linux-kernel - [PATCH 3/3] stress-shmsysv: exercise shmat with SHM

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Date:   Tue, 22 Sep 2020 12:57:30 +0530
From:   Piyush Goyal <piyushgoyaliit@...il.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] stress-shmsysv: exercise shmat with SHM_REMAP flag on NULL address

Exercise shmat syscall with SHM_REMAP flag on NULL address resulting
in EINVAL error and more kernel coverage.

Signed-off-by: Piyush Goyal <piyushgoyaliit@...il.com>
---
 stress-shm-sysv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/stress-shm-sysv.c b/stress-shm-sysv.c
index 9efaa091..e2aff788 100644
--- a/stress-shm-sysv.c
+++ b/stress-shm-sysv.c
@@ -149,6 +149,10 @@ static void exercise_shmat(int shm_id)
 
 	addr = shmat(shm_id, NULL, SHM_RND);
 	(void)addr;
+
+	/* Exercise shmat with SHM_REMAP flag on NULL address */
+	addr = shmat(shm_id, NULL, SHM_REMAP);
+	(void)addr;
 }
 
 #if defined(__linux__)
-- 
2.25.1