From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 1D708291C10 for ; Mon, 20 Jul 2026 09:18:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784539111; cv=none; b=icVp60++ifwpAy7CJNLZGbkFoKtcG/lJJcJ+qWfpXBQpWFc5P1a/oxiZPXydNQWQE2+pu0r85zT0DNkl+UAaJMrbD8EJbcCLFwfvRMnoVa6kd2yZe8sH5btJaM/MqN+6wqpKoCc/o8omGjReFvb6M8aWEr1i8Mx+R6khBQt89og= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784539111; c=relaxed/simple; bh=OjSlO7L/47/oCEhL5nfm2cuZjo/rGLmL1KAsnWVmuMc=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=qYsQpnt8WZtjEsxI6VsROK6sYijGgNwDFbQZS64YFholb+6AK4GKyAFNWfQzsTz8Mh6D7b8cW/mYYqBFI9xTF6xWi4WoNty1V82ekuMF3MeiOdFiu46dXfHspnM/2LrMUdqqg4fwkgrrj7stBe4/ZVa3P3poqqeAazxX9kYe3gE= 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=209.85.167.206 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-oi1-f206.google.com with SMTP id 5614622812f47-4a46a76f236so1825016b6e.1 for ; Mon, 20 Jul 2026 02:18:29 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784539109; x=1785143909; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=5N8a9xJAEh3ZFvP5fC1UnjnIGPW/J8eDuSUC835aYp4=; b=qHJ8DDBtxfifgqCa5CTkPipMzovzm8k8Pf0HUIH9vncF/bBgbRlai7YZZpuXtUNzQF fVt2Mh81bbegLQvjxoPondKdsSGXq1/MX3+4GI+IPf7ipY2gD/J0qw96dytkz3Ld2UII amH6HxFJIA8RMwMjZ1/sjQZuGru+jIMqmovRvI4umkq4M2xPRWv8UUqlSRfufJ03EVgO SKG90mWwYZftwCdAuc5HuCgpl457jh/oLS3sq2+FR7QK1nXp4wEdcmTEIuz0o5Ywnx+7 1sLQNfYtHp8t4iRmJxi4OY6ixebxH6Si3mK9VGZZPPS7EAX+CqkDQutP8at9NTadTFOX 5Z+A== X-Forwarded-Encrypted: i=1; AHgh+RrIVYceZ3WN52CmamP28TG5/bEfnTOHmkLjDrRz8VJ7AHDCLPAThYNcopuFLBzhDa2p6omwS1kXtpNwbg==@vger.kernel.org X-Gm-Message-State: AOJu0Yy9gzEWR6F9cexDZPHy/uEcl+9H2tZHtaihZOOZTkfGNABmFXFq tetPV2wZF5uQIdhF2p2wAaC3iUAYgH3iHr4TBLP0VJ8+1Y3IQAHQrGwowuK753CzEjgWbSrWmeK zAUIldsnvcllrTprPTrFiyXO0nNO1IRgWYq/c9AzKRHUBjNAZ+i8u3O/r8hk= Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4fde:b0:497:dedc:605c with SMTP id 5614622812f47-4a4d01f0c8cmr9230992b6e.7.1784539109035; Mon, 20 Jul 2026 02:18:29 -0700 (PDT) Date: Mon, 20 Jul 2026 02:18:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a5de7e5.f1649fcc.2a4208.052f.GAE@google.com> Subject: [syzbot] [btrfs?] kernel BUG in radix_tree_tag_set From: syzbot To: clm@fb.com, dsterba@suse.com, linux-btrfs@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: 37e2f878a7a6 Merge tag 'linux_kselftest-kunit-fixes-7.2-rc.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13878b46580000 kernel config: https://syzkaller.appspot.com/x/.config?x=98da55a882774dfe dashboard link: https://syzkaller.appspot.com/bug?extid=edbd404a2566556eed08 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fe4eac79f31b/disk-37e2f878.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3befde5dfc88/vmlinux-37e2f878.xz kernel image: https://storage.googleapis.com/syzbot-assets/6e5c89a0b86b/bzImage-37e2f878.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+edbd404a2566556eed08@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at lib/radix-tree.c:974! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 1429 Comm: kworker/u8:10 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026 Workqueue: btrfs-endio-write btrfs_work_helper RIP: 0010:radix_tree_tag_set+0x3ff/0x410 lib/radix-tree.c:974 Code: c7 c7 20 10 96 8f 48 8b 14 24 e8 ac 26 c2 f9 e9 dc fe ff ff e8 12 3b 88 f6 90 0f 0b e8 0a 3b 88 f6 90 0f 0b e8 02 3b 88 f6 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffc900063376e0 EFLAGS: 00010293 RAX: ffffffff8b3cfd8e RBX: 0000000000000005 RCX: ffff88802924be00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8e1c3000 R12: ffff88805e3fc188 R13: 1ffff110072500c4 R14: 0000000000000000 R15: ffff888065c981f8 FS: 0000000000000000(0000) GS:ffff888125c49000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8125d8a6b0 CR3: 0000000053ae4000 CR4: 00000000003526f0 Call Trace: record_root_in_trans+0x23a/0x330 fs/btrfs/transaction.c:437 btrfs_record_root_in_trans+0x15a/0x180 fs/btrfs/transaction.c:508 start_transaction+0x3a4/0x1880 fs/btrfs/transaction.c:794 btrfs_finish_one_ordered+0x8bb/0x1f00 fs/btrfs/inode.c:3077 btrfs_work_helper+0x338/0xc30 fs/btrfs/async-thread.c:312 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:radix_tree_tag_set+0x3ff/0x410 lib/radix-tree.c:974 Code: c7 c7 20 10 96 8f 48 8b 14 24 e8 ac 26 c2 f9 e9 dc fe ff ff e8 12 3b 88 f6 90 0f 0b e8 0a 3b 88 f6 90 0f 0b e8 02 3b 88 f6 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 RSP: 0018:ffffc900063376e0 EFLAGS: 00010293 RAX: ffffffff8b3cfd8e RBX: 0000000000000005 RCX: ffff88802924be00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8e1c3000 R12: ffff88805e3fc188 R13: 1ffff110072500c4 R14: 0000000000000000 R15: ffff888065c981f8 FS: 0000000000000000(0000) GS:ffff888125c49000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8125d8a6b0 CR3: 0000000053ae4000 CR4: 00000000003526f0 --- 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