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| author | Jack Steiner | 2009-06-18 01:28:33 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2009-06-18 22:04:04 +0200 |
| commit | 1926ee85a903d189c5702eed6531be321e33eb47 (patch) | |
| tree | 1ae951591d3be09b86479800e2a4f03f119f4d78 /drivers/misc/sgi-gru/grukdump.c | |
| parent | gru: add user request to specify gru slice (diff) | |
| download | kernel-qcow2-linux-1926ee85a903d189c5702eed6531be321e33eb47.tar.gz kernel-qcow2-linux-1926ee85a903d189c5702eed6531be321e33eb47.tar.xz kernel-qcow2-linux-1926ee85a903d189c5702eed6531be321e33eb47.zip | |
gru: fix potential use-after-free when purging GRU tlbs
Fix potential SGI GRU bug that could cause a use-after-free. If one
thread in a task is flushing the GRU and another thread destroys the GRU
context, there is the potential to access a table after it has been freed.
Copy the gms pointer to a local variable before unlocking the gts table.
Note that no refcnt is needed for the gms - the reference is held
indirectly by the task's mm_struct.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-gru/grukdump.c')
0 files changed, 0 insertions, 0 deletions