diff options
| author |   ariane <ariane@openbsd.org> | 2012-04-10 10:30:44 +0000 |
|---|---|---|
| committer | ariane <ariane@openbsd.org> | 2012-04-10 10:30:44 +0000 |
| commit | 0fd1db7487cc278a669fc78965dd4d69ab8c840a (patch) | |
| tree | 368be9da008592c26d87205d46f875accb43137c | |
| parent | remove unused variable. (diff) | |
| download | wireguard-openbsd-0fd1db7487cc278a669fc78965dd4d69ab8c840a.tar.xz wireguard-openbsd-0fd1db7487cc278a669fc78965dd4d69ab8c840a.zip | |
Return EINVAL on 0-byte mmap invocation.
- Posix rules that a 0-byte mmap must return EINVAL
- our allocators are unable to distinguish between free memory and
0 bytes of allocated memory
| -rw-r--r-- | sys/uvm/uvm_mmap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/uvm/uvm_mmap.c b/sys/uvm/uvm_mmap.c index 6817224e3ce..383e25a092b 100644 --- a/sys/uvm/uvm_mmap.c +++ b/sys/uvm/uvm_mmap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: uvm_mmap.c,v 1.88 2012/03/09 13:01:29 ariane Exp $ */ +/* $OpenBSD: uvm_mmap.c,v 1.89 2012/04/10 10:30:44 ariane Exp $ */ /* $NetBSD: uvm_mmap.c,v 1.49 2001/02/18 21:19:08 chs Exp $ */ /* @@ -362,6 +362,8 @@ sys_mmap(struct proc *p, void *v, register_t *retval) flags = (flags & ~MAP_COPY) | MAP_PRIVATE; if ((flags & (MAP_SHARED|MAP_PRIVATE)) == (MAP_SHARED|MAP_PRIVATE)) return (EINVAL); + if (size == 0) + return (EINVAL); /* * align file position and save offset. adjust size. |