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-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h3
-rw-r--r--fs/ecryptfs/kthread.c9
-rw-r--r--fs/ecryptfs/main.c3
-rw-r--r--fs/ecryptfs/messaging.c18
-rw-r--r--fs/ecryptfs/miscdev.c20
5 files changed, 31 insertions, 22 deletions
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 3504cf9df35..a75026d35d1 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -691,7 +691,8 @@ int ecryptfs_init_kthread(void);
void ecryptfs_destroy_kthread(void);
int ecryptfs_privileged_open(struct file **lower_file,
struct dentry *lower_dentry,
- struct vfsmount *lower_mnt);
+ struct vfsmount *lower_mnt,
+ const struct cred *cred);
int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry);
#endif /* #ifndef ECRYPTFS_KERNEL_H */
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index c440c6b58b2..c6d7a4d748a 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -73,7 +73,7 @@ static int ecryptfs_threadfn(void *ignored)
mntget(req->lower_mnt);
(*req->lower_file) = dentry_open(
req->lower_dentry, req->lower_mnt,
- (O_RDWR | O_LARGEFILE));
+ (O_RDWR | O_LARGEFILE), current_cred());
req->flags |= ECRYPTFS_REQ_PROCESSED;
}
wake_up(&req->wait);
@@ -132,7 +132,8 @@ void ecryptfs_destroy_kthread(void)
*/
int ecryptfs_privileged_open(struct file **lower_file,
struct dentry *lower_dentry,
- struct vfsmount *lower_mnt)
+ struct vfsmount *lower_mnt,
+ const struct cred *cred)
{
struct ecryptfs_open_req *req;
int rc = 0;
@@ -143,7 +144,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
dget(lower_dentry);
mntget(lower_mnt);
(*lower_file) = dentry_open(lower_dentry, lower_mnt,
- (O_RDWR | O_LARGEFILE));
+ (O_RDWR | O_LARGEFILE), cred);
if (!IS_ERR(*lower_file))
goto out;
req = kmem_cache_alloc(ecryptfs_open_req_cache, GFP_KERNEL);
@@ -184,7 +185,7 @@ int ecryptfs_privileged_open(struct file **lower_file,
dget(lower_dentry);
mntget(lower_mnt);
(*lower_file) = dentry_open(lower_dentry, lower_mnt,
- (O_RDONLY | O_LARGEFILE));
+ (O_RDONLY | O_LARGEFILE), cred);
if (IS_ERR(*lower_file)) {
rc = PTR_ERR(*req->lower_file);
(*lower_file) = NULL;
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 64d2ba980df..fd630713c5c 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -115,6 +115,7 @@ void __ecryptfs_printk(const char *fmt, ...)
*/
int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
{
+ const struct cred *cred = current_cred();
struct ecryptfs_inode_info *inode_info =
ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
int rc = 0;
@@ -127,7 +128,7 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry);
rc = ecryptfs_privileged_open(&inode_info->lower_file,
- lower_dentry, lower_mnt);
+ lower_dentry, lower_mnt, cred);
if (rc || IS_ERR(inode_info->lower_file)) {
printk(KERN_ERR "Error opening lower persistent file "
"for lower_dentry [0x%p] and lower_mnt [0x%p]; "
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index c6983978a31..e0b0a4e28b9 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -361,6 +361,7 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
size_t msg_size;
struct nsproxy *nsproxy;
struct user_namespace *current_user_ns;
+ uid_t ctx_euid;
int rc;
if (msg->index >= ecryptfs_message_buf_len) {
@@ -385,8 +386,8 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
goto wake_up;
}
current_user_ns = nsproxy->user_ns;
- rc = ecryptfs_find_daemon_by_euid(&daemon, msg_ctx->task->euid,
- current_user_ns);
+ ctx_euid = task_euid(msg_ctx->task);
+ rc = ecryptfs_find_daemon_by_euid(&daemon, ctx_euid, current_user_ns);
rcu_read_unlock();
mutex_unlock(&ecryptfs_daemon_hash_mux);
if (rc) {
@@ -394,14 +395,14 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
printk(KERN_WARNING "%s: User [%d] received a "
"message response from process [0x%p] but does "
"not have a registered daemon\n", __func__,
- msg_ctx->task->euid, pid);
+ ctx_euid, pid);
goto wake_up;
}
- if (msg_ctx->task->euid != euid) {
+ if (ctx_euid != euid) {
rc = -EBADMSG;
printk(KERN_WARNING "%s: Received message from user "
