On Tue, 31 Dec 2024 09:34:16 +0800, Li Zhijian wrote:
> 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
>
> [...]
Applied, thanks!
[1/1] RDMA/rtrs: server: Ensure 'ib_sge list' is accessible
https://git.kernel.org/rdma/rdma/c/bc0f6099b7c272
Best regards,
--
Leon Romanovsky <leon@xxxxxxxxxx>
