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authorPavel Shilovsky <piastry@etersoft.ru>2014-02-14 13:31:02 +0400
committerSteve French <smfrench@gmail.com>2014-02-15 02:50:47 +0400
commit2365c4eaf077c48574ab6f143960048fc0f31518 (patch)
treed710354608b5fe6a559dc5c0045ab0e6104ffe28 /fs/cifs/smb2glob.h
parent5d81de8e8667da7135d3a32a964087c0faf5483f (diff)
downloadlinux-2365c4eaf077c48574ab6f143960048fc0f31518.tar.xz
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.h3
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 */