[Qemu-devel] [PATCH 1/4] Add error checking for qemu_find_file.

["Shreya Shrivastava" <pink89@sigaint.org>]

This patch adds check for NULL return value to uses of qemu_find_file.
 Signed-off-by: Shreya Shrivastava <pink89@sigaint.org>

---
 hw/microblaze/boot.c  | 5 +++++
 hw/ppc/e500.c         | 5 ++++-
 hw/ppc/mac_newworld.c | 5 +++++
 hw/ppc/mac_oldworld.c | 4 ++++
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c
index 9eebb1a..ba06bf5 100644
--- a/hw/microblaze/boot.c
+++ b/hw/microblaze/boot.c
@@ -127,6 +127,11 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu,
hwaddr ddr_base,
     /* default to pcbios dtb as passed by machine_init */
     if (!dtb_arg) {
         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
+        if (!filename) {
+                error_report("qemu: could not load dtb file '%s'",
+                             dtb_filename);
+                exit(EXIT_FAILURE);
+        }
     }

     boot_info.machine_cpu_reset = machine_cpu_reset;
diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
index cf8b122..3fce082 100644
--- a/hw/ppc/e500.c
+++ b/hw/ppc/e500.c
@@ -1014,7 +1014,10 @@ void ppce500_init(MachineState *machine,
PPCE500Params *params)
         }
     }
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
-
+    if (!filename) {
+        fprintf(stderr, "Couldn't open bios file %s\n", bios_name);
+        exit(1);
+    }
     bios_size = load_elf(filename, NULL, NULL, &bios_entry, &loadaddr, NULL,
                          1, PPC_ELF_MACHINE, 0, 0);
     if (bios_size < 0) {
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index 7d25106..9923f00 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -217,6 +217,11 @@ static void ppc_core99_init(MachineState *machine)
     if (bios_name == NULL)
         bios_name = PROM_FILENAME;
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
+    if (!filename) {
+                    fprintf(stderr, "Couldn't open bios file %s\n",
+                            bios_name);
+                    exit(1);
+    }
     memory_region_set_readonly(bios, true);
     memory_region_add_subregion(get_system_memory(), PROM_ADDR, bios);

diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 4479487..3e44c41 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -145,6 +145,10 @@ static void ppc_heathrow_init(MachineState *machine)
     if (bios_name == NULL)
         bios_name = PROM_FILENAME;
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
+    if (!filename) {
+        fprintf(stderr, "Couldn't open bios file %s\n", bios_name);
+        exit(1);
+    }
     memory_region_set_readonly(bios, true);
     memory_region_add_subregion(sysmem, PROM_ADDR, bios);

-- 
1.9.1