From nobody Wed Mar 25 02:25:41 2026 X-Original-To: dev-commits-src-main@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 4fgW3b0N0tz6WYgH for ; Wed, 25 Mar 2026 02:25:47 +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 4fgW3Z4X8bz3Z4B for ; Wed, 25 Mar 2026 02:25:46 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1774405546; 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=unvw2i8k72tQLfQuB0jsXzpF9WBTedYdLJ89/6+IawA=; b=JYJ9RZIRj6NEnNArSysykYd3Y8U0xkFF6FcpMEZviwV34kEb+bYlgTZkR4s/YiIChFsV/P yTetpuMU5fJGEh64mxoJnyLZuHki620wVba0crUuySnw49hZqwFVh2jqp1YuJ4La+A4lU6 yVUWDSuAZek4ddSBDC9TNr1QuNs3BT8oZaJcxt56S809WX4IRy6wDgvNF+YadTzusgrl1S UhqzrdHtp5ra/L34OrxUsnRiXJfigEA+HG8tuOhrXCk7QGs4B7q4ZJR08fiiliKh9f9REI h7Hzp+ML0EF+9VD9CndkMGhRa7muXeqWlYwtbK1n/f9tANmq7WrX8DfG7T4QnQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1774405546; a=rsa-sha256; cv=none; b=YAiqo/eWRF9FnZeNwVIW7pcliRr57VR1yHVH48tnIbyZEwTNi/OmeJ9gkvsSGT5m5JSNT3 MOtGGA9ukoIGmn9tuma5c2NNPdN7aCNzEantgOqH6ZvsfD/G9AZQtfWUjLsENLHa80UMAs UEJBx1sHf4H+GrzXqXjOvEtzsVMXlgdCUlp5++2NNOJkQn/KYAdqW69jbfrZ63GlTzyd8Y uU0nB9sLsg4IsDJmdTeHhzwlm7DTp1B8r6I8vBhauSMrwZshnn0O7ZBRKBn3PbDBp2N7Z3 xshKpmLkzVgTIQG/SIorDRR4tJQOllHYCIOR/uP0e+ac5bfxqZVs3ifs7w3vKQ== 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=1774405546; 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=unvw2i8k72tQLfQuB0jsXzpF9WBTedYdLJ89/6+IawA=; b=bPD4UeqxHsU/5trUrZ+EWw71ilFh5uqdT+zzK5sO+8EozI7LsJ1eoB6DvsVv6a37CykVFF D5SQOXGNWf2xssWfzqkOLASOIVauot0VVgGpSFGRf6JshG5qFQMUGgM8Q+fVOIU8A0tQk0 KALUdOK6F/bp446Qw0TizTjoitlz5JgywhExO+QMOlbgqSwwq5RARatKulp1ZIqQyd8pKx tjqX8dFeFnHnPMNz6cKzFIxwLjMZQmwUvUg31AZB3ex/tfmlwuVxYx5MmNGhs6lT4zNjkd 5+OrDpRr1XFvyD3ZGxqc4jJjRtqfythJkQHGHSWbRHRaGkYTiBePhKXzHctyQw== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4fgW3Z40krzmJS for ; Wed, 25 Mar 2026 02:25:46 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 207ab by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Wed, 25 Mar 2026 02:25:41 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Cc: Kristofer Peterson From: Kyle Evans Subject: git: 615f1b9eb17c - main - kern/amd64/machdep: Replace memset in wrmsr_early_safe_end List-Id: Commit messages for the main branch of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-main List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-main@freebsd.org Sender: owner-dev-commits-src-main@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/main X-Git-Reftype: branch X-Git-Commit: 615f1b9eb17c921bbcb0cce2b9ad61910361325b Auto-Submitted: auto-generated Date: Wed, 25 Mar 2026 02:25:41 +0000 Message-Id: <69c347a5.207ab.65f029f@gitrepo.freebsd.org> The branch main has been updated by kevans: URL: https://cgit.FreeBSD.org/src/commit/?id=615f1b9eb17c921bbcb0cce2b9ad61910361325b commit 615f1b9eb17c921bbcb0cce2b9ad61910361325b Author: Kristofer Peterson AuthorDate: 2026-03-09 19:40:34 +0000 Commit: Kyle Evans CommitDate: 2026-03-25 02:24:17 +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 Pull-Request: https://github.com/freebsd/freebsd-src/pull/2069 --- 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 e9bb27a54dfb..78199cb2ac03 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c @@ -1850,7 +1850,7 @@ 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