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Mon, 20 Jul 2026 11:31:14 -0700 (PDT) From: Serhat Kumral To: Zhu Yanjun , Zhu Yanjun Cc: Jason Gunthorpe , Leon Romanovsky , David Ahern , linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, syzbot+8c9eede336e3a843750e@syzkaller.appspotmail.com Subject: Re: [RFC PATCH 1/2] RDMA/rxe: drive UDP tunnel socket lifetime from the GID table Date: Mon, 20 Jul 2026 21:15:51 +0300 Message-ID: <20260720181551.30322-1-serhatkumral1@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <19670ac6-ebab-4074-ab4f-3db06e1db291@linux.dev> References: <19670ac6-ebab-4074-ab4f-3db06e1db291@linux.dev> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Thanks for the trace. > 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?