git: a097a58543dc - stable/13 - fork: Copy the vm_stacktop field into the new vmspace
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Date: Wed, 16 Feb 2022 17:59:16 UTC
The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=a097a58543dc86354f8979a276093e90000a4bbd commit a097a58543dc86354f8979a276093e90000a4bbd Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2022-01-18 15:42:21 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2022-02-16 16:55:11 +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 (cherry picked from commit 46d35d415aa9664b0ddc98a76e453eec20af0016) --- 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 cf2c96f9ab73..4c3448c358da 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -4265,6 +4265,7 @@ 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);