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SUNRPC: Replace checksum construction in svcauth_gss_wrap_integ()

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Replace finicky logic: Instead of trying to find scratch space in
the response buffer, use the scratch buffer from struct
gss_svc_data.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever 2023-01-08 11:28:49 -05:00
parent 15d8f80891
commit d91f0323a0
1 changed files with 2 additions and 9 deletions
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11
net/sunrpc/auth_gss/svcauth_gss.c
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@ -1797,15 +1797,8 @@ static int svcauth_gss_wrap_integ(struct svc_rqst *rqstp)
*p++ = htonl(gc->gc_seq);
if (xdr_buf_subsegment(buf, &databody_integ, offset, len))
goto wrap_failed;
if (!buf->tail[0].iov_base) {
if (buf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE)
goto wrap_failed;
buf->tail[0].iov_base = buf->head[0].iov_base
+ buf->head[0].iov_len;
buf->tail[0].iov_len = 0;
}
resv = &buf->tail[0];
checksum.data = (u8 *)resv->iov_base + resv->iov_len + 4;
checksum.data = gsd->gsd_scratch;
maj_stat = gss_get_mic(gsd->rsci->mechctx, &databody_integ, &checksum);
if (maj_stat != GSS_S_COMPLETE)
goto bad_mic;