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| author | Eric W. Biederman <ebiederm@xmission.com> | 2016-08-08 20:54:50 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2016-08-08 21:40:30 +0200 |
| commit | f6b2db1a3e8d141dd144df58900fb0444d5d7c53 (patch) | |
| tree | aba951303e8d0c07b3f0293e33cd0af230b813a5 /kernel/fork.c | |
| parent | userns: Add a limit on the number of user namespaces (diff) | |
| download | linux-f6b2db1a3e8d141dd144df58900fb0444d5d7c53.tar.xz linux-f6b2db1a3e8d141dd144df58900fb0444d5d7c53.zip | |
userns: Make the count of user namespaces per user
Add a structure that is per user and per user ns and use it to hold
the count of user namespaces. This makes prevents one user from
creating denying service to another user by creating the maximum
number of user namespaces.
Rename the sysctl export of the maximum count from
/proc/sys/userns/max_user_namespaces to /proc/sys/user/max_user_namespaces
to reflect that the count is now per user.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index daa6a82b4900..d8cde533ace3 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -322,7 +322,7 @@ void __init fork_init(void) init_task.signal->rlim[RLIMIT_SIGPENDING] = init_task.signal->rlim[RLIMIT_NPROC]; - init_user_ns.max_user_namespaces = max_threads; + init_user_ns.max_user_namespaces = max_threads/2; } int __weak arch_dup_task_struct(struct task_struct *dst, |