From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f79.google.com (mail-io1-f79.google.com [209.85.166.79]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3D9D2196C8B for ; Fri, 14 Jun 2024 12:17:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718367443; cv=none; b=HTeGUpUOGBAb/cYbyGB/qezlfonFVLHbZ23nqcZD9g6sUCyoXmoNGPY6zIOU5dLo85HO0mVImJUyvM15rwudbF+IQYLjBhiU2jLICTbXPLoG5p31B5O7p69vsch0H1AW9viWCW58WERitlcrMgLyAj6yyF8l1JseJHlufpyulGE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718367443; c=relaxed/simple; bh=Exj63OoisrZhR8WLJdEruzSEulGzSeKI22HLLV2dkS0=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=PozFPH7pC1pvxYhK/YIy8NgYxZhCS5suoXrhbZDzmgX/Z42VMqwXq5I7v2QVeWRb0VgzJhCM8+SbgTPNRYZqEdYYrq3AtmE6hK+LKg6RL1njR1sUohNmFJenBNfRAFWnBDw5+W1sDOG7bWerAVeDImKnbfJU4YvceGTAkD28AXA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.79 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f79.google.com with SMTP id ca18e2360f4ac-7ebe8016637so120740539f.3 for ; Fri, 14 Jun 2024 05:17:22 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718367441; x=1718972241; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=HnIUaiLobppew0KZWTezY3pR7gs3y0V2DGXixWAfN0g=; b=rFaaFbcZQ1QD7jSEKb0TEZG2pRSFleKRLyWBWnFSaEJ6eSLsn9reH6iGq+42tDp9I0 NWlR4+IrnC18RrkGwUwVVlvydN0jBe8SFdTMb+nNikQGe1E+MA2BWYCxacAohW60Xic3 GbiUh0XDs0rND2eFEgVgVVLvCfS6SoyIfGor+I3ziQi6RRiRUiyBgRcflRqg6quGSRKM Zz7VSoixNRlpn/Ie8j1/m+SNiMu4FUTy9H6E5n8Ae6WL+nWdobnk7ECfSiI6+cfq6mfv 5hXg17xpJC6ESVTfwibELWKOMmSH1wYalV9RyyX39pLj2osOx1PslWP4tPrD9LogsBTc bfSg== X-Forwarded-Encrypted: i=1; AJvYcCX4g3iYfGD46ezOTQKcBmCcIUHXu8uwK3HdRVa/vrbKrZeZrxUmflQu+VJd8AxNN/4Gyi4RwuLWwb8aKSmHAIcve8KDTjj3nBhN650S X-Gm-Message-State: AOJu0YxRynZ3EeX4yxAYamAwxDztENlPgLJHQSkdciNDJrC2v8QHAmV8 HzpCakimQMOmzTfbib0jZ8Tku7TELdSPTpH5A8ugf2nq/C0DDnpmrA7Qw9k+G+huAv0oNozLZ5p G/viXVMKjwle6U2lnDOu6fAOx7gAqp3KyotvKE8UyJMARZxS+QNfbSMk= X-Google-Smtp-Source: AGHT+IHVGxjV8uG6wOLl/zEVzuS7ua50Q6Ux9yP0OAdWjrZn3+sXJGGvxTR9V95Gc//dwaC4Qb12H2sb5BQ+Euj3sefnB3pSuv3z Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:6424:b0:7eb:76f7:4857 with SMTP id ca18e2360f4ac-7ebeaef0783mr2500039f.0.1718367441321; Fri, 14 Jun 2024 05:17:21 -0700 (PDT) Date: Fri, 14 Jun 2024 05:17:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ef1901061ad898e7@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_readdir From: syzbot To: bfoster@redhat.com, kent.overstreet@linux.dev, linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 614da38e2f7a Merge tag 'hid-for-linus-2024051401' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14487874980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5d2cbf33633f507 dashboard link: https://syzkaller.appspot.com/bug?extid=b6e671a90975c257b802 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: https://storage.googleapis.com/syzbot-assets/89eafb874b71/disk-614da38e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/356000512ad9/vmlinux-614da38e.xz kernel image: https://storage.googleapis.com/syzbot-assets/839c73939115/bzImage-614da38e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b6e671a90975c257b802@syzkaller.appspotmail.com dccp_invalid_packet: P.Data Offset(144) too large ===================================================== BUG: KMSAN: uninit-value in bch2_dirent_read_target fs/bcachefs/dirent.c:265 [inline] BUG: KMSAN: uninit-value in bch2_readdir+0xad6/0x2110 fs/bcachefs/dirent.c:572 bch2_dirent_read_target fs/bcachefs/dirent.c:265 [inline] bch2_readdir+0xad6/0x2110 fs/bcachefs/dirent.c:572 bch2_vfs_readdir+0x394/0x840 fs/bcachefs/fs.c:1095 iterate_dir+0x688/0x870 fs/readdir.c:110 __do_sys_getdents64 fs/readdir.c:409 [inline] __se_sys_getdents64+0x169/0x530 fs/readdir.c:394 __x64_sys_getdents64+0x96/0xe0 fs/readdir.c:394 x64_sys_call+0x343d/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:218 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __kmalloc_large_node+0x231/0x370 mm/slub.c:3994 __do_kmalloc_node mm/slub.c:4027 [inline] __kmalloc_node+0xb10/0x10c0 mm/slub.c:4046 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0xc0/0x2d0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] btree_bounce_alloc fs/bcachefs/btree_io.c:118 [inline] bch2_btree_node_read_done+0x4e68/0x75e0 fs/bcachefs/btree_io.c:1185 btree_node_read_work+0x8a5/0x1eb0 fs/bcachefs/btree_io.c:1324 bch2_btree_node_read+0x3d42/0x4b50 __bch2_btree_root_read fs/bcachefs/btree_io.c:1748 [inline] bch2_btree_root_read+0xa6c/0x13d0 fs/bcachefs/btree_io.c:1772 read_btree_roots+0x454/0xee0 fs/bcachefs/recovery.c:457 bch2_fs_recovery+0x7b6a/0x93e0 fs/bcachefs/recovery.c:785 bch2_fs_start+0x7b2/0xbd0 fs/bcachefs/super.c:1043 bch2_fs_open+0x152a/0x15f0 fs/bcachefs/super.c:2105 bch2_mount+0x90d/0x1d90 fs/bcachefs/fs.c:1906 legacy_get_tree+0x114/0x290 fs/fs_context.c:662 vfs_get_tree+0xa7/0x570 fs/super.c:1779 do_new_mount+0x71f/0x15e0 fs/namespace.c:3352 path_mount+0x742/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x725/0x810 fs/namespace.c:3875 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875 x64_sys_call+0x2bf4/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 PID: 9936 Comm: syz-executor.2 Not tainted 6.9.0-syzkaller-02707-g614da38e2f7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 ===================================================== --- 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