Date: Tue, 18 Jan 2022 15:53:12 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 46d35d415aa9 - main - fork: Copy the vm_stacktop field into the new vmspace Message-ID: <202201181553.20IFrCd8003273@gitrepo.freebsd.org>
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The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=46d35d415aa9664b0ddc98a76e453eec20af0016 commit 46d35d415aa9664b0ddc98a76e453eec20af0016 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2022-01-18 15:42:21 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2022-01-18 15:51:49 +0000 fork: Copy the vm_stacktop field into the new vmspace Fixes: 1811c1e957ee ("exec: Reimplement stack address randomization") Reported by: pho Reported by: syzbot+0446312a51bc13ead834@syzkaller.appspotmail.com Sponsored by: The FreeBSD Foundation --- sys/vm/vm_map.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index 98d3d1e5bb1d..8d654f5ac612 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -4263,6 +4263,7 @@ vmspace_fork(struct vmspace *vm1, vm_ooffset_t *fork_charge) vm2->vm_taddr = vm1->vm_taddr; vm2->vm_daddr = vm1->vm_daddr; vm2->vm_maxsaddr = vm1->vm_maxsaddr; + vm2->vm_stacktop = vm1->vm_stacktop; vm_map_lock(old_map); if (old_map->busy) vm_map_wait_busy(old_map);
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