[PATCH iproute2] lib: ignore invalid mounts in cg_init_map

[Dmitry Yakunin]

In case of bad entries in /proc/mounts just skip cgroup cache initialization.
Cgroups in output will be shown as "unreachable:cgroup_id".

Fixes: d5e6ee0dac64 ("ss: introduce cgroup2 cache and helper functions")
Signed-off-by: Dmitry Yakunin <z...@yandex-team.ru>
Reported-by: Donald Sharp <sha...@nvidia.com>
---
 lib/cg_map.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/cg_map.c b/lib/cg_map.c
index 77f030e..39f244d 100644
--- a/lib/cg_map.c
+++ b/lib/cg_map.c
@@ -96,11 +96,10 @@ static void cg_init_map(void)
 
        mnt = find_cgroup2_mount(false);
        if (!mnt)
-               exit(1);
+               return;
 
        mntlen = strlen(mnt);
-       if (nftw(mnt, nftw_fn, 1024, FTW_MOUNT) < 0)
-               exit(1);
+       (void) nftw(mnt, nftw_fn, 1024, FTW_MOUNT);
 
        free(mnt);
 }
-- 
2.7.4