| commit | 1926ee85a903d189c5702eed6531be321e33eb47 | |
| author | Jack Steiner <steiner@sgi.com> | |
| Wed, 17 Jun 2009 23:28:33 +0000 (17 16:28 -0700) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Thu, 18 Jun 2009 20:04:04 +0000 (18 13:04 -0700) | ||
| tree | 1ae951591d3be09b86479800e2a4f03f119f4d78 | treesnapshot (tar.gz zip) |
| parent | b1b19fcfa417cf62447413d6e8b9b6598adf00b9 | commitdiff |
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>
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>
| drivers/misc/sgi-gru/grufault.c | diffblobblamehistory |