userns: Teach trace to use from_kuid
- When tracing capture the kuid.
- When displaying the data to user space convert the kuid into the
user namespace of the process that opened the report file.
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
diff --git a/init/Kconfig b/init/Kconfig
index 6de46ef..2a388e5 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -927,7 +927,6 @@
# Features
depends on IMA = n
depends on EVM = n
- depends on TRACING = n
depends on FS_POSIX_ACL = n
depends on QUOTA = n
depends on QUOTACTL = n
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 5c38c81..c9ace83 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2060,7 +2060,8 @@
seq_puts(m, "# -----------------\n");
seq_printf(m, "# | task: %.16s-%d "
"(uid:%d nice:%ld policy:%ld rt_prio:%ld)\n",
- data->comm, data->pid, data->uid, data->nice,
+ data->comm, data->pid,
+ from_kuid_munged(seq_user_ns(m), data->uid), data->nice,
data->policy, data->rt_priority);
seq_puts(m, "# -----------------\n");
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 55e1f7f..40a6f30 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -147,7 +147,7 @@
unsigned long skipped_entries;
cycle_t preempt_timestamp;
pid_t pid;
- uid_t uid;
+ kuid_t uid;
char comm[TASK_COMM_LEN];
};