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 1C70B3F12D3; Mon, 17 Aug 2026 13:50:11 +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=1786974618; cv=none; b=nMuylid0HJbhrOtXrAnjIFpyZzCUNFxAEjWUNEeEoF91F5zcNpNI+Vyu/KRKp2C4FhcOv/2siv8GKwXxvEbXObyaLGycgk9NHtM4kwXEnnj+lyEpAmSjAkmFDnZViY4l3IvcN+NbL6NuySTqxJl1aWRrjozSCuD4u/R6+TuR0yc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786974618; c=relaxed/simple; bh=5MF/QRmjxbqjkrFOZ8DGYglSbmuv1BLvOW7pJh85iaM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dSZNfnndIJ9ZmXQh9JP32eJ7c1fEGLrqx7yTEZ73rgoq4xSnzGNBBDBJQFQvaMpXu7kjobUnM5CAVD9G/8wpvtVdFjV0gYFMxbLYUfKvUekTimsLwQaoZqNjKkuLUtMhjCZ01x4Om4SY7R2XlEXD25nD9nIhnM91stjFu2JwuxU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Syd6A++w; 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="Syd6A++w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 176E01F000E9; Mon, 17 Aug 2026 13:50:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1786974611; bh=hA4JItOGb5Kmc6nZHoOAQmnEAQoS+ZcAs6UXhvp8rHw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Syd6A++wDwDxc7JIgUrwk0cJXVyLoFgQo8smoSy+6Bt5FRecIFKiIp8yBk1Cz5ZMc uSNTbj0bMGPXFsgtf+0oy60B3xJP7gpWNi7uVZ3iyVDc880Xzo0fk09CYEID73CwAg AjnAQB0rgCWvrP01Z9NSKA1ojP3x/TUbQSYHFDlE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xu Rao , John Garry , "Martin K. Petersen (Oracle)" Subject: [PATCH 7.1 266/271] scsi: scsi_debug: Negate wrapped memcmp() result Date: Mon, 17 Aug 2026 15:33:11 +0200 Message-ID: <20260817132547.659181900@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260817132536.752504388@linuxfoundation.org> References: <20260817132536.752504388@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 7.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xu Rao commit c4f6916a99cf105c3ff340b6210fcbba3fa66b35 upstream. comp_write_worker() returns true when the compared data matches. memcmp() returns zero for equal data and non-zero for different data, so its result must be negated before it is stored in a bool. The first segment already uses !memcmp(), but the wrapped segment uses memcmp() directly, reversing the match result. Use !memcmp() there as well. Fixes: 38d5c8336e60 ("scsi_debug: add Report supported opcodes+tmfs; Compare and write") Cc: stable@vger.kernel.org Signed-off-by: Xu Rao Reviewed-by: John Garry Link: https://patch.msgid.link/E5AD42E9C0E18633+20260803095328.3445311-1-raoxu@uniontech.com Signed-off-by: Martin K. Petersen (Oracle) Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/scsi_debug.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -4318,8 +4318,8 @@ static bool comp_write_worker(struct sde if (!res) return res; if (rest) - res = memcmp(fsp, arr + ((num - rest) * lb_size), - rest * lb_size); + res = !memcmp(fsp, arr + ((num - rest) * lb_size), + rest * lb_size); if (!res) return res; if (compare_only)