linux-kernel - [PATCH] alpha: add null pointer check

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Message-Id: <20220402083436.2413189-1-lv.ruyi@zte.com.cn>
Date:   Sat,  2 Apr 2022 08:34:36 +0000
From:   cgel.zte@...il.com
To:     rth@...ddle.net
Cc:     ink@...assic.park.msu.ru, mattst88@...il.com, lv.ruyi@....com.cn,
        linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] alpha: add null pointer check

From: Lv Ruyi <lv.ruyi@....com.cn>

kmalloc is a memory allocation function which can return NULL when some
internal memory errors happen. Add null pointer check to avoid
dereferencing null pointer.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....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