Date: Mon, 10 Oct 2016 11:51:47 +0000 (UTC) From: Tijl Coosemans <tijl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r306960 - stable/11/sys/i386/i386 Message-ID: <201610101151.u9ABplsw052788@repo.freebsd.org>
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Author: tijl Date: Mon Oct 10 11:51:47 2016 New Revision: 306960 URL: https://svnweb.freebsd.org/changeset/base/306960 Log: MFC: r306318 Allocate a zeroed LDT. Failing to do this might result in the LDT appearing to run out of free descriptors because of random junk in the descriptor's 'sd_type' field. http://lists.freebsd.org/pipermail/freebsd-amd64/2014-May/016088.html PR: 212639 Submitted by: wheelcomplex@gmail.com Modified: stable/11/sys/i386/i386/sys_machdep.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/i386/i386/sys_machdep.c ============================================================================== --- stable/11/sys/i386/i386/sys_machdep.c Mon Oct 10 11:49:43 2016 (r306959) +++ stable/11/sys/i386/i386/sys_machdep.c Mon Oct 10 11:51:47 2016 (r306960) @@ -438,7 +438,7 @@ user_ldt_alloc(struct mdproc *mdp, int l new_ldt->ldt_len = len = NEW_MAX_LD(len); new_ldt->ldt_base = (caddr_t)kmem_malloc(kernel_arena, - len * sizeof(union descriptor), M_WAITOK); + len * sizeof(union descriptor), M_WAITOK | M_ZERO); new_ldt->ldt_refcnt = 1; new_ldt->ldt_active = 0;
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