From 823dde8ea7b4f22c697922e5c078ce9f312c6663 Mon Sep 17 00:00:00 2001
From: Ismael Gomez <ismagom@gmail.com>
Date: Mon, 13 Jun 2016 16:47:15 +0200
Subject: [PATCH] prach: added check for freq_offset space

---
 srslte/lib/phch/prach.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/srslte/lib/phch/prach.c b/srslte/lib/phch/prach.c
index 721e568fa..128de1860 100644
--- a/srslte/lib/phch/prach.c
+++ b/srslte/lib/phch/prach.c
@@ -466,6 +466,11 @@ int srslte_prach_gen(srslte_prach_t *p,
     uint32_t K = DELTA_F/DELTA_F_RA;
     uint32_t begin = PHI + (K*k_0) + (K/2);
 
+    if (6 + freq_offset > N_rb_ul) {
+      fprintf(stderr, "Error no space for PRACH: frequency offset=%d, N_rb_ul=%d\n", freq_offset, N_rb_ul);
+      return ret; 
+    }
+    
     DEBUG("N_zc: %d, N_cp: %d, N_seq: %d, N_ifft_prach=%d begin: %d\n", 
           p->N_zc, p->N_cp, p->N_seq, p->N_ifft_prach, begin);