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SUNRPC: Fix null pointer dereference in svc_rqst_free()

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[ Upstream commit b9f83ffaa0c096b4c832a43964fe6bff3acffe10 ]

When alloc_pages_node() returns null in svc_rqst_alloc(), the
null rq_scratch_page pointer will be dereferenced when calling
put_page() in svc_rqst_free(). Fix it by adding a null check.

Addresses-Coverity: ("Dereference after null check")
Fixes: 5191955d6fc6 ("SUNRPC: Prepare for xdr_stream-style decoding on the server-side")
Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yunjian Wang 2024-06-26 14:27:41 -04:00 • committed by Ksawlii
parent e6e91f4610
commit 64a9cf7edf
1 changed files with 2 additions and 1 deletions
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3
net/sunrpc/svc.c
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@ -845,7 +845,8 @@ void
svc_rqst_free(struct svc_rqst *rqstp)
{
svc_release_buffer(rqstp);
put_page(rqstp->rq_scratch_page);
if (rqstp->rq_scratch_page)
put_page(rqstp->rq_scratch_page);
kfree(rqstp->rq_resp);
kfree(rqstp->rq_argp);
kfree(rqstp->rq_auth_data);