[Qemu-devel] [PATCH] qemu-kvm: fix unmatched RAM alloction/free

[Xudong Hao <xudong.hao@intel.com>]

mmap is used in qemu_vmalloc function instead of qemu_memalign(commit
7dda5dc8), so it should change qemu_vfree to munmap to fix a unmatched
issue.

This issue appears when a PCI device is being assigned to KVM guest,
failure to read PCI rom file will bring RAM free, then the incorrect
qemu_vfree calling will cause a segment fault.

Signed-off-by: Xudong Hao <xudong.hao@intel.com>
---
 exec.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/exec.c b/exec.c
index fa1e0c3..d40d237 100644
--- a/exec.c
+++ b/exec.c
@@ -1152,15 +1152,11 @@ void qemu_ram_free(ram_addr_t addr)
                 abort();
 #endif
             } else {
-#if defined(TARGET_S390X) && defined(CONFIG_KVM)
-                munmap(block->host, block->length);
-#else
                 if (xen_enabled()) {
                     xen_invalidate_map_cache_entry(block->host);
                 } else {
-                    qemu_vfree(block->host);
+                    munmap(block->host, block->length);
                 }
-#endif
             }
             g_free(block);
             break;
-- 
1.5.6