From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f207.google.com (mail-oi1-f207.google.com [209.85.167.207]) (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 2D5661E9B1A for ; Mon, 10 Aug 2026 00:25:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786321533; cv=none; b=en2yPJQ+20/kMK9r+nGsjdmIj6pwd7/9jbDBERyAtbDPDyKiX7+iTkZnGm8kTylg5Im//X5wgl/RBSFNUCyENtBcEt3HcD1WbFkFAmhRvwWZOFzn1m4EhwxVXZGWPijX28jAw3r/gFX0/DeYj2hq0XfrB5IuBvoUtreefSpjzVs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786321533; c=relaxed/simple; bh=oSIHmWCq+zc7HGNNzWQ+0Nk0aCfTaME6N4SswlX8BjM=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=YNL9Y2Xt2dGHWzE7iKNJ8GdwDzN8V91rWSWicIdVlZqlo3feAZKRrSRAqPM3ANXOCY2/cTtHgC9EDZG6tUP/frDWXZ0tFgG6H6C7CfMUXilKyEbxBVMsPgaQtJSNTxJ/AIFxJ2ar2Hwa7WnU0uQ3TEETU6DT7PSDN4rAi7hEZN8= 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=209.85.167.207 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-f207.google.com with SMTP id 5614622812f47-4ab8b4887d4so960822b6e.1 for ; Sun, 09 Aug 2026 17:25:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786321531; x=1786926331; 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=QBAyexVC8K2C/49XqeyAP/AsC9x90y51/W2V02S4oyY=; b=I20vBxN8blancgsgzLyhrpkZOKp6OASSigqJGgsOicginIDlv1KrgJ/End497xMXRx EtdqQLeQ5vUBEeL1dUQ5oQ2mFcPu4Gmfnpg0/hnMDLO8iAP3Sje9/jZh6Fbch7a8Mwhn TUCx/DAy8J6NE28uRklUcb9K1T0OUxDc3PTh0vYsJyEL/UdMvjDdacfFHIRj1jq/YDZb rS9T93IqqqA+IyN6zsgLjo1zyLjF106vf+OJBM89XtuSrQ++UfeSbqsPCxf9Pz2RkPW9 k9hrXcAtixHwGfW/xc33WFV/lEBkJi3UUJwHhy5syXiONWcKNK3y4ErN5mTeMI8MhCsP +XdA== X-Forwarded-Encrypted: i=1; AHgh+Ro/QY3DvDTbklqlVvZMHVvX86/NkYeaXWX2sRhKY8qAkTh31Cs2HvShqh45OyZHmq537v0VHuQNsIsP6lw=@vger.kernel.org X-Gm-Message-State: AOJu0YwSpxkHjnsuAObNHOaOwrVVS4XxiBGOpHtiqNVXM6olOfDW2Myj Y32mlalhk1U52obmtNsa5WhHset9c5JOvOMkRdnj/BVJFhbzJ2WpFzS0kMk56duBooeO4/jK6zb WVs4Yu+Nx70hpkrGew797yhfNYv/5m3GJjmz0WcEPS1sG8V3mZYzN0iMphLE= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:c183:b0:479:f7e7:4a81 with SMTP id 5614622812f47-4b1ab3540ffmr9325638b6e.0.1786321531077; Sun, 09 Aug 2026 17:25:31 -0700 (PDT) Date: Sun, 09 Aug 2026 17:25:31 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a791a7b.01d0871a.3a0d52.0098.GAE@google.com> Subject: [syzbot] [jffs2?] kernel BUG in jffs2_garbage_collect_pass From: syzbot To: dwmw2@infradead.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, richard@nod.at, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 562bfb501c54 Merge tag 'integrity-v7.2-rc7' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13a35bb9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cb17729fb04b1e3a dashboard link: https://syzkaller.appspot.com/bug?extid=9bbc6788187abbabb2ee 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/dc0b8603d3a0/disk-562bfb50.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/08c750d8b185/vmlinux-562bfb50.xz kernel image: https://storage.googleapis.com/syzbot-assets/6142deb5b95c/bzImage-562bfb50.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9bbc6788187abbabb2ee@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/jffs2/gc.c:226! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 7620 Comm: jffs2_gcd_mtd0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:jffs2_garbage_collect_pass+0x20e7/0x2170 fs/jffs2/gc.c:226 Code: 6b f7 fd 48 8b 7c 24 20 e8 06 6b 16 08 90 0f 0b e8 de de 95 fe bf 02 00 00 00 e8 34 44 64 fe e9 9d e7 ff ff e8 ca de 95 fe 90 <0f> 0b e8 c2 de 95 fe bf 02 00 00 00 e8 18 44 64 fe e9 7a f8 ff ff RSP: 0018:ffffc900041b7aa0 EFLAGS: 00010293 RAX: ffffffff832ffa76 RBX: 0000000000000006 RCX: ffff888029738000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900041b7c70 R08: ffff888029738000 R09: 0000000000000006 R10: 0000000000000100 R11: 0000000000000005 R12: ffff8880357c6410 R13: ffff88805f5ef700 R14: 1ffff1100bebdee2 R15: ffff88805f5ef712 FS: 0000000000000000(0000) GS:ffff888125c3e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f06a384fffc CR3: 0000000056094000 CR4: 00000000003526f0 Call Trace: jffs2_garbage_collect_thread+0x634/0x6c0 fs/jffs2/background.c:155 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:jffs2_garbage_collect_pass+0x20e7/0x2170 fs/jffs2/gc.c:226 Code: 6b f7 fd 48 8b 7c 24 20 e8 06 6b 16 08 90 0f 0b e8 de de 95 fe bf 02 00 00 00 e8 34 44 64 fe e9 9d e7 ff ff e8 ca de 95 fe 90 <0f> 0b e8 c2 de 95 fe bf 02 00 00 00 e8 18 44 64 fe e9 7a f8 ff ff RSP: 0018:ffffc900041b7aa0 EFLAGS: 00010293 RAX: ffffffff832ffa76 RBX: 0000000000000006 RCX: ffff888029738000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900041b7c70 R08: ffff888029738000 R09: 0000000000000006 R10: 0000000000000100 R11: 0000000000000005 R12: ffff8880357c6410 R13: ffff88805f5ef700 R14: 1ffff1100bebdee2 R15: ffff88805f5ef712 FS: 0000000000000000(0000) GS:ffff888125c3e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f06a384fffc CR3: 0000000056094000 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