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smb2: fix uninitialized variable bug in smb2_ioctl_query_info

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There is a potential execution path in which variable *resp_buftype*
is passed as an argument to function free_rsp_buf(), in which it is
used in a comparison without being properly initialized previously.

Fix this by initializing variable *resp_buftype* to CIFS_NO_BUFFER
in order to avoid unpredictable or unintended results.

Addresses-Coverity-ID: 1473971 ("Uninitialized scalar variable")
Fixes: c5d25bdb2967 ("cifs: add IOCTL for QUERY_INFO passthrough to userspace")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
This commit is contained in:
Gustavo A. R. Silva 2018-10-10 00:02:20 +02:00 committed by Steve French
parent f5b05d622a
commit f70556c8ca
1 changed files with 1 additions and 1 deletions
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2
fs/cifs/smb2ops.c
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@ -1133,7 +1133,7 @@ smb2_ioctl_query_info(const unsigned int xid,
struct smb_rqst rqst;
struct kvec iov[1];
struct kvec rsp_iov;
int resp_buftype;
int resp_buftype = CIFS_NO_BUFFER;
struct smb2_query_info_rsp *rsp = NULL;
void *buffer;