Date: Sun, 2 Apr 2017 16:36:51 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Dmitry Chagin <dchagin@FreeBSD.org> Cc: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r316393 - head/sys/compat/linux Message-ID: <20170402133651.GJ43712@kib.kiev.ua> In-Reply-To: <201704020746.v327kDSN042840@repo.freebsd.org> References: <201704020746.v327kDSN042840@repo.freebsd.org>
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On Sun, Apr 02, 2017 at 07:46:13AM +0000, Dmitry Chagin wrote: > Author: dchagin > Date: Sun Apr 2 07:46:13 2017 > New Revision: 316393 > URL: https://svnweb.freebsd.org/changeset/base/316393 > > Log: > As noted by bde@ negative tv_sec values are not checked for overflow, > so overflow can still occur. Fix that. Also remove the extra check for > tv_sec size as under COMPAT_LINUX32 it is always true. > > Pointed out by: bde@ > > MFC after: 1 week > > Modified: > head/sys/compat/linux/linux_time.c > > Modified: head/sys/compat/linux/linux_time.c > ============================================================================== > --- head/sys/compat/linux/linux_time.c Sun Apr 2 07:11:15 2017 (r316392) > +++ head/sys/compat/linux/linux_time.c Sun Apr 2 07:46:13 2017 (r316393) > @@ -125,8 +125,7 @@ native_to_linux_timespec(struct l_timesp > > LIN_SDT_PROBE2(time, native_to_linux_timespec, entry, ltp, ntp); > #ifdef COMPAT_LINUX32 > - if (ntp->tv_sec > INT_MAX && > - sizeof(ltp->tv_sec) != sizeof(ntp->tv_sec)) > + if (ntp->tv_sec > INT_MAX || ntp->tv_sec < INT_MIN) This line reads as only tv_sec == INT_MAX case results in non-EOVERFLOW condition. > return (EOVERFLOW); > #endif > ltp->tv_sec = ntp->tv_sec;
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