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authorAl Viro <viro@zeniv.linux.org.uk>2019-03-16 13:45:42 (GMT)
committerAl Viro <viro@zeniv.linux.org.uk>2019-03-16 13:45:42 (GMT)
commitab81dabda1d4edc1728173be6c6a279455f220e3 (patch)
tree05d94edf3d7c011e1d9661af01b53f57c30a4ff4
parentc99c2171fc61476afac0dfb59fb2c447a01fb1e0 (diff)
fix sysfs_init_fs_context() in !CONFIG_NET_NS case
Permission checks on current's netns should be done only when netns are enabled. Reported-by: Dominik Brodowski <linux@dominikbrodowski.net> Fixes: 23bf1b6be9c2 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/sysfs/mount.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 4cb21b5..1b56686 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -71,9 +71,11 @@ static int sysfs_init_fs_context(struct fs_context *fc)
kfc->magic = SYSFS_MAGIC;
fc->fs_private = kfc;
fc->ops = &sysfs_fs_context_ops;
- if (fc->user_ns)
- put_user_ns(fc->user_ns);
- fc->user_ns = get_user_ns(netns->user_ns);
+ if (netns) {
+ if (fc->user_ns)
+ put_user_ns(fc->user_ns);
+ fc->user_ns = get_user_ns(netns->user_ns);
+ }
fc->global = true;
return 0;
}

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