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[PATCH-for-6.1 v2] softmmu/physmem: fix wrong assertion in qemu_ram_allo
From: |
David Hildenbrand |
Subject: |
[PATCH-for-6.1 v2] softmmu/physmem: fix wrong assertion in qemu_ram_alloc_internal() |
Date: |
Thu, 5 Aug 2021 11:23:50 +0200 |
When adding RAM_NORESERVE, we forgot to remove the old assertion when
adding the updated one, most probably when reworking the patches or
rebasing. We can easily crash QEMU by adding
-object memory-backend-ram,id=mem0,size=500G,reserve=off
to the QEMU cmdline:
qemu-system-x86_64: ../softmmu/physmem.c:2146: qemu_ram_alloc_internal:
Assertion `(ram_flags & ~(RAM_SHARED | RAM_RESIZEABLE | RAM_PREALLOC))
== 0' failed.
Fix it by removing the old assertion.
Fixes: 8dbe22c6868b ("memory: Introduce RAM_NORESERVE and wire it up in
qemu_ram_mmap()")
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
v1 -> v2:
- Added rbs
- Tagged for 6.1 inclusion
---
softmmu/physmem.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/softmmu/physmem.c b/softmmu/physmem.c
index 3c1912a1a0..2e18947598 100644
--- a/softmmu/physmem.c
+++ b/softmmu/physmem.c
@@ -2143,7 +2143,6 @@ RAMBlock *qemu_ram_alloc_internal(ram_addr_t size,
ram_addr_t max_size,
RAMBlock *new_block;
Error *local_err = NULL;
- assert((ram_flags & ~(RAM_SHARED | RAM_RESIZEABLE | RAM_PREALLOC)) == 0);
assert((ram_flags & ~(RAM_SHARED | RAM_RESIZEABLE | RAM_PREALLOC |
RAM_NORESERVE)) == 0);
assert(!host ^ (ram_flags & RAM_PREALLOC));
--
2.31.1
- [PATCH-for-6.1 v2] softmmu/physmem: fix wrong assertion in qemu_ram_alloc_internal(),
David Hildenbrand <=