Date: Fri, 3 May 2019 21:26:44 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r347063 - head/sys/kern Message-ID: <201905032126.x43LQilu092655@repo.freebsd.org>
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Author: markj Date: Fri May 3 21:26:44 2019 New Revision: 347063 URL: https://svnweb.freebsd.org/changeset/base/347063 Log: Disallow excessively small times of day in clock_settime(2). Reported by: syzkaller Reviewed by: cem, kib MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D20151 Modified: head/sys/kern/kern_time.c Modified: head/sys/kern/kern_time.c ============================================================================== --- head/sys/kern/kern_time.c Fri May 3 21:13:09 2019 (r347062) +++ head/sys/kern/kern_time.c Fri May 3 21:26:44 2019 (r347063) @@ -412,7 +412,9 @@ kern_clock_settime(struct thread *td, clockid_t clock_ if (ats->tv_nsec < 0 || ats->tv_nsec >= 1000000000 || ats->tv_sec < 0) return (EINVAL); - if (!allow_insane_settime && ats->tv_sec > 8000ULL * 365 * 24 * 60 * 60) + if (!allow_insane_settime && + (ats->tv_sec > 8000ULL * 365 * 24 * 60 * 60 || + ats->tv_sec < utc_offset())) return (EINVAL); /* XXX Don't convert nsec->usec and back */ TIMESPEC_TO_TIMEVAL(&atv, ats);
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