From nobody Fri Feb 13 15:43:25 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 4fCGfV2Lgjz6S1ZH for ; Fri, 13 Feb 2026 15:43:30 +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 "R13" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4fCGfV1wQbz3fK1 for ; Fri, 13 Feb 2026 15:43:30 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1770997410; 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=Bgdz9iFc/e2LpW8nI1ZQkwtCoHk98GqbJv2XJfYK5HUAVD7H3c81aPc7wUimmpVT8PdieW mzrbFgoPtjoApp3mCxoljy2T1n1Nb9LIRlNmY+jl6C5HHP/OwX2GlwelfwK2LZXsafN+f1 gxYz96vBFEk1tvo1fEEpAKEMl2LoK7WIQM5hbuoUNlPORmrvmpraVALlHjMqXXLg89j3kj k81LFbu6nyHZ5eQi0mP8Ur2TJ2+cweKOHp8P6sBEtlLoO52yeY11HgBJ+5kYYgazJZUM9h N45viFQVNJYgUycsSJrsV2rRvAHMWDnpnqH+mAXXAW0WwOXb9wp663RIvq0XZg== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1770997410; a=rsa-sha256; cv=none; b=MjYAPMelpaRroN1A/isrMTgw9+dSlF23+0EzuzASNzTyNU4/gPr3SI/e/aa1EN4Uf1DxCW JfVzk1KWwrFStDjleFLGcFaTQJE1MEX5vwRlUh7JWu3mbj2ZWCArwA94W2DrHCG5+rSmGI NnIlgGqTTgIQnbs2SJQhFKsStXg77H6hWEqvh0bPC4b4xpOgFyhvHeqU/E4yofQzgM2ueC Jsq+KfKjFb726pbejG3A3hDyIwVO0L8k9TvPzc7iLwAZYWdqf9j9owZMCfBn63k+8Wa4Za l+z579sPgfH+geJWI9fVUiMgNFXEhVK79FpeoGm88UAQKt5yFbFOoshTi2SOAQ== 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=1770997410; 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=Ugw0uoEPLj92LJym4nYmTQBrXQIk8clYwvltepWIVjdofFQzbnpDgYL1ti9JydeA2oeiIV SFR4p7FuGD3laHrpGjvIQXoMbxVJEpPA7jSpdNXT1kOPokUeMize1FmRZw6ZBVlPxV/HbL YpBdIdw/pwOdXIoZ/Mmua57QSs5iB9JwLbNrqcrn+IP9kKKHY3yQhUGbMyZ5/SpWPez1PA 72v5R+HSmaDbj7njPGQKdCQT6EG2DPxRD+CCV/R3ZMR5V1NlboXVOSsEjH2NYvpOAP8QpF sz9ts+zck8QnsOfiv6ArYjUgZjP4Xa+PkY/qcRB/M4aSYDaZ52FqDiEiM1HbEw== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4fCGfV1JbxzC09 for ; Fri, 13 Feb 2026 15:43:30 +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 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: 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); +} + /* -------------------------------------------------------------------------- */ /*