diff options
| author |   NeilBrown <neilb@suse.de> | 2006-04-10 22:55:34 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-11 06:18:52 -0700 |
| commit | dfee55f06213a23b250ea63ba41caa461cdd5e72 (patch) | |
| tree | cfee86e10c5f5406bf7f1fa98c2b5d73d66d259b /net/sunrpc | |
| parent | [PATCH] knfsd: nfsd4: fix corruption on readdir encoding with 64k pages (diff) | |
| download | linux-dev-dfee55f06213a23b250ea63ba41caa461cdd5e72.tar.xz linux-dev-dfee55f06213a23b250ea63ba41caa461cdd5e72.zip | |
[PATCH] knfsd: svcrpc: gss: don't call svc_take_page unnecessarily
We're using svc_take_page here to get another page for the tail in case one
wasn't already allocated. But there isn't always guaranteed to be another
page available.
Also fix a typo that made us check the tail buffer for space when we meant to
be checking the head buffer.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/auth_gss/svcauth_gss.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 4d7eb9e704da..d51e316c5821 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -1122,18 +1122,20 @@ svcauth_gss_release(struct svc_rqst *rqstp) integ_len)) BUG(); if (resbuf->page_len == 0 - && resbuf->tail[0].iov_len + RPC_MAX_AUTH_SIZE + && resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE < PAGE_SIZE) { BUG_ON(resbuf->tail[0].iov_len); /* Use head for everything */ resv = &resbuf->head[0]; } else if (resbuf->tail[0].iov_base == NULL) { - /* copied from nfsd4_encode_read */ - svc_take_page(rqstp); - resbuf->tail[0].iov_base = page_address(rqstp - ->rq_respages[rqstp->rq_resused-1]); - rqstp->rq_restailpage = rqstp->rq_resused-1; + if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE + > PAGE_SIZE) + goto out_err; + resbuf->tail[0].iov_base = + resbuf->head[0].iov_base + + resbuf->head[0].iov_len; resbuf->tail[0].iov_len = 0; + rqstp->rq_restailpage = 0; resv = &resbuf->tail[0]; } else { resv = &resbuf->tail[0]; |