From 75d3e7f4769d276a056efa1cc7f08de571fc9b4b Mon Sep 17 00:00:00 2001
From: Wang Hai <wanghai38@huawei.com>
Date: Thu, 30 Jul 2020 14:36:02 +0800
Subject: s390/test_unwind: fix possible memleak in test_unwind()

test_unwind() misses to call kfree(bt) in an error path.
Add the missed function call to fix it.

Fixes: 0610154650f1 ("s390/test_unwind: print verbose unwinding results")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/lib/test_unwind.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/s390')

diff --git a/arch/s390/lib/test_unwind.c b/arch/s390/lib/test_unwind.c
index eb382ceaa116..7c988994931f 100644
--- a/arch/s390/lib/test_unwind.c
+++ b/arch/s390/lib/test_unwind.c
@@ -64,6 +64,7 @@ static noinline int test_unwind(struct task_struct *task, struct pt_regs *regs,
 			break;
 		if (state.reliable && !addr) {
 			pr_err("unwind state reliable but addr is 0\n");
+			kfree(bt);
 			return -EINVAL;
 		}
 		sprint_symbol(sym, addr);
-- 
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