From 48ef8d42478f7d139a1da31f316b9736a75b6d79 Mon Sep 17 00:00:00 2001 From: Moti Haimovski Date: Wed, 19 Aug 2020 17:40:33 +0300 Subject: [PATCH] habanalabs: prevent user buff overflow [ Upstream commit 6396feabf7a4104a4ddfecc00b8aac535c631a66 ] This commit fixes a potential debugfs issue that may occur when reading the clock gating mask into the user buffer since the user buffer size was not taken into consideration. Signed-off-by: Moti Haimovski Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay Signed-off-by: Sasha Levin --- drivers/misc/habanalabs/debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c index 6c2b9cf45e831..650922061bdc7 100644 --- a/drivers/misc/habanalabs/debugfs.c +++ b/drivers/misc/habanalabs/debugfs.c @@ -982,7 +982,7 @@ static ssize_t hl_clk_gate_read(struct file *f, char __user *buf, return 0; sprintf(tmp_buf, "0x%llx\n", hdev->clock_gating_mask); - rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf, + rc = simple_read_from_buffer(buf, count, ppos, tmp_buf, strlen(tmp_buf) + 1); return rc; -- 2.47.3