Date: Sun, 25 Sep 2016 18:29:03 +0000 (UTC) From: Tijl Coosemans <tijl@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r306318 - head/sys/i386/i386 Message-ID: <201609251829.u8PIT33V046702@repo.freebsd.org>
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Author: tijl Date: Sun Sep 25 18:29:02 2016 New Revision: 306318 URL: https://svnweb.freebsd.org/changeset/base/306318 Log: MFamd64: r266901 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 MFC after: 2 weeks Modified: head/sys/i386/i386/sys_machdep.c Modified: head/sys/i386/i386/sys_machdep.c ============================================================================== --- head/sys/i386/i386/sys_machdep.c Sun Sep 25 17:58:55 2016 (r306317) +++ head/sys/i386/i386/sys_machdep.c Sun Sep 25 18:29:02 2016 (r306318) @@ -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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