diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-12-08 18:12:33 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2008-12-08 18:12:33 +0000 |
| commit | 45bc1f5264a6835239e1c183b78d40bb45310f6c (patch) | |
| tree | d2f1ea4c21aca1313b72f399cb047e19bec67f37 | |
| parent | fb1c2cd7d9a9955a98eb7c874a74122f1e964811 (diff) | |
linux-user: mmap: add check if requested memory area fits target address space
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5958 c046a42c-6fe2-441c-8c8c-71466251a162
| -rw-r--r-- | linux-user/mmap.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/linux-user/mmap.c b/linux-user/mmap.c index d5f22b82b7..2d0c684f4c 100644 --- a/linux-user/mmap.c +++ b/linux-user/mmap.c @@ -382,6 +382,16 @@ abi_long target_mmap(abi_ulong start, abi_ulong len, int prot, end = start + len; real_end = HOST_PAGE_ALIGN(end); + /* + * Test if requested memory area fits target address space + * It can fail only on 64-bit host with 32-bit target. + * On any other target/host host mmap() handles this error correctly. + */ + if ((unsigned long)start + len - 1 > (abi_ulong) -1) { + errno = EINVAL; + goto fail; + } + for(addr = real_start; addr < real_end; addr += TARGET_PAGE_SIZE) { flg = page_get_flags(addr); if (flg & PAGE_RESERVED) { |