From: Hugh Dickins <hugh@veritas.com>
Date: Tue, 14 Nov 2006 13:43:38 +0000 (+0000)
Subject: [PATCH] hugetlb: fix error return for brk() entering a hugepage region
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cd2579d7aa7bfc966cc271a88e77f8cfc3b0b7ba;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] hugetlb: fix error return for brk() entering a hugepage region

Commit cb07c9a1864a8eac9f3123e428100d5b2a16e65a causes the wrong return
value.  is_hugepage_only_range() is a boolean, so we should return
-EINVAL rather than 1.

Also - we can use "mm" instead of looking up "current->mm" again.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/mm/mmap.c b/mm/mmap.c
index 2526463c99a7..7b40abd7cba2 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1880,9 +1880,8 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
 	if ((addr + len) > TASK_SIZE || (addr + len) < addr)
 		return -EINVAL;
 
-	error = is_hugepage_only_range(current->mm, addr, len);
-	if (error)
-		return error;
+	if (is_hugepage_only_range(mm, addr, len))
+		return -EINVAL;
 
 	flags = VM_DATA_DEFAULT_FLAGS | VM_ACCOUNT | mm->def_flags;