diff options
Diffstat (limited to '0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch')
| -rw-r--r-- | 0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch | 84 |
1 files changed, 53 insertions, 31 deletions
diff --git a/0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch b/0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch index 04852f6..d881572 100644 --- a/0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch +++ b/0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-C.patch @@ -1,21 +1,44 @@ -From 673deeaa0505b542ef9516a42ced24d724c2cc6f Mon Sep 17 00:00:00 2001 +From 56c7f1acc778e6e90ea7777c0d3d217ccf3e470e Mon Sep 17 00:00:00 2001 From: "Jan Alexander Steffens (heftig)" <jan.steffens@gmail.com> Date: Mon, 16 Sep 2019 04:53:20 +0200 Subject: ZEN: Add sysctl and CONFIG to disallow unprivileged CLONE_NEWUSER Our default behavior continues to match the vanilla kernel. --- - init/Kconfig | 16 ++++++++++++++++ - kernel/fork.c | 15 +++++++++++++++ - kernel/sysctl.c | 12 ++++++++++++ - kernel/user_namespace.c | 7 +++++++ - 4 files changed, 50 insertions(+) + include/linux/user_namespace.h | 4 ++++ + init/Kconfig | 16 ++++++++++++++++ + kernel/fork.c | 14 ++++++++++++++ + kernel/sysctl.c | 12 ++++++++++++ + kernel/user_namespace.c | 7 +++++++ + 5 files changed, 53 insertions(+) +diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h +index 6ef1c7109fc4..2140091b0b8d 100644 +--- a/include/linux/user_namespace.h ++++ b/include/linux/user_namespace.h +@@ -106,6 +106,8 @@ void dec_ucount(struct ucounts *ucounts, enum ucount_type type); + + #ifdef CONFIG_USER_NS + ++extern int unprivileged_userns_clone; ++ + static inline struct user_namespace *get_user_ns(struct user_namespace *ns) + { + if (ns) +@@ -139,6 +141,8 @@ extern bool current_in_userns(const struct user_namespace *target_ns); + struct ns_common *ns_get_owner(struct ns_common *ns); + #else + ++#define unprivileged_userns_clone 0 ++ + static inline struct user_namespace *get_user_ns(struct user_namespace *ns) + { + return &init_user_ns; diff --git a/init/Kconfig b/init/Kconfig -index a34064a031a5..0342f34271b3 100644 +index d6a0b31b13dc..2420d38cbfb9 100644 --- a/init/Kconfig +++ b/init/Kconfig -@@ -1102,6 +1102,22 @@ config USER_NS +@@ -1168,6 +1168,22 @@ config USER_NS If unsure, say N. @@ -39,22 +62,21 @@ index a34064a031a5..0342f34271b3 100644 bool "PID Namespaces" default y diff --git a/kernel/fork.c b/kernel/fork.c -index 080809560072..1cb7b827b57b 100644 +index da8d360fb032..e1a347df77ac 100644 --- a/kernel/fork.c +++ b/kernel/fork.c -@@ -106,6 +106,11 @@ +@@ -96,6 +96,10 @@ + #include <linux/kasan.h> + #include <linux/scs.h> - #define CREATE_TRACE_POINTS - #include <trace/events/task.h> +#ifdef CONFIG_USER_NS -+extern int unprivileged_userns_clone; -+#else -+#define unprivileged_userns_clone 0 ++#include <linux/user_namespace.h> +#endif - - /* - * Minimum number of threads to boot the kernel -@@ -1843,6 +1848,10 @@ static __latent_entropy struct task_struct *copy_process( ++ + #include <asm/pgalloc.h> + #include <linux/uaccess.h> + #include <asm/mmu_context.h> +@@ -1841,6 +1845,10 @@ static __latent_entropy struct task_struct *copy_process( if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS)) return ERR_PTR(-EINVAL); @@ -65,7 +87,7 @@ index 080809560072..1cb7b827b57b 100644 /* * Thread groups must share signals as well, and detached threads * can only be started up within the thread group. -@@ -2923,6 +2932,12 @@ int ksys_unshare(unsigned long unshare_flags) +@@ -2900,6 +2908,12 @@ int ksys_unshare(unsigned long unshare_flags) if (unshare_flags & CLONE_NEWNS) unshare_flags |= CLONE_FS; @@ -79,20 +101,20 @@ index 080809560072..1cb7b827b57b 100644 if (err) goto bad_unshare_out; diff --git a/kernel/sysctl.c b/kernel/sysctl.c -index 70665934d53e..9797869ed829 100644 +index afad085960b8..a94828fb31c2 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c -@@ -110,6 +110,9 @@ extern int core_uses_pid; - extern char core_pattern[]; - extern unsigned int core_pipe_limit; +@@ -103,6 +103,9 @@ + #ifdef CONFIG_LOCKUP_DETECTOR + #include <linux/nmi.h> #endif +#ifdef CONFIG_USER_NS -+extern int unprivileged_userns_clone; ++#include <linux/user_namespace.h> +#endif - extern int pid_max; - extern int pid_max_min, pid_max_max; - extern int percpu_pagelist_fraction; -@@ -546,6 +549,15 @@ static struct ctl_table kern_table[] = { + + #if defined(CONFIG_SYSCTL) + +@@ -1902,6 +1905,15 @@ static struct ctl_table kern_table[] = { .proc_handler = proc_dointvec, }, #endif @@ -109,7 +131,7 @@ index 70665934d53e..9797869ed829 100644 { .procname = "tainted", diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c -index 8eadadc478f9..c36ecd19562c 100644 +index 87804e0371fe..66b5afb0d0ee 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -21,6 +21,13 @@ @@ -127,5 +149,5 @@ index 8eadadc478f9..c36ecd19562c 100644 static DEFINE_MUTEX(userns_state_mutex); -- -cgit v1.2.1-1-g437b +cgit v1.2.3-1-gf6bb5 |