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ksmbd: Fix the missing xa_store error check

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BugLink: https://bugs.launchpad.net/bugs/2100292

commit 3abab905b14f4ba756d413f37f1fb02b708eee93 upstream.

xa_store() can fail, it return xa_err(-EINVAL) if the entry cannot
be stored in an XArray, or xa_err(-ENOMEM) if memory allocation failed,
so check error for xa_store() to fix it.

Cc: stable@vger.kernel.org
Fixes: b685757c7b ("ksmbd: Implements sess->rpc_handle_list as xarray")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CVE-2024-50284
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Jinjie Ruan
2025-02-26 22:49:14 +09:00
committed by Stefan Bader
parent dc21866837
commit eb87b3ea0a
1 changed files with 7 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/smb/server/mgmt/user_session.c
+7 -4
View File
@@ -90,7 +90,7 @@ static int __rpc_method(char *rpc_name)
int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name)
{
struct ksmbd_session_rpc *entry;
struct ksmbd_session_rpc *entry, *old;
struct ksmbd_rpc_command *resp;
int method;
@@ -106,16 +106,19 @@ int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name)
entry->id = ksmbd_ipc_id_alloc();
if (entry->id < 0)
goto free_entry;
xa_store(&sess->rpc_handle_list, entry->id, entry, GFP_KERNEL);
old = xa_store(&sess->rpc_handle_list, entry->id, entry, GFP_KERNEL);
if (xa_is_err(old))
goto free_id;
resp = ksmbd_rpc_open(sess, entry->id);
if (!resp)
goto free_id;
goto erase_xa;
kvfree(resp);
return entry->id;
free_id:
erase_xa:
xa_erase(&sess->rpc_handle_list, entry->id);
free_id:
ksmbd_rpc_id_free(entry->id);
free_entry:
kfree(entry);