From: Viktor Prutyanov <viktor.prutya...@redhat.com>
When number of CPUs utilized by guest Windows is less than defined in
QEMU (i.e., desktop versions of Windows severely limits number of CPU
sockets), patch_and_save_context routine accesses non-existent PRCB and
fails. So, limit number of processed PRCBs by NumberProcessors taken
from guest Windows driver.
Signed-off-by: Viktor Prutyanov <viktor.prutya...@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com>
Message-Id: <20221019235948.656411-1-viktor.prutya...@redhat.com>
---
dump/win_dump.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/dump/win_dump.c b/dump/win_dump.c
index fd91350fbb..f20b6051b6 100644
--- a/dump/win_dump.c
+++ b/dump/win_dump.c
@@ -273,6 +273,13 @@ static void patch_and_save_context(WinDumpHeader *h, bool
x64,
uint64_t Context;
WinContext ctx;
+ if (i >= WIN_DUMP_FIELD(NumberProcessors)) {
+ warn_report("win-dump: number of QEMU CPUs is bigger than"
+ " NumberProcessors (%u) in guest Windows",
+ WIN_DUMP_FIELD(NumberProcessors));
+ return;
+ }
+
if (cpu_read_ptr(x64, first_cpu,
KiProcessorBlock + i * win_dump_ptr_size(x64),
&Prcb)) {
--
2.37.3
