nspawn: unref the notify event source (#4941)
Fixes: ``` sudo ./libtool --mode=execute valgrind --leak-check=full ./systemd-nspawn -D ./CONT/ -b ... ==21224== 2,444 (656 direct, 1,788 indirect) bytes in 1 blocks are definitely lost in loss record 13 of 15 ==21224== at 0x4C2FA50: calloc (vg_replace_malloc.c:711) ==21224== by 0x4F6F565: sd_event_new (sd-event.c:431) ==21224== by 0x1210BE: run (nspawn.c:3351) ==21224== by 0x123908: main (nspawn.c:3826) ==21224== ==21224== LEAK SUMMARY: ==21224== definitely lost: 656 bytes in 1 blocks ==21224== indirectly lost: 1,788 bytes in 11 blocks ==21224== possibly lost: 0 bytes in 0 blocks ==21224== still reachable: 8,344 bytes in 3 blocks ==21224== suppressed: 0 bytes in 0 blocks ``` Closes #4934
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@ -2796,15 +2796,14 @@ static int nspawn_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t r
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return 0;
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}
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static int setup_sd_notify_parent(sd_event *event, int fd, pid_t *inner_child_pid) {
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static int setup_sd_notify_parent(sd_event *event, int fd, pid_t *inner_child_pid, sd_event_source **notify_event_source) {
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int r;
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sd_event_source *notify_event_source;
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r = sd_event_add_io(event, ¬ify_event_source, fd, EPOLLIN, nspawn_dispatch_notify_fd, inner_child_pid);
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r = sd_event_add_io(event, notify_event_source, fd, EPOLLIN, nspawn_dispatch_notify_fd, inner_child_pid);
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if (r < 0)
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return log_error_errno(r, "Failed to allocate notify event source: %m");
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(void) sd_event_source_set_description(notify_event_source, "nspawn-notify");
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(void) sd_event_source_set_description(*notify_event_source, "nspawn-notify");
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return 0;
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}
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@ -3069,6 +3068,7 @@ static int run(int master,
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uid_shift_socket_pair[2] = { -1, -1 };
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_cleanup_close_ int notify_socket= -1;
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_cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL;
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_cleanup_(sd_event_source_unrefp) sd_event_source *notify_event_source = NULL;
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_cleanup_(sd_event_unrefp) sd_event *event = NULL;
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_cleanup_(pty_forward_freep) PTYForward *forward = NULL;
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_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
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@ -3352,7 +3352,7 @@ static int run(int master,
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if (r < 0)
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return log_error_errno(r, "Failed to get default event source: %m");
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r = setup_sd_notify_parent(event, notify_socket, PID_TO_PTR(*pid));
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r = setup_sd_notify_parent(event, notify_socket, PID_TO_PTR(*pid), ¬ify_event_source);
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if (r < 0)
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return r;
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