linux-kernel - [PATCH] misc/lkdtm_usercopy: Delete an error message for a failed memory allocation in do_usercopy_heap

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Date:   Tue, 9 Jan 2018 13:42:19 +0100
From:   SF Markus Elfring <elfring@...rs.sourceforge.net>
To:     kernel-janitors@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] misc/lkdtm_usercopy: Delete an error message for a failed
 memory allocation in do_usercopy_heap_whitelist()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 9 Jan 2018 13:31:43 +0100

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/misc/lkdtm_usercopy.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/misc/lkdtm_usercopy.c b/drivers/misc/lkdtm_usercopy.c
index 9725aed305bb..ed50c1db4f87 100644
--- a/drivers/misc/lkdtm_usercopy.c
+++ b/drivers/misc/lkdtm_usercopy.c
@@ -202,10 +202,8 @@ static void do_usercopy_heap_whitelist(bool to_user)
 	 * Allocate a buffer with a whitelisted window in the buffer.
 	 */
 	buf = kmem_cache_alloc(whitelist_cache, GFP_KERNEL);
-	if (!buf) {
-		pr_warn("Failed to allocate buffer from whitelist cache\n");
+	if (!buf)
 		goto free_alloc;
-	}
 
 	/* Allocate user memory we'll poke at. */
 	user_alloc = vm_mmap(NULL, 0, PAGE_SIZE,
-- 
2.15.1