From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 85684214207 for ; Tue, 4 Feb 2025 15:33:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738683205; cv=none; b=l1KvIeysPdcLD5ByEIUBS/897HwwTmjA4fC+0Ab4tBP4Kmym8RJnJihZU3NfxMEXmLzbv9vzxX5dgPurUIwohC1vQa84LC3dzVN6+dqcjVI9O51dysW2Lvf41urabDRtTg3A9elghiI+bYapj/Yv5phrDV9scczT2OP3GJ+6RwY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738683205; c=relaxed/simple; bh=WRA/WKB/1cX5TzaHrN/TTlXTa6s9rZhFqhteluIY7+E=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2195:b0:3d0:23f6:2eed with SMTP id e9e14a558f8ab-3d023f63111mr93122455ab.11.1738683202135; Tue, 04 Feb 2025 07:33:22 -0800 (PST) Date: Tue, 04 Feb 2025 07:33:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67a23342.050a0220.163cdc.006b.GAE@google.com> Subject: [syzbot] [bcachefs?] KMSAN: uninit-value in bch2_btree_ptr_v2_validate From: syzbot To: 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: 0de63bb7d919 Merge tag 'pull-fix' of git://git.kernel.org/.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=110078a4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f20bce78db15972a dashboard link: https://syzkaller.appspot.com/bug?extid=655143dc5f99972b52e6 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=11c74f64580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c74f64580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b06dbcd0bfdc/disk-0de63bb7.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/bc7060cef2b6/vmlinux-0de63bb7.xz kernel image: https://storage.googleapis.com/syzbot-assets/3578d0574f33/bzImage-0de63bb7.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/eec1bd50a821/mount_2.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+655143dc5f99972b52e6@syzkaller.appspotmail.com bucket incorrectly unset in freespace btree u64s 5 type deleted 0:29:0 len 0 ver 0, , continuing ===================================================== BUG: KMSAN: uninit-value in bpos_le fs/bcachefs/bkey.h:113 [inline] BUG: KMSAN: uninit-value in bpos_ge fs/bcachefs/bkey.h:125 [inline] BUG: KMSAN: uninit-value in bch2_btree_ptr_v2_validate+0x51c/0xb20 fs/bcachefs/extents.c:211 bpos_le fs/bcachefs/bkey.h:113 [inline] bpos_ge fs/bcachefs/bkey.h:125 [inline] bch2_btree_ptr_v2_validate+0x51c/0xb20 fs/bcachefs/extents.c:211 bch2_bkey_val_validate+0x357/0x530 fs/bcachefs/bkey_methods.c:143 btree_node_bkey_val_validate fs/bcachefs/btree_io.c:838 [inline] bset_key_validate fs/bcachefs/btree_io.c:859 [inline] validate_bset_keys+0x20e3/0x2350 fs/bcachefs/btree_io.c:942 validate_bset_for_write+0x2b3/0x410 fs/bcachefs/btree_io.c:1987 __bch2_btree_node_write+0x53df/0x6830 fs/bcachefs/btree_io.c:2197 bch2_btree_node_write_trans+0xd7/0x890 fs/bcachefs/btree_io.c:2357 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline] btree_update_nodes_written fs/bcachefs/btree_update_interior.c:816 [inline] btree_interior_update_work+0x3e3f/0x4820 fs/bcachefs/btree_update_interior.c:844 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3317 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3398 kthread+0x6b9/0xef0 kernel/kthread.c:464 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was stored to memory at: memcpy_u64s_small fs/bcachefs/util.h:416 [inline] bkey_p_copy fs/bcachefs/bkey.h:40 [inline] bch2_sort_keys_keep_unwritten_whiteouts+0x17d1/0x19d0 fs/bcachefs/bkey_sort.c:187 __bch2_btree_node_write+0x3ae8/0x6830 fs/bcachefs/btree_io.c:2140 bch2_btree_node_write_trans+0xd7/0x890 fs/bcachefs/btree_io.c:2357 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline] btree_update_nodes_written fs/bcachefs/btree_update_interior.c:816 [inline] btree_interior_update_work+0x3e3f/0x4820 fs/bcachefs/btree_update_interior.c:844 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xae0/0x1c40 kernel/workqueue.c:3317 worker_thread+0xea7/0x14f0 kernel/workqueue.c:3398 kthread+0x6b9/0xef0 kernel/kthread.c:464 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Uninit was created at: ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4249 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4266 __do_kmalloc_node mm/slub.c:4282 [inline] __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4300 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:662 btree_node_data_alloc fs/bcachefs/btree_cache.c:156 [inline] bch2_btree_node_mem_alloc+0xa72/0x2ee0 fs/bcachefs/btree_cache.c:834 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:304 [inline] bch2_btree_reserve_get+0x37f/0x2290 fs/bcachefs/btree_update_interior.c:532 bch2_btree_update_start+0x1af9/0x2d60 fs/bcachefs/btree_update_interior.c:1230 bch2_btree_split_leaf+0x120/0xc90 fs/bcachefs/btree_update_interior.c:1851 bch2_trans_commit_error+0x1c0/0x1d60 fs/bcachefs/btree_trans_commit.c:908 __bch2_trans_commit+0x1d60/0xd310 fs/bcachefs/btree_trans_commit.c:1085 bch2_trans_commit fs/bcachefs/btree_update.h:183 [inline] bch2_journal_replay+0x3082/0x4d30 fs/bcachefs/recovery.c:373 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:226 [inline] bch2_run_recovery_passes+0x5a2/0x1160 fs/bcachefs/recovery_passes.c:291 bch2_fs_recovery+0x489c/0x6230 fs/bcachefs/recovery.c:936 bch2_fs_start+0x7ca/0xc20 fs/bcachefs/super.c:1030 bch2_fs_get_tree+0x143a/0x2330 fs/bcachefs/fs.c:2203 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814 do_new_mount+0x71f/0x15e0 fs/namespace.c:3560 path_mount+0x742/0x1f10 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x71f/0x800 fs/namespace.c:4088 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 1092 Comm: kworker/u8:7 Not tainted 6.14.0-rc1-syzkaller-00020-g0de63bb7d919 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: btree_update btree_interior_update_work ===================================================== --- 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