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Message-Id: <20211209025038.2028112-1-jiasheng@iscas.ac.cn>
Date: Thu, 9 Dec 2021 10:50:38 +0800
From: Jiasheng Jiang <jiasheng@...as.ac.cn>
To: idryomov@...il.com, jlayton@...nel.org, davem@...emloft.net,
kuba@...nel.org
Cc: ceph-devel@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] libceph, ceph: potential dereference of null pointer
The return value of kzalloc() needs to be checked.
To avoid use of null pointer in case of the failure of alloc.
Fixes: 3d14c5d2b6e1 ("ceph: factor out libceph from Ceph file system")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
net/ceph/osd_client.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index ff8624a7c964..3203e8a34370 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1234,6 +1234,8 @@ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
WARN_ON(onum == CEPH_HOMELESS_OSD);
osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
+ if (!osd)
+ return NULL;
osd_init(osd);
osd->o_osdc = osdc;
osd->o_osd = onum;
--
2.25.1
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