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SUNRPC: Fix the minimal size for reply buffer allocation

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We must at minimum allocate enough memory to be able to see any auth
errors in the reply from the server.

Fixes: 2c94b8eca1 ("SUNRPC: Use au_rslack when computing reply...")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2019-03-15 12:55:59 -04:00
parent 9734ad57b0
commit 513149607d
1 changed files with 6 additions and 1 deletions
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7
net/sunrpc/clnt.c
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@ -1730,7 +1730,12 @@ call_allocate(struct rpc_task *task)
req->rq_callsize = RPC_CALLHDRSIZE + (auth->au_cslack << 1) +
proc->p_arglen;
req->rq_callsize <<= 2;
req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + proc->p_replen;
/*
* Note: the reply buffer must at minimum allocate enough space
* for the 'struct accepted_reply' from RFC5531.
*/
req->rq_rcvsize = RPC_REPHDRSIZE + auth->au_rslack + \
max_t(size_t, proc->p_replen, 2);
req->rq_rcvsize <<= 2;
status = xprt->ops->buf_alloc(task);