IA-32 support patch: mmap should return ENOMEM

IA-32 support patch: mmap should return ENOMEM

[Arun Sharma]

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Single Unix Specification says:
[ENOMEM] MAP_FIXED was specified, and the range [addr, addr + len) exceeds that allowed for the address space of a process.

Therefore if addr + len > IA32_PAGE_OFFSET, we should return ENOMEM.

Please apply to both 2.4 and 2.5.

	-Arun


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--- linux/arch/ia64/ia32/sys_ia32.c-	2003-05-27 18:49:43.000000000 -0700
+++ linux/arch/ia64/ia32/sys_ia32.c	2003-05-28 23:37:02.000000000 -0700
@@ -448,7 +448,12 @@
 		return addr;
 
 	if (len > IA32_PAGE_OFFSET || addr > IA32_PAGE_OFFSET - len)
+	{
+		if (flags & MAP_FIXED)
+			return -ENOMEM;
+		else
 		return -EINVAL;
+	}
 
 	if (OFFSET4K(offset))
 		return -EINVAL;

Re: IA-32 support patch: mmap should return ENOMEM

[Bjorn Helgaas]

On Tuesday 24 June 2003 4:21 pm, Arun Sharma wrote:
> 
> Single Unix Specification says:
> [ENOMEM] MAP_FIXED was specified, and the range [addr, addr + len) exceeds that allowed for the address space of a process.
> 
> Therefore if addr + len > IA32_PAGE_OFFSET, we should return ENOMEM.
> 
> Please apply to both 2.4 and 2.5.

Applied to 2.4 (and David put it in 2.5 as well).