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[23.128.96.35]) by mx.google.com with ESMTPS id e4-20020a656884000000b005be0ca9ca31si763199pgt.294.2023.11.29.23.56.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Nov 2023 23:56:10 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) client-ip=23.128.96.35; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by groat.vger.email (Postfix) with ESMTP id 8AF9D8058A2D; Wed, 29 Nov 2023 23:56:07 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at groat.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234985AbjK3Hzw (ORCPT + 99 others); Thu, 30 Nov 2023 02:55:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231806AbjK3Hzu (ORCPT ); Thu, 30 Nov 2023 02:55:50 -0500 Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E61110F9 for ; Wed, 29 Nov 2023 23:55:52 -0800 (PST) Received: by mail-pl1-f199.google.com with SMTP id d9443c01a7336-1cff35371aeso6973385ad.0 for ; Wed, 29 Nov 2023 23:55:52 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701330952; x=1701935752; 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=dA+vPCLU/f6Yj1BbW2YhSxBQTt1cBuwejD5YAdXVdl4=; b=tDkYQFiu2SQTUSnRV8I/K4I2//jivGZ1BeyvSdl34jZbTgz+THK0kEBvrWWfdcSh3k m1CvyNe/UExnHDxbhNl2UyTlJQ6G2N/EF4yeHir7FQw/K07H3uHsAHuHGN5zikUH2h/4 x1DQCyUqnOD6iD7oAgh6Qy6VutoO/YpNkkw4Sn2qRZsYY2mO3VMUilFjoQve3mty80Il m9KnMvJBuqjon4IKYYJ4YTdNpuGPwxD7Kl6YpYzb3WXWWsE8PGEKKR6calMkIMhjxAsY HbjwSEWwrc9Rlw+r2Jx7AS11rZkilk1XCKc/jHykjc/1zmgtXLX49DaJU2oefi9ahms5 0LxQ== X-Gm-Message-State: AOJu0YzFxcWNrttKocn5GHgDd4ALsGH17Prcx3TIX6905kK4bs3pxp06 p1N+y/rtf+ZOxP83Qx21zSQqijAQYlgDcuMmzTaKM3ajwkZ4LFA= MIME-Version: 1.0 X-Received: by 2002:a17:902:6944:b0:1cf:6969:598 with SMTP id k4-20020a170902694400b001cf69690598mr4392609plt.7.1701330951829; Wed, 29 Nov 2023 23:55:51 -0800 (PST) Date: Wed, 29 Nov 2023 23:55:51 -0800 In-Reply-To: <000000000000db858c05f06f30b0@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000078063060b59fb38@google.com> Subject: Re: [syzbot] task hung in exfat_write_inode From: syzbot To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-0.4 required=5.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Wed, 29 Nov 2023 23:56:07 -0800 (PST) For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org. *** Subject: task hung in exfat_write_inode Author: lizhi.xu@windriver.com #syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f9ff5644bcc0 diff --git a/fs/exfat/file.c b/fs/exfat/file.c index bfdfafe00993..a3ace4fc555c 100644 --- a/fs/exfat/file.c +++ b/fs/exfat/file.c @@ -116,6 +116,7 @@ int __exfat_truncate(struct inode *inode) exfat_chain_set(&clu, ei->start_clu, num_clusters_phys, ei->flags); + mutex_unlock(&sbi->s_lock); if (i_size_read(inode) > 0) { /* * Truncate FAT chain num_clusters after the first cluster @@ -134,8 +135,10 @@ int __exfat_truncate(struct inode *inode) } else { while (num_clusters > 0) { last_clu = clu.dir; + mutex_lock(&sbi->s_lock); if (exfat_get_next_cluster(sb, &(clu.dir))) return -EIO; + mutex_unlock(&sbi->s_lock); num_clusters--; clu.size--; @@ -160,6 +163,7 @@ int __exfat_truncate(struct inode *inode) * __exfat_write_inode() is called for directory entry, bitmap * and FAT to be written in a same writeback. */ + mutex_lock(&sbi->s_lock); if (__exfat_write_inode(inode, inode_needs_sync(inode))) return -EIO;