From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E6513ACEFB; Sat, 12 Sep 2026 18:24:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789237486; cv=none; b=Bql0YuJo7XcKkA5wNkDIWUXvEQxH48MDrAd8FPll0cpOrtQcCbmVSEGb1MIVwv5llZpYHf+Fcyas6JoUIpyUxE5w6rxvZ16uSX+fCMRXik3aN9wE4lgS5BAwfUxrNDOwR1ItdAqEEwERoq0AnBqumNCZvCcY5xBwCsNZyXBNNbc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789237486; c=relaxed/simple; bh=yTOHDSDeBR4a5mp62dfiBW6JeUuNsZqWL3IxadLXBv8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Eqn+iuNUGAIzZJc9hzH24ve21CvRK2EMWEho0KO9NrqugtvpYrwRUJuwVqNw2lLrhnESh/OaN/1opYDH1CU4p3zlAk0TpKyUVt/8owJ2v9uS/97IXMwkKD2yENYkF28uh3wtsrb7/O/MGBDwWgVj25dD6OHmtreNkTRvKXiNJ60= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=inuK3UkN; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="inuK3UkN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 062DD1F000FF; Sat, 12 Sep 2026 18:24:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789237484; bh=gaGeBGAx0h97pboAg4gij8x/2NMluMTFiBgGYJqJoJI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=inuK3UkN4ftdM99slMjJKDjNtXtBLirM2b31nGGafo6UTo/WSn2N30rFs0O8PZFUz v+aKdDHJXEOyqKUaWwBCtORwqIR5dlyuz7hat/H05K4myUzJYesIskvSXKNktgCnje zjeYFqsLEx/Peh011a9HnPtCi2FuEJurtc2Jca3g= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pei Xiao , Helge Deller Subject: [PATCH 5.15 269/935] parisc: eisa: Fix infinite loop when parsing invalid IRQ value Date: Sat, 12 Sep 2026 08:54:59 +0200 Message-ID: <20260912065532.991208161@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pei Xiao commit 8b585431a16cfb9d8f2955a9fa0787ce3dceb3c2 upstream. When an invalid value is passed via the "eisa_irq_edge=" kernel command line parameter (e.g. "eisa_irq_edge=16,5"), eisa_irq_setup() prints an error message and continues without advancing the current position. As a result the same invalid value is parsed again and again, causing an infinite loop while the kernel boots. Advance to the next comma-separated entry, or stop parsing when there is no next entry, before continuing so that the remaining entries are processed normally. Signed-off-by: Pei Xiao Cc: stable@vger.kernel.org Signed-off-by: Helge Deller Signed-off-by: Greg Kroah-Hartman --- drivers/parisc/eisa.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/parisc/eisa.c +++ b/drivers/parisc/eisa.c @@ -441,6 +441,11 @@ static int __init eisa_irq_setup(char *s val = (int) simple_strtoul(cur, &pe, 0); if (val > 15 || val < 0) { printk(KERN_ERR "eisa: EISA irq value are 0-15\n"); + cur = strchr(cur, ','); + if (cur) + cur++; + else + break; continue; } if (val == 2) {