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authorLennart Poettering <lennart@poettering.net>2015-01-27 02:33:46 +0100
committerLennart Poettering <lennart@poettering.net>2015-01-27 02:33:46 +0100
commit7e26029ff36d6112bd8c3273327c97708f9ee61e (patch)
tree38c198d09c71c44b1393d7b7128472315f56ef96
parentc51cbfdcc7f38438553e4c2c60499f6aea7cc504 (diff)
timesyncd: set RLIMIT_NPROC to 2
This way timesyncd cannot be used to fork(). Note that it generally is not safe to use RLIMIT_NPROC, since it breaks running the same daemon in multiple containers if they do not use user namespacing. However, timesyncd is excepted from running in a container anyway, hence it is safe in this case.
-rw-r--r--src/timesync/timesyncd.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/timesync/timesyncd.c b/src/timesync/timesyncd.c
index f7e089fc0c..2a73dac033 100644
--- a/src/timesync/timesyncd.c
+++ b/src/timesync/timesyncd.c
@@ -113,6 +113,10 @@ int main(int argc, char *argv[]) {
if (r < 0)
goto finish;
+ /* We need one process for ourselves, plus one thread for the asynchronous resolver */
+ if (setrlimit(RLIMIT_NPROC, &RLIMIT_MAKE_CONST(2)) < 0)
+ log_warning_errno(errno, "Failed to lower RLIMIT_NPROC to 2: %m");
+
assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
r = manager_new(&m);