From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (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 2A28832C94B for ; Fri, 9 Jan 2026 08:25:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767947121; cv=none; b=uQo5aWx92+CRmc3aKA/8p7FX2GxbcosU/d8wehwysj8UQOp9CxSI5cwgO76KzRuKsl1MOZUYqhgEufvL0hp/K4XSeVlVRlPtC1BQR04eO+/EzL6my43A9eQi+FBj6kvrK6oHR6FSeMDZtBTvn4X8hC6tSdDD31TUVihTkdQQFT8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767947121; c=relaxed/simple; bh=y6IntBtW5fRegrKQ+rapKe9CIvJcfL3+X/O23pZKRDM=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=MGPu8yDfTKR6rLTzVU0oawIaxwbTHRG1RAioQvSu/gSYegF2qScIw+dS0KzYhO+IaQHUPgE5LkkKPc3bu7e/LEtwIyHT2h/Z/LwhWPmRlk0v+2YhoFGyUPY/xi3z18R9ncmdqx8X26vkhtp/Cye5joyelB8G+TFDE/QOiB3orAo= 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=209.85.167.197 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-f197.google.com with SMTP id 5614622812f47-45a135956eeso7704482b6e.0 for ; Fri, 09 Jan 2026 00:25:05 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1767947102; x=1768551902; 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=p5YgDdD+dDoriZpcjTrBNDazL9BzYR2ZQqzAko3p7fY=; b=QJz5z5kJEFCAYx0hE0p/9r4UtwwitP++AjlCDF1+9j4i9UXKdJ7iYpw7Gz3ii1UJx0 YYeviIeInAAtqm5g75J0MdZd5OveYFiFd+2c/WJbELIpvygcVhKM7jcNHP9gV8cV5MWo FxV/BoH9jwMwAw6XDwYkrKp24ljvt6mE5V0rhr8N8AxWRLhqbtnmq8icqbniMDQa+YAG K4zKYY39ZoCsg/FKc9Sg20710sQey2vWFfgt5SEkyU9IbczlhAnwmv1Gn1xDgyy9wc5F pJILVW98eot1VPJEyu2leUQrDLKUN6zoyonXw7R6tpXFzO7dZHph1s0AKERpWqzwPRiH gfKQ== X-Forwarded-Encrypted: i=1; AJvYcCWiuv5mfwnQ3VbaJiIVIP+mB1BLob4m/3dNbCNl4eE/TMwx/J9PDdnWDHyt9+ETHktBvdHiWdbGFG25OLU=@vger.kernel.org X-Gm-Message-State: AOJu0YxaLyNQvANMMi0IQrrPVrdHiSo0BlhRKU//969YNsYmWmHfG3VD UUjMwqL0prLIuAJkI13HJ9n6ffIT+JdBRF/SOEQCJZ6mEiVxNo5UsmwuezOIPBrN4fht2g38DNT SHVnJ4WiG3K0ECGpis27uDNAR77eriJWlDWlYWC967UPBDz6efQzHIC81Psg= X-Google-Smtp-Source: AGHT+IER3UHWZxQDZRKL+WXBk8N/MdBfMnfpmVeaygmQAO85IJL2tNwMIV0ehoRuqSLv5eL9VySKOUTVy2TBl5CPXhYincghhlUB Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:6785:b0:450:474b:2736 with SMTP id 5614622812f47-45a6be6854dmr5221439b6e.45.1767947102281; Fri, 09 Jan 2026 00:25:02 -0800 (PST) Date: Fri, 09 Jan 2026 00:25:02 -0800 In-Reply-To: <20260109080649.582553-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6960bb5e.050a0220.1c677c.03bb.GAE@google.com> Subject: Re: [syzbot] [btrfs?] general protection fault in create_empty_buffers (5) From: syzbot To: kartikey406@gmail.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 kernel_clone+0xfc/0x910 kernel/fork.c:2651 __do_sys_clone+0xce/0x120 kernel/fork.c:2792 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 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:858! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 2 UID: 0 PID: 6603 Comm: syz.0.90 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:ffffc900040af808 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802b89c980 RSI: ffffffff81f85248 RDI: ffff88802b89ce04 RBP: 0000000000000c40 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff9088b8d7 R11: 0000000000000001 R12: 0000000000000002 R13: ffffea0000936400 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f83919c36c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f83919c2f98 CR3: 000000002db08000 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: 0033:0x7f8390b8f7c9 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:00007f83919c3038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f8390de6090 RCX: 00007f8390b8f7c9 RDX: 00002000000000c0 RSI: 0000200000000080 RDI: 00002000000001c0 RBP: 00007f8390c13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004418 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8390de6128 R14: 00007f8390de6090 R15: 00007ffc2a9b3b58 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:ffffc900040af808 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88802b89c980 RSI: ffffffff81f85248 RDI: ffff88802b89ce04 RBP: 0000000000000c40 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff9088b8d7 R11: 0000000000000001 R12: 0000000000000002 R13: ffffea0000936400 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f83919c36c0(0000) GS:ffff8880d6af5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f83919c2f98 CR3: 000000002db08000 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=15105074580000 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=10205074580000