From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 142E7DDAB; Tue, 22 Oct 2024 01:34:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729560891; cv=none; b=DNGMIdqKakon8UkyaUIgibdUpW86Tco3Bo83ZIPiSF0Ti8RhEeyWOzPvlMd+E1QeCAm/9e2EtIUoaDfqFQGXpqlkHlPWsaU5MYzRLZH6t22ApQjkdEDY+OfXupygxpf607+DRyBi+fJRi22suox3lhi9TbQpvbmoCsKRItMlqaU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729560891; c=relaxed/simple; bh=U1t5H9KMAGplXd+4dfjgkmnyOonoucwRr1r/MWt1X7s=; h=Content-Type:Message-ID:Date:MIME-Version:Subject:To:References: From:In-Reply-To; b=jvUWMoKCFqcAh83isnlGvcRrE7dYpUZs63tjN5/pwZJlbBnGuFOAOQQsRGBGTmle0WlrN9sQ3nOxv2kTBNVvvXrHOFyzslnUi8DfwiOiYRVWfbSyGYQqMJpYUqNLNlmvChc4rNvHd42uDvVfAB5VzIag1lZ8bWyCmuPQaWW2JgY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.190 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.17]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4XXZSY2z8jz2Fb7s; Tue, 22 Oct 2024 09:33:17 +0800 (CST) Received: from dggpeml500022.china.huawei.com (unknown [7.185.36.66]) by mail.maildlp.com (Postfix) with ESMTPS id CB8E61A0188; Tue, 22 Oct 2024 09:34:38 +0800 (CST) Received: from [10.67.111.104] (10.67.111.104) by dggpeml500022.china.huawei.com (7.185.36.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Tue, 22 Oct 2024 09:34:38 +0800 Content-Type: multipart/mixed; boundary="------------rJdxhcEMxXilpbky7mxxYNYR" Message-ID: Date: Tue, 22 Oct 2024 09:34:36 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] [bcachefs?] UBSAN: shift-out-of-bounds in bch2_alloc_to_text To: syzbot , , , , References: <6715f84b.050a0220.10f4f4.003e.GAE@google.com> Content-Language: en-US From: Hongbo Li In-Reply-To: <6715f84b.050a0220.10f4f4.003e.GAE@google.com> X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To dggpeml500022.china.huawei.com (7.185.36.66) --------------rJdxhcEMxXilpbky7mxxYNYR Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git c964ced77262 On 2024/10/21 14:44, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: c964ced77262 Merge tag 'for-linus' of git://git.kernel.org.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=12d9745f980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=cfbd94c114a3d407 > dashboard link: https://syzkaller.appspot.com/bug?extid=7f45fa9805c40db3f108 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12637887980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12a1e830580000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-c964ced7.