This patch fixes 2 return values in mmap() to conform POSIX spec:
[EINVAL]
The value of len is zero.
[ENOMEM]
MAP_FIXED was specified, and the range [addr,addr+len) exceeds
that allowed for the address space of a process; or, if
MAP_FIXED was not specified and there is insufficient room in
the address space to effect the mapping.
--- linux-2.6.11.3/mm/mmap.c.orig 2005-03-14 13:20:11.000000000 -0800
+++ linux-2.6.11.3/mm/mmap.c 2005-03-14 17:24:37.000000000 -0800
@@ -897,12 +897,12 @@ unsigned long do_mmap_pgoff(struct file
prot |= PROT_EXEC;
if (!len)
- return addr;
+ return -EINVAL;
/* Careful about overflows.. */
len = PAGE_ALIGN(len);
if (!len || len > TASK_SIZE)
- return -EINVAL;
+ return -ENOMEM;
/* offset overflow? */
if ((pgoff + (len >> PAGE_SHIFT)) < pgoff)
-
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