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NFSD: fix missing refcount in nfsd4_copy by nfsd4_do_async_copy 

Need to initialize nfsd4_copy's refcount to 1 to avoid use-after-free
warning when nfs4_put_copy is called from nfsd4_cb_offload_release.

Fixes: ce0887ac96 ("NFSD add nfs4 inter ssc to nfsd4_copy")
Signed-off-by: Dai Ngo <dai.ngo@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
zero-sugar-mainline-defconfig
Dai Ngo 2020-10-29 15:07:16 -04:00 committed by J. Bruce Fields
parent 36e1e5ba90
commit 49a3613273
1 changed files with 1 additions and 0 deletions
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fs/nfsd/nfs4proc.c
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@ -1486,6 +1486,7 @@ do_callback:
cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
if (!cb_copy)
goto out;
refcount_set(&cb_copy->refcount, 1);
memcpy(&cb_copy->cp_res, &copy->cp_res, sizeof(copy->cp_res));
cb_copy->cp_clp = copy->cp_clp;
cb_copy->nfserr = copy->nfserr;