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* [Linux-kernel-mentees] [PATCH] infiniband: Fix uninit-value in ucma_connect()
@ 2020-07-25 19:48 Peilin Ye
  2020-07-25 22:02 ` [Linux-kernel-mentees] [PATCH] infiniband: Prevent uninit-value in ucma_accept() Peilin Ye
  0 siblings, 1 reply; 4+ messages in thread
From: Peilin Ye @ 2020-07-25 19:48 UTC (permalink / raw)
  To: Doug Ledford, Jason Gunthorpe
  Cc: Peilin Ye, Leon Romanovsky, Greg Kroah-Hartman, syzkaller-bugs,
	linux-kernel-mentees, linux-rdma, linux-kernel

ucma_connect() is reading uninitialized memory when `in_len` is less than
`offsetof(struct rdma_ucm_connect, ece)`. Fix it.

Reported-and-tested-by: syzbot+7446526858b83c8828b2@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=2c85ca2b1aedb22ed1029383751e36cee3f7d047
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
---
 drivers/infiniband/core/ucma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 5b87eee8ccc8..a591fdccdce0 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1079,7 +1079,7 @@ static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
 {
 	struct rdma_conn_param conn_param;
 	struct rdma_ucm_ece ece = {};
-	struct rdma_ucm_connect cmd;
+	struct rdma_ucm_connect cmd = {};
 	struct ucma_context *ctx;
 	size_t in_size;
 	int ret;
-- 
2.25.1


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2020-07-25 19:48 [Linux-kernel-mentees] [PATCH] infiniband: Fix uninit-value in ucma_connect() Peilin Ye
2020-07-25 22:02 ` [Linux-kernel-mentees] [PATCH] infiniband: Prevent uninit-value in ucma_accept() Peilin Ye
2020-07-26  2:27   ` [Linux-kernel-mentees] [PATCH v2] " Peilin Ye
2020-07-27 14:58     ` Jason Gunthorpe

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