linux-kernel - [PATCH] resource: Use 2-factor allocator calls

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Date:   Wed, 4 Jul 2018 10:31:53 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Baoquan He <bhe@...hat.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] resource: Use 2-factor allocator calls

As already done treewide, switch from open-coded multiplication to using
2-factor allocation helpers.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 kernel/resource.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/resource.c b/kernel/resource.c
index d717acd12bf4..16debbf2d24c 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -453,7 +453,7 @@ int walk_system_ram_res_rev(u64 start, u64 end, void *arg,
 	int ret = -1;
 
 	/* create a list */
-	rams = vmalloc(sizeof(struct resource) * rams_size);
+	rams = vmalloc(array_size(rams_size, sizeof(struct resource)));
 	if (!rams)
 		return ret;
 
@@ -469,8 +469,8 @@ int walk_system_ram_res_rev(u64 start, u64 end, void *arg,
 			int rams_new_size;
 
 			rams_new_size = rams_size + 16;
-			rams_new = vmalloc(sizeof(struct resource)
-							* rams_new_size);
+			rams_new = vmalloc(array_size(rams_new_size,
+						      sizeof(struct resource)));
 			if (!rams_new)
 				goto out;
 
-- 
2.17.1


-- 
Kees Cook
Pixel Security