linux-kernel - [PATCH] alpha: potential dereference of null pointer

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Message-ID: <202301171823476416320@zte.com.cn>
Date:   Tue, 17 Jan 2023 18:23:47 +0800 (CST)
From:   <ye.xingchen@....com.cn>
To:     <richard.henderson@...aro.org>
Cc:     <ink@...assic.park.msu.ru>, <mattst88@...il.com>,
        <linux-alpha@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <chi.minghao@....com.cn>
Subject: [PATCH] alpha: potential dereference of null pointer

From: Minghao Chi <chi.minghao@....com.cn>

The return value of kmalloc() needs to be checked.
To avoid use of null pointer in case of the failure of alloc.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
Signed-off-by: ye xingchen <ye.xingchen@....com.cn>
---
 arch/alpha/kernel/module.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/alpha/kernel/module.c b/arch/alpha/kernel/module.c
index 5b60c248de9e..5442b75a98c2 100644
--- a/arch/alpha/kernel/module.c
+++ b/arch/alpha/kernel/module.c
@@ -47,6 +47,8 @@ process_reloc_for_got(Elf64_Rela *rela,
 		}

 	g = kmalloc (sizeof (*g), GFP_KERNEL);
+	if (!g)
+		return;
 	g->next = chains[r_sym].next;
 	g->r_addend = r_addend;
 	g->got_offset = *poffset;
-- 
2.25.1