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nfsd/callback: skip the callback tag 

The callback tag is NULL, and hdr->nops is unused too right now, but.
But if we were to ever test with a nonzero callback tag, nops will get a
bad value.

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Kinglong Mee 2017-02-05 09:57:37 +08:00 committed by J. Bruce Fields
parent f7d1ddbe76
commit e86a40bc73
1 changed files with 1 additions and 0 deletions
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fs/nfsd/nfs4callback.c
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@ -303,6 +303,7 @@ static int decode_cb_compound4res(struct xdr_stream *xdr,
p = xdr_inline_decode(xdr, length + 4); p = xdr_inline_decode(xdr, length + 4);
if (unlikely(p == NULL)) if (unlikely(p == NULL))
goto out_overflow; goto out_overflow;
p += XDR_QUADLEN(length);
hdr->nops = be32_to_cpup(p); hdr->nops = be32_to_cpup(p);
return 0; return 0;
out_overflow: out_overflow: