From: Philippe Mathieu-Daudé <philmd@redhat.com>
Date: Fri, 19 Aug 2022 15:39:26 +0000 (+0100)
Subject: hw/ppc/pnv: Avoid dynamic stack allocation
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=a580fdcd609e1db77ef5a1cbcbfd2af5ca05c939;p=qmiga%2Fqemu.git

hw/ppc/pnv: Avoid dynamic stack allocation

Use autofree heap allocation instead of variable-length
array on the stack.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-id: 20220819153931.3147384-7-peter.maydell@linaro.org
---

diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
index 354aa289d1..78e00afb9b 100644
--- a/hw/ppc/pnv.c
+++ b/hw/ppc/pnv.c
@@ -138,7 +138,7 @@ static void pnv_dt_core(PnvChip *chip, PnvCore *pc, void *fdt)
     int smt_threads = CPU_CORE(pc)->nr_threads;
     CPUPPCState *env = &cpu->env;
     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cs);
-    uint32_t servers_prop[smt_threads];
+    g_autofree uint32_t *servers_prop = g_new(uint32_t, smt_threads);
     int i;
     uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
                        0xffffffff, 0xffffffff};
@@ -241,7 +241,7 @@ static void pnv_dt_core(PnvChip *chip, PnvCore *pc, void *fdt)
         servers_prop[i] = cpu_to_be32(pc->pir + i);
     }
     _FDT((fdt_setprop(fdt, offset, "ibm,ppc-interrupt-server#s",
-                       servers_prop, sizeof(servers_prop))));
+                       servers_prop, sizeof(*servers_prop) * smt_threads)));
 }
 
 static void pnv_dt_icp(PnvChip *chip, void *fdt, uint32_t pir,
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index cc1adc23fa..8bbaf4f8a4 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -177,8 +177,8 @@ static int spapr_fixup_cpu_smt_dt(void *fdt, int offset, PowerPCCPU *cpu,
                                   int smt_threads)
 {
     int i, ret = 0;
-    uint32_t servers_prop[smt_threads];
-    uint32_t gservers_prop[smt_threads * 2];
+    g_autofree uint32_t *servers_prop = g_new(uint32_t, smt_threads);
+    g_autofree uint32_t *gservers_prop = g_new(uint32_t, smt_threads * 2);
     int index = spapr_get_vcpu_id(cpu);
 
     if (cpu->compat_pvr) {
@@ -196,12 +196,12 @@ static int spapr_fixup_cpu_smt_dt(void *fdt, int offset, PowerPCCPU *cpu,
         gservers_prop[i*2 + 1] = 0;
     }
     ret = fdt_setprop(fdt, offset, "ibm,ppc-interrupt-server#s",
-                      servers_prop, sizeof(servers_prop));
+                      servers_prop, sizeof(*servers_prop) * smt_threads);
     if (ret < 0) {
         return ret;
     }
     ret = fdt_setprop(fdt, offset, "ibm,ppc-interrupt-gserver#s",
-                      gservers_prop, sizeof(gservers_prop));
+                      gservers_prop, sizeof(*gservers_prop) * smt_threads * 2);
 
     return ret;
 }
diff --git a/hw/ppc/spapr_pci_nvlink2.c b/hw/ppc/spapr_pci_nvlink2.c
index 63b476c8f7..2a8a11be1d 100644
--- a/hw/ppc/spapr_pci_nvlink2.c
+++ b/hw/ppc/spapr_pci_nvlink2.c
@@ -397,7 +397,7 @@ void spapr_phb_nvgpu_populate_pcidev_dt(PCIDevice *dev, void *fdt, int offset,
             continue;
         }
         if (dev == nvslot->gpdev) {
-            uint32_t npus[nvslot->linknum];
+            g_autofree uint32_t *npus = g_new(uint32_t, nvslot->linknum);
 
             for (j = 0; j < nvslot->linknum; ++j) {
                 PCIDevice *npdev = nvslot->links[j].npdev;