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cifs: all initializations for tcon should happen in tcon_info_alloc 

[ Upstream commit 74ebd02163fde05baa23129e06dde4b8f0f2377a ]

Today, a few work structs inside tcon are initialized inside
cifs_get_tcon and not in tcon_info_alloc. As a result, if a tcon
is obtained from tcon_info_alloc, but not called as a part of
cifs_get_tcon, we may trip over.

Cc: <stable@vger.kernel.org>
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 739296467a59c2089477f0a709fa28bf496d4621)
This commit is contained in:
Shyam Prasad N 2025-06-30 23:09:34 +05:30 committed by Wentao Guan
parent ae5d6a1092
commit 418c35bd19
3 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
fs/smb/client/cifsproto.h
View File

@ -136,6 +136,7 @@ extern int SendReceiveBlockingLock(const unsigned int xid,
struct smb_hdr *out_buf,
int *bytes_returned);
void smb2_query_server_interfaces(struct work_struct *work);
void
cifs_signal_cifsd_for_reconnect(struct TCP_Server_Info *server,
bool all_channels);

8
fs/smb/client/connect.c
View File

@ -113,7 +113,7 @@ static int reconn_set_ipaddr_from_hostname(struct TCP_Server_Info *server)
return rc;
}
static void smb2_query_server_interfaces(struct work_struct *work)
void smb2_query_server_interfaces(struct work_struct *work)
{
int rc;
int xid;
@ -2818,20 +2818,14 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb3_fs_context *ctx)
tcon->max_cached_dirs = ctx->max_cached_dirs;
tcon->nodelete = ctx->nodelete;
tcon->local_lease = ctx->local_lease;
INIT_LIST_HEAD(&tcon->pending_opens);
tcon->status = TID_GOOD;
INIT_DELAYED_WORK(&tcon->query_interfaces,
smb2_query_server_interfaces);
if (ses->server->dialect >= SMB30_PROT_ID &&
(ses->server->capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)) {
/* schedule query interfaces poll */
queue_delayed_work(cifsiod_wq, &tcon->query_interfaces,
(SMB_INTERFACE_POLL_INTERVAL * HZ));
}
#ifdef CONFIG_CIFS_DFS_UPCALL
INIT_DELAYED_WORK(&tcon->dfs_cache_work, dfs_cache_refresh);
#endif
spin_lock(&cifs_tcp_ses_lock);
list_add(&tcon->tcon_list, &ses->tcon_list);
spin_unlock(&cifs_tcp_ses_lock);

6
fs/smb/client/misc.c
View File

@ -148,6 +148,12 @@ tcon_info_alloc(bool dir_leases_enabled, enum smb3_tcon_ref_trace trace)
#ifdef CONFIG_CIFS_DFS_UPCALL
INIT_LIST_HEAD(&ret_buf->dfs_ses_list);
#endif
INIT_LIST_HEAD(&ret_buf->pending_opens);
INIT_DELAYED_WORK(&ret_buf->query_interfaces,
smb2_query_server_interfaces);
#ifdef CONFIG_CIFS_DFS_UPCALL
INIT_DELAYED_WORK(&ret_buf->dfs_cache_work, dfs_cache_refresh);
#endif
return ret_buf;
}