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/e937ef58569a/vmlinux-c964ced7.xz > kernel image: https://storage.googleapis.com/syzbot-assets/f1df9880ca4b/bzImage-c964ced7.xz > mounted in repro: https://storage.googleapis.com/syzbot-assets/00439b875347/mount_0.gz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+7f45fa9805c40db3f108@syzkaller.appspotmail.com > > bcachefs (loop0): fatal error - emergency read only > bcachefs (loop0): insufficient writeable journal devices available: have 0, need 1 > rw journal devs: loop0 > ------------[ cut here ]------------ > UBSAN: shift-out-of-bounds in fs/bcachefs/alloc_background.h:165:13 > shift exponent 129 is too large for 32-bit type 'unsigned int' > CPU: 0 UID: 0 PID: 5104 Comm: syz-executor159 Not tainted 6.12.0-rc3-syzkaller-00087-gc964ced77262 #0 > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 > Call Trace: > > __dump_stack lib/dump_stack.c:94 [inline] > dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 > ubsan_epilogue lib/ubsan.c:231 [inline] > __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468 > data_type_movable fs/bcachefs/alloc_background.h:165 [inline] > alloc_lru_idx_fragmentation fs/bcachefs/alloc_background.h:171 [inline] > bch2_alloc_to_text+0xc79/0xce0 fs/bcachefs/alloc_background.c:369 > __bch2_bkey_fsck_err+0x1c8/0x280 fs/bcachefs/error.c:454 > bch2_alloc_v4_validate+0x931/0xef0 fs/bcachefs/alloc_background.c:259 > bch2_btree_node_read_done+0x3e7e/0x5e90 fs/bcachefs/btree_io.c:1223 > btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1327 > bch2_btree_node_read+0x2433/0x2a10 > __bch2_btree_root_read fs/bcachefs/btree_io.c:1753 [inline] > bch2_btree_root_read+0x617/0x7a0 fs/bcachefs/btree_io.c:1775 > read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:524 > bch2_fs_recovery+0x2585/0x39c0 fs/bcachefs/recovery.c:854 > bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036 > bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2174 > vfs_get_tree+0x90/0x2b0 fs/super.c:1800 > do_new_mount+0x2be/0xb40 fs/namespace.c:3507 > do_mount fs/namespace.c:3847 [inline] > __do_sys_mount fs/namespace.c:4055 [inline] > __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 > 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: 0033:0x7f7b61a11dea > Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007ffff7f9a888 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 > RAX: ffffffffffffffda RBX: 00007ffff7f9a8a0 RCX: 00007f7b61a11dea > RDX: 00000000200058c0 RSI: 0000000020000100 RDI: 00007ffff7f9a8a0 > RBP: 0000000000000004 R08: 00007ffff7f9a8e0 R09: 00000000000058c6 > R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 > R13: 00007ffff7f9a8e0 R14: 0000000000000003 R15: 0000000001000000 > > ---[ end trace ]--- > > > --- > 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 syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > 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 > --------------rJdxhcEMxXilpbky7mxxYNYR Content-Type: text/plain; charset="UTF-8"; name="0001-bcachefs-Fix-shift-out-of-bounds-in-bch2_alloc_to_te.patch" Content-Disposition: attachment; filename*0="0001-bcachefs-Fix-shift-out-of-bounds-in-bch2_alloc_to_te.pa"; filename*1="tch" Content-Transfer-Encoding: base64 