commit 7701aeed0f0162fe9f6d1bb1ccba158b55a2ded4
author Cédric Le Goater <clg@kaod.org> Sat Jun 15 10:12:52 2019 +0200
committer David Gibson <david@gibson.dropbear.id.au> Tue Jul 02 09:43:58 2019 +1000
tree 89753e78aca92f4e1c804dcf97cacf5c5a258c84
parent 7abc0c6d35306a41a48eda7ab2b7b2d51f32f86b

target/ppc: fix compile error in kvmppc_define_rtas_kernel_token()

gcc9 reports :

In file included from /usr/include/string.h:494,
                 from ./include/qemu/osdep.h:101,
                 from ./target/ppc/kvm.c:17:
In function ‘strncpy’,
    inlined from ‘kvmppc_define_rtas_kernel_token’ at ./target/ppc/kvm.c:2648:5:
/usr/include/bits/string_fortified.h:106:10: error: ‘__builtin_strncpy’ specified bound 120 equals destination size [-Werror=stringop-truncation]
  106 |   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190615081252.28602-1-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

target/ppc/kvm.c

diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 4b4989c..9014ed0 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2650,7 +2650,7 @@
         return -ENOENT;
     }
 
-    strncpy(args.name, function, sizeof(args.name));
+    strncpy(args.name, function, sizeof(args.name) - 1);
 
     return kvm_vm_ioctl(kvm_state, KVM_PPC_RTAS_DEFINE_TOKEN, &args);
 }