powerpc/spufs: reference context while dropping state mutex in scheduler

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Based on an original patch from Christoph Hellwig <hch@lst.de>.

Currently, there is a possible reference-after-free in the spusched
code - contexts may be freed after we have released their state_mutex
in spusched_tick and find_victim.

This change takes a reference to the context before releasing the
mutex, so that the context doesn't get destroyed.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

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This commit is contained in:

Jeremy Kerr 2008-08-14 14:59:12 +10:00

parent d9dd421fd6

commit 8d5636fbca

1 changed files with 8 additions and 1 deletions

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arch/powerpc/platforms/cell/spufs/sched.c

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