From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- fs/smb/server/smb2ops.c | 343 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 343 insertions(+) create mode 100644 fs/smb/server/smb2ops.c (limited to 'fs/smb/server/smb2ops.c') diff --git a/fs/smb/server/smb2ops.c b/fs/smb/server/smb2ops.c new file mode 100644 index 000000000..4578291fb --- /dev/null +++ b/fs/smb/server/smb2ops.c @@ -0,0 +1,343 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2016 Namjae Jeon + * Copyright (C) 2018 Samsung Electronics Co., Ltd. + */ + +#include +#include "glob.h" + +#include "auth.h" +#include "connection.h" +#include "smb_common.h" +#include "server.h" +#include "stats.h" + +static struct smb_version_values smb21_server_values = { + .version_string = SMB21_VERSION_STRING, + .protocol_id = SMB21_PROT_ID, + .req_capabilities = SMB2_GLOBAL_CAP_LARGE_MTU, + .max_read_size = SMB21_DEFAULT_IOSIZE, + .max_write_size = SMB21_DEFAULT_IOSIZE, + .max_trans_size = SMB21_DEFAULT_IOSIZE, + .max_credits = SMB2_MAX_CREDITS, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, + .shared_lock_type = SMB2_LOCKFLAG_SHARED, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp), + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .create_lease_size = sizeof(struct create_lease), + .create_durable_size = sizeof(struct create_durable_rsp), + .create_mxac_size = sizeof(struct create_mxac_rsp), + .create_disk_id_size = sizeof(struct create_disk_id_rsp), + .create_posix_size = sizeof(struct create_posix_rsp), + .create_aapl_size = AAPL_RSP_MAX_SIZE, +}; + +static struct smb_version_values smb30_server_values = { + .version_string = SMB30_VERSION_STRING, + .protocol_id = SMB30_PROT_ID, + .req_capabilities = SMB2_GLOBAL_CAP_LARGE_MTU, + .max_read_size = SMB3_DEFAULT_IOSIZE, + .max_write_size = SMB3_DEFAULT_IOSIZE, + .max_trans_size = SMB3_DEFAULT_TRANS_SIZE, + .max_credits = SMB2_MAX_CREDITS, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, + .shared_lock_type = SMB2_LOCKFLAG_SHARED, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp), + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .create_lease_size = sizeof(struct create_lease_v2), + .create_durable_size = sizeof(struct create_durable_rsp), + .create_durable_v2_size = sizeof(struct create_durable_rsp_v2), + .create_mxac_size = sizeof(struct create_mxac_rsp), + .create_disk_id_size = sizeof(struct create_disk_id_rsp), + .create_posix_size = sizeof(struct create_posix_rsp), + .create_aapl_size = AAPL_RSP_MAX_SIZE, +}; + +static struct smb_version_values smb302_server_values = { + .version_string = SMB302_VERSION_STRING, + .protocol_id = SMB302_PROT_ID, + .req_capabilities = SMB2_GLOBAL_CAP_LARGE_MTU, + .max_read_size = SMB3_DEFAULT_IOSIZE, + .max_write_size = SMB3_DEFAULT_IOSIZE, + .max_trans_size = SMB3_DEFAULT_TRANS_SIZE, + .max_credits = SMB2_MAX_CREDITS, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, + .shared_lock_type = SMB2_LOCKFLAG_SHARED, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp), + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .create_lease_size = sizeof(struct create_lease_v2), + .create_durable_size = sizeof(struct create_durable_rsp), + .create_durable_v2_size = sizeof(struct create_durable_rsp_v2), + .create_mxac_size = sizeof(struct create_mxac_rsp), + .create_disk_id_size = sizeof(struct create_disk_id_rsp), + .create_posix_size = sizeof(struct create_posix_rsp), + .create_aapl_size = AAPL_RSP_MAX_SIZE, +}; + +static struct smb_version_values smb311_server_values = { + .version_string = SMB311_VERSION_STRING, + .protocol_id = SMB311_PROT_ID, + .req_capabilities = SMB2_GLOBAL_CAP_LARGE_MTU, + .max_read_size = SMB3_DEFAULT_IOSIZE, + .max_write_size = SMB3_DEFAULT_IOSIZE, + .max_trans_size = SMB3_DEFAULT_TRANS_SIZE, + .max_credits = SMB2_MAX_CREDITS, + .large_lock_type = 0, + .