From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A353C4167B for ; Fri, 10 Nov 2023 18:08:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235430AbjKJSI1 (ORCPT ); Fri, 10 Nov 2023 13:08:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345501AbjKJSGf (ORCPT ); Fri, 10 Nov 2023 13:06:35 -0500 Received: from mail-pf1-f198.google.com (mail-pf1-f198.google.com [209.85.210.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 61D1A3A23B for ; Fri, 10 Nov 2023 07:22:39 -0800 (PST) Received: by mail-pf1-f198.google.com with SMTP id d2e1a72fcca58-6c337ce11ceso2238410b3a.1 for ; Fri, 10 Nov 2023 07:22:39 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699629759; x=1700234559; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=IPzczgmFbAPnGqoNra/Exmwp4N4poyyFRIcw6m8a/SE=; b=kOKayaDxN+cHwYoJ1vgAyVzE8Sz6dCrDtp0a1mkUKCtK1uLY36nYfbA4S2IdlsUbe0 G7ha+8X/kU5v/GEoyj5Vx1YLz0D5qDnFu1h6xxKu52h+8Rzu3X4oW0whMAxM5BMuhQ02 0TNrD1iaziOiMpHMbDzrI6UrjZxiMD8xF/dMZ+YO1TLh9CG2tQyuo+EnwdUA6eqhs2L9 AVVyRx8U32jDtlvUyo/DW9J1E+9Lglb4AN0KLrUeNiSIx75Tg4IC69jDjow/ZPbAg+I4 eHs1oHc9BaqTySKBN+Qyz8QqGTnkfW2n22wibny7LPFZ/KawumZDXUhS9c2III19rlfR X27g== X-Gm-Message-State: AOJu0YzdCOxkasZ4M0Xe8IkanZQV0XGyjQpdbeQna1pPMtjKR8pDiKDr zWeCgGGFm0rrqy57eorOfM0RafGpLZBUdB6bY8z72U18VDKUyDE= X-Google-Smtp-Source: AGHT+IFYqh2CDJOTP9gjjrkWFS2OqzwrSWw++vCFmz78cuq2DouDS2F3CzL1A74OajqghpbSyU2etHMyB51WGpyzsUMsPRwSmvEn MIME-Version: 1.0 X-Received: by 2002:a05:6a00:bdd:b0:6c0:4f6f:ef83 with SMTP id x29-20020a056a000bdd00b006c04f6fef83mr1285433pfu.6.1699629758867; Fri, 10 Nov 2023 07:22:38 -0800 (PST) Date: Fri, 10 Nov 2023 07:22:38 -0800 In-Reply-To: <000000000000ade4f305fc36868f@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000006f2f80609cde40a@google.com> Subject: Re: [syzbot] Discardable change From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: Discardable change Author: yuran.pereira@hotmail.com #syz test: https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master --- drivers/usb/core/devio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 3beb6a862e80..22ae7babf46b 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -276,12 +276,14 @@ static int usbdev_mmap(struct file *file, struct vm_area_struct *vma) if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(usbm->mem) >> PAGE_SHIFT, size, vma->vm_page_prot) < 0) { + pr_info("==> if* vma_use_count %d\n", usbm->vma_use_count); dec_usb_memory_use_count(usbm, &usbm->vma_use_count); return -EAGAIN; } } else { if (dma_mmap_coherent(hcd->self.sysdev, vma, mem, dma_handle, size)) { + pr_info("==> else* vma_use_count %d\n", usbm->vma_use_count); dec_usb_memory_use_count(usbm, &usbm->vma_use_count); return -EAGAIN; } -- 2.25.1