[PATCH] platform/x86/intel/tpmi: Fix memory leak in mem_write() error path

[ZhaoJinming]

In mem_write(), when the IS_ALIGNED() check fails, the function returns
-EINVAL directly without freeing the 'array' allocated by
parse_int_array_user(). This causes a memory leak.

Other error paths in the same function correctly use 'goto exit_write'
to free the array before returning. Fix this inconsistency by using
the same pattern for the alignment check.

Fixes: 8e0a2fc68ec3 ("platform/x86/intel/tpmi: Use 32 bit aligned address for debugfs mem write")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: ZhaoJinming <zhaojinming@xxxxxxxxxxxxx>
---
 drivers/platform/x86/intel/vsec_tpmi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/intel/vsec_tpmi.c b/drivers/platform/x86/intel/vsec_tpmi.c
index 16fd7aa41f20..2a428bfcb209 100644
--- a/drivers/platform/x86/intel/vsec_tpmi.c
+++ b/drivers/platform/x86/intel/vsec_tpmi.c
@@ -495,8 +495,10 @@ static ssize_t mem_write(struct file *file, const char __user *userbuf, size_t l
 	addr = array[2];
 	value = array[3];
 
-	if (!IS_ALIGNED(addr, sizeof(u32)))
-		return -EINVAL;
+	if (!IS_ALIGNED(addr, sizeof(u32))) {
+		ret = -EINVAL;
+		goto exit_write;
+	}
 
 	if (punit >= pfs->pfs_header.num_entries) {
 		ret = -EINVAL;
-- 
2.20.1