diff options
| author | Shiraz Saleem <shiraz.saleem@intel.com> | 2023-07-11 12:52:53 -0500 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2023-07-17 08:02:00 +0300 |
| commit | f0842bb3d38863777e3454da5653d80b5fde6321 (patch) | |
| tree | 71bdd76e8e1796d5749f84d5ef025af40ad0ce78 /drivers/infiniband/hw/irdma/main.h | |
| parent | f2c3037811381f9149243828c7eb9a1631df9f9c (diff) | |
RDMA/irdma: Fix data race on CQP request done
KCSAN detects a data race on cqp_request->request_done memory location
which is accessed locklessly in irdma_handle_cqp_op while being
updated in irdma_cqp_ce_handler.
Annotate lockless intent with READ_ONCE/WRITE_ONCE to avoid any
compiler optimizations like load fusing and/or KCSAN warning.
[222808.417128] BUG: KCSAN: data-race in irdma_cqp_ce_handler [irdma] / irdma_wait_event [irdma]
[222808.417532] write to 0xffff8e44107019dc of 1 bytes by task 29658 on cpu 5:
[222808.417610] irdma_cqp_ce_handler+0x21e/0x270 [irdma]
[222808.417725] cqp_compl_worker+0x1b/0x20 [irdma]
[222808.417827] process_one_work+0x4d1/0xa40
[222808.417835] worker_thread+0x319/0x700
[222808.417842] kthread+0x180/0x1b0
[222808.417852] ret_from_fork+0x22/0x30
[222808.417918] read to 0xffff8e44107019dc of 1 bytes by task 29688 on cpu 1:
[222808.417995] irdma_wait_event+0x1e2/0x2c0 [irdma]
[222808.418099] irdma_handle_cqp_op+0xae/0x170 [irdma]
[222808.418202] irdma_cqp_cq_destroy_cmd+0x70/0x90 [irdma]
[222808.418308] irdma_puda_dele_rsrc+0x46d/0x4d0 [irdma]
[222808.418411] irdma_rt_deinit_hw+0x179/0x1d0 [irdma]
[222808.418514] irdma_ib_dealloc_device+0x11/0x40 [irdma]
[222808.418618] ib_dealloc_device+0x2a/0x120 [ib_core]
[222808.418823] __ib_unregister_device+0xde/0x100 [ib_core]
[222808.418981] ib_unregister_device+0x22/0x40 [ib_core]
[222808.419142] irdma_ib_unregister_device+0x70/0x90 [irdma]
[222808.419248] i40iw_close+0x6f/0xc0 [irdma]
[222808.419352] i40e_client_device_unregister+0x14a/0x180 [i40e]
[222808.419450] i40iw_remove+0x21/0x30 [irdma]
[222808.419554] auxiliary_bus_remove+0x31/0x50
[222808.419563] device_remove+0x69/0xb0
[222808.419572] device_release_driver_internal+0x293/0x360
[222808.419582] driver_detach+0x7c/0xf0
[222808.419592] bus_remove_driver+0x8c/0x150
[222808.419600] driver_unregister+0x45/0x70
[222808.419610] auxiliary_driver_unregister+0x16/0x30
[222808.419618] irdma_exit_module+0x18/0x1e [irdma]
[222808.419733] __do_sys_delete_module.constprop.0+0x1e2/0x310
[222808.419745] __x64_sys_delete_module+0x1b/0x30
[222808.419755] do_syscall_64+0x39/0x90
[222808.419763] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[222808.419829] value changed: 0x01 -> 0x03
Fixes: 915cc7ac0f8e ("RDMA/irdma: Add miscellaneous utility definitions")
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Link: https://lore.kernel.org/r/20230711175253.1289-4-shiraz.saleem@intel.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/hw/irdma/main.h')
| -rw-r--r-- | drivers/infiniband/hw/irdma/main.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/irdma/main.h b/drivers/infiniband/hw/irdma/main.h index def6dd58dcd4..2323962cdeac 100644 --- a/drivers/infiniband/hw/irdma/main.h +++ b/drivers/infiniband/hw/irdma/main.h @@ -161,8 +161,8 @@ struct irdma_cqp_request { void (*callback_fcn)(struct irdma_cqp_request *cqp_request); void *param; struct irdma_cqp_compl_info compl_info; + bool request_done; /* READ/WRITE_ONCE macros operate on it */ bool waiting:1; - bool request_done:1; bool dynamic:1; }; |