From: Wang Hai <wanghai38@huawei.com>
Date: Thu, 30 Jul 2020 06:36:02 +0000 (+0800)
Subject: s390/test_unwind: fix possible memleak in test_unwind()
X-Git-Tag: v5.9-rc1~39^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=75d3e7f4769d276a056efa1cc7f08de571fc9b4b;p=thirdparty%2Fkernel%2Flinux.git

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>
---

diff --git a/arch/s390/lib/test_unwind.c b/arch/s390/lib/test_unwind.c
index eb382ceaa1161..7c988994931f0 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);