diff options
-rw-r--r-- | net/9p/client.c | 21 | ||||
-rw-r--r-- | net/9p/trans_common.c | 1 |
2 files changed, 22 insertions, 0 deletions
diff --git a/net/9p/client.c b/net/9p/client.c index 2c9a17b9b46b..357214a51f13 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -181,6 +181,12 @@ static int parse_opts(char *opts, struct p9_client *clnt) ret = r; continue; } + if (option < 4096) { + p9_debug(P9_DEBUG_ERROR, + "msize should be at least 4k\n"); + ret = -EINVAL; + continue; + } clnt->msize = option; break; case Opt_trans: @@ -983,10 +989,18 @@ static int p9_client_version(struct p9_client *c) else if (!strncmp(version, "9P2000", 6)) c->proto_version = p9_proto_legacy; else { + p9_debug(P9_DEBUG_ERROR, + "server returned an unknown version: %s\n", version); err = -EREMOTEIO; goto error; } + if (msize < 4096) { + p9_debug(P9_DEBUG_ERROR, + "server returned a msize < 4096: %d\n", msize); + err = -EREMOTEIO; + goto error; + } if (msize < c->msize) c->msize = msize; @@ -1043,6 +1057,13 @@ struct p9_client *p9_client_create(const char *dev_name, char *options) if (clnt->msize > clnt->trans_mod->maxsize) clnt->msize = clnt->trans_mod->maxsize; + if (clnt->msize < 4096) { + p9_debug(P9_DEBUG_ERROR, + "Please specify a msize of at least 4k\n"); + err = -EINVAL; + goto free_client; + } + err = p9_client_version(clnt); if (err) goto close_trans; diff --git a/net/9p/trans_common.c b/net/9p/trans_common.c index b718db2085b2..3dff68f05fb9 100644 --- a/net/9p/trans_common.c +++ b/net/9p/trans_common.c @@ -14,6 +14,7 @@ #include <linux/mm.h> #include <linux/module.h> +#include "trans_common.h" /** * p9_release_pages - Release pages after the transaction. |