diff options
Diffstat (limited to 'winsup/cygwin/mmap.cc')
| -rw-r--r-- | winsup/cygwin/mmap.cc | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/winsup/cygwin/mmap.cc b/winsup/cygwin/mmap.cc index dae80e4d6..2a81d8d3c 100644 --- a/winsup/cygwin/mmap.cc +++ b/winsup/cygwin/mmap.cc @@ -674,8 +674,12 @@ msync (caddr_t addr, size_t len, int flags) for (int li = 0; li < l->nrecs; ++li) { mmap_record *rec = l->recs + li; - if (rec->get_address () == addr) + if (rec->access (addr)) { + /* Check whole area given by len. */ + for (DWORD i = getpagesize (); i < len; ++i) + if (!rec->access (addr + i)) + goto invalid_address_range; fhandler_base *fh = rec->alloc_fh (); int ret = fh->msync (rec->get_handle (), addr, len, flags); rec->free_fh (fh); @@ -688,10 +692,11 @@ msync (caddr_t addr, size_t len, int flags) ReleaseResourceLock(LOCK_MMAP_LIST, WRITE_LOCK | READ_LOCK, "msync"); return 0; } - } - } - } + } + } + } +invalid_address_range: /* SUSv2: Return code if indicated memory was not mapped is ENOMEM. */ set_errno (ENOMEM); syscall_printf ("-1 = msync(): ENOMEM"); |