linux-kernel - WARNING in __kernel

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Message-ID: <CACkBjsbPsmUiC7NFgOZcVcwPA7RLpiCFkgEA=LsnvcFsWFG34Q@mail.gmail.com>
Date:   Wed, 6 Oct 2021 17:33:47 +0800
From:   Hao Sun <sunhao.th@...il.com>
To:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk
Subject: WARNING in __kernel_read

Hello,

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

HEAD commit: 0513e464f900 Merge tag 'perf-tools-fixes-for-v5.15-2021-09-27'
git tree: upstream
console output:
https://drive.google.com/file/d/1RomE2Ls4uFB-AfgRtQr6739q4npqS-_Y/view?usp=sharing
kernel config: https://drive.google.com/file/d/1Jqhc4DpCVE8X7d-XBdQnrMoQzifTG5ho/view?usp=sharing
C reproducer: https://drive.google.com/file/d/1RzAsyIZzw5X_m340nY9fu4KWjGdG98pv/view?usp=sharing
Syzlang reproducer:
https://drive.google.com/file/d/1QqdmE15ktTdJIQK9s6u-btC5YuajI9XH/view?usp=sharing

If you fix this issue, please add the following tag to the commit:
Reported-by: Hao Sun <sunhao.th@...il.com>

------------[ cut here ]------------
WARNING: CPU: 1 PID: 28082 at fs/read_write.c:429
__kernel_read+0x3bb/0x410 fs/read_write.c:429
Modules linked in:
CPU: 1 PID: 28082 Comm: syz-executor Not tainted 5.15.0-rc3+ #21
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RIP: 0010:__kernel_read+0x3bb/0x410 fs/read_write.c:429
Code: 8b 04 25 40 70 01 00 8b 88 60 05 00 00 4c 8d 80 c8 07 00 00 e8
88 c7 c6 02 48 c7 c5 ea ff ff ff e9 6a fe ff ff e8 65 cf dd ff <0f> 0b
48 c7 c5 ea ff ff ff e9 57 fe ff ff e8 52 cf dd ff b9 01 00
RSP: 0018:ffffc900025e7cf8 EFLAGS: 00010216
RAX: 00000000000081cb RBX: ffff888109c16c00 RCX: ffffc90002c55000
RDX: 0000000000040000 RSI: ffffffff8159c1fb RDI: ffff888109c16c00
RBP: 000000004808801c R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900025e7d40 R11: 0000000000000000 R12: ffffc9000f315000
R13: ffffc900025e7df8 R14: 0000000000206590 R15: ffffc9000f315000
FS:  00007f55dbd06700(0000) GS:ffff88813dc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000003 CR3: 000000001a3ac000 CR4: 0000000000752ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000003
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 kernel_read+0x47/0x60 fs/read_write.c:461
 kernel_read_file+0x20a/0x370 fs/kernel_read_file.c:93
 kernel_read_file_from_fd+0x55/0x90 fs/kernel_read_file.c:184
 __do_sys_finit_module+0x89/0x110 kernel/module.c:4180
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x34/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46ae99
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f55dbd05c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 000000000078c0a0 RCX: 000000000046ae99
RDX: 0000000000000003 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00000000004e4809 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078c0a0
R13: 0000000000000000 R14: 000000000078c0a0 R15: 00007ffeee82e7a0