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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-01-23 22:44:12 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-01-23 22:44:12 -0500 |
| commit | 8ac092519ad91931c96d306c4bfae2c6587c325f (patch) | |
| tree | ce2a134fdbed539f535f1b5a63cd5bdbc264965b | |
| parent | 7a308bb3016f57e5be11a677d15b821536419d36 (diff) | |
| download | op-kernel-dev-8ac092519ad91931c96d306c4bfae2c6587c325f.zip op-kernel-dev-8ac092519ad91931c96d306c4bfae2c6587c325f.tar.gz | |
NFSv4.1: Fix a deadlock in layoutget
We cannot call nfs4_handle_exception() without first ensuring that the
slot has been freed. If not, we end up deadlocking with the process
waiting for recovery to complete, and recovery waiting for the slot
table to drain.
Fixes: 2e80dbe7ac51 ("NFSv4.1: Close callback races for OPEN, LAYOUTGET...")
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
| -rw-r--r-- | fs/nfs/nfs4proc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index ecc1516..59bb574 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -8490,6 +8490,7 @@ nfs4_layoutget_handle_exception(struct rpc_task *task, goto out; } + nfs4_sequence_free_slot(&lgp->res.seq_res); err = nfs4_handle_exception(server, nfs4err, exception); if (!status) { if (exception->retry) |
