Re: [RFC PATCH 1/2] RDMA/rxe: drive UDP tunnel socket lifetime from the GID table

[yanjun.zhu]

On 7/20/26 11:15 AM, Serhat Kumral wrote:
> Thanks for the trace.

I have already provided all the details needed to reproduce this issue. 
I suggest reproducing the problem locally first, which would help avoid 
a lengthy back-and-forth discussion. It would also allow you to validate 
your own fix in the same environment before submitting it.

Zhu Yanjun

> > KASAN: null-ptr-deref in range
> > [0x0000000000000000-0x0000000000000007]
> > RIP: 0010:ip_rcv+0xeb/0x570
>
> This shows that the failure is not a deadlock, but a NULL pointer
> dereference in the IPv4 receive path.
>
> To identify the exact source line and confirm which pointer is NULL,
> could you also provide the output of:
>
>    ./scripts/faddr2line vmlinux 'ip_rcv+0xeb/0x570'
>
> My series does not modify the RXE IPv4 packet-processing functions,
> but it does change the lifetime of both IPv4 and IPv6 UDP tunnel
> sockets.
>
> Could you please run the same selftest on the same commit and config
> with this series reverted, and report whether it still crashes?