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[Qemu-devel] [PATCH 3/7] linux-user: Use guest_start_len_valid in msync.
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 3/7] linux-user: Use guest_start_len_valid in msync. |
Date: |
Tue, 30 Mar 2010 11:49:18 -0700 |
Make sure to properly handle len = 0 first.
Signed-off-by: Richard Henderson <address@hidden>
---
linux-user/mmap.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 46923c7..f4d44a8 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -706,15 +706,18 @@ int target_msync(abi_ulong start, abi_ulong len, int
flags)
{
abi_ulong end;
- if (start & ~TARGET_PAGE_MASK)
+ if (start & ~TARGET_PAGE_MASK) {
return -EINVAL;
+ }
+ if (len == 0) {
+ return 0;
+ }
len = TARGET_PAGE_ALIGN(len);
- end = start + len;
- if (end < start)
+ if (!guest_start_len_valid(start, len)) {
return -EINVAL;
- if (end == start)
- return 0;
+ }
+ end = start + len;
start &= qemu_host_page_mask;
return msync(g2h(start), end - start, flags);
}
--
1.6.6.1
- [Qemu-devel] [PATCH 0/7] Fix tests for start+len address valid for guest, Richard Henderson, 2010/04/05
- [Qemu-devel] [PATCH 1/7] target-sparc: Fix TARGET_{PHYS, VIRT}_ADDR_SPACE_BITS., Richard Henderson, 2010/04/05
- [Qemu-devel] [PATCH 7/7] Use guest_start_len_valid in page_check_range., Richard Henderson, 2010/04/05
- [Qemu-devel] [PATCH 3/7] linux-user: Use guest_start_len_valid in msync.,
Richard Henderson <=
- [Qemu-devel] [PATCH 6/7] Fix zero-length write(2)., Richard Henderson, 2010/04/05
- [Qemu-devel] [PATCH 2/7] Add guest_start_len_valid function., Richard Henderson, 2010/04/05
- [Qemu-devel] [PATCH 5/7] linux-user: Use guest_start_len_valid in mmap., Richard Henderson, 2010/04/05
- [Qemu-devel] [PATCH 4/7] linux-user: Use guest_start_len_valid in mremap., Richard Henderson, 2010/04/05