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| author | Pavel Shilovsky <piastry@etersoft.ru> | 2014-02-14 10:31:02 +0100 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2014-02-14 23:50:47 +0100 |
| commit | 2365c4eaf077c48574ab6f143960048fc0f31518 (patch) | |
| tree | d710354608b5fe6a559dc5c0045ab0e6104ffe28 /fs/cifs/smb2glob.h | |
| parent | cifs: ensure that uncached writes handle unmapped areas correctly (diff) | |
| download | linux-2365c4eaf077c48574ab6f143960048fc0f31518.tar.xz linux-2365c4eaf077c48574ab6f143960048fc0f31518.zip | |
CIFS: Fix too big maxBuf size for SMB3 mounts
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>
Diffstat (limited to 'fs/cifs/smb2glob.h')
| -rw-r--r-- | fs/cifs/smb2glob.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h index c38350851b08..bc0bb9c34f72 100644 --- a/fs/cifs/smb2glob.h +++ b/fs/cifs/smb2glob.h @@ -57,4 +57,7 @@ #define SMB2_CMACAES_SIZE (16) #define SMB3_SIGNKEY_SIZE (16) +/* Maximum buffer size value we can send with 1 credit */ +#define SMB2_MAX_BUFFER_SIZE 65536 + #endif /* _SMB2_GLOB_H */ |