Date: Mon, 1 Nov 2021 14:33:10 GMT From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: ab77265f883a - stable/13 - amd64: Mark the trapframe as initialized in trap() Message-ID: <202111011433.1A1EXAo6021604@gitrepo.freebsd.org>
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The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=ab77265f883ad5ddb71d41432ffa77401608e1b1 commit ab77265f883ad5ddb71d41432ffa77401608e1b1 Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2021-07-10 00:38:03 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2021-11-01 14:06:39 +0000 amd64: Mark the trapframe as initialized in trap() Otherwise KASAN may generate false positives if the trapframe was written into a poisoned region of the stack. Reported by: pho Sponsored by: The FreeBSD Foundation (cherry picked from commit f08f0ae5247ab31de58bda0817e74ccc1a3a5e95) --- sys/amd64/amd64/trap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/sys/amd64/amd64/trap.c b/sys/amd64/amd64/trap.c index 942c99c4826e..55649687ce50 100644 --- a/sys/amd64/amd64/trap.c +++ b/sys/amd64/amd64/trap.c @@ -54,6 +54,7 @@ __FBSDID("$FreeBSD$"); #include "opt_kdb.h" #include <sys/param.h> +#include <sys/asan.h> #include <sys/bus.h> #include <sys/systm.h> #include <sys/proc.h> @@ -227,6 +228,8 @@ trap(struct trapframe *frame) p = td->td_proc; dr6 = 0; + kasan_mark(frame, sizeof(*frame), sizeof(*frame), 0); + VM_CNT_INC(v_trap); type = frame->tf_trapno;
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