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 BD6F23A8746; Tue, 16 Jun 2026 16:25:55 +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=1781627156; cv=none; b=aALNv8fxjtKcRerEUzrUhkNbqyfpM6XrBpDYPTTJFNOaEBvBTR/rLu8eeaIaYIj4WQ4Mhpivy5yy24fCkPIRjrx6E8Brxt1Gt3WUB/VsHc7lxsnmuRqIMUYylI0Vl/+GwWcoWMPlofJkRSmyZVhrc4ISPsXLYF0qG9GlXcse2ck= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781627156; c=relaxed/simple; bh=OIzVVvn2hpuvmws6nRCQdr+SgbqNzZyB1Eb7OKIjudM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RB/s26W2OUqOqIGTwoYxjBcsmu7UfcKeS5T/bl1QZIWArFEcvLW6DhhtlRZpmeMgVeutpjbrGNuIYl9OQIxDHuysTqpKBbfD1Jx4rN4d6M4JdDrra9r6raIOJYYrR23iXMv7bN9s7BxSxZ03hWShzIpQ/6WMvtjN/REnXNunOXw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=tgK8s6Bk; 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="tgK8s6Bk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13C041F000E9; Tue, 16 Jun 2026 16:25:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1781627155; bh=QNpDJjmVWtuCqL+SnALRdOAJlCwzuwtk9ezxJyiDyXY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=tgK8s6BkmBae73IFyy89pMoTkmXBOPYwq02wihdqVC5rwL+hNPdmUNJ+KajwJWdwg gIjphlHso4z6SJapb5oCmMC09RjA2ZzXPkDz96rsU6eYbP+A+Bpq8i0TPOv7lKwhQH eaAK0M0inna5C3cmHFuigsSpsaJBWUz/Wqfa5WPg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Andrzej Kacprowski , Karol Wachowski Subject: [PATCH 6.12 127/261] accel/ivpu: Fix signed integer truncation in IPC receive Date: Tue, 16 Jun 2026 20:29:25 +0530 Message-ID: <20260616145050.971215254@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260616145044.869532709@linuxfoundation.org> References: <20260616145044.869532709@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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrzej Kacprowski commit d9faef564438d1e4579c692c046603e7ada7bdf4 upstream. Fix potential buffer overflow where firmware-supplied data_size is cast to signed int before being used in min_t(). Large unsigned values (>= 0x80000000) become negative, causing unsigned wraparound and oversized memcpy operations that can overflow the stack buffer. Change min_t(int, ...) to min() as both values are unsigned and can be handled by min() without explicit cast. Fixes: 3b434a3445ff ("accel/ivpu: Use threaded IRQ to handle JOB done messages") Cc: stable@vger.kernel.org # v6.12+ Signed-off-by: Andrzej Kacprowski Reviewed-by: Karol Wachowski Signed-off-by: Karol Wachowski Link: https://patch.msgid.link/20260601161643.229342-1-andrzej.kacprowski@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/accel/ivpu/ivpu_ipc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/accel/ivpu/ivpu_ipc.c +++ b/drivers/accel/ivpu/ivpu_ipc.c @@ -275,7 +275,7 @@ int ivpu_ipc_receive(struct ivpu_device if (ipc_buf) memcpy(ipc_buf, rx_msg->ipc_hdr, sizeof(*ipc_buf)); if (rx_msg->jsm_msg) { - u32 size = min_t(int, rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); + u32 size = min(rx_msg->ipc_hdr->data_size, sizeof(*jsm_msg)); if (rx_msg->jsm_msg->result != VPU_JSM_STATUS_SUCCESS) { ivpu_dbg(vdev, IPC, "IPC resp result error: %d\n", rx_msg->jsm_msg->result);