From 9c1c09c3d1343c75890a02a43630be22cfc8188e Mon Sep 17 00:00:00 2001 From: Bhavik Sachdev Date: Sat, 29 Nov 2025 14:41:20 +0530 Subject: [PATCH] statmount: permission check should return EPERM [ Upstream commit fccbe38a5d06dbe44bcd89196fe1d2c2272a1f4a ] Currently, statmount() returns ENOENT when caller is not CAP_SYS_ADMIN in the user namespace owner of target mount namespace. This should be EPERM instead. Suggested-by: Miklos Szeredi Signed-off-by: Bhavik Sachdev Link: https://patch.msgid.link/20251129091455.757724-2-b.sachdev1904@gmail.com Signed-off-by: Christian Brauner Signed-off-by: Sasha Levin --- fs/namespace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/namespace.c b/fs/namespace.c index c3702f3303a8..3869d2b32ac2 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -5395,7 +5395,7 @@ SYSCALL_DEFINE4(statmount, const struct mnt_id_req __user *, req, if (kreq.mnt_ns_id && (ns != current->nsproxy->mnt_ns) && !ns_capable_noaudit(ns->user_ns, CAP_SYS_ADMIN)) - return -ENOENT; + return -EPERM; ks = kmalloc(sizeof(*ks), GFP_KERNEL_ACCOUNT); if (!ks)