linux-kernel - [syzbot] [nfs?] KFENCE: memory corruption in do_handle

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Message-ID: <00000000000065ed60061591a173@google.com>
Date: Mon, 08 Apr 2024 01:31:22 -0700
From: syzbot <syzbot+454fe737909d37a0e5fe@...kaller.appspotmail.com>
To: amir73il@...il.com, brauner@...nel.org, chuck.lever@...cle.com, 
	jack@...e.cz, jlayton@...nel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: [syzbot] [nfs?] KFENCE: memory corruption in do_handle_open

Hello,

syzbot found the following issue on:

HEAD commit:    727900b675b7 Add linux-next specific files for 20240403
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=15bf53c5180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=afcaf46d374cec8c
dashboard link: https://syzkaller.appspot.com/bug?extid=454fe737909d37a0e5fe
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f8fb4daa7a83/disk-727900b6.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d2a6994aee53/vmlinux-727900b6.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6759e5411c39/bzImage-727900b6.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+454fe737909d37a0e5fe@...kaller.appspotmail.com

==================================================================
BUG: KFENCE: memory corruption in handle_to_path fs/fhandle.c:213 [inline]
BUG: KFENCE: memory corruption in do_handle_open+0x4be/0x660 fs/fhandle.c:226

Corrupted memory at 0xffff88823bdccff8 [ 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 ] (in kfence-#229):
 handle_to_path fs/fhandle.c:213 [inline]
 do_handle_open+0x4be/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

kfence-#229: 0xffff88823bdccfe0-0xffff88823bdccff7, size=24, cache=kmalloc-32

allocated by task 5382 on cpu 1 at 75.554801s:
 kmalloc_noprof include/linux/slab.h:664 [inline]
 handle_to_path fs/fhandle.c:195 [inline]
 do_handle_open+0x162/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

freed by task 5382 on cpu 1 at 75.554827s:
 handle_to_path fs/fhandle.c:213 [inline]
 do_handle_open+0x4be/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a

CPU: 1 PID: 5382 Comm: syz-executor.0 Not tainted 6.9.0-rc2-next-20240403-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
==================================================================


---
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