tree 4204ef5560c353f91cd275fb8303d799869dd97c
parent e502babe0a85226f2417b60a8710cf8192879180
author Anton Vorontsov <anton.vorontsov@linaro.org> 1328597391 +0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1328807010 -0800

sysrq: Properly check for kernel threads

There's a real possibility of killing kernel threads that might
have issued use_mm(), so kthread's mm might become non-NULL.

This patch fixes the issue by checking for PF_KTHREAD (just as
get_task_mm()).

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>