diff options
Diffstat (limited to 'linux-user/qemu.h')
| -rw-r--r-- | linux-user/qemu.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/linux-user/qemu.h b/linux-user/qemu.h index fab287b7ec..4258e4162d 100644 --- a/linux-user/qemu.h +++ b/linux-user/qemu.h @@ -456,7 +456,9 @@ extern unsigned long guest_stack_size; static inline int access_ok(int type, abi_ulong addr, abi_ulong size) { - return page_check_range((target_ulong)addr, size, + return guest_addr_valid(addr) && + (size == 0 || guest_addr_valid(addr + size - 1)) && + page_check_range((target_ulong)addr, size, (type == VERIFY_READ) ? PAGE_READ : (PAGE_READ | PAGE_WRITE)) == 0; } |