From nobody Sun Apr 12 13:44:30 2026 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4ftsGQ6fp4z6ZM45 for ; Sun, 12 Apr 2026 13:44:30 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R12" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4ftsGQ53Rzz3lLt for ; Sun, 12 Apr 2026 13:44:30 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1776001470; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=1tSjLr2g+98hydgpy8fzMp3DrATkGBB0V5an5HBDZFI=; b=FExXNDmu/gbAPbwsU6IF7oW81FAryKbqaUoXxGWDR3jYHFz8EXD2YoXTVbuB0N0aMHup7C 17zF+02Bmmzej+FJS4CrEUS/UVVuWHna0B+dRkv+BkBpi3023jRuWWwZqWR/b9FoQMTFUl Ec1rwFKtoasHGrJIBuDh9CsPIzaaWPoDMQNA7XRr71IkQvLjBsfOSjVoYGPHfUN0AwTdhj K0+fWn9uPfVDowkziCMBeELENIIE3Mh4p2ryMyNGIdrkSeYDWyLzJK5G/25080z4OvqBnC UDgoG183kdLGIFHfAGtklX8ZenOAUvoNocew+o/ecdx0yW2H6zRebwbyIEVinA== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1776001470; a=rsa-sha256; cv=none; b=IVLBs0yOp7r7de2tW42TumFs6hWIDe2u3QJ0RNZNUfOA0TxZ1+5JuqSeJOlsjfLnmq4iMi qq25qJpZcIZgdoMjt/mpaaOLp3zYwrUW5dRNK1DYWZE2vEWd9n8O51yJ9UvH9sTpzsvXZQ r3gXfTtreF9L3+pImJTTLCC8vty7CF35fIRP6REMzQaJJVB2ULwqjZcGhrR2mUSsq/glu3 y7Y1bLaT75OSykfKu/MFyguc7aqxk7j6r94+9DLCFUlZAfGpbir0VLcVDjLe5/kJYp7Vur 4O5P9tKzVqUtJzAdrNU9VFG2+cPhnYg2GNIMoop+1IrCp+L9GR9g4Ew2I6Fq8w== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1776001470; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=1tSjLr2g+98hydgpy8fzMp3DrATkGBB0V5an5HBDZFI=; b=bMgCYhppxboyY/vdyO8JdD+9mQg8OXNiaAomR3FMBeE1D2YHwyb9sbzsIGYJdkm0+UxgRG fJJ0yM+a2TDuARwuYVrhfzmBS8GFqvAXqdOguNyBe0zgTzT85N+fySlwhBhM+3kpNaUYbb RNOAtLs0kqaG7ayNWiC5RPZQ2tAHzHaKUseFfn9ujKynfN9ub0TuBoXoAAOJlSSVBTIhsj uJvW8ZcQnUPdIhuorZpv5xfX+93QaKiNax35QGb9ZZtSW0mICTTIvmKLa/nDvbk2j91rpO 9xXUUxCd46sRlZ1lnRGutGq8Udw5NgAHWDao2wC1GKaHVITkxVYCms9/9LiSZg== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4ftsGQ4Jwmz41R for ; Sun, 12 Apr 2026 13:44:30 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 43295 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Sun, 12 Apr 2026 13:44:30 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Cc: Kristofer Peterson From: Kyle Evans Subject: git: 9d87f30b3322 - stable/14 - kern/amd64/machdep: Replace memset in wrmsr_early_safe_end List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-all@freebsd.org Sender: owner-dev-commits-src-all@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kevans X-Git-Repository: src X-Git-Refname: refs/heads/stable/14 X-Git-Reftype: branch X-Git-Commit: 9d87f30b3322c910a2cb68442e5d35daea59df82 Auto-Submitted: auto-generated Date: Sun, 12 Apr 2026 13:44:30 +0000 Message-Id: <69dba1be.43295.2bd88560@gitrepo.freebsd.org> The branch stable/14 has been updated by kevans: URL: https://cgit.FreeBSD.org/src/commit/?id=9d87f30b3322c910a2cb68442e5d35daea59df82 commit 9d87f30b3322c910a2cb68442e5d35daea59df82 Author: Kristofer Peterson AuthorDate: 2026-03-09 19:40:34 +0000 Commit: Kyle Evans CommitDate: 2026-04-12 13:43:46 +0000 kern/amd64/machdep: Replace memset in wrmsr_early_safe_end GENERIC-KASAN kernel failed to boot on a Dell PowerEdge C6615 with an AMD EPYC 8224P CPU; UEFI BIOS caught a #GP exception with %RIP in kasan_memset where %GS relative pointer (curthread->td_pflags2) was dereferenced. Investigation led to wrmsr_early_safe_end which calls memset to clear early #GP IDT entry. Replacing memset with __builtin_memset_inline still resulted in the compiler emitting a call to the memset resolver in GENERIC-KASAN build and the kernel stil faulted during boot. This version which has been successfully tested with both GENERIC and GENERIC-KASAN kernels uses memset_early. Signed-off-by: Kristofer Peterson Reviewed-by: kib (cherry picked from commit 615f1b9eb17c921bbcb0cce2b9ad61910361325b) --- sys/amd64/amd64/machdep.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index f5733eef685e..e4761a2e8579 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -1863,7 +1863,7 @@ wrmsr_early_safe_end(void) lidt(&wrmsr_early_safe_orig_efi_idt); gpf_descr = &idt0[IDT_GP]; - memset(gpf_descr, 0, sizeof(*gpf_descr)); + memset_early(gpf_descr, 0, sizeof(*gpf_descr)); } #ifdef KDB