diff options
| -rw-r--r-- | linux-user/mmap.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c index d0c50e4..41e0983 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -391,14 +391,23 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, } #endif - if (offset & ~TARGET_PAGE_MASK) { + if (!len) { errno = EINVAL; goto fail; } + /* Also check for overflows... */ len = TARGET_PAGE_ALIGN(len); - if (len == 0) - goto the_end; + if (!len) { + errno = ENOMEM; + goto fail; + } + + if (offset & ~TARGET_PAGE_MASK) { + errno = EINVAL; + goto fail; + } + real_start = start & qemu_host_page_mask; host_offset = offset & qemu_host_page_mask; |