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Wed, 07 Oct 2020 21:33:07 +0000 Received: from gmail.com (unknown [104.132.1.76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0434B2083B; Wed, 7 Oct 2020 21:32:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602106375; bh=/x/sTo/eJjSQ296lRma1jF5McQ8+RG2igB6SGcnoNr8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=WOY3O+TrN+cvDQ/hm3RFovBwbNfMijWaOZqhkdXkTxTk3tjnXhgYbL4P6ngbHbFOy 6cciT4lsiwQl02cBTh93+KLCmNjgJW5N8vvkZyOP3J84CN9/AEtZ86GjpdoG1Z+7M2 e7RsH7vVKWcK4ICsUNhGBRG8ZVzDjKuu3DzHtzdY= Date: Wed, 7 Oct 2020 14:32:53 -0700 From: Eric Biggers To: Jaegeuk Kim Message-ID: <20201007213253.GD1530638@gmail.com> References: <000000000000432c5405b1113296@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <000000000000432c5405b1113296@google.com> X-Headers-End: 1kQH3U-002Uaj-R7 Subject: [f2fs-dev] [f2fs bug] infinite loop in f2fs_get_meta_page_nofail() X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: syzbot+ee250ac8137be41d7b13@syzkaller.appspotmail.com, syzkaller-bugs@googlegroups.com, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net [moved linux-fsdevel to Bcc] On Wed, Oct 07, 2020 at 02:18:19AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: a804ab08 Add linux-next specific files for 20201006 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=17fe30bf900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=26c1b4cc4a62ccb > dashboard link: https://syzkaller.appspot.com/bug?extid=ee250ac8137be41d7b13 > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1336413b900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f7392b900000 > > The issue was bisected to: > > commit eede846af512572b1f30b34f9889d7df64c017d4 > Author: Jaegeuk Kim > Date: Fri Oct 2 21:17:35 2020 +0000 > > f2fs: f2fs_get_meta_page_nofail should not be failed > Jaegeuk, it looks like the loop you added in the above commit doesn't terminate if the requested page is beyond the end of the device. - Eric _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel