Ye Bin 94d2d6d398 svcrdma: fix miss destroy percpu_counter in svc_rdma_proc_init() ... [ Upstream commit ce89e742a4 ] There's issue as follows: RPC: Registered rdma transport module. RPC: Registered rdma backchannel transport module. RPC: Unregistered rdma transport module. RPC: Unregistered rdma backchannel transport module. BUG: unable to handle page fault for address: fffffbfff80c609a PGD 123fee067 P4D 123fee067 PUD 123fea067 PMD 10c624067 PTE 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI RIP: 0010:percpu_counter_destroy_many+0xf7/0x2a0 Call Trace: <TASK> __die+0x1f/0x70 page_fault_oops+0x2cd/0x860 spurious_kernel_fault+0x36/0x450 do_kern_addr_fault+0xca/0x100 exc_page_fault+0x128/0x150 asm_exc_page_fault+0x26/0x30 percpu_counter_destroy_many+0xf7/0x2a0 mmdrop+0x209/0x350 finish_task_switch.isra.0+0x481/0x840 schedule_tail+0xe/0xd0 ret_from_fork+0x23/0x80 ret_from_fork_asm+0x1a/0x30 </TASK> If register_sysctl() return NULL, then svc_rdma_proc_cleanup() will not destroy the percpu counters which init in svc_rdma_proc_init(). If CONFIG_HOTPLUG_CPU is enabled, residual nodes may be in the 'percpu_counters' list. The above issue may occur once the module is removed. If the CONFIG_HOTPLUG_CPU configuration is not enabled, memory leakage occurs. To solve above issue just destroy all percpu counters when register_sysctl() return NULL. Fixes: 1e7e557316 ("svcrdma: Restore read and write stats") Fixes: 22df5a2246 ("svcrdma: Convert rdma_stat_sq_starve to a per-CPU counter") Fixes: df971cd853 ("svcrdma: Convert rdma_stat_recv to a per-CPU counter") Signed-off-by: Ye Bin <yebin10@huawei.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-12-14 19:53:47 +01:00
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backchannel.c	xprtrdma: Clean up synopsis of rpcrdma_req_create()	2022-10-05 15:47:16 -04:00
frwr_ops.c	xprtrdma: Fix rpcrdma_reqs_reset()	2024-08-03 08:49:15 +02:00
Makefile	svcrdma: Add a "parsed chunk list" data structure	2020-11-30 13:00:22 -05:00
module.c	SUNRPC: xprt_load_transport() needs to support the netid "rdma6"	2020-12-02 14:05:52 -05:00
rpc_rdma.c	xprtrdma: treat all calls not a bcall when bc_serv is NULL	2022-05-31 17:09:30 -04:00
svc_rdma_backchannel.c	svcrdma: Clean up RPCRDMA_DEF_GFP	2022-10-05 15:47:16 -04:00
svc_rdma_pcl.c	svcrdma: Add a "parsed chunk list" data structure	2020-11-30 13:00:22 -05:00
svc_rdma_recvfrom.c	svcrdma: Address an integer overflow	2024-12-14 19:53:46 +01:00
svc_rdma_rw.c	SUNRPC: Trap RDMA segment overflows	2022-06-02 13:05:58 -04:00
svc_rdma_sendto.c	svcrdma: Split the svcrdma_wc_send() tracepoint	2021-10-04 15:40:15 -04:00
svc_rdma_transport.c	SUNRPC: always free ctxt when freeing deferred request	2023-05-24 17:32:45 +01:00
svc_rdma.c	svcrdma: fix miss destroy percpu_counter in svc_rdma_proc_init()	2024-12-14 19:53:47 +01:00
transport.c	SUNRPC: Replace the use of the xprtiod WQ in rpcrdma	2022-10-05 15:47:16 -04:00
verbs.c	xprtrdma: Fix rpcrdma_reqs_reset()	2024-08-03 08:49:15 +02:00
xprt_rdma.h	xprtrdma: MR-related memory allocation should be allowed to fail	2022-10-05 15:47:16 -04:00