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drm/i915: Protect against leaks in pipe_crc_set_source

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Stupid userspace (there is no evil userspace in debugfs by assumption)
might provoke a leak since we allocate the new array without holding
any locks. Drop in an unconditional kfree to deal with this - kfree
can handle NULL.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
This commit is contained in:
Daniel Vetter 2014-12-10 11:00:29 +01:00
parent 9ad6d99f18
commit 64387b613a
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/i915/i915_debugfs.c
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@ -3433,6 +3433,7 @@ static int pipe_crc_set_source(struct drm_device *dev, enum pipe pipe,
hsw_disable_ips(crtc); hsw_disable_ips(crtc);
spin_lock_irq(&pipe_crc->lock); spin_lock_irq(&pipe_crc->lock);
kfree(pipe_crc->entries);
pipe_crc->entries = entries; pipe_crc->entries = entries;
pipe_crc->head = 0; pipe_crc->head = 0;
pipe_crc->tail = 0; pipe_crc->tail = 0;