From: David S. Miller <davem@davemloft.net>
Date: Wed, 7 May 2008 09:24:28 +0000 (-0700)
Subject: sparc: Fix mmap VA span checking.
X-Git-Tag: v2.6.26-rc2~51^2~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5816339310b2d9623cf413d33e538b45e815da5d;p=linux-2.6

sparc: Fix mmap VA span checking.

We should not conditionalize VA range checks on MAP_FIXED.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
index f188b5dc9f..e995491c44 100644
--- a/arch/sparc/kernel/sys_sparc.c
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -223,8 +223,7 @@ int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
 {
 	if (ARCH_SUN4C_SUN4 &&
 	    (len > 0x20000000 ||
-	     ((flags & MAP_FIXED) &&
-	      addr < 0xe0000000 && addr + len > 0x20000000)))
+	     (addr < 0xe0000000 && addr + len > 0x20000000)))
 		return -EINVAL;
 
 	/* See asm-sparc/uaccess.h */
diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c
index 8d4761f15f..0dbc941f13 100644
--- a/arch/sparc64/kernel/sys_sparc.c
+++ b/arch/sparc64/kernel/sys_sparc.c
@@ -549,13 +549,13 @@ int sparc64_mmap_check(unsigned long addr, unsigned long len,
 		if (len >= STACK_TOP32)
 			return -EINVAL;
 
-		if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len)
+		if (addr > STACK_TOP32 - len)
 			return -EINVAL;
 	} else {
 		if (len >= VA_EXCLUDE_START)
 			return -EINVAL;
 
-		if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len))
+		if (invalid_64bit_range(addr, len))
 			return -EINVAL;
 	}