drm/i915: Fix refcount leak and possible NULL pointerdereference.

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Since get_pid_task() grabs a reference on the task_struct, we have to drop the
refcount after reading that task's comm name. Use pid_task() with RCU instead.

Also, avoid directly reading like pid_task()->comm because
pid_task() will return NULL if the task have already exit()ed.

This patch fixes both problems.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Tetsuo Handa 2014-01-03 20:42:18 +09:00 • committed by Daniel Vetter

parent d8ccba8663

commit 3ec2f427e6

1 changed files with 11 additions and 1 deletions

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drivers/gpu/drm/i915/i915_debugfs.c

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