linux-kernel - kernel BUG in block

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Message-ID: <CACkBjsZh7DCs+N+R=0+mnNqFZW8ck5cSgV4MpGM6ySbfenUJ+g@mail.gmail.com>
Date:   Fri, 3 Sep 2021 15:19:32 +0800
From:   Hao Sun <sunhao.th@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk
Subject: kernel BUG in block_invalidatepage

Hello,

When using Healer to fuzz the latest Linux kernel, the following crash
was triggered.

HEAD commit: 7d2a07b76933 Linux 5.14
git tree: upstream
console output:
https://drive.google.com/file/d/1Z-djyuwIRtlIKNHdLxoUnr8NqDu9zd9S/view?usp=sharing
kernel config: https://drive.google.com/file/d/1XD9WYDViQLSXN7RGwH8AGGDvP9JvOghx/view?usp=sharing

Sorry, I don't have a reproducer for this crash, hope the symbolized
report can help.
If you fix this issue, please add the following tag to the commit:
Reported-by: Hao Sun <sunhao.th@...il.com>

------------[ cut here ]------------
kernel BUG at fs/buffer.c:1510!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8695 Comm: syz-executor Not tainted 5.14.0 #25
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:block_invalidatepage+0x54d/0x660 fs/buffer.c:1510
Code: ff ff e8 c6 aa 9d ff b9 02 00 00 00 be 02 00 00 00 48 89 ef 48
c7 c2 c0 5e 20 89 e8 7d 0e 49 07 e9 29 fe ff ff e8 a3 aa 9d ff <0f> 0b
e8 9c aa 9d ff 0f 0b e8 95 aa 9d ff 48 83 eb 01 e9 83 fb ff
RSP: 0018:ffffc90000a376f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88810dd8b980
RDX: 0000000000000000 RSI: ffff88810dd8b980 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffffffff81d74ddd R09: 0000000000001000
R10: 0000000000000005 R11: fffff940000b0000 R12: ffffea0000580000
R13: 0000000000000000 R14: 0000000000200000 R15: 0000000000200000
FS:  0000000000000000(0000) GS:ffff888119f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcb1d285b7 CR3: 0000000104f5d005 CR4: 0000000000770ee0
PKRU: 55555554
Call Trace:
 do_invalidatepage mm/truncate.c:157 [inline]
 truncate_cleanup_page+0x3e4/0x620 mm/truncate.c:176
 truncate_inode_pages_range+0x26c/0x1960 mm/truncate.c:325
 kill_bdev.isra.0+0x5f/0x80 fs/block_dev.c:86
 blkdev_flush_mapping+0xdf/0x2e0 fs/block_dev.c:1243
 blkdev_put_whole+0xe8/0x110 fs/block_dev.c:1277
 blkdev_put+0x268/0x720 fs/block_dev.c:1576
 blkdev_close+0x8c/0xb0 fs/block_dev.c:1586
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xe0/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xbe4/0x2e00 kernel/exit.c:825
 do_group_exit+0x125/0x340 kernel/exit.c:922
 get_signal+0x4d5/0x25a0 kernel/signal.c:2808
 arch_do_signal_or_restart+0x2ed/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x192/0x2a0 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4739cd
Code: Unable to access opcode bytes at RIP 0x4739a3.
RSP: 002b:00007f6c0fac6218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000059c0a0 RCX: 00000000004739cd
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000059c0a8
RBP: 000000000059c0a8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000059c0ac
R13: 00007ffcdd11bbff R14: 00007ffcdd11bda0 R15: 00007f6c0fac6300
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace 4d1faf5c7a1da2c5 ]---
RIP: 0010:block_invalidatepage+0x54d/0x660 fs/buffer.c:1510
Code: ff ff e8 c6 aa 9d ff b9 02 00 00 00 be 02 00 00 00 48 89 ef 48
c7 c2 c0 5e 20 89 e8 7d 0e 49 07 e9 29 fe ff ff e8 a3 aa 9d ff <0f> 0b
e8 9c aa 9d ff 0f 0b e8 95 aa 9d ff 48 83 eb 01 e9 83 fb ff
RSP: 0018:ffffc90000a376f8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88810dd8b980
RDX: 0000000000000000 RSI: ffff88810dd8b980 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffffffff81d74ddd R09: 0000000000001000
R10: 0000000000000005 R11: fffff940000b0000 R12: ffffea0000580000
R13: 0000000000000000 R14: 0000000000200000 R15: 0000000000200000
FS:  0000000000000000(0000) GS:ffff888119f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6945606000 CR3: 000000010abb2004 CR4: 0000000000770ee0
PKRU: 55555554