Daisuke Matsuda 10af303192 RDMA/rxe: Fix spinlock recursion deadlock on requester ... The following deadlock is observed: Call Trace: <IRQ> _raw_spin_lock_bh+0x29/0x30 check_type_state.constprop.0+0x4e/0xc0 [rdma_rxe] rxe_rcv+0x173/0x3d0 [rdma_rxe] rxe_udp_encap_recv+0x69/0xd0 [rdma_rxe] ? __pfx_rxe_udp_encap_recv+0x10/0x10 [rdma_rxe] udp_queue_rcv_one_skb+0x258/0x520 udp_unicast_rcv_skb+0x75/0x90 __udp4_lib_rcv+0x364/0x5c0 ip_protocol_deliver_rcu+0xa7/0x160 ip_local_deliver_finish+0x73/0xa0 ip_sublist_rcv_finish+0x80/0x90 ip_sublist_rcv+0x191/0x220 ip_list_rcv+0x132/0x160 __netif_receive_skb_list_core+0x297/0x2c0 netif_receive_skb_list_internal+0x1c5/0x300 napi_complete_done+0x6f/0x1b0 virtnet_poll+0x1f4/0x2d0 [virtio_net] __napi_poll+0x2c/0x1b0 net_rx_action+0x293/0x350 ? __napi_schedule+0x79/0x90 __do_softirq+0xcb/0x2ab __irq_exit_rcu+0xb9/0xf0 common_interrupt+0x80/0xa0 </IRQ> <TASK> asm_common_interrupt+0x22/0x40 RIP: 0010:_raw_spin_lock+0x17/0x30 rxe_requester+0xe4/0x8f0 [rdma_rxe] ? xas_load+0x9/0xa0 ? xa_load+0x70/0xb0 do_task+0x64/0x1f0 [rdma_rxe] rxe_post_send+0x54/0x110 [rdma_rxe] ib_uverbs_post_send+0x5f8/0x680 [ib_uverbs] ? netif_receive_skb_list_internal+0x1e3/0x300 ib_uverbs_write+0x3c8/0x500 [ib_uverbs] vfs_write+0xc5/0x3b0 ksys_write+0xab/0xe0 ? syscall_trace_enter.constprop.0+0x126/0x1a0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc </TASK> The deadlock is easily reproducible with perftest. Fix it by disabling softirq when acquiring the lock in process context. Fixes: f605f26ea1 ("RDMA/rxe: Protect QP state with qp->state_lock") Link: https://lore.kernel.org/r/20230418090642.1849358-1-matsuda-daisuke@fujitsu.com Signed-off-by: Daisuke Matsuda <matsuda-daisuke@fujitsu.com> Acked-by: Zhu Yanjun <zyjzyj2000@gmail.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>		2023-04-21 12:33:00 -03:00
..
Kconfig
Makefile
rxe_av.c
rxe_comp.c	RDMA/rxe: Protect QP state with qp->state_lock	2023-04-17 16:34:04 -03:00
rxe_cq.c
rxe_hdr.h
rxe_hw_counters.c
rxe_hw_counters.h
rxe_icrc.c
rxe_loc.h
rxe_mcast.c
rxe_mmap.c
rxe_mr.c	RDMA: Add ib_virt_dma_to_page()	2023-04-16 11:08:07 +03:00
rxe_mw.c
rxe_net.c	RDMA/rxe: Protect QP state with qp->state_lock	2023-04-17 16:34:04 -03:00
rxe_net.h
rxe_opcode.c
rxe_opcode.h
rxe_param.h
rxe_pool.c
rxe_pool.h
rxe_qp.c	RDMA/rxe: Protect QP state with qp->state_lock	2023-04-17 16:34:04 -03:00
rxe_queue.c
rxe_queue.h
rxe_recv.c	RDMA/rxe: Protect QP state with qp->state_lock	2023-04-17 16:34:04 -03:00
rxe_req.c	RDMA/rxe: Fix spinlock recursion deadlock on requester	2023-04-21 12:33:00 -03:00
rxe_resp.c	RDMA/rxe: Protect QP state with qp->state_lock	2023-04-17 16:34:04 -03:00
rxe_srq.c
rxe_task.c
rxe_task.h
rxe_verbs.c	RDMA/rxe: Protect QP state with qp->state_lock	2023-04-17 16:34:04 -03:00
rxe_verbs.h	RDMA/rxe: Remove qp->req.state	2023-04-17 16:01:44 -03:00
rxe.c
rxe.h