"[%d]; expected message from user [%d]\n", __func__,
- euid, msg_ctx->task->euid);
+ euid, ctx_euid);
goto unlock;
}
if (current_user_ns != user_ns) {
@@ -415,7 +416,7 @@ int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid,
rc = -EBADMSG;
printk(KERN_ERR "%s: User [%d] sent a message response "
"from an unrecognized process [0x%p]\n",
- __func__, msg_ctx->task->euid, pid);
+ __func__, ctx_euid, pid);
goto unlock;
}
if (msg_ctx->state != ECRYPTFS_MSG_CTX_STATE_PENDING) {
@@ -464,14 +465,15 @@ ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type,
struct ecryptfs_msg_ctx **msg_ctx)
{
struct ecryptfs_daemon *daemon;
+ uid_t euid = current_euid();
int rc;
- rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
+ rc = ecryptfs_find_daemon_by_euid(&daemon, euid,
current->nsproxy->user_ns);
if (rc || !daemon) {
rc = -ENOTCONN;
printk(KERN_ERR "%s: User [%d] does not have a daemon "
- "registered\n", __func__, current->euid);
+ "registered\n", __func__, euid);
goto out;
}
mutex_lock(&ecryptfs_msg_ctx_lists_mux);
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index b484792a099..047ac609695 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -42,11 +42,12 @@ ecryptfs_miscdev_poll(struct file *file, poll_table *pt)
{
struct ecryptfs_daemon *daemon;
unsigned int mask = 0;
+ uid_t euid = current_euid();
int rc;
mutex_lock(&ecryptfs_daemon_hash_mux);
/* TODO: Just use file->private_data? */
- rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
+ rc = ecryptfs_find_daemon_by_euid(&daemon, euid,
current->nsproxy->user_ns);
BUG_ON(rc || !daemon);
mutex_lock(&daemon->mux);
@@ -83,6 +84,7 @@ static int
ecryptfs_miscdev_open(struct inode *inode, struct file *file)
{
struct ecryptfs_daemon *daemon = NULL;
+ uid_t euid = current_euid();
int rc;
mutex_lock(&ecryptfs_daemon_hash_mux);
@@ -93,10 +95,10 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file)
"count; rc = [%d]\n", __func__, rc);
goto out_unlock_daemon_list;
}
- rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
+ rc = ecryptfs_find_daemon_by_euid(&daemon, euid,
current->nsproxy->user_ns);
if (rc || !daemon) {
- rc = ecryptfs_spawn_daemon(&daemon, current->euid,
+ rc = ecryptfs_spawn_daemon(&daemon, euid,
current->nsproxy->user_ns,
task_pid(current));
if (rc) {
@@ -147,10 +149,11 @@ static int
ecryptfs_miscdev_release(struct inode *inode, struct file *file)
{
struct ecryptfs_daemon *daemon = NULL;
+ uid_t euid = current_euid();
int rc;
mutex_lock(&ecryptfs_daemon_hash_mux);
- rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
+ rc = ecryptfs_find_daemon_by_euid(&daemon, euid,
current->nsproxy->user_ns);
BUG_ON(rc || !daemon);
mutex_lock(&daemon->mux);
@@ -246,11 +249,12 @@ ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count,
char packet_length[3];
size_t i;
size_t total_length;
+ uid_t euid = current_euid();
int rc;
mutex_lock(&ecryptfs_daemon_hash_mux);
/* TODO: Just use file->private_data? */
- rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid,
+ rc = ecryptfs_find_daemon_by_euid(&daemon, euid,
current->nsproxy->user_ns);
BUG_ON(rc || !daemon);
mutex_lock(&daemon->mux);
@@ -290,7 +294,7 @@ check_list:
* message from the queue; try again */
goto check_list;
}
- BUG_ON(current->euid != daemon->euid);
+ BUG_ON(euid != daemon->euid);
BUG_ON(current->nsproxy->user_ns != daemon->user_ns);
BUG_ON(task_pid(current) != daemon->pid);
msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue,
@@ -414,6 +418,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
size_t packet_size, packet_size_length, i;
ssize_t sz = 0;
char *data;
+ uid_t euid = current_euid();
int rc;
if (count == 0)
@@ -463,8 +468,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf,
goto out_free;
}
rc = ecryptfs_miscdev_response(&data[i], packet_size,
- current->euid,
- current->nsproxy->user_ns,
+ euid, current->nsproxy->user_ns,
task_pid(current), seq);
if (rc)
printk(KERN_WARNING "%s: Failed to deliver miscdev "
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 14:44:11 +0000