disas/cris.c: Fix Coverity warning about unchecked NULL

Coverity (CID 1005689) warns that we don't check that
spec_reg_info() returned non-NULL before dereferencing.
Add the check, though as the comment notes this is
a can't-really-happen case because the earlier constraint
matching should have ruled out the "unknown reg" case.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/disas/cris.c b/disas/cris.c
index 08161d1..8a1daf9 100644 (file)
--- a/disas/cris.c
+++ b/disas/cris.c
@@ -2490,7 +2490,7 @@ print_with_operands (const struct cris_opcode *opcodep,
        const struct cris_spec_reg *sregp
          = spec_reg_info ((insn >> 12) & 15, disdata->distype);
 
-       if (sregp->name == NULL)
+       if (sregp == NULL || sregp->name == NULL)
          /* Should have been caught as a non-match earlier.  */
          *tp++ = '?';
        else