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| author |   Martijn de Gouw <martijn.de.gouw@prodrive-technologies.com> | 2020-10-19 13:42:27 +0200 |
|---|---|---|
| committer |   J. Bruce Fields <bfields@redhat.com> | 2020-10-20 13:21:30 -0400 |
| commit | d48c8124749c9a5081fe68680f83605e272c984b (patch) | |
| tree | c5a094ec951b61a0613c7c5430e119b92882ae79 /fs/nfs_common/Makefile | |
| parent | sunrpc: raise kernel RPC channel buffer size (diff) | |
| download | linux-dev-d48c8124749c9a5081fe68680f83605e272c984b.tar.xz linux-dev-d48c8124749c9a5081fe68680f83605e272c984b.zip | |
SUNRPC: fix copying of multiple pages in gss_read_proxy_verf()
When the passed token is longer than 4032 bytes, the remaining part
of the token must be copied from the rqstp->rq_arg.pages. But the
copy must make sure it happens in a consecutive way.
With the existing code, the first memcpy copies 'length' bytes from
argv->iobase, but since the header is in front, this never fills the
whole first page of in_token->pages.
The mecpy in the loop copies the following bytes, but starts writing at
the next page of in_token->pages. This leaves the last bytes of page 0
unwritten.
Symptoms were that users with many groups were not able to access NFS
exports, when using Active Directory as the KDC.
Signed-off-by: Martijn de Gouw <martijn.de.gouw@prodrive-technologies.com>
Fixes: 5866efa8cbfb "SUNRPC: Fix svcauth_gss_proxy_init()"
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfs_common/Makefile')
0 files changed, 0 insertions, 0 deletions