From: Dmitry Pimenov <sun4qemu@gmail.com>
Date: Fri, 10 Jul 2026 22:23:50 +0000 (+0200)
Subject: hw/sparc64/niagara: use int64_t for vdisk size to avoid truncation
X-Git-Tag: v11.1.0-rc1~14^2~6
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=76dbe26fd6500a94b85bf0f3a39d73b72f5fab7b;p=thirdparty%2Fqemu.git

hw/sparc64/niagara: use int64_t for vdisk size to avoid truncation

blk_getlength() returns int64_t, but niagara_init() stored it in an int,
truncating the if=pflash virtual-ramdisk size for images >= 2 GiB. A ~4 GiB
image truncated to 0/negative, failed the `size > 0` check, and exit(1)'d
before the CPU ran, ending with:

  qemu-system-sparc64: could not load ram disk

Signed-off-by: Dmitry Pimenov <sun4qemu@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
Message-ID: <20260710222350.9185-1-sun4qemu@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
---

diff --git a/hw/sparc64/niagara.c b/hw/sparc64/niagara.c
index 1211ecb82d..ad5e5945a8 100644
--- a/hw/sparc64/niagara.c
+++ b/hw/sparc64/niagara.c
@@ -137,7 +137,7 @@ static void niagara_init(MachineState *machine)
        outside of the partition RAM */
     if (dinfo) {
         BlockBackend *blk = blk_by_legacy_dinfo(dinfo);
-        int size = blk_getlength(blk);
+        int64_t size = blk_getlength(blk);
         if (size > 0) {
             memory_region_init_ram(&s->vdisk_ram, NULL, "sun4v_vdisk.ram", size,
                                    &error_fatal);