RnJvbSAxN2ZkMzY2MDkxZDEwNDcwMmFmNWIwNjk5YWM3M2IwNmQwYjU3NjE5IE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQ0KRnJvbTogSG9uZ2JvIExpIDxsaWhvbmdibzIyQGh1YXdlaS5j b20+DQpEYXRlOiBNb24sIDIxIE9jdCAyMDI0IDE1OjM1OjA5ICswODAwDQpTdWJqZWN0OiBb UEFUQ0hdIGJjYWNoZWZzOiBGaXggc2hpZnQtb3V0LW9mLWJvdW5kcyBpbiBiY2gyX2FsbG9j X3RvX3RleHQNCg0KVGhlIHN5emJvdCBmb3VuZCB0aGUgZm9sbG93aW5nIGlzc3VlOg0KYGBg DQotLS0tLS0tLS0tLS1bIGN1dCBoZXJlIF0tLS0tLS0tLS0tLS0NClVCU0FOOiBzaGlmdC1v dXQtb2YtYm91bmRzIGluIGZzL2JjYWNoZWZzL2FsbG9jX2JhY2tncm91bmQuaDoxNjU6MTMN CnNoaWZ0IGV4cG9uZW50IDEyOSBpcyB0b28gbGFyZ2UgZm9yIDMyLWJpdCB0eXBlICd1bnNp Z25lZCBpbnQnDQoNCkNhbGwgVHJhY2U6DQogPFRBU0s+DQogX19kdW1wX3N0YWNrIGxpYi9k dW1wX3N0YWNrLmM6OTQgW2lubGluZV0NCiBkdW1wX3N0YWNrX2x2bCsweDI0MS8weDM2MCBs aWIvZHVtcF9zdGFjay5jOjEyMA0KIHVic2FuX2VwaWxvZ3VlIGxpYi91YnNhbi5jOjIzMSBb aW5saW5lXQ0KIF9fdWJzYW5faGFuZGxlX3NoaWZ0X291dF9vZl9ib3VuZHMrMHgzYzgvMHg0 MjAgbGliL3Vic2FuLmM6NDY4DQogZGF0YV90eXBlX21vdmFibGUgZnMvYmNhY2hlZnMvYWxs b2NfYmFja2dyb3VuZC5oOjE2NSBbaW5saW5lXQ0KIGFsbG9jX2xydV9pZHhfZnJhZ21lbnRh dGlvbiBmcy9iY2FjaGVmcy9hbGxvY19iYWNrZ3JvdW5kLmg6MTcxIFtpbmxpbmVdDQogYmNo Ml9hbGxvY190b190ZXh0KzB4Yzc5LzB4Y2UwIGZzL2JjYWNoZWZzL2FsbG9jX2JhY2tncm91 bmQuYzozNjkNCiBfX2JjaDJfYmtleV9mc2NrX2VycisweDFjOC8weDI4MCBmcy9iY2FjaGVm cy9lcnJvci5jOjQ1NA0KIGJjaDJfYWxsb2NfdjRfdmFsaWRhdGUrMHg5MzEvMHhlZjAgZnMv YmNhY2hlZnMvYWxsb2NfYmFja2dyb3VuZC5jOjI1OQ0KIC4uLg0KYGBgDQoNCkluIGJjaDJf YWxsb2NfdjRfdmFsaWRhdGUsIGJjYWNoZWZzIGRvZXNuJ3QgY2hlY2sgdGhlIGludmFsaWQN CmRhdGFfdHlwZSBpbiBzd2l0Y2gtY2FzZS4gQW5kIHRoaXMgd2lsbCBjYXVzZSBzaGlmdC1v dXQtb2YtYm91bmRzDQplcnJvciBmb3IgaW52YWxpZCBkYXRhX3R5cGUuIFRoaXMgY2FuIGJl IGVhc2lseSBhdm9pZGVkIGJ5IGFkZGluZw0KdGhlIGRlZmF1bHQgYnJhbmNoIGluIHN3aXRj aCBzdGF0ZW1lbnQgZm9yIGhhbmRsaW5nIHRoZSBkYXRhX3R5cGUuDQoNClJlcG9ydGVkLWJ5 OiBzeXpib3QrN2Y0NWZhOTgwNWM0MGRiM2YxMDhAc3l6a2FsbGVyLmFwcHNwb3RtYWlsLmNv bQ0KQ2xvc2VzOiBodHRwczovL3N5emthbGxlci5hcHBzcG90LmNvbS9idWc/ZXh0aWQ9N2Y0 NWZhOTgwNWM0MGRiM2YxMDgNCkZpeGVzOiA3MWFiYTU5MDI5N2UgKCJiY2FjaGVmczogQWx3 YXlzIGNoZWNrIGFsbG9jIGRhdGEgdHlwZSIpDQpTaWduZWQtb2ZmLWJ5OiBIb25nYm8gTGkg PGxpaG9uZ2JvMjJAaHVhd2VpLmNvbT4NCi0tLQ0KIGZzL2JjYWNoZWZzL2FsbG9jX2JhY2tn cm91bmQuYyB8IDQgKysrKw0KIDEgZmlsZSBjaGFuZ2VkLCA0IGluc2VydGlvbnMoKykNCg0K ZGlmZiAtLWdpdCBhL2ZzL2JjYWNoZWZzL2FsbG9jX2JhY2tncm91bmQuYyBiL2ZzL2JjYWNo ZWZzL2FsbG9jX2JhY2tncm91bmQuYw0KaW5kZXggNmUxNjFmOGZmZThkLi4wOWZmNDFjYWM1 ZjggMTAwNjQ0DQotLS0gYS9mcy9iY2FjaGVmcy9hbGxvY19iYWNrZ3JvdW5kLmMNCisrKyBi L2ZzL2JjYWNoZWZzL2FsbG9jX2JhY2tncm91bmQuYw0KQEAgLTMxNCw2ICszMTQsMTAgQEAg aW50IGJjaDJfYWxsb2NfdjRfdmFsaWRhdGUoc3RydWN0IGJjaF9mcyAqYywgc3RydWN0IGJr ZXlfc19jIGssDQogCQlicmVhazsNCiAJY2FzZSBCQ0hfREFUQV9zdHJpcGU6DQogCQlicmVh azsNCisJZGVmYXVsdDoNCisJCWJrZXlfZnNja19lcnJfb24odHJ1ZSwgYywgYWxsb2Nfa2V5 X2RhdGFfdHlwZV9iYWQsDQorCQkJCSAidW5rbm93biBkYXRhIHR5cGUgJXUiLCBhLmRhdGFf dHlwZSk7DQorCQlicmVhazsNCiAJfQ0KIGZzY2tfZXJyOg0KIAlyZXR1cm4gcmV0Ow0KLS0g DQoyLjM0LjENCg== --------------rJdxhcEMxXilpbky7mxxYNYR--