-----"Bart Van Assche" <bvanassche@xxxxxxx> wrote: -----
>To: linux-rdma@xxxxxxxxxxxxxxx, "Jason Gunthorpe" <jgg@xxxxxxxxxx>
>From: "Bart Van Assche" <bvanassche@xxxxxxx>
>Date: 09/15/2021 06:54AM
>Subject: [EXTERNAL] v5.15-rc1 issue with the soft-iWARP driver
>
>Hi,
>
>If I run test srp/015 from the blktests suite then the following
>appears
>in the kernel log:
>
>==================================================================
>BUG: KASAN: null-ptr-deref in __list_del_entry_valid+0x4d/0xe0
>Read of size 8 at addr 0000000000000000 by task kworker/u16:3/161
>
>CPU: 5 PID: 161 Comm: kworker/u16:3 Not tainted 5.15.0-rc1-dbg+ #2
>Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
>rel-1.14.0-0-g155821a-rebuilt.opensuse.org 04/01/2014
>Workqueue: iw_cm_wq cm_work_handler [iw_cm]
>Call Trace:
> show_stack+0x52/0x58
> dump_stack_lvl+0x5b/0x82
> kasan_report.cold+0x52/0x57
> __asan_load8+0x69/0x90
> __list_del_entry_valid+0x4d/0xe0
> _cma_cancel_listens+0x49/0x230 [rdma_cm]
> _destroy_id+0x4e/0x420 [rdma_cm]
> destroy_id_handler_unlock+0xc4/0x200 [rdma_cm]
> iw_conn_req_handler+0x335/0x370 [rdma_cm]
> cm_conn_req_handler+0x546/0x7d0 [iw_cm]
> cm_work_handler+0x419/0x480 [iw_cm]
> process_one_work+0x59d/0xb00
> worker_thread+0x8f/0x5c0
> kthread+0x1fc/0x230
> ret_from_fork+0x1f/0x30
>==================================================================
>
>I think this is a regression. This happened with commit a17a1faf5d3e
>("RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure").
>
So far I could not reproduce it with that patch (tried to get better
understanding with siw debugging enabled). That doesn't mean much.
But I do see issues with rxe if running the complete srp set from
blktest, which seem to be unrelated. I'll send an extra message.
Many thanks,
Bernard.
