linux-kernel - [PATCH] firewire: Fix using uninitialized value

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Date:   Mon, 11 Apr 2022 10:52:05 +0000
From:   cgel.zte@...il.com
To:     stefanr@...6.in-berlin.de
Cc:     linux1394-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Lv Ruyi <lv.ruyi@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] firewire: Fix using uninitialized value

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

If data is null, request->data wouldn't be assigned value. It is random
value, but we use it in handle_exclusive_region_request() and
handle_fcp_region_request() later. Fix the bug by initializing it.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@....com.cn>
---
 drivers/firewire/core-transaction.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index e12a0a4c33f7..16ecfa7da177 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -778,7 +778,7 @@ static struct fw_request *allocate_request(struct fw_card *card,
 		return NULL;
 	}
 
-	request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
+	request = kzalloc(sizeof(*request) + length, GFP_ATOMIC);
 	if (request == NULL)
 		return NULL;
 
-- 
2.25.1