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[Qemu-devel] [PATCH] Fix off-by-one in dirty bitmap functions
From: |
Avi Kivity |
Subject: |
[Qemu-devel] [PATCH] Fix off-by-one in dirty bitmap functions |
Date: |
Sun, 29 Jan 2012 16:47:47 +0200 |
Reported-by: Stefan Berger <address@hidden>
Signed-off-by: Avi Kivity <address@hidden>
---
exec-obsolete.h | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/exec-obsolete.h b/exec-obsolete.h
index 03cf35e..d2749d3 100644
--- a/exec-obsolete.h
+++ b/exec-obsolete.h
@@ -83,9 +83,10 @@ static inline void
cpu_physical_memory_set_dirty_range(ram_addr_t start,
uint8_t *p;
ram_addr_t addr, end;
- end = start + length;
+ end = TARGET_PAGE_ALIGN(start + length);
+ start &= TARGET_PAGE_MASK;
p = ram_list.phys_dirty + (start >> TARGET_PAGE_BITS);
- for (addr = start; addr <= end; addr += TARGET_PAGE_SIZE) {
+ for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
*p++ |= dirty_flags;
}
}
@@ -98,10 +99,11 @@ static inline void
cpu_physical_memory_mask_dirty_range(ram_addr_t start,
uint8_t *p;
ram_addr_t addr, end;
- end = start + length;
+ end = TARGET_PAGE_ALIGN(start + length);
+ start &= TARGET_PAGE_MASK;
mask = ~dirty_flags;
p = ram_list.phys_dirty + (start >> TARGET_PAGE_BITS);
- for (addr = start; addr <= end; addr += TARGET_PAGE_SIZE) {
+ for (addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
*p++ &= mask;
}
}
--
1.7.7.1
- [Qemu-devel] [PATCH] Fix off-by-one in dirty bitmap functions,
Avi Kivity <=