diff options
| -rw-r--r-- | drivers/char/diag/diagchar_core.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/char/diag/diagchar_core.c b/drivers/char/diag/diagchar_core.c index afaedc99a4e7..5b7ac22e9eca 100644 --- a/drivers/char/diag/diagchar_core.c +++ b/drivers/char/diag/diagchar_core.c @@ -701,6 +701,11 @@ static void diag_cmd_invalidate_polling(int change_flag) driver->polling_reg_flag = 0; list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); + if (&item->entry == NULL) { + pr_err("diag: In %s, unable to search command\n", + __func__); + return; + } polling = diag_cmd_chk_polling(&item->entry); if (polling == DIAG_CMD_POLLING) { driver->polling_reg_flag = 1; @@ -842,6 +847,12 @@ void diag_cmd_remove_reg_by_pid(int pid) mutex_lock(&driver->cmd_reg_mutex); list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); + if (&item->entry == NULL) { + pr_err("diag: In %s, unable to search command\n", + __func__); + mutex_unlock(&driver->cmd_reg_mutex); + return; + } if (item->pid == pid) { list_del(&item->link); kfree(item); @@ -860,6 +871,12 @@ void diag_cmd_remove_reg_by_proc(int proc) mutex_lock(&driver->cmd_reg_mutex); list_for_each_safe(start, temp, &driver->cmd_reg_list) { item = list_entry(start, struct diag_cmd_reg_t, link); + if (&item->entry == NULL) { + pr_err("diag: In %s, unable to search command\n", + __func__); + mutex_unlock(&driver->cmd_reg_mutex); + return; + } if (item->proc == proc) { list_del(&item->link); kfree(item); |