From: Chengguang Xu <cgxu519@xxxxxxx> Subject: 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@xxxxxxx Signed-off-by: Chengguang Xu <cgxu519@xxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Eric Van Hensbergen <ericvh@xxxxxxxxx> Cc: Ron Minnich <rminnich@xxxxxxxxxx> Cc: Latchesar Ionkov <lucho@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/9p/v9fs.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) diff -puN fs/9p/v9fs.c~fs-9p-detecting-invalid-options-as-much-as-possible fs/9p/v9fs.c --- a/fs/9p/v9fs.c~fs-9p-detecting-invalid-options-as-much-as-possible +++ a/fs/9p/v9fs.c @@ -210,12 +210,12 @@ static int v9fs_parse_options(struct v9f 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 v9f 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 v9f 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 v9f 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 v9f "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 v9f 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; } } _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
