WSL2-Linux-Kernel/net/sunrpc/xprtrdma
Chuck Lever 23cf1ee1f1 svcrdma: Fix leak of svc_rdma_recv_ctxt objects
Utilize the xpo_release_rqst transport method to ensure that each
rqstp's svc_rdma_recv_ctxt object is released even when the server
cannot return a Reply for that rqstp.

Without this fix, each RPC whose Reply cannot be sent leaks one
svc_rdma_recv_ctxt. This is a 2.5KB structure, a 4KB DMA-mapped
Receive buffer, and any pages that might be part of the Reply
message.

The leak is infrequent unless the network fabric is unreliable or
Kerberos is in use, as GSS sequence window overruns, which result
in connection loss, are more common on fast transports.

Fixes: 3a88092ee3 ("svcrdma: Preserve Receive buffer until svc_rdma_sendto")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2020-04-17 12:40:38 -04:00
..
Makefile xprtrdma: Remove support for FMR memory registration 2019-01-02 12:05:17 -05:00
backchannel.c xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt 2020-03-27 10:47:25 -04:00
frwr_ops.c xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt 2020-03-27 10:47:25 -04:00
module.c NFS client updates for Linux 4.18 2018-06-12 10:09:03 -07:00
rpc_rdma.c NFS client updates for Linux 5.7 2020-04-07 13:51:39 -07:00
svc_rdma.c svcrdma: Remove svc_rdma_wq 2019-08-19 10:59:28 -04:00
svc_rdma_backchannel.c SUNRPC: Fix backchannel RPC soft lockups 2020-04-17 12:40:31 -04:00
svc_rdma_recvfrom.c svcrdma: Fix leak of svc_rdma_recv_ctxt objects 2020-04-17 12:40:38 -04:00
svc_rdma_rw.c svcrdma: Fix trace point use-after-free race 2020-04-17 12:40:38 -04:00
svc_rdma_sendto.c svcrdma: Fix leak of svc_rdma_recv_ctxt objects 2020-04-17 12:40:38 -04:00
svc_rdma_transport.c svcrdma: Fix leak of svc_rdma_recv_ctxt objects 2020-04-17 12:40:38 -04:00
transport.c xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt 2020-03-27 10:47:25 -04:00
verbs.c xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt 2020-03-27 10:47:25 -04:00
xprt_rdma.h xprtrdma: kmalloc rpcrdma_ep separate from rpcrdma_xprt 2020-03-27 10:47:25 -04:00