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, + .shared_lock_type = SMB2_LOCKFLAG_SHARED, + .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, + .header_size = sizeof(struct smb2_hdr), + .max_header_size = MAX_SMB2_HDR_SIZE, + .read_rsp_size = sizeof(struct smb2_read_rsp), + .lock_cmd = SMB2_LOCK, + .cap_unix = 0, + .cap_nt_find = SMB2_NT_FIND, + .cap_large_files = SMB2_LARGE_FILES, + .create_lease_size = sizeof(struct create_lease_v2), + .create_durable_size = sizeof(struct create_durable_rsp), + .create_durable_v2_size = sizeof(struct create_durable_rsp_v2), + .create_mxac_size = sizeof(struct create_mxac_rsp), + .create_disk_id_size = sizeof(struct create_disk_id_rsp), + .create_posix_size = sizeof(struct create_posix_rsp), + .create_aapl_size = AAPL_RSP_MAX_SIZE, +}; + +static struct smb_version_ops smb2_0_server_ops = { + .get_cmd_val = get_smb2_cmd_val, + .inc_reqs = ksmbd_counter_inc_reqs, + .init_rsp_hdr = init_smb2_rsp_hdr, + .set_rsp_status = set_smb2_rsp_status, + .allocate_rsp_buf = smb2_allocate_rsp_buf, + .set_rsp_credits = smb2_set_rsp_credits, + .check_user_session = smb2_check_user_session, + .get_ksmbd_tcon = smb2_get_ksmbd_tcon, + .is_sign_req = smb2_is_sign_req, + .check_sign_req = smb2_check_sign_req, + .set_sign_rsp = smb2_set_sign_rsp +}; + +static struct smb_version_ops smb3_0_server_ops = { + .get_cmd_val = get_smb2_cmd_val, + .inc_reqs = ksmbd_counter_inc_reqs, + .init_rsp_hdr = init_smb2_rsp_hdr, + .set_rsp_status = set_smb2_rsp_status, + .allocate_rsp_buf = smb2_allocate_rsp_buf, + .set_rsp_credits = smb2_set_rsp_credits, + .check_user_session = smb2_check_user_session, + .get_ksmbd_tcon = smb2_get_ksmbd_tcon, + .is_sign_req = smb2_is_sign_req, + .check_sign_req = smb3_check_sign_req, + .set_sign_rsp = smb3_set_sign_rsp, + .generate_signingkey = ksmbd_gen_smb30_signingkey, + .generate_encryptionkey = ksmbd_gen_smb30_encryptionkey, + .is_transform_hdr = smb3_is_transform_hdr, + .decrypt_req = smb3_decrypt_req, + .encrypt_resp = smb3_encrypt_resp +}; + +static struct smb_version_ops smb3_11_server_ops = { + .get_cmd_val = get_smb2_cmd_val, + .inc_reqs = ksmbd_counter_inc_reqs, + .init_rsp_hdr = init_smb2_rsp_hdr, + .set_rsp_status = set_smb2_rsp_status, + .allocate_rsp_buf = smb2_allocate_rsp_buf, + .set_rsp_credits = smb2_set_rsp_credits, + .check_user_session = smb2_check_user_session, + .get_ksmbd_tcon = smb2_get_ksmbd_tcon, + .is_sign_req = smb2_is_sign_req, + .check_sign_req = smb3_check_sign_req, + .set_sign_rsp = smb3_set_sign_rsp, + .generate_signingkey = ksmbd_gen_smb311_signingkey, + .generate_encryptionkey = ksmbd_gen_smb311_encryptionkey, + .is_transform_hdr = smb3_is_transform_hdr, + .decrypt_req = smb3_decrypt_req, + .encrypt_resp = smb3_encrypt_resp +}; + +static struct smb_version_cmds smb2_0_server_cmds[NUMBER_OF_SMB2_COMMANDS] = { + [SMB2_NEGOTIATE_HE] = { .proc = smb2_negotiate_request, }, + [SMB2_SESSION_SETUP_HE] = { .proc = smb2_sess_setup, }, + [SMB2_TREE_CONNECT_HE] = { .proc = smb2_tree_connect,}, + [SMB2_TREE_DISCONNECT_HE] = { .proc = smb2_tree_disconnect,}, + [SMB2_LOGOFF_HE] = { .proc = smb2_session_logoff,}, + [SMB2_CREATE_HE] = { .proc = smb2_open}, + [SMB2_QUERY_INFO_HE] = { .proc = smb2_query_info}, + [SMB2_QUERY_DIRECTORY_HE] = { .proc = smb2_query_dir}, + [SMB2_CLOSE_HE] = { .proc = smb2_close}, + [SMB2_ECHO_HE] = { .proc = smb2_echo}, + [SMB2_SET_INFO_HE] = { .proc = smb2_set_info}, + [SMB2_READ_HE] = { .proc = smb2_read}, + [SMB2_WRITE_HE] = { .proc = smb2_write}, + [SMB2_FLUSH_HE] = { .proc = smb2_flush}, + [SMB2_CANCEL_HE] = { .proc = smb2_cancel}, + [SMB2_LOCK_HE] = { .proc = smb2_lock}, + [SMB2_IOCTL_HE] = { .proc = smb2_ioctl}, + [SMB2_OPLOCK_BREAK_HE] = { .proc = smb2_oplock_break}, + [SMB2_CHANGE_NOTIFY_HE] = { .proc = smb2_notify}, +}; + +/** + * init_smb2_1_server() - initialize a smb server connection with smb2.1 + * command dispatcher + * @conn: connection instance + */ +void init_smb2_1_server(struct ksmbd_conn *conn) +{ + conn->vals = &smb21_server_values; + conn->ops = &smb2_0_server_ops; + conn->cmds = smb2_0_server_cmds; + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds); + conn->signing_algorithm = SIGNING_ALG_HMAC_SHA256_LE; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_LEASING; +} + +/** + * init_smb3_0_server() - initialize a smb server connection with smb3.0 + * command dispatcher + * @conn: connection instance + */ +void init_smb3_0_server(struct ksmbd_conn *conn) +{ + conn->vals = &smb30_server_values; + conn->ops = &smb3_0_server_ops; + conn->cmds = smb2_0_server_cmds; + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds); + conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_LEASING | + SMB2_GLOBAL_CAP_DIRECTORY_LEASING; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION && + conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION || + (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) && + conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL; +} + +/** + * init_smb3_02_server() - initialize a smb server connection with smb3.02 + * command dispatcher + * @conn: connection instance + */ +void init_smb3_02_server(struct ksmbd_conn *conn) +{ + conn->vals = &smb302_server_values; + conn->ops = &smb3_0_server_ops; + conn->cmds = smb2_0_server_cmds; + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds); + conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_LEASING | + SMB2_GLOBAL_CAP_DIRECTORY_LEASING; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION || + (!(server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) && + conn->cli_cap & SMB2_GLOBAL_CAP_ENCRYPTION)) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_ENCRYPTION; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL; + + /* + * Durable handles are in-memory only. Do not advertise persistent + * handles until CA recovery and fencing are implemented. + */ +} + +/** + * init_smb3_11_server() - initialize a smb server connection with smb3.11 + * command dispatcher + * @conn: connection instance + */ +int init_smb3_11_server(struct ksmbd_conn *conn) +{ + conn->vals = &smb311_server_values; + conn->ops = &smb3_11_server_ops; + conn->cmds = smb2_0_server_cmds; + conn->max_cmds = ARRAY_SIZE(smb2_0_server_cmds); + conn->signing_algorithm = SIGNING_ALG_AES_CMAC_LE; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_LEASES) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_LEASING | + SMB2_GLOBAL_CAP_DIRECTORY_LEASING; + + if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL; + + /* See init_smb3_02_server(): persistent handles require CA recovery. */ + return 0; +} + +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; + smb311_server_values.max_read_size = 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; + smb311_server_values.max_write_size = 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; + smb311_server_values.max_trans_size = sz; +} + +void init_smb2_max_credits(unsigned int sz) +{ + /* + * The command sequence window (and its backing bitmap) can track at + * most SMB2_MAX_CREDITS outstanding sequence numbers, so the number of + * credits granted on a connection must not exceed that. + */ + if (sz > SMB2_MAX_CREDITS) + sz = SMB2_MAX_CREDITS; + smb21_server_values.max_credits = sz; + smb30_server_values.max_credits = sz; + smb302_server_values.max_credits = sz; + smb311_server_values.max_credits = sz; +} -- cgit v1.3.1