diff mbox series

[v1,1/2] physmem: Bail out qemu_ram_block_from_host() for invalid ram addrs

Message ID 20240701224421.1432654-2-edgar.iglesias@gmail.com (mailing list archive)
State New
Headers show
Series xen: mapcache: Fix unmapping of first the entry in a bucket | expand

Commit Message

Edgar E. Iglesias July 1, 2024, 10:44 p.m. UTC 
From: "Edgar E. Iglesias" <edgar.iglesias@amd.com>

Bail out in qemu_ram_block_from_host() when
xen_ram_addr_from_mapcache() does not find an existing
mapping.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
---
 system/physmem.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/system/physmem.c b/system/physmem.c
index 33d09f7571..59d1576c2b 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -2277,6 +2277,10 @@  RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
         ram_addr_t ram_addr;
         RCU_READ_LOCK_GUARD();
         ram_addr = xen_ram_addr_from_mapcache(ptr);
+        if (ram_addr == RAM_ADDR_INVALID) {
+            return NULL;
+        }
+
         block = qemu_get_ram_block(ram_addr);
         if (block) {
             *offset = ram_addr - block->offset;