linux-kernel - [PATCH AUTOSEL 6.4 32/58] accel/habanalabs: fix mem leak in capture user mappings

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Message-Id: <20230724011338.2298062-32-sashal@kernel.org>
Date:   Sun, 23 Jul 2023 21:13:00 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Moti Haimovski <mhaimovski@...ana.ai>,
        Dani Liberman <dliberman@...ana.ai>,
        Oded Gabbay <ogabbay@...nel.org>,
        Sasha Levin <sashal@...nel.org>, obitton@...ana.ai,
        ttayar@...ana.ai, kelbaz@...ana.ai, dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.4 32/58] accel/habanalabs: fix mem leak in capture user mappings

From: Moti Haimovski <mhaimovski@...ana.ai>

[ Upstream commit 314a7ffd7c196b27eedd50cb7553029e17789b55 ]

This commit fixes a memory leak caused when clearing the user_mappings
info when a new context is opened immediately after user_mapping is
captured and a hard reset is performed.

Signed-off-by: Moti Haimovski <mhaimovski@...ana.ai>
Reviewed-by: Dani Liberman <dliberman@...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/accel/habanalabs/common/habanalabs_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/accel/habanalabs/common/habanalabs_drv.c b/drivers/accel/habanalabs/common/habanalabs_drv.c
index 1ec97da3dddb8..70fb2df9a93b8 100644
--- a/drivers/accel/habanalabs/common/habanalabs_drv.c
+++ b/drivers/accel/habanalabs/common/habanalabs_drv.c
@@ -13,6 +13,7 @@
 
 #include <linux/pci.h>
 #include <linux/module.h>
+#include <linux/vmalloc.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/habanalabs.h>
@@ -218,6 +219,7 @@ int hl_device_open(struct inode *inode, struct file *filp)
 
 	hl_debugfs_add_file(hpriv);
 
+	vfree(hdev->captured_err_info.page_fault_info.user_mappings);
 	memset(&hdev->captured_err_info, 0, sizeof(hdev->captured_err_info));
 	atomic_set(&hdev->captured_err_info.cs_timeout.write_enable, 1);
 	hdev->captured_err_info.undef_opcode.write_enable = true;
-- 
2.39.2