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| author | Namjae Jeon <linkinjeon@kernel.org> | 2021-10-15 17:14:02 +0900 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2021-10-15 09:18:29 -0500 |
| commit | 4bc59477c3298b191c72b5d99feb54a1dc8c254d (patch) | |
| tree | 39815c754c15dfa9f577f4e757aae133d5554123 /fs/ksmbd/smb2ops.c | |
| parent | dbad63001eac3abeeb2b66ddf71504e8ab128c5c (diff) | |
| download | linux-4bc59477c3298b191c72b5d99feb54a1dc8c254d.tar.bz2 | |
ksmbd: limit read/write/trans buffer size not to exceed 8MB
ksmbd limit read/write/trans buffer size not to exceed maximum 8MB.
And set the minimum value of max response buffer size to 64KB.
Windows client doesn't send session setup request if ksmbd set max
trans/read/write size lower than 64KB in smb2 negotiate.
It means windows allow at least 64 KB or more about this value.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/ksmbd/smb2ops.c')
| -rw-r--r-- | fs/ksmbd/smb2ops.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ksmbd/smb2ops.c b/fs/ksmbd/smb2ops.c index b06456eb587b..fb6a65d23139 100644 --- a/fs/ksmbd/smb2ops.c +++ b/fs/ksmbd/smb2ops.c @@ -284,6 +284,7 @@ int init_smb3_11_server(struct ksmbd_conn *conn) void init_smb2_max_read_size(unsigned int sz) { + sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE); smb21_server_values.max_read_size = sz; smb30_server_values.max_read_size = sz; smb302_server_values.max_read_size = sz; @@ -292,6 +293,7 @@ void init_smb2_max_read_size(unsigned int sz) void init_smb2_max_write_size(unsigned int sz) { + sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE); smb21_server_values.max_write_size = sz; smb30_server_values.max_write_size = sz; smb302_server_values.max_write_size = sz; @@ -300,6 +302,7 @@ void init_smb2_max_write_size(unsigned int sz) void init_smb2_max_trans_size(unsigned int sz) { + sz = clamp_val(sz, SMB3_MIN_IOSIZE, SMB3_MAX_IOSIZE); smb21_server_values.max_trans_size = sz; smb30_server_values.max_trans_size = sz; smb302_server_values.max_trans_size = sz; |