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-rw-r--r--elf/dl-reloc.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index 28f08de3e7..680caadd65 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -61,7 +61,10 @@ _dl_try_allocate_static_tls (struct link_map *map)
   size_t n;
   size_t blsize;
 
-  freebytes = GL(dl_tls_static_size) - GL(dl_tls_static_used) - TLS_TCB_SIZE;
+  freebytes = GL(dl_tls_static_size) - GL(dl_tls_static_used);
+  if (freebytes < TLS_TCB_SIZE)
+    goto fail;
+  freebytes -= TLS_TCB_SIZE;
 
   blsize = map->l_tls_blocksize + map->l_tls_firstbyte_offset;
   if (freebytes < blsize)