diff options
Diffstat (limited to 'kernels/linux-libre-lts-xtreme/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch')
-rw-r--r-- | kernels/linux-libre-lts-xtreme/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/kernels/linux-libre-lts-xtreme/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch b/kernels/linux-libre-lts-xtreme/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch deleted file mode 100644 index a989d666a..000000000 --- a/kernels/linux-libre-lts-xtreme/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch +++ /dev/null @@ -1,103 +0,0 @@ -From 4e54373158caa50df5402fdd3db1794c5394026b Mon Sep 17 00:00:00 2001 -Message-Id: <4e54373158caa50df5402fdd3db1794c5394026b.1516188238.git.jan.steffens@gmail.com> -From: Serge Hallyn <serge.hallyn@canonical.com> -Date: Fri, 31 May 2013 19:12:12 +0100 -Subject: [PATCH 1/4] add sysctl to disallow unprivileged CLONE_NEWUSER by - default - -Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> -[bwh: Remove unneeded binary sysctl bits] -Signed-off-by: Daniel Micay <danielmicay@gmail.com> ---- - kernel/fork.c | 15 +++++++++++++++ - kernel/sysctl.c | 12 ++++++++++++ - kernel/user_namespace.c | 3 +++ - 3 files changed, 30 insertions(+) - -diff --git a/kernel/fork.c b/kernel/fork.c -index 500ce64517d9..35f5860958b4 100644 ---- a/kernel/fork.c -+++ b/kernel/fork.c -@@ -102,6 +102,11 @@ - - #define CREATE_TRACE_POINTS - #include <trace/events/task.h> -+#ifdef CONFIG_USER_NS -+extern int unprivileged_userns_clone; -+#else -+#define unprivileged_userns_clone 0 -+#endif - - /* - * Minimum number of threads to boot the kernel -@@ -1554,6 +1559,10 @@ static __latent_entropy struct task_struct *copy_process( - if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS)) - return ERR_PTR(-EINVAL); - -+ if ((clone_flags & CLONE_NEWUSER) && !unprivileged_userns_clone) -+ if (!capable(CAP_SYS_ADMIN)) -+ return ERR_PTR(-EPERM); -+ - /* - * Thread groups must share signals as well, and detached threads - * can only be started up within the thread group. -@@ -2347,6 +2356,12 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags) - if (unshare_flags & CLONE_NEWNS) - unshare_flags |= CLONE_FS; - -+ if ((unshare_flags & CLONE_NEWUSER) && !unprivileged_userns_clone) { -+ err = -EPERM; -+ if (!capable(CAP_SYS_ADMIN)) -+ goto bad_unshare_out; -+ } -+ - err = check_unshare_flags(unshare_flags); - if (err) - goto bad_unshare_out; -diff --git a/kernel/sysctl.c b/kernel/sysctl.c -index 56aca862c4f5..e8402ba393c1 100644 ---- a/kernel/sysctl.c -+++ b/kernel/sysctl.c -@@ -105,6 +105,9 @@ extern int core_uses_pid; - extern char core_pattern[]; - extern unsigned int core_pipe_limit; - #endif -+#ifdef CONFIG_USER_NS -+extern int unprivileged_userns_clone; -+#endif - extern int pid_max; - extern int pid_max_min, pid_max_max; - extern int percpu_pagelist_fraction; -@@ -513,6 +516,15 @@ static struct ctl_table kern_table[] = { - .proc_handler = proc_dointvec, - }, - #endif -+#ifdef CONFIG_USER_NS -+ { -+ .procname = "unprivileged_userns_clone", -+ .data = &unprivileged_userns_clone, -+ .maxlen = sizeof(int), -+ .mode = 0644, -+ .proc_handler = proc_dointvec, -+ }, -+#endif - #ifdef CONFIG_PROC_SYSCTL - { - .procname = "tainted", -diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c -index c490f1e4313b..dd03bd39d7bf 100644 ---- a/kernel/user_namespace.c -+++ b/kernel/user_namespace.c -@@ -24,6 +24,9 @@ - #include <linux/projid.h> - #include <linux/fs_struct.h> - -+/* sysctl */ -+int unprivileged_userns_clone; -+ - static struct kmem_cache *user_ns_cachep __read_mostly; - static DEFINE_MUTEX(userns_state_mutex); - --- -2.15.1 - |