From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 17A2A17E4; Fri, 7 Feb 2025 00:54:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738889646; cv=none; b=JHd/zrRdf8mqoJFGHAt08Xv+kXq7i+RXY5fIqo4DHb4B3Sm4ud6oUDyq/3CpcgDFokmgn3BAVbsxY9P9+f6TtkvX2jqxHJtroqmvHNachM2tGlcHl1tfdOqFS8r8//tJ3mARGuZ2gCy4h7EkKTqY+HodhbO8hBqXwd8I2+c4Pbc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738889646; c=relaxed/simple; bh=ZKlTFKBvV5jUD9tVHqZ6N0mpAeuGrS5gLLeh5evbldI=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=IDRMyGBHSCz0nJ4C1UuaIEsYNCJW20pYa57TyETpbxxF05g3K7KnqFulxAK5Avz08+cqb3VrXguxoWlQsssa6l5EpZRm7i85/70R2/aeDJ/NMQ62osPT/+xF7Dapmn8Eu4rJvJdYSpqh+eZcDklVcPVNbTARdkwKsL2kHp4hdjo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=UvAVLyV/; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="UvAVLyV/" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B05EC4CEDD; Fri, 7 Feb 2025 00:54:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1738889645; bh=ZKlTFKBvV5jUD9tVHqZ6N0mpAeuGrS5gLLeh5evbldI=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=UvAVLyV/r5UuNhnPza1lTCInH+QqEjrwZcD6aIE4c2ycWO6NJAvj9ouCEYIi6ojcR IgraYoOmZ+jl9Q0iQqy232Ho9KPur2oUom5G5BbpfSMBn0ajLt68yiufd0VHqxE/kF t7+ViKF+03GiD8bweqOUnWlIKNEQEqA8m8CveNJ4= Date: Thu, 6 Feb 2025 16:54:04 -0800 From: Andrew Morton To: syzbot Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, linux-fsdevel@vger.kernel.org, Jens Axboe , Amir Goldstein Subject: Re: [syzbot] [mm?] WARNING in fsnotify_file_area_perm Message-Id: <20250206165404.495fd127b4dc32a62574841a@linux-foundation.org> In-Reply-To: <67a487f7.050a0220.19061f.05fc.GAE@google.com> References: <67a487f7.050a0220.19061f.05fc.GAE@google.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Thanks. Let me cc linux-fsdevel and a few others who might help with this. On Thu, 06 Feb 2025 01:59:19 -0800 syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 69e858e0b8b2 Merge tag 'uml-for-linus-6.14-rc1' of git://g.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=135c1724580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d033b14aeef39158 > dashboard link: https://syzkaller.appspot.com/bug?extid=7229071b47908b19d5b7 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-69e858e0.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/a53b888c1f3f/vmlinux-69e858e0.xz > kernel image: https://storage.googleapis.com/syzbot-assets/6b5e17edafc0/bzImage-69e858e0.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+7229071b47908b19d5b7@syzkaller.appspotmail.com > > loop0: detected capacity change from 0 to 32768 > XFS: ikeep mount option is deprecated. > XFS (loop0): Mounting V5 Filesystem a2f82aab-77f8-4286-afd4-a8f747a74bab > XFS (loop0): Ending clean mount > XFS (loop0): Quotacheck needed: Please wait. > XFS (loop0): Quotacheck: Done. > ------------[ cut here ]------------ > WARNING: CPU: 0 PID: 5321 at ./include/linux/fsnotify.h:145 fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145 > Modules linked in: > CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0 > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > RIP: 0010:fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145 > Code: c3 cc cc cc cc e8 fb 8f c6 ff 49 83 ec 80 4c 89 e7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 01 9f 00 00 e8 dc 8f c6 ff 90 <0f> 0b 90 e9 0a ff ff ff 48 c7 c1 10 73 1b 90 80 e1 07 80 c1 03 38 > RSP: 0018:ffffc9000d416320 EFLAGS: 00010283 > RAX: ffffffff81f8dce4 RBX: 0000000000000001 RCX: 0000000000100000 > RDX: ffffc9000e5c2000 RSI: 00000000000008fa RDI: 00000000000008fb > RBP: 0000000000008000 R08: ffffffff81f8dbdc R09: 1ffff110087dca2e > R10: dffffc0000000000 R11: ffffed10087dca2f R12: ffff888033d4b1c0 > R13: 0000000000000010 R14: dffffc0000000000 R15: ffffc9000d416460 > FS: 00007f5bca7346c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000020000100 CR3: 0000000033fd2000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > filemap_fault+0x14a9/0x16c0 mm/filemap.c:3509 > __do_fault+0x135/0x390 mm/memory.c:4977 > do_read_fault mm/memory.c:5392 [inline] > do_fault mm/memory.c:5526 [inline] > do_pte_missing mm/memory.c:4047 [inline] > handle_pte_fault mm/memory.c:5889 [inline] > __handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6032 > handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6201 > faultin_page mm/gup.c:1196 [inline] > __get_user_pages+0x1a92/0x4140 mm/gup.c:1491 > __get_user_pages_locked mm/gup.c:1757 [inline] > __gup_longterm_locked+0xe64/0x17f0 mm/gup.c:2529 > gup_fast_fallback+0x2266/0x29c0 mm/gup.c:3430 > pin_user_pages_fast+0xcc/0x160 mm/gup.c:3536 > iov_iter_extract_user_pages lib/iov_iter.c:1844 [inline] > iov_iter_extract_pages+0x3bb/0x5c0 lib/iov_iter.c:1907 > __bio_iov_iter_get_pages block/bio.c:1181 [inline] > bio_iov_iter_get_pages+0x4f1/0x1460 block/bio.c:1263 > iomap_dio_bio_iter+0xc9c/0x1740 fs/iomap/direct-io.c:406 > __iomap_dio_rw+0x13b7/0x25b0 fs/iomap/direct-io.c:703 > iomap_dio_rw+0x46/0xa0 fs/iomap/direct-io.c:792 > xfs_file_dio_write_unaligned+0x2ef/0x6f0 fs/xfs/xfs_file.c:692 > xfs_file_dio_write fs/xfs/xfs_file.c:725 [inline] > xfs_file_write_iter+0x5c6/0x720 fs/xfs/xfs_file.c:876 > do_iter_readv_writev+0x71a/0x9d0 > vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 > do_pwritev fs/read_write.c:1146 [inline] > __do_sys_pwritev2 fs/read_write.c:1204 [inline] > __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f5bc998cda9 > Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007f5bca734038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 > RAX: ffffffffffffffda RBX: 00007f5bc9ba5fa0 RCX: 00007f5bc998cda9 > RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000007 > RBP: 00007f5bc9a0e2a0 R08: 0000000000000000 R09: 0000000000000003 > R10: 0000000000007c00 R11: 0000000000000246 R12: 0000000000000000 > R13: 0000000000000000 R14: 00007f5bc9ba5fa0 R15: 00007fff90caf808 > > > > --- > 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. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup