linux-kernel - kernel BUG in ntfs

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Date:   Sun, 30 Oct 2022 17:16:55 +0800
From:   Wei Chen <harperchen1110@...il.com>
To:     anton@...era.com
Cc:     linux-kernel@...r.kernel.org, linux-ntfs-dev@...ts.sourceforge.net
Subject: kernel BUG in ntfs_readpage

Dear Linux Developer,

Recently when using our tool to fuzz kernel, the following crash was triggered:

HEAD commit: 64570fbc14f8 Linux 5.15-rc5
git tree: upstream
compiler: gcc 8.0.1
console output:
https://drive.google.com/file/d/1Vgv6uKdZ3XXWzqYUatGc_ca7xD5nHFbz/view?usp=share_link
kernel config: https://drive.google.com/file/d/1uDOeEYgJDcLiSOrx9W8v2bqZ6uOA_55t/view?usp=share_link

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: Wei Chen <harperchen1110@...il.com>

loop0: detected capacity change from 0 to 67
------------[ cut here ]------------
kernel BUG at fs/ntfs/aops.c:186!
invalid opcode: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 22515 Comm: syz-executor.0 Not tainted 5.15.0-rc5 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014
RIP: 0010:ntfs_readpage+0x1468/0x1860
Code: 0e 2c 7d ff 49 8b 9f 30 fd ff ff 31 ff 48 c1 eb 03 83 e3 01 48
89 de e8 16 2d 7d ff 48 85 db 0f 85 61 f5 ff ff e8 e8 2b 7d ff <0f> 0b
e8 e1 2b 7d ff f0 41 80 0c 24 10 e9 d9 f8 ff ff e8 d1 2b 7d
RSP: 0018:ffffc900022bfaf0 EFLAGS: 00010206
RAX: 0000000000009cb0 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90001311000 RSI: ffff8881095cb700 RDI: 0000000000000002
RBP: 0000000000000020 R08: ffffffff81c04778 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea00044bf8c0 R14: ffff88810fea4d80 R15: ffff88810fea50a0
FS:  00007fc3f28c3700(0000) GS:ffff88813dc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000525b40 CR3: 0000000110e31000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_read_cache_page+0x521/0x7a0
 map_mft_record+0xcb/0x600
 ntfs_read_locked_inode+0x69/0x1d20
 ntfs_read_inode_mount+0x517/0xfb0
 ntfs_fill_super+0x8e9/0x1710
 mount_bdev+0x23d/0x280
 legacy_get_tree+0x2e/0x90
 vfs_get_tree+0x29/0x100
 path_mount+0x58e/0x10a0
 do_mount+0x9b/0xb0
 __x64_sys_mount+0x13a/0x150
 do_syscall_64+0x34/0xb0
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46abda
Code: 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc3f28c2a48 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fc3f28c2af0 RCX: 000000000046abda
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fc3f28c2ab0
RBP: 0000000020000000 R08: 00007fc3f28c2af0 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000100
R13: 00007fc3f28c2ab0 R14: 0000000000000001 R15: 000000002007dd00
Modules linked in:
---[ end trace 55d1771117b77cd9 ]---
RIP: 0010:ntfs_readpage+0x1468/0x1860
Code: 0e 2c 7d ff 49 8b 9f 30 fd ff ff 31 ff 48 c1 eb 03 83 e3 01 48
89 de e8 16 2d 7d ff 48 85 db 0f 85 61 f5 ff ff e8 e8 2b 7d ff <0f> 0b
e8 e1 2b 7d ff f0 41 80 0c 24 10 e9 d9 f8 ff ff e8 d1 2b 7d
RSP: 0018:ffffc900022bfaf0 EFLAGS: 00010206
RAX: 0000000000009cb0 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90001311000 RSI: ffff8881095cb700 RDI: 0000000000000002
RBP: 0000000000000020 R08: ffffffff81c04778 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea00044bf8c0 R14: ffff88810fea4d80 R15: ffff88810fea50a0
FS:  00007fc3f28c3700(0000) GS:ffff88813dc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8c8c03e188 CR3: 0000000110e31000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Best,
Wei