linux-kernel - [PATCH AUTOSEL 6.1 18/26] habanalabs: zero ts registration buff when allocated

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Message-Id: <20221224012930.392358-18-sashal@kernel.org>
Date:   Fri, 23 Dec 2022 20:29:22 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     farah kassabri <fkassabri@...ana.ai>,
        Oded Gabbay <ogabbay@...nel.org>,
        Sasha Levin <sashal@...nel.org>, gregkh@...uxfoundation.org,
        osharabi@...ana.ai, ynudelman@...ana.ai, ttayar@...ana.ai,
        dhirschfeld@...ana.ai
Subject: [PATCH AUTOSEL 6.1 18/26] habanalabs: zero ts registration buff when allocated

From: farah kassabri <fkassabri@...ana.ai>

[ Upstream commit 679e968908a4997d02c2a7df294e97b066f9149f ]

To avoid memory corruption in kernel memory while using timestamp
registration nodes, zero the kernel buff memory when its allocated.

Signed-off-by: farah kassabri <fkassabri@...ana.ai>
Reviewed-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Oded Gabbay <ogabbay@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/misc/habanalabs/common/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
index ef28f3b37b93..9763188dd7b0 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -2109,7 +2109,7 @@ static int hl_ts_alloc_buf(struct hl_mmap_mem_buf *buf, gfp_t gfp, void *args)
 
 	/* Allocate the internal kernel buffer */
 	size = num_elements * sizeof(struct hl_user_pending_interrupt);
-	p = vmalloc(size);
+	p = vzalloc(size);
 	if (!p)
 		goto free_user_buff;
 
-- 
2.35.1