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linux/drivers/infiniband/ulp
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Li Zhijian 1433780759 RDMA/rtrs: Ensure 'ib_sge list' is accessible 
[ Upstream commit fb514b3139 ]

Move the declaration of the 'ib_sge list' variable outside the
'always_invalidate' block to ensure it remains accessible for use
throughout the function.

Previously, 'ib_sge list' was declared within the 'always_invalidate'
block, limiting its accessibility, then caused a
'BUG: kernel NULL pointer dereference'[1].
 ? __die_body.cold+0x19/0x27
 ? page_fault_oops+0x15a/0x2d0
 ? search_module_extables+0x19/0x60
 ? search_bpf_extables+0x5f/0x80
 ? exc_page_fault+0x7e/0x180
 ? asm_exc_page_fault+0x26/0x30
 ? memcpy_orig+0xd5/0x140
 rxe_mr_copy+0x1c3/0x200 [rdma_rxe]
 ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe]
 copy_data+0xa5/0x230 [rdma_rxe]
 rxe_requester+0xd9b/0xf70 [rdma_rxe]
 ? finish_task_switch.isra.0+0x99/0x2e0
 rxe_sender+0x13/0x40 [rdma_rxe]
 do_task+0x68/0x1e0 [rdma_rxe]
 process_one_work+0x177/0x330
 worker_thread+0x252/0x390
 ? __pfx_worker_thread+0x10/0x10

This change ensures the variable is available for subsequent operations
that require it.

[1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/

Fixes: 9cb8374804 ("RDMA/rtrs: server: main functionality")
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Link: https://patch.msgid.link/20241231013416.1290920-1-lizhijian@fujitsu.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-01-09 13:28:47 +01:00
..
ipoib RDMA/IPoIB: Fix format truncation compilation errors 2024-06-16 13:39:33 +02:00
iser IB/iser: Prevent invalidating wrong MR 2024-01-25 14:52:45 -08:00
isert Revert "IB/isert: Fix incorrect release of isert connection" 2023-09-19 12:22:48 +02:00
opa_vnic RDMA: Convert comma to semicolon 2021-01-07 13:53:41 -04:00
rtrs RDMA/rtrs: Ensure 'ib_sge list' is accessible 2025-01-09 13:28:47 +01:00
srp RDMA/srp: Do not call scsi_done() from srp_abort() 2023-10-19 23:05:32 +02:00
srpt RDMA/srpt: Do not register event handler until srpt device is fully setup 2024-03-26 18:21:32 -04:00
Makefile RDMA/rtrs: include client and server modules into kernel compilation 2020-05-17 18:57:15 -03:00