Messages in this thread Patch in this message | | | Date | Tue, 9 Oct 2007 19:48:20 -0400 | From | Gustavo Chain <> | Subject | [PATCH] Reserve N process to root |
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I think it's necessary to reserve some pids to the super user. 5 must be sufficient.
Signed-off-by: Gustavo Chain <g@0xff.cl> --- kernel/fork.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c index 33f12f4..db23cb3 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1367,11 +1367,17 @@ long do_fork(unsigned long clone_flags, int __user *parent_tidptr, int __user *child_tidptr) { +#define RESERVED_PIDS 5 + struct task_struct *p; int trace = 0; struct pid *pid = alloc_pid(); long nr; + if (!capable(CAP_SYS_ADMIN) && nr_threads >= max_threads - RESERVED_PIDS) { + return -EAGAIN; + } + if (!pid) return -EAGAIN; nr = pid->nr; -- Gustavo Chaín Dumit - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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