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authorChengguang Xu <cgxu519@gmx.com>2018-06-07 17:05:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-07 17:34:34 -0700
commit478ae0ca08c239e83803191317ae99d66708306c (patch)
treecf5b694e217e98f2103e2086576063d394b295bc
parent8d856c72b42d585fb17a8aa18454e03a0cf9b2b8 (diff)
fs/9p: detect invalid options as much as possible
Currently when detecting invalid options in option parsing, some options(e.g. msize) just set errno and allow to continuously validate other options so that it can detect invalid options as much as possible and give proper error messages together. This patch applies same rule to option 'cache' and 'access' when detecting -EINVAL. Link: http://lkml.kernel.org/r/1525340676-34072-2-git-send-email-cgxu519@gmx.com Signed-off-by: Chengguang Xu <cgxu519@gmx.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Ron Minnich <rminnich@sandia.gov> Cc: Latchesar Ionkov <lucho@ionkov.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/9p/v9fs.c29
1 files changed, 12 insertions, 17 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index e622f0f10502..0429c8ee58f1 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -210,12 +210,12 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
p9_debug(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
ret = r;
- continue;
- }
- v9ses->debug = option;
+ } else {
+ v9ses->debug = option;
#ifdef CONFIG_NET_9P_DEBUG
- p9_debug_level = option;
+ p9_debug_level = option;
#endif
+ }
break;
case Opt_dfltuid:
@@ -231,7 +231,6 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
p9_debug(P9_DEBUG_ERROR,
"uid field, but not a uid?\n");
ret = -EINVAL;
- continue;
}
break;
case Opt_dfltgid:
@@ -247,7 +246,6 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
p9_debug(P9_DEBUG_ERROR,
"gid field, but not a gid?\n");
ret = -EINVAL;
- continue;
}
break;
case Opt_afid:
@@ -256,9 +254,9 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
p9_debug(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
ret = r;
- continue;
+ } else {
+ v9ses->afid = option;
}
- v9ses->afid = option;
break;
case Opt_uname:
kfree(v9ses->uname);
@@ -306,13 +304,12 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
"problem allocating copy of cache arg\n");
goto free_and_return;
}
- ret = get_cache_mode(s);
- if (ret == -EINVAL) {
- kfree(s);
- goto free_and_return;
- }
+ r = get_cache_mode(s);
+ if (r < 0)
+ ret = r;
+ else
+ v9ses->cache = r;
- v9ses->cache = ret;
kfree(s);
break;
@@ -341,14 +338,12 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts)
pr_info("Unknown access argument %s\n",
s);
kfree(s);
- goto free_and_return;
+ continue;
}
v9ses->uid = make_kuid(current_user_ns(), uid);
if (!uid_valid(v9ses->uid)) {
ret = -EINVAL;
pr_info("Uknown uid %s\n", s);
- kfree(s);
- goto free_and_return;
}
}