diff options
Diffstat (limited to 'drivers/char/diag/diagchar_core.c')
| -rw-r--r-- | drivers/char/diag/diagchar_core.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/char/diag/diagchar_core.c b/drivers/char/diag/diagchar_core.c index 131ecba37ae3..18f8e2b11cbf 100644 --- a/drivers/char/diag/diagchar_core.c +++ b/drivers/char/diag/diagchar_core.c @@ -552,8 +552,8 @@ static int diagchar_close(struct inode *inode, struct file *file) { int ret; - DIAG_LOG(DIAG_DEBUG_USERSPACE, "diag: process exit %s\n", - current->comm); + DIAG_LOG(DIAG_DEBUG_USERSPACE, "diag: %s process exit with pid = %d\n", + current->comm, current->tgid); ret = diag_remove_client_entry(file); return ret; @@ -3259,6 +3259,8 @@ static ssize_t diagchar_read(struct file *file, char __user *buf, size_t count, int exit_stat = 0; int write_len = 0; struct diag_md_session_t *session_info = NULL; + struct pid *pid_struct = NULL; + struct task_struct *task_s = NULL; mutex_lock(&driver->diagchar_mutex); for (i = 0; i < driver->num_clients; i++) @@ -3503,8 +3505,19 @@ exit: list_for_each_safe(start, temp, &driver->dci_client_list) { entry = list_entry(start, struct diag_dci_client_tbl, track); - if (entry->client->tgid != current->tgid) + pid_struct = find_get_pid(entry->tgid); + if (!pid_struct) continue; + task_s = get_pid_task(pid_struct, PIDTYPE_PID); + if (!task_s) { + DIAG_LOG(DIAG_DEBUG_DCI, + "diag: valid task doesn't exist for pid = %d\n", + entry->tgid); + continue; + } + if (task_s == entry->client) + if (entry->client->tgid != current->tgid) + continue; if (!entry->in_service) continue; if (copy_to_user(buf + ret, &data_type, sizeof(int))) { |