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2365c4eaf0
SMB3 servers can respond with MaxTransactSize of more than 4M that can cause a memory allocation error returned from kmalloc in a lock codepath. Also the client doesn't support multicredit requests now and allows buffer sizes of 65536 bytes only. Set MaxTransactSize to this maximum supported value. Cc: stable@vger.kernel.org # 3.7+ Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*
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* fs/cifs/smb2glob.h
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*
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* Definitions for various global variables and structures
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*
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* Copyright (C) International Business Machines Corp., 2002, 2011
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* Etersoft, 2012
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* Author(s): Steve French (sfrench@us.ibm.com)
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* Jeremy Allison (jra@samba.org)
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* Pavel Shilovsky (pshilovsky@samba.org) 2012
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU Lesser General Public License for more details.
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*
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*/
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#ifndef _SMB2_GLOB_H
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#define _SMB2_GLOB_H
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#define SMB2_MAGIC_NUMBER 0xFE534D42
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/*
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*****************************************************************
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* Constants go here
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*****************************************************************
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*/
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/*
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* Identifiers for functions that use the open, operation, close pattern
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* in smb2inode.c:smb2_open_op_close()
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*/
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#define SMB2_OP_SET_DELETE 1
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#define SMB2_OP_SET_INFO 2
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#define SMB2_OP_QUERY_INFO 3
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#define SMB2_OP_QUERY_DIR 4
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#define SMB2_OP_MKDIR 5
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#define SMB2_OP_RENAME 6
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#define SMB2_OP_DELETE 7
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#define SMB2_OP_HARDLINK 8
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#define SMB2_OP_SET_EOF 9
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/* Used when constructing chained read requests. */
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#define CHAINED_REQUEST 1
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#define START_OF_CHAIN 2
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#define END_OF_CHAIN 4
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#define RELATED_REQUEST 8
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#define SMB2_SIGNATURE_SIZE (16)
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#define SMB2_NTLMV2_SESSKEY_SIZE (16)
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#define SMB2_HMACSHA256_SIZE (32)
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#define SMB2_CMACAES_SIZE (16)
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#define SMB3_SIGNKEY_SIZE (16)
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/* Maximum buffer size value we can send with 1 credit */
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#define SMB2_MAX_BUFFER_SIZE 65536
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#endif /* _SMB2_GLOB_H */
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