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Message-ID: <20241011012241.3251128-1-ruanjinjie@huawei.com>
Date: Fri, 11 Oct 2024 09:22:41 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <john.johansen@...onical.com>, <paul@...l-moore.com>, <jmorris@...ei.org>,
<serge@...lyn.com>, <skhan@...uxfoundation.org>,
<mike.salvatore@...onical.com>, <kees@...nel.org>,
<brendan.higgins@...ux.dev>, <apparmor@...ts.ubuntu.com>,
<linux-security-module@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH] apparmor: test: Fix memory leak for aa_unpack_strdup()
The string allocated by kmemdup() in aa_unpack_strdup() is not
freed and cause following memory leaks, free them to fix it.
unreferenced object 0xffffff80c6af8a50 (size 8):
comm "kunit_try_catch", pid 225, jiffies 4294894407
hex dump (first 8 bytes):
74 65 73 74 69 6e 67 00 testing.
backtrace (crc 5eab668b):
[<0000000001e3714d>] kmemleak_alloc+0x34/0x40
[<000000006e6c7776>] __kmalloc_node_track_caller_noprof+0x300/0x3e0
[<000000006870467c>] kmemdup_noprof+0x34/0x60
[<000000001176bb03>] aa_unpack_strdup+0xd0/0x18c
[<000000008ecde918>] policy_unpack_test_unpack_strdup_with_null_name+0xf8/0x3ec
[<0000000032ef8f77>] kunit_try_run_case+0x13c/0x3ac
[<00000000f3edea23>] kunit_generic_run_threadfn_adapter+0x80/0xec
[<00000000adf936cf>] kthread+0x2e8/0x374
[<0000000041bb1628>] ret_from_fork+0x10/0x20
unreferenced object 0xffffff80c2a29090 (size 8):
comm "kunit_try_catch", pid 227, jiffies 4294894409
hex dump (first 8 bytes):
74 65 73 74 69 6e 67 00 testing.
backtrace (crc 5eab668b):
[<0000000001e3714d>] kmemleak_alloc+0x34/0x40
[<000000006e6c7776>] __kmalloc_node_track_caller_noprof+0x300/0x3e0
[<000000006870467c>] kmemdup_noprof+0x34/0x60
[<000000001176bb03>] aa_unpack_strdup+0xd0/0x18c
[<0000000046a45c1a>] policy_unpack_test_unpack_strdup_with_name+0xd0/0x3c4
[<0000000032ef8f77>] kunit_try_run_case+0x13c/0x3ac
[<00000000f3edea23>] kunit_generic_run_threadfn_adapter+0x80/0xec
[<00000000adf936cf>] kthread+0x2e8/0x374
[<0000000041bb1628>] ret_from_fork+0x10/0x20
Cc: stable@...r.kernel.org
Fixes: 4d944bcd4e73 ("apparmor: add AppArmor KUnit tests for policy unpack")
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
security/apparmor/policy_unpack_test.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/security/apparmor/policy_unpack_test.c b/security/apparmor/policy_unpack_test.c
index c64733d6c98f..f070902da8fc 100644
--- a/security/apparmor/policy_unpack_test.c
+++ b/security/apparmor/policy_unpack_test.c
@@ -281,6 +281,8 @@ static void policy_unpack_test_unpack_strdup_with_null_name(struct kunit *test)
((uintptr_t)puf->e->start <= (uintptr_t)string)
&& ((uintptr_t)string <= (uintptr_t)puf->e->end));
KUNIT_EXPECT_STREQ(test, string, TEST_STRING_DATA);
+
+ kfree(string);
}
static void policy_unpack_test_unpack_strdup_with_name(struct kunit *test)
@@ -296,6 +298,8 @@ static void policy_unpack_test_unpack_strdup_with_name(struct kunit *test)
((uintptr_t)puf->e->start <= (uintptr_t)string)
&& ((uintptr_t)string <= (uintptr_t)puf->e->end));
KUNIT_EXPECT_STREQ(test, string, TEST_STRING_DATA);
+
+ kfree(string);
}
static void policy_unpack_test_unpack_strdup_out_of_bounds(struct kunit *test)
@@ -313,6 +317,8 @@ static void policy_unpack_test_unpack_strdup_out_of_bounds(struct kunit *test)
KUNIT_EXPECT_EQ(test, size, 0);
KUNIT_EXPECT_NULL(test, string);
KUNIT_EXPECT_PTR_EQ(test, puf->e->pos, start);
+
+ kfree(string);
}
static void policy_unpack_test_unpack_nameX_with_null_name(struct kunit *test)
--
2.34.1
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