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cifs: fix memory leak of pneg_inbuf on -EOPNOTSUPP ioctl case

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commit 210782038b upstream.

Currently in the case where SMB2_ioctl returns the -EOPNOTSUPP error
there is a memory leak of pneg_inbuf. Fix this by returning via
the out_free_inbuf exit path that will perform the relevant kfree.

Addresses-Coverity: ("Resource leak")
Fixes: 969ae8e8d4 ("cifs: Accept validate negotiate if server return NT_STATUS_NOT_SUPPORTED")
CC: Stable <stable@vger.kernel.org> # v5.1+
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King
2019-05-17 09:12:33 +01:00
committed by Greg Kroah-Hartman
parent f6a39f877f
commit 32d57c0c06
1 changed files with 2 additions and 1 deletions
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3
fs/cifs/smb2pdu.c
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@@ -887,7 +887,8 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
* not supported error. Client should accept it.
*/
cifs_dbg(VFS, "Server does not support validate negotiate\n");
return 0;
rc = 0;
goto out_free_inbuf;
} else if (rc != 0) {
cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
rc = -EIO;