5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chuck Lever <chuck.lever@xxxxxxxxxx>
[ Upstream commit 8286f8b622990194207df9ab852e0f87c60d35e9 ]
The error flow in nfsd4_copy() calls cleanup_async_copy(), which
already decrements nn->pending_async_copies.
Reported-by: Olga Kornievskaia <okorniev@xxxxxxxxxx>
Fixes: aadc3bbea163 ("NFSD: Limit the number of concurrent async COPY operations")
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/nfsd/nfs4proc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1791,10 +1791,8 @@ nfsd4_copy(struct svc_rqst *rqstp, struc
refcount_set(&async_copy->refcount, 1);
/* Arbitrary cap on number of pending async copy operations */
if (atomic_inc_return(&nn->pending_async_copies) >
- (int)rqstp->rq_pool->sp_nrthreads) {
- atomic_dec(&nn->pending_async_copies);
+ (int)rqstp->rq_pool->sp_nrthreads)
goto out_err;
- }
async_copy->cp_src = kmalloc(sizeof(*async_copy->cp_src), GFP_KERNEL);
if (!async_copy->cp_src)
goto out_err;
