From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) (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 3733F1624C5 for ; Fri, 9 Jan 2026 04:50:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767934205; cv=none; b=Hi6N+WKINDesRkP85Wd+ELzW9Eo0fdXz+SOwFQxJXKyYtRb5w4a5X4CUZExcyiybazJO3bptUcK3yLWLB4ZL4CjE47A50GBb2ViOwGVhODzF3qNcpm8jYA6Ce6WFVhjRhgK1heCXUif5gW04r83Mxfv6f2BFUJeuMBq7+w745tg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767934205; c=relaxed/simple; bh=GHvzfCxgCExsvGOHPmLR2QdT415V4ophzpeUmzqLj0E=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=HFl9sv4BNSE0sKzs/zecGGzZAAGSJLBxVBNZ7PJXEfVa2NQ7YP7dmGTsvp51PWi2Bdrk95NhuNjDf71hVGgP5UYk4LbJ+p/6/diDGkiaL6iMqlEOD6dSE3mF7IV6IegyiVaO7SsPz6BLWi7u+I0bWD7xPdDzkbunntWmXk9Hleo= 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=209.85.161.69 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-oo1-f69.google.com with SMTP id 006d021491bc7-656c35cd5b4so4817430eaf.0 for ; Thu, 08 Jan 2026 20:50:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767934203; x=1768539003; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=BuFQh/uX6C0hjNbNz3ahcQCrqlAjBCIhWfhWWxSPFxE=; b=TUe8LbChUVU9u5EKclxesRCK5YAt1kQiKnUXeDFroKkFIyASCRdnYgmhY5P+N1wfpF F7ZQ3Kt9KZrkFBy4QQXC9K2aQICRTE0ggjctS6YCwnVkmvSvtXh4lg8McRI4lNJCmRmR tVFhGulE4gRKumE14UnIwlFn1EfGQPQHXSkH5QnhR7V3rSqNBH7bp9nCsA7q6HnCDXN3 4DVIMzzVm2Pffsrhm4RCXiJEzs+eNhy043DadMMkgLC6akv/b+phzEhVks1hkM9PpgCl qC5iFtHq32CFRSzImR10zoiXx6mjwqqZFRfNLvoFGW4FPnYB/23gBtFISx56GTSq/+v9 dePg== X-Forwarded-Encrypted: i=1; AJvYcCXfYedRiZ7C4TPefLCcZji1mIAj2srRyRkVoJ3Rgt67KSfi5EW8hHX8wAy9JO0j5NbgkZHJx0HUIWO6QUg=@vger.kernel.org X-Gm-Message-State: AOJu0Yy33oIaX+qXAQb1KdmVgVxILqQhwzoMG3OBSYojnTG04cwSO6T/ n+mMuw32oYh+Y+YxoxLeqr2D4nCM3GfVxx6xibqecjDTBFb99B2jcPakAI/lVeJ0xDy28+nQnlX eWLty+yR6KGckx/glVQXztxPlFCqBXAEvSS+Jrpu7y3+1fAyhCscjHk7l3J4= X-Google-Smtp-Source: AGHT+IH2+alc0R6jNjjKXNk57W3usLmsqEPh9ePH3K6M2c591uIoznlY0qYfx7HjZlYBaGgl5VhJBzYkCYHDykw2hJ9OQWHa3GVe Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1aab:b0:659:9a49:8e02 with SMTP id 006d021491bc7-65f55074400mr3161173eaf.68.1767934203168; Thu, 08 Jan 2026 20:50:03 -0800 (PST) Date: Thu, 08 Jan 2026 20:50:03 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <696088fb.050a0220.1c677c.03b2.GAE@google.com> Subject: Re: [syzbot] [btrfs?] general protection fault in create_empty_buffers (5) From: syzbot To: eadavis@qq.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel BUG in __filemap_add_folio process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:858! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 8695 Comm: syz.0.781 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__filemap_add_folio+0xf29/0x11b0 mm/filemap.c:858 Code: 96 c6 ff 48 c7 c6 80 ed 99 8b 4c 89 ef e8 bf 72 11 00 90 0f 0b e8 77 96 c6 ff 48 c7 c6 e0 ed 99 8b 4c 89 ef e8 a8 72 11 00 90 <0f> 0b e8 60 96 c6 ff 90 0f 0b 90 e9 1c fc ff ff e8 52 96 c6 ff 48 RSP: 0018:ffffc9000c72f808 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888026b024c0 RSI: ffffffff81f85248 RDI: ffff888026b02944 RBP: 0000000000000c40 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff9088bbd7 R11: 0000000000000001 R12: 0000000000000002 R13: ffffea0000ce5bc0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f7a297d56c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a297d4f98 CR3: 0000000035522000 CR4: 0000000000352ef0 Call Trace: filemap_add_folio+0x19a/0x610 mm/filemap.c:966 do_read_cache_folio+0x23c/0x5c0 mm/filemap.c:4063 do_read_cache_page mm/filemap.c:4162 [inline] read_cache_page_gfp+0x29/0x120 mm/filemap.c:4195 btrfs_read_disk_super+0x192/0x500 fs/btrfs/volumes.c:1367 btrfs_scan_one_device+0x109/0x820 fs/btrfs/volumes.c:1475 btrfs_get_tree_super fs/btrfs/super.c:1860 [inline] btrfs_get_tree_subvol fs/btrfs/super.c:2089 [inline] btrfs_get_tree+0x5b3/0x2710 fs/btrfs/super.c:2123 vfs_get_tree+0x8e/0x330 fs/super.c:1751 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3636 [inline] do_new_mount fs/namespace.c:3712 [inline] path_mount+0x7bf/0x23a0 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __x64_sys_mount+0x293/0x310 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7a2898f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7a297d5038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7a28be6090 RCX: 00007f7a2898f7c9 RDX: 00002000000000c0 RSI: 0000200000000080 RDI: 00002000000001c0 RBP: 00007f7a28a13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004418 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7a28be6128 R14: 00007f7a28be6090 R15: 00007fff39c82018 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__filemap_add_folio+0xf29/0x11b0 mm/filemap.c:858 Code: 96 c6 ff 48 c7 c6 80 ed 99 8b 4c 89 ef e8 bf 72 11 00 90 0f 0b e8 77 96 c6 ff 48 c7 c6 e0 ed 99 8b 4c 89 ef e8 a8 72 11 00 90 <0f> 0b e8 60 96 c6 ff 90 0f 0b 90 e9 1c fc ff ff e8 52 96 c6 ff 48 RSP: 0018:ffffc9000c72f808 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888026b024c0 RSI: ffffffff81f85248 RDI: ffff888026b02944 RBP: 0000000000000c40 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff9088bbd7 R11: 0000000000000001 R12: 0000000000000002 R13: ffffea0000ce5bc0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f7a297d56c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a297d4f98 CR3: 0000000035522000 CR4: 0000000000352ef0 Tested on: commit: 623fb991 Merge tag 'pinctrl-v6.19-2' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1689319a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a11e0f726bfb6765 dashboard link: https://syzkaller.appspot.com/bug?extid=b4a2af3000eaa84d95d5 compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=14bd9074580000