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ksmbd: Fix read on the uninitialized pointer sess 

There is a error handling case that passes control to label out_err
without pointer sess being assigned a value. The unassigned pointer
may be any garbage value and so the test of rc < 0 && sess maybe
true leading to sess being passed to the call to ksmbd_session_destroy.
Fix this by setting sess to NULL in this corner case.

Addresses-Coverity: ("Uninitialized pointer read")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Colin Ian King 2021-07-06 13:05:01 +01:00 committed by Namjae Jeon
parent 465d720485
commit 4951a84f61
1 changed files with 1 additions and 0 deletions
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fs/ksmbd/smb2pdu.c
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@ -1615,6 +1615,7 @@ int smb2_sess_setup(struct ksmbd_work *work)
} else if ((conn->dialect < SMB30_PROT_ID ||
server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
sess = NULL;
rc = -EACCES;
goto out_err;
} else {