From 94172affa43af15fe3b50293a96c292eca30c386 Mon Sep 17 00:00:00 2001 From: Konstantin Belousov Date: Sat, 10 Apr 2021 02:25:06 +0300 Subject: [PATCH] amd64: clear debug registers on execing 32bit Linux binary Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29687 --- sys/amd64/linux32/linux32_sysvec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/amd64/linux32/linux32_sysvec.c b/sys/amd64/linux32/linux32_sysvec.c index bb86baefaec..3790d0fcb69 100644 --- a/sys/amd64/linux32/linux32_sysvec.c +++ b/sys/amd64/linux32/linux32_sysvec.c @@ -722,6 +722,8 @@ linux_exec_setregs(struct thread *td, struct image_params *imgp, regs->tf_cs = _ucode32sel; regs->tf_rbx = (register_t)imgp->ps_strings; + x86_clear_dbregs(pcb); + fpstate_drop(td); /* Do full restore on return so that we can change to a different %cs */