4 - 1); /* Calculate the year and day of year (1 <= dayOfYear <= 366). */ - year = temp / DAYS_PER_4_YEARS; + { + long yearl = temp / DAYS_PER_4_YEARS; + if (yearl > INT_MAX || yearl < INT_MIN) { + goto fail; + } + year = (int) yearl; + } dayOfYear = (temp % DAYS_PER_4_YEARS) / 4 + 1; /* Calculate the month and day of month. */ @@ -196,6 +204,12 @@ void SdnToJulian( *pYear = year; *pMonth = month; *pDay = day; + return; + +fail: + *pYear = 0; + *pMonth = 0; + *pDay = 0; } long int JulianToSdn( |