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From devnull@lkml.org Sat May 18 20:08:26 2024 >From mailfetcher Wed Feb 17 11:37:31 2021 Envelope-to: lkml@grols.ch Delivery-date: Tue, 16 Feb 2021 17:19:15 +0100 Received: from stout.grols.ch [195.201.141.146] by 72459556e3a9 with IMAP (fetchmail-6.3.26) for (single-drop); Wed, 17 Feb 2021 11:37:31 +0100 (CET) Received: from vger.kernel.org ([23.128.96.18]) by stout.grols.ch with esmtp (Exim 4.89) (envelope-from ) id 1lC34E-0002AR-OR for lkml@grols.ch; Tue, 16 Feb 2021 17:19:15 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229722AbhBPQS5 convert rfc822-to-8bit (ORCPT ); Tue, 16 Feb 2021 11:18:57 -0500 Received: from mail-io1-f72.google.com ([209.85.166.72]:34497 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229699AbhBPQS4 (ORCPT ); Tue, 16 Feb 2021 11:18 Received: by mail-io1-f72.google.com with SMTP id c3so9549348ioa.1 for ; Tue, 16 Feb 2021 08:18:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-transfer-encoding; bh=a8hUNa4Ix/LDbsilB9jQGmZUOKeE8lSIMFKanIi/0k0=; b=BaQhDCW3wk X-Gm-Message-State: AOAM531Lu69xfxJ8a+D1W5o4Vc3pXEi7Harw2gv5HY3ErTO2EArPVeoY 7Mbyvy/QT85nB13Y13LX9m1EO/wTg2ntJhNuwUFr9eUvVk+/ X-Google-Smtp-Source: ABdhPJyYUD24vdN/+Gdjj9LCM+0IBAtIJBJXzjEE0b5B1N/KxVyXSh8tqmYi1yOjckM2LQKUansmMJCWdsuqQj+4V74azkZdqL1E Mime-Version: 1.0 X-Received: by 2002:a05:6602:24cb:: with SMTP id h11mr17729134ioe.79.1613492295537; Tue, 16 Feb 2021 08:18:15 -0800 (PST) Date: Tue, 16 Feb 2021 08:18:15 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-Id: <0000000000001fb73f05bb767334@google.com> Subject: WARNING in iov_iter_revert (2) From: syzbot To: gregkh@linuxfoundation.org, jirislaby@kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Precedence: bulk List-Id: X-Mailing-List: linux-kernel@vger.kernel.org Received-SPF: pass client-ip=23.128.96.18; envelope-from=linux-kernel-owner@vger.kernel.org; helo=vger.kernel.org X-Spam-Score: -1.7 X-Spam-Score-Bar: - X-Spam-Action: no action X-Spam-Report: Action: no action Symbol: ARC_NA(0.00) Symbol: CTE_CASE(0.50) Symbol: DMARC_POLICY_SOFTFAIL(0.10) Symbol: BAYES_HAM(-2.99) Symbol: FROM_HAS_DN(0.00) Symbol: RCPT_COUNT_THREE(0.00) Symbol: R_SPF_ALLOW(-0.20) Symbol: PRECEDENCE_BULK(0.00) Symbol: MIME_GOOD Hello, syzbot found the following issue on: HEAD commit: dcc0b490 Merge tag 'powerpc-5.11-8' of git://git.kernel.or.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=162f2d02d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=1106b4b91e8dfab8 dashboard link: https://syzkaller.appspot.com/bug?extid=3d2c27c2b7dc2a94814d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1346ac60d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=123eae4cd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3d2c27c2b7dc2a94814d@syzkaller.appspotmail.com [U]  ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8461 at lib/iov_iter.c:1090 iov_iter_revert+0x2e3/0x8e0 lib/iov_iter.c:1090 Modules linked in: CPU: 1 PID: 8461 Comm: syz-executor778 Not tainted 5.11.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:iov_iter_revert+0x2e3/0x8e0 lib/iov_iter.c:1090 Code: 05 00 00 45 8b 74 24 08 48 89 de 4c 89 6d 20 49 83 c5 01 4c 89 f7 e8 bc eb b4 fd 49 39 de 72 ba e9 2c ff ff ff e8 9d e5 b4 fd <0f> 0b e9 30 ff ff ff e8 91 e5 b4 fd 48 8d 7d 18 48 b8 00 00 00 00 RSP: 0018:ffffc9000168fc30 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000 RDX: ffff88801b6c1bc0 RSI: ffffffff83bdef03 RDI: 0000000000000003 RBP: ffffc9000168fd68 R08: 000000007ffff000 R09: ffffffff8f86683f R10: ffffffff83bdec5e R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: ffffc9000168fd68 R15: ffff88801b6c1bc0 FS: 00000000016f5300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d4c03d0d8 CR3: 0000000013adc000 CR4: 0000000000350ef0 Call Trace: do_tty_write drivers/tty/tty_io.c:967 [inline] file_tty_write.constprop.0+0x55f/0x8f0 drivers/tty/tty_io.c:1048 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write+0x426/0x650 fs/read_write.c:518 vfs_write+0x791/0xa30 fs/read_write.c:605 ksys_write+0x12d/0x250 fs/read_write.c:658 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x43ee99 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffc3cb0628 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000402e80 R08: 0000000000400488 R09: 0000000000400488 R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f10 R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches