When a kernel ULP requests the rdmavt to create a completion queue, it
allocated the queue and set cq->kqueue to point to it. However, when the
completion queue is destroyed, cq->queue is freed instead, leading to a
memory leak:
https://lore.kernel.org/r/
215235485.
15264050.
1583334487658.JavaMail.zimbra@redhat.com
unreferenced object 0xffffc90006639000 (size 12288):
comm "kworker/u128:0", pid 8, jiffies
4295777598 (age 589.085s)
hex dump (first 32 bytes):
4d 00 00 00 4d 00 00 00 00 c0 08 ac 8b 88 ff ff M...M...........
00 00 00 00 80 00 00 00 00 00 00 00 10 00 00 00 ................
backtrace:
[<
0000000035a3d625>] __vmalloc_node_range+0x361/0x720
[<
000000002942ce4f>] __vmalloc_node.constprop.30+0x63/0xb0
[<
00000000f228f784>] rvt_create_cq+0x98a/0xd80 [rdmavt]
[<
00000000b84aec66>] __ib_alloc_cq_user+0x281/0x1260 [ib_core]
[<
00000000ef3764be>] nvme_rdma_cm_handler+0xdb7/0x1b80 [nvme_rdma]
[<
00000000936b401c>] cma_cm_event_handler+0xb7/0x550 [rdma_cm]
[<
00000000d9c40b7b>] addr_handler+0x195/0x310 [rdma_cm]
[<
00000000c7398a03>] process_one_req+0xdd/0x600 [ib_core]
[<
000000004d29675b>] process_one_work+0x920/0x1740
[<
00000000efedcdb5>] worker_thread+0x87/0xb40
[<
000000005688b340>] kthread+0x327/0x3f0
[<
0000000043a168d6>] ret_from_fork+0x3a/0x50
This patch fixes the issue by freeing cq->kqueue instead.
Fixes:
239b0e52d8aa ("IB/hfi1: Move rvt_cq_wc struct into uapi directory")
Link: https://lore.kernel.org/r/20200313123957.14343.43879.stgit@awfm-01.aw.intel.com
Cc: <stable@vger.kernel.org> # 5.4.x
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>