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| author | Arnd Bergmann <arnd@arndb.de> | 2017-10-19 15:29:04 +0300 |
|---|---|---|
| committer | James Morris <james.l.morris@oracle.com> | 2017-10-21 05:21:06 +0300 |
| commit | 927340926ed61477e34f960eec64b7532e35d2f0 (patch) | |
| tree | 8e48e194ded6863826462df91a837925bca559df /security/tomoyo/common.c | |
| parent | dbbbe1105ea6aa0c49d78a4ea0d924e0c02307eb (diff) | |
| download | linux-927340926ed61477e34f960eec64b7532e35d2f0.tar.xz | |
tomoyo: fix timestamping for y2038
Tomoyo uses an open-coded version of time_to_tm() to create a timestamp
from the current time as read by get_seconds(). This will overflow and
give wrong results on 32-bit systems in 2038.
To correct this, this changes the code to use ktime_get_real_seconds()
and the generic time64_to_tm() function that are both y2038-safe.
Using the library function avoids adding an expensive 64-bit division
in this code and can benefit from any optimizations we do in common
code.
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Diffstat (limited to 'security/tomoyo/common.c')
| -rw-r--r-- | security/tomoyo/common.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c index e0fb75052550..c19970db89c4 100644 --- a/security/tomoyo/common.c +++ b/security/tomoyo/common.c @@ -2256,7 +2256,7 @@ static const char * const tomoyo_memory_headers[TOMOYO_MAX_MEMORY_STAT] = { /* Timestamp counter for last updated. */ static unsigned int tomoyo_stat_updated[TOMOYO_MAX_POLICY_STAT]; /* Counter for number of updates. */ -static unsigned int tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; +static time64_t tomoyo_stat_modified[TOMOYO_MAX_POLICY_STAT]; /** * tomoyo_update_stat - Update statistic counters. @@ -2271,7 +2271,7 @@ void tomoyo_update_stat(const u8 index) * I don't use atomic operations because race condition is not fatal. */ tomoyo_stat_updated[index]++; - tomoyo_stat_modified[index] = get_seconds(); + tomoyo_stat_modified[index] = ktime_get_real_seconds(); } /** |