On Sat, Sep 18, 2021 at 10:17:26AM +0800, Hao Sun wrote: > Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> 于2021年9月18日周六 上午10:02写道： > > > > On Sat, Sep 18, 2021 at 09:56:52AM +0800, Hao Sun wrote: > > > Hi Alan, > > > > > > Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> 于2021年9月13日周一 下午9:55写道： > > > > > > > > On Mon, Sep 13, 2021 at 11:13:15AM +0800, Hao Sun wrote: > > > > > Hello, > > > > > > > > > > When using Healer to fuzz the Linux kernel, the following crash was triggered. > > > > > > > > > > HEAD commit: ac08b1c68d1b Merge tag 'pci-v5.15-changes' > > > > > git tree: upstream > > > > > console output: > > > > > https://drive.google.com/file/d/1ZeDIMe-DoY3fB32j2p5ifgpq-Lc5N74I/view?usp=sharing > > > > > kernel config: https://drive.google.com/file/d/1qrJUXD8ZIeAkg-xojzDpp04v9MtQ8RR6/view?usp=sharing > > > > > Syzlang reproducer: > > > > > https://drive.google.com/file/d/1tZe8VmXfxoPqlNpzpGOd-e5WCSWgbkxB/view?usp=sharing > > > > > Similar report: > > > > > https://groups.google.com/g/syzkaller-bugs/c/zX55CUzjBOY/m/uf91r0XqAgAJ > > > > > > > > > > Sorry, I don't have a C reproducer for this crash but have a Syzlang > > > > > reproducer. Also, hope the symbolized report can help. > > > > > Here are the instructions on how to execute Syzlang prog: > > > > > https://github.com/google/syzkaller/blob/master/docs/executing_syzkaller_programs.md > > > > > > > > > > If you fix this issue, please add the following tag to the commit: > > > > > Reported-by: Hao Sun <sunhao.th@xxxxxxxxx> > > > > > > > > There's not much hope of finding the cause of a problem like this > > > > without seeing the kernel log. > > > > > > > > > > Healer found another Syzlang prog to reproduce this task hang: > > > https://paste.ubuntu.com/p/HCNYbKJYtx/ > > > > > > Also here is a very simple script to execute the reproducer: > > > https://paste.ubuntu.com/p/ZTGmvFSP6d/ > > > > > > The `syz-execprog` and `syz-executor` are needed, so please build > > > Syzkaller first before running the script. > > > Hope this can help to find the root cause of the problem. > > > > I don't have time to install and figure out how to use Healer and > > Syzkaller. But if you run the reproducer and post the kernel log, > > I'll take a look at it. > > > > Just executed the reproducer, here is the full log: > https://paste.ubuntu.com/p/x43SqQy8PX/ The log indicates that the problem is related to the vhci-hcd driver somehow. I don't know why those "Module has invalid ELF structures" errors keep appearing, starting in line 1946 of the log. Alan Stern
