tracing: Don't make assumptions about length of string on task rename

While the dest comm string size is assured to be at least TASK_COMM_LEN long,
doing a memcpy() also adds the assumption that the source is at least that
long as well, which isn't assured, and isn't true in cases such as:

	set_task_comm(worker->task, "kworker/dying");

This leads to accessing invalid memory.

Link: http://lkml.kernel.org/r/[email protected]

Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>

0 files changed, 0 insertions, 0 deletions