| Message ID | 20240711074437.2283810-1-make24@iscas.ac.cn (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | bpf, selftests: fix a resource leak in main() | expand |
On Thu, 2024-07-11 at 15:44 +0800, Ma Ke wrote: > The requested resources should be closed before return in main(), otherwise > resource leak will occur. Add a check of cgroup_fd and close(). Note: it is better to group related patches to a patch-set. > > Fixes: 4939b2847d26 ("bpf, selftests: Use single cgroup helpers for both test_sockmap/progs") > Signed-off-by: Ma Ke <make24@iscas.ac.cn> > --- > tools/testing/selftests/bpf/test_dev_cgroup.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/tools/testing/selftests/bpf/test_dev_cgroup.c b/tools/testing/selftests/bpf/test_dev_cgroup.c > index adeaf63cb6fa..e97fc061fab2 100644 > --- a/tools/testing/selftests/bpf/test_dev_cgroup.c > +++ b/tools/testing/selftests/bpf/test_dev_cgroup.c > @@ -81,5 +81,7 @@ int main(int argc, char **argv) > cleanup_cgroup_environment(); > > out: > + if (cgroup_fd >= 0) > + close(cgroup_fd); This is a standalone program, and Linux closes file descriptors on process exit, why do you think it's necessary to close the fd here? > return error; > }
diff --git a/tools/testing/selftests/bpf/test_dev_cgroup.c b/tools/testing/selftests/bpf/test_dev_cgroup.c index adeaf63cb6fa..e97fc061fab2 100644 --- a/tools/testing/selftests/bpf/test_dev_cgroup.c +++ b/tools/testing/selftests/bpf/test_dev_cgroup.c @@ -81,5 +81,7 @@ int main(int argc, char **argv) cleanup_cgroup_environment(); out: + if (cgroup_fd >= 0) + close(cgroup_fd); return error; }
The requested resources should be closed before return in main(), otherwise resource leak will occur. Add a check of cgroup_fd and close(). Fixes: 4939b2847d26 ("bpf, selftests: Use single cgroup helpers for both test_sockmap/progs") Signed-off-by: Ma Ke <make24@iscas.ac.cn> --- tools/testing/selftests/bpf/test_dev_cgroup.c | 2 ++ 1 file changed, 2 insertions(+)