From nobody Fri Feb 13 15:43:25 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 4fCGfP4XQjz6S1vD for ; Fri, 13 Feb 2026 15:43:25 +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 "R13" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fCGfP2S9Mz3dyh for ; Fri, 13 Feb 2026 15:43:25 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1770997405; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=t7GlH3hKIEUCEiyBs6qmk6lvm6obFQ9tTye4xiAIrl8=; b=XdwP4I85FVTG0cXkwywonGrvGdrPnMQV60X+ijjNk/xcmguJY/MD3phKMpuKQPPvdkpo8l JbSjb33lsa1vqHw0QZdgrsQLCAicPxrtFP0vQvOv9LUMg53adpevfwFRsxXNRm/nqivRkn AW+CVGpxDJuHWgJ7LmVlbOspJYjAxQPVDh8v5UoITqFLoBX85m+DGl2kkEx52FNqnDGra0 /2DvW0l3Tcj9vsb+moeiWkEyIcwQmkmyKDXiOl+XiLZmL/nhdODXRedAbAZcPbzHDM+0OZ QpVWs4LGW9OjFZJQWn8HNCBt6Efx5fTgi12FzFNwSaOPOOaRmGv6dC68ZjA6MQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1770997405; a=rsa-sha256; cv=none; b=W6se3YfOuxv2qegY2MMRj0vY9wPbpUjVm9+ocs1jdpzzb+g8Qjhryq96Cu+MPNQo2jYk8Z CYoC1jLhqxkF4ABvWo8rMln5Wdylj4ZJm4p8WD3Jy7B/u2sqUHQpD9DzrejehcMI2WyeuS UxhaPmW2xiPnjneDLObjnekqFn9dm58/v629Y+BYy/0aV4HMXH7A/CAI+J2LPCStqZJd1d b9qSVJalvEPiHh8DEWcJ6v4TsnPHJFm2RQym/NyRfNqqIss+H6DNtnTYYiWjA8Ua/mOlYO 2pwQbn5IYK6Rta2OL65GA/1dF5kYS3lpyIe5AgpTUl55/9Y5piM7KtCLdBNIjQ== 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=1770997405; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=t7GlH3hKIEUCEiyBs6qmk6lvm6obFQ9tTye4xiAIrl8=; b=IZjprAgBcWln7wU6SDTmcSAPJYNXBzKF83FSMe6xJr/N4t3nLtOaNh8FUjEbDo2IctxRez TDhGPZ/Fd3tM8X4OyyJ9kO13EPgZRLLbEX7H0Dj+LXe7Ex9DtzYKCiqw9RQFUDQyMQcGu6 m4beKwuDoRuaVRfCgLfWg1pFniaC5ONuZ+o8+SLotDr0OOldK5X3C9WA9z8kKiQr/W35F+ JZvLMk/1rHK+go3mrLhebD2zj4XwttEgPlorFHC6mByedqL79W5FVmZ5t7olbGWTVENq7/ kh+xFJMjN5sblNg1nxYM9Ckz5bEDLragfXKTQpj7EDxv+JrHJOkzlVj+N5SBwg== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4fCGfP1wCXzCVP for ; Fri, 13 Feb 2026 15:43:25 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 1f058 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Fri, 13 Feb 2026 15:43:25 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Mark Johnston Subject: git: bf149f2e88cb - main - kmsan: Implement __msan_test_shadow() 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: markj X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: bf149f2e88cb3836e02ddabd9944eb58650a72ae Auto-Submitted: auto-generated Date: Fri, 13 Feb 2026 15:43:25 +0000 Message-Id: <698f469d.1f058.9562ea7@gitrepo.freebsd.org> The branch main has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=bf149f2e88cb3836e02ddabd9944eb58650a72ae commit bf149f2e88cb3836e02ddabd9944eb58650a72ae Author: Mark Johnston AuthorDate: 2026-02-13 15:42:19 +0000 Commit: Mark Johnston CommitDate: 2026-02-13 15:42:19 +0000 kmsan: Implement __msan_test_shadow() This is needed when building OpenZFS with KMSAN enabled, as the bundled zstd uses it. MFC after: 1 week --- sys/kern/subr_msan.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/sys/kern/subr_msan.c b/sys/kern/subr_msan.c index 883dbd2b7604..dd69375f4ed1 100644 --- a/sys/kern/subr_msan.c +++ b/sys/kern/subr_msan.c @@ -662,6 +662,7 @@ void __msan_poison_alloca(const void *, uint64_t, const char *); void __msan_unpoison_alloca(const void *, uint64_t); void __msan_warning(msan_orig_t); msan_tls_t *__msan_get_context_state(void); +intptr_t __msan_test_shadow(const void *, size_t); void __msan_instrument_asm_store(const void *addr, size_t size) @@ -726,6 +727,23 @@ __msan_get_context_state(void) return (&mtd->tls[mtd->ctx]); } +intptr_t +__msan_test_shadow(const void *addr, size_t len) +{ + uint8_t *shad; + + if (__predict_false(!kmsan_enabled)) + return (-1); + if (__predict_false(kmsan_md_unsupported((vm_offset_t)addr))) + return (-1); + + shad = (uint8_t *)kmsan_md_addr_to_shad((vm_offset_t)addr); + for (size_t i = 0; i < len; i++) + if (shad[i] != 0) + return (i); + return (-1); +} + /* -------------------------------------------------------------------------- */ /*