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1b2fe85f3c
The blktests/rnbd reported a null pointer dereference as following.
Similar to the mlx5, introduce a is_odp_mr() to check if the odp is
enabled in this mr.
Workqueue: rxe_wq do_work [rdma_rxe]
RIP: 0010:rxe_mr_copy+0x57/0x210 [rdma_rxe]
Code: 7c 04 48 89 f3 48 89 d5 41 89 cf 45 89 c4 0f 84 dc 00 00 00 89 ca e8 f8 f8 ff ff 85 c0 0f 85 75 01 00 00 49 8b 86 f0 00 00 00 <f6> 40 28 02 0f 85 98 01 00 00 41 8b 46 78 41 8b 8e 10 01 00 00 8d
RSP: 0018:ffffa0aac02cfcf8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff9079cd440024 RCX: 0000000000000000
RDX: 000000000000003c RSI: ffff9079cd440060 RDI: ffff9079cd665600
RBP: ffff9079c0e5e45a R08: 0000000000000000 R09: 0000000000000000
R10: 000000003c000000 R11: 0000000000225510 R12: 0000000000000000
R13: 0000000000000000 R14: ffff9079cd665600 R15: 000000000000003c
FS: 0000000000000000(0000) GS:ffff907ccfa80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000028 CR3: 0000000119498001 CR4: 00000000001726f0
Call Trace:
<TASK>
? __die_body+0x1e/0x60
? page_fault_oops+0x14f/0x4c0
? rxe_mr_copy+0x57/0x210 [rdma_rxe]
? search_bpf_extables+0x5f/0x80
? exc_page_fault+0x7e/0x180
? asm_exc_page_fault+0x26/0x30
? rxe_mr_copy+0x57/0x210 [rdma_rxe]
? rxe_mr_copy+0x48/0x210 [rdma_rxe]
? rxe_pool_get_index+0x50/0x90 [rdma_rxe]
rxe_receiver+0x1d98/0x2530 [rdma_rxe]
? psi_task_switch+0x1ff/0x250
? finish_task_switch+0x92/0x2d0
? __schedule+0xbdf/0x17c0
do_task+0x65/0x1e0 [rdma_rxe]
process_scheduled_works+0xaa/0x3f0
worker_thread+0x117/0x240
Fixes: d03fb5c6599e ("RDMA/rxe: Allow registering MRs for On-Demand Paging")
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/r/20250402032657.1762800-1-lizhijian@fujitsu.com
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Reviewed-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>