On Thu, May 17, 2018 at 04:22:25PM +0300, Dan Carpenter wrote: > Hello Roman Gushchin, > > The patch a62213fe9b77: "selftests: cgroup: add memory controller > self-tests" from May 11, 2018, leads to the following static checker > warning: > > ./tools/testing/selftests/cgroup/cgroup_util.c:62 cg_name() > warn: variable dereferenced before check 'name' (see line 59) > Hi Dan! Thank you for the report! The fix is below. Roman -- >From ec990dc816b0a36201bed84e5b38b928b9bb9138 Mon Sep 17 00:00:00 2001 From: Roman Gushchin <guro@xxxxxx> Date: Thu, 17 May 2018 16:53:15 +0100 Subject: [PATCH] kselftest/cgroup: fix variable dereferenced before check warning cg_name(const char *root, const char *name) is always called with non-empty root and name arguments, so there is no sense in checking it in the function body (after using in strlen()). Signed-off-by: Roman Gushchin <guro@xxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Cc: linux-kselftest@xxxxxxxxxxxxxxx --- tools/testing/selftests/cgroup/cgroup_util.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c index 41cc3b5e5be1..b69bdeb4b9fe 100644 --- a/tools/testing/selftests/cgroup/cgroup_util.c +++ b/tools/testing/selftests/cgroup/cgroup_util.c @@ -59,8 +59,7 @@ char *cg_name(const char *root, const char *name) size_t len = strlen(root) + strlen(name) + 2; char *ret = malloc(len); - if (name) - snprintf(ret, len, "%s/%s", root, name); + snprintf(ret, len, "%s/%s", root, name); return ret; } @@ -70,8 +69,7 @@ char *cg_name_indexed(const char *root, const char *name, int index) size_t len = strlen(root) + strlen(name) + 10; char *ret = malloc(len); - if (name) - snprintf(ret, len, "%s/%s_%d", root, name, index); + snprintf(ret, len, "%s/%s_%d", root, name, index); return ret; } -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
