linux-kernel - Re: WARNING: kernel stack regs has bad "bp" value

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAGXGE_J6zQip-4jSMghKXSHnE2dASLF1maw9Ev-4EwyfJL99Mg@mail.gmail.com>
Date: Tue, 24 Dec 2024 11:17:30 +0800
From: wzs <wangzhengshu39@...il.com>
To: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>, Naresh Kamboju <naresh.kamboju@...aro.org>, 
	linux-kernel@...r.kernel.org, linux-snps-arc@...ts.infradead.org, 
	linux-arm-kernel@...ts.infradead.org, loongarch@...ts.linux.dev, 
	linux-parisc@...r.kernel.org, x86@...nel.org
Subject: Re: WARNING: kernel stack regs has bad "bp" value

Thank you for your attention to this issue.
First,i checked the contents of  /proc/cmdline and /etc/default/grub ,
but i couldn't find any information related to unwind_debug.
Secondly,i followed your suggestion and used objdump for
disassembly,which i hope will be helpful for you.

The contents of  /proc/cmdline and /etc/default/grub :
wzs@...-virtual-machine:~/download/test$ cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-6.12.0
root=UUID=80346aa9-0758-443e-bff2-ce432265e5e8 ro quiet splash
wzs@...-virtual-machine:~/download/test$ cat /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'
GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 6.12.0"
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""
# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console
# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true
# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"
# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

The output of objdump -r --disassemble=vmw_send_msg vmwgfx.ko is as follows.
Since the content is quite long ,i need to split two parts for saving.
Similarly, I have also saved it in the attachment.
console output 1 : https://pastebin.com/mBi6fTdM
cousole output 2 : https://pastebin.com/89SMLgCy

View attachment "vmw_send_msg_disassembly.txt" of type "text/plain" (646230 bytes)