Re: [PATCH] bpf: Replace BUG_ON when fp_old is NULL

[Daniel Borkmann <daniel@xxxxxxxxxxxxx>]

On 12/15/19 11:08 PM, Yonghong Song wrote:
> On 12/15/19 7:44 AM, Aditya Pakki wrote:
> > If fp_old is NULL in bpf_prog_realloc, the program does an assertion
> > and crashes. However, we can continue execution by returning NULL to
> > the upper callers. The patch fixes this issue.
>
> Could you share how to reproduce the assertion and crash? I would
> like to understand the problem first before making changes in the code.
> Thanks!

Fully agree, Aditya, please elaborate if you have seen a crash!