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author | Cyano Hao | 2018-04-04 21:20:26 +0800 |
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committer | Cyano Hao | 2018-04-04 21:20:26 +0800 |
commit | 84b366f414a26cc7abcd53fceee13df012076c12 (patch) | |
tree | 0c22fee59bfaeb3511578c7781fe7ea34418d281 /0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch | |
parent | 49cb4b6d3bfda9763040500c2308a9b3d07a6c51 (diff) | |
download | aur-84b366f414a26cc7abcd53fceee13df012076c12.tar.gz |
update to 4.15.14, merge config from Arch Linux 32 project
Diffstat (limited to '0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch')
-rw-r--r-- | 0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch b/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch new file mode 100644 index 000000000000..b39ed26b751d --- /dev/null +++ b/0001-add-sysctl-to-disallow-unprivileged-CLONE_NEWUSER-by.patch @@ -0,0 +1,103 @@ +From 188720e92122385994143a06cb16a930053eb503 Mon Sep 17 00:00:00 2001 +Message-Id: <188720e92122385994143a06cb16a930053eb503.1520639721.git.jan.steffens@gmail.com> +From: Serge Hallyn <serge.hallyn@canonical.com> +Date: Fri, 31 May 2013 19:12:12 +0100 +Subject: [PATCH 1/2] 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 2295fc69717f..6f320a216e7d 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 +@@ -1550,6 +1555,10 @@ 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. +@@ -2343,6 +2352,12 @@ 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 557d46728577..c19d7a828913 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 246d4d4ce5c7..f64432b45cec 100644 +--- a/kernel/user_namespace.c ++++ b/kernel/user_namespace.c +@@ -26,6 +26,9 @@ + #include <linux/bsearch.h> + #include <linux/sort.h> + ++/* sysctl */ ++int unprivileged_userns_clone; ++ + static struct kmem_cache *user_ns_cachep __read_mostly; + static DEFINE_MUTEX(userns_state_mutex); + +-- +2.16.2 + |