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 3899862171 for ; Wed, 5 Jun 2024 06:56:29 +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=1717570590; cv=none; b=u+8Gtc8SEnl3SEvmtyDnh2S6EkjzHgMNRdVrv42+yncE5kF7guXQB5281e+owPUfHDARJUy534lgFS+6KLruKhrl6eY7Li9l9cB+hIta9M6FI5GaEAMoe+f2eyvDHAY1wLCHUq1+BnVzdTmuKdism6eeB2pbM5eb3OeJG/uujAE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717570590; c=relaxed/simple; bh=NHKmsHbmxaxmq/t5qOItAZcOd3PP1sLgh1/YDzV6OtM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=m4dlcj26n6l13DxPqlUGAsnl2I9RgDzGPmirl7+4YVdYBLBBw4QvoObi9cHNndjFGLM3fGwRwO3y4WZLMCZxdzfJD0sHD4H0k4tlErOFElef4HXdY/0nhO8Pne+D7d3Msws+E8MwDahJYFZFnSd4vWkDlvbBXd2H9/CMQpR4Ai4= 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-7eb1d659c76so229302239f.0 for ; Tue, 04 Jun 2024 23:56:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1717570588; x=1718175388; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=a+22Nog8kQyyMDWaryrCDehipgD3m/ylHny5P6cbcV8=; b=bm98hYm0qDlMIrdqk2kzF+cCqK0cVOb1e9ZIZYeBc/gLBLhu82ZW6HWm53/GNcth54 ir2Q1AcXde/WO2PBqDSbMzoWif+jdaFP4AStPOidXSxBnFY9WedaLb7afDmq+/7MXxvo Fd9eCyNNzAlfEg/fvb6kRU2JYnMDggwPls3G7TUNfIpR6AQjfl0GOmAf8Hz+6tEPiinB dlPNMNmNkrK7GhBGi8+IeHHhDBasyytIOlwToo+1/0IM6lxTQSdS39HdcI2R2084P0RO 4Dl3lboaLbnDbUBZWIaULCDm5x/CLy4K5EjUTy+8D655YeRGpDgthy5DQ5T32O+USpAp WT8g== X-Forwarded-Encrypted: i=1; AJvYcCU9R0hWo+cENtFmM5Wo+FKakrzCBhuJZxes6uILz6eHKNzNb5FJys5lEvvvC6TmGqD7smYHfpF+/5jGzVHgV5Wc7p1WX51tldhp2EJeFe8= X-Gm-Message-State: AOJu0Yyb/r5lYz3FBdQKYAUn7+p69A6kVXjUFWsaq1fO1+y2w5Fz4AZE fTfLLIf1MbeZly6Nx3gzsMi7kfm9HCsOQ4GKS5QOcffJxWh0CA6+FDtOAqHVwerkk8qZiMHshbx 8JDkQMUz2arSrKQFB1NsidBv0Pe/84u5Sk4+45e7QZ0VkciuI7yZjaxo= X-Google-Smtp-Source: AGHT+IGF2NKMT0QCZAIh9zTQsnF7dh0kIhq6LR3RmJvCsubfL1ZWBaKM2qpvu3yqM4GH/qMBdlNUzMZjMs5ziuUsox6DsTq4H4Om Precedence: bulk X-Mailing-List: linux-bcachefs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1c0d:b0:36c:4cc9:5923 with SMTP id e9e14a558f8ab-374b1ef2622mr919355ab.2.1717570588431; Tue, 04 Jun 2024 23:56:28 -0700 (PDT) Date: Tue, 04 Jun 2024 23:56:28 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000cce9c0061a1f1071@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_dirent_rename 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=14bb8fd2980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f5d2cbf33633f507 dashboard link: https://syzkaller.appspot.com/bug?extid=ee45465624ceb2e49b50 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+ee45465624ceb2e49b50@syzkaller.appspotmail.com bcachefs (loop2): snapshots_read... done bcachefs (loop2): journal_replay... done bcachefs (loop2): resume_logged_ops... done bcachefs (loop2): going read-write bcachefs (loop2): done starting filesystem ===================================================== BUG: KMSAN: uninit-value in dirent_is_visible fs/bcachefs/dirent.c:85 [inline] BUG: KMSAN: uninit-value in is_visible_key fs/bcachefs/str_hash.h:159 [inline] BUG: KMSAN: uninit-value in bch2_hash_lookup_in_snapshot fs/bcachefs/str_hash.h:177 [inline] BUG: KMSAN: uninit-value in bch2_hash_lookup fs/bcachefs/str_hash.h:202 [inline] BUG: KMSAN: uninit-value in bch2_dirent_rename+0x2227/0x54d0 fs/bcachefs/dirent.c:332 dirent_is_visible fs/bcachefs/dirent.c:85 [inline] is_visible_key fs/bcachefs/str_hash.h:159 [inline] bch2_hash_lookup_in_snapshot fs/bcachefs/str_hash.h:177 [inline] bch2_hash_lookup fs/bcachefs/str_hash.h:202 [inline] bch2_dirent_rename+0x2227/0x54d0 fs/bcachefs/dirent.c:332 bch2_rename_trans+0xb24/0x2680 fs/bcachefs/fs-common.c:416 bch2_rename2+0x265c/0x2e40 fs/bcachefs/fs.c:669 vfs_rename+0x1d9a/0x2280 fs/namei.c:4887 do_renameat2+0x18cc/0x1d50 fs/namei.c:5044 __do_sys_renameat2 fs/namei.c:5078 [inline] __se_sys_renameat2 fs/namei.c:5075 [inline] __x64_sys_renameat2+0x153/0x200 fs/namei.c:5075 x64_sys_call+0x2993/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:317 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: 1 PID: 8627 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