Re: [syzbot] [acpi?] KASAN: slab-use-after-free Read in software_node_notify_remove

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Sun, Apr 06, 2025 at 04:37:28AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    acc4d5ff0b61 Merge tag 'net-6.15-rc0' of git://git.kernel...
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=15a807cf980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=24f9c4330e7c0609
> dashboard link: https://syzkaller.appspot.com/bug?extid=2ff22910687ee0dfd48e
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=109077b0580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13717c3f980000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/e4bfa652b34a/disk-acc4d5ff.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/3d19beb8bb92/vmlinux-acc4d5ff.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/e7298ccc6331/bzImage-acc4d5ff.xz
> 
> The issue was bisected to:
> 
> commit 9eb59204d5197b4add63968c8c5b7633631f9a5a
> Author: Yi Liu <yi.l.liu@intel.com>

Liu, have you looked at the issue? It has a good reproducibility ratio and
definitely something with your patch, but it might be still that it revealed
a lurking bug in software node implementation or driver core, however I don't
see it.


-- 
With Best Regards,
Andy Shevchenko