[PATCH 0/1] fix dumpdtb crash with ARM machines

[Daniel Henrique Barboza]

Hi,

This is a re-post of "[PATCH v8 03/16] hw/arm: do not free machine->fdt
in arm_load_dtb()":

https://lists.gnu.org/archive/html/qemu-devel/2022-09/msg04201.html

Turns out that I drop the ball and left this patch behind. Aside from
some patches of that series that were optional, the way ARM code is
working ATM is causing 'dumpdtb' to crash QEMU, as reported by Markus in
https://lists.gnu.org/archive/html/qemu-devel/2023-03/msg05858.html .

Applying this patch fixes the reported crash:

$ ./qemu-system-aarch64 -S -M virt -display none -qmp stdio
{"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 7}, "package": 
"v8.0.0-rc1-37-g298c4469cf"}, "capabilities": ["oob"]}}
{"execute": "qmp_capabilities", "arguments": {"enable": ["oob"]}}
{"return": {}}
{"execute": "dumpdtb", "arguments": {"filename": "fdt.dtb"}}
{"return": {}}
^Cqemu-system-aarch64: terminating on signal 2
{"timestamp": {"seconds": 1679587153, "microseconds": 714319}, "event": 
"SHUTDOWN", "data": {"guest": false, "reason": "host-signal"}}
$ 
$ dtc -I dtb -O dts fdt.dtb | grep timer
        timer {
                compatible = "arm,armv7-timer";
$

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Markus Armbruster <armbru@redhat.com>
Cc: qemu-arm@nongnu.org

Daniel Henrique Barboza (1):
  hw/arm: do not free machine->fdt in arm_load_dtb()

 hw/arm/boot.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

-- 
2.39.2