From nobody Wed Sep 23 12:47:46 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 4hqcFH0rs0z6t12j for ; Wed, 23 Sep 2026 12:47:47 +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 "YR2" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4hqcFG6dfRz4P1x for ; Wed, 23 Sep 2026 12:47:46 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1790167666; 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=sZeompahE52I/tTa7CQ9dYxq/Wg7o1nNEbwAcRyXyqI=; b=HphHUPWgPLutfQ4idzaIgi8vxWtb4K9ApOEXbBIieM7hUhndS22H09C3zUU7gz4e6BhtP3 TRugTrBxd7iKXyupuCn3UBwdgh9izcbaVj3571YLYVREqddw0FjT0oc2v/YeMvOXmxTY1U 3QZrpy1vNPPLiobnDRFz0l4WzHAI61daD58c+w9x7IuO9Snmc5UnzrJuBOivlo+ZlZrRaG 73UN6XWaJLPYhExc9iyV0U3+VzkrNR09KXoYMwISt6Y1AVyuOh7/YTxBt6GzKbHKXxOpV6 kRJQ/XeZ+Vl3zrwtEQXTf9vgZPTC3fFFu/1/8VJQT9MnCUNVwLty9HeVyjJhkA== ARC-Seal: i=1; a=rsa-sha256; d=freebsd.org; s=dkim; cv=none; t=1790167666; b=vMF7x4aE9O+eBjEXyvwJ+13w+N0FVXR8MyruoItU7C0n0qkVkJ9RTH5QcLyEppBCuteo3o MR7ne0tf3TVcnqFErhv7SB9q2il+e/jAqljHfMZiSZSPoT9Jtttkgj9V5FA6hl959z3HAk jKdxC2hPEQoeqAMkxb8zgBCoFA+AHjmMNP5pk/tz/niC8iy7wYIrW81xe8dW7Tp4ebRKih i1W0F8M83MKLBNjDcvp4U6coPzeQdNBfcVLd7dPE8m2Uay4hr3eGbCGz9MP620d/hsqOP2 XCK0LQTezLCtIPe0NIp89KaBCkh2CJ+96onzUvywj/XM5NGRn0WCpCN/VcJKig== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1790167666; 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=sZeompahE52I/tTa7CQ9dYxq/Wg7o1nNEbwAcRyXyqI=; b=iG8yrlwkctnCN8LgiW3SMjZQ918ki3NeGgGEp3/J7+Obw6nUZ4BSWitzCF1Ig45j6qH7SJ 1cmjOKNW4YRN77qF1XKjAto7oHlRnTydW7ZO09Lj25CtaY2j5OnQL/UetHlvtMFm1kzqG/ kwa2Otrrcwq4ANcWqEfiVwqlukGOkiteNv2b0oF+Hlov5I2uBw0LHuR5478CEcQwiVtwnP JCHFYNyjhxKdasaaWYX+GBo85mGZxYr6JFAPOZpJDZRNhNZS025dkk3KHu/2ZTfa/02ly/ XHtoWRF6NfXAzr7irZHukUE36R+0NfXnSM6Y3m6ITW+pdOY/DUoWg4PWkSJqSQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4hqcFG5kS6ztwZ for ; Wed, 23 Sep 2026 12:47:46 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 19f72 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Wed, 23 Sep 2026 12:47:46 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org From: Alexander Leidinger Subject: git: 3897678132e7 - main - vfs_register: prevent kernel crash 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 List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: netchild X-Git-Repository: src X-Git-Refname: refs/heads/main X-Git-Reftype: branch X-Git-Commit: 3897678132e71df70dbb18bf8e2f19124beee5d7 Auto-Submitted: auto-generated Date: Wed, 23 Sep 2026 12:47:46 +0000 Message-Id: <6ab3ca72.19f72.17fad794@gitrepo.freebsd.org> The branch main has been updated by netchild: URL: https://cgit.FreeBSD.org/src/commit/?id=3897678132e71df70dbb18bf8e2f19124beee5d7 commit 3897678132e71df70dbb18bf8e2f19124beee5d7 Author: Alexander Leidinger AuthorDate: 2026-09-23 12:30:42 +0000 Commit: Alexander Leidinger CommitDate: 2026-09-23 12:47:42 +0000 vfs_register: prevent kernel crash vfs_register hashes the filesystem name and uses it for sysctl oids. A filesystem name which hashes to 0 crashes in sysctl_register_oid(). Map 0 to 1 to prevent the kernel crash. This can be tested with "udf2" as the filesystem name. MFC after: 1 month MFC to: stable/15 stable/14 Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D59839 --- sys/kern/vfs_init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/kern/vfs_init.c b/sys/kern/vfs_init.c index ceda770cb714..b4817f172edd 100644 --- a/sys/kern/vfs_init.c +++ b/sys/kern/vfs_init.c @@ -427,6 +427,8 @@ vfs_register(struct vfsconf *vfc) */ hashval = fnv_32_str(vfc->vfc_name, FNV1_32_INIT); hashval &= 0xff; + if (hashval == 0) + hashval = 1; secondpass = 0; do { /* Look for and fix any collision. */