Check syscall return values.

[exim.git] / src / src / dkim.c

diff --git a/src/src/dkim.c b/src/src/dkim.c
index 05b5fec56e62073f4f5d1d1640ee42d7ca782bad..cb7fc706513a6cdbfcd8deb7a1acaa730846dc43 100644 (file)
--- a/src/src/dkim.c
+++ b/src/src/dkim.c
@@ -504,7 +504,12 @@ uschar *dkim_exim_sign(int dkim_fd,
         rc = NULL;
         goto CLEANUP;
       }
-      (void)read(privkey_fd,big_buffer,(big_buffer_size-2));
+      if (read(privkey_fd,big_buffer,(big_buffer_size-2)) < 0) {
+        log_write(0, LOG_MAIN|LOG_PANIC, "unable to read private key file: %s",
+         dkim_private_key_expanded);
+        rc = NULL;
+        goto CLEANUP;
+      }
       (void)close(privkey_fd);
       dkim_private_key_expanded = big_buffer;
     }