Date: Wed, 21 Feb 2018 11:31:30 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r329707 - stable/10/sys/vm Message-ID: <201802211131.w1LBVUaE008763@repo.freebsd.org>
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Author: kib Date: Wed Feb 21 11:31:29 2018 New Revision: 329707 URL: https://svnweb.freebsd.org/changeset/base/329707 Log: MFC r329254: Ensure memory consistency on COW. Modified: stable/10/sys/vm/vm_fault.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/vm/vm_fault.c ============================================================================== --- stable/10/sys/vm/vm_fault.c Wed Feb 21 11:29:07 2018 (r329706) +++ stable/10/sys/vm/vm_fault.c Wed Feb 21 11:31:29 2018 (r329707) @@ -893,6 +893,10 @@ readrest: */ pmap_copy_page(fs.m, fs.first_m); fs.first_m->valid = VM_PAGE_BITS_ALL; + if ((fault_flags & VM_FAULT_WIRE) == 0) { + prot &= ~VM_PROT_WRITE; + fault_type &= ~VM_PROT_WRITE; + } if (wired && (fault_flags & VM_FAULT_WIRE) == 0) { vm_page_lock(fs.first_m);
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