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| author |   Daniel Kobras <kobras@puzzle-itc.de> | 2021-02-27 00:04:37 +0100 |
|---|---|---|
| committer |   Chuck Lever <chuck.lever@oracle.com> | 2021-03-06 16:41:49 -0500 |
| commit | f1442d6349a2e7bb7a6134791bdc26cb776c79af (patch) | |
| tree | 30a600c0850e8a14bb5c038a3d5c3e8b217ff9d0 /net/sunrpc/svc.c | |
| parent | NFSD: Repair misuse of sv_lock in 5.10.16-rt30. (diff) | |
| download | linux-dev-f1442d6349a2e7bb7a6134791bdc26cb776c79af.tar.xz linux-dev-f1442d6349a2e7bb7a6134791bdc26cb776c79af.zip | |
sunrpc: fix refcount leak for rpc auth modules
If an auth module's accept op returns SVC_CLOSE, svc_process_common()
enters a call path that does not call svc_authorise() before leaving the
function, and thus leaks a reference on the auth module's refcount. Hence,
make sure calls to svc_authenticate() and svc_authorise() are paired for
all call paths, to make sure rpc auth modules can be unloaded.
Signed-off-by: Daniel Kobras <kobras@puzzle-itc.de>
Fixes: 4d712ef1db05 ("svcauth_gss: Close connection when dropping an incoming message")
Link: https://lore.kernel.org/linux-nfs/3F1B347F-B809-478F-A1E9-0BE98E22B0F0@oracle.com/T/#t
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to '')
| -rw-r--r-- | net/sunrpc/svc.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 61fb8a18552c..d76dc9d95d16 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -1413,7 +1413,7 @@ svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv) sendit: if (svc_authorise(rqstp)) - goto close; + goto close_xprt; return 1; /* Caller can now send it */ release_dropit: @@ -1425,6 +1425,8 @@ release_dropit: return 0; close: + svc_authorise(rqstp); +close_xprt: if (rqstp->rq_xprt && test_bit(XPT_TEMP, &rqstp->rq_xprt->xpt_flags)) svc_close_xprt(rqstp->rq_xprt); dprintk("svc: svc_process close\n"); @@ -1433,7 +1435,7 @@ release_dropit: err_short_len: svc_printk(rqstp, "short len %zd, dropping request\n", argv->iov_len); - goto close; + goto close_xprt; err_bad_rpc: serv->sv_stats->rpcbadfmt++; |