diff options
| -rw-r--r-- | fs/proc/base.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c index d53246863cfb..d8b5a1653444 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -388,14 +388,17 @@ static int proc_pid_wchan(struct seq_file *m, struct pid_namespace *ns, unsigned long wchan; char symname[KSYM_NAME_LEN]; - wchan = get_wchan(task); + if (!ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS)) + goto print0; - if (wchan && ptrace_may_access(task, PTRACE_MODE_READ_FSCREDS) - && !lookup_symbol_name(wchan, symname)) + wchan = get_wchan(task); + if (wchan && !lookup_symbol_name(wchan, symname)) { seq_printf(m, "%s", symname); - else - seq_putc(m, '0'); + return 0; + } +print0: + seq_putc(m, '0'); return 0; } #endif /* CONFIG_KALLSYMS */ |