powerpc/64s: Fix VAS mm use after free

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[ Upstream commit b4bda59b47 ]

The refcount on mm is dropped before the coprocessor is detached.

Reported-by: Sachin Sant <sachinp@linux.ibm.com>
Fixes: 7bc6f71bdf ("powerpc/vas: Define and use common vas_window struct")
Fixes: b22f2d88e4 ("powerpc/pseries/vas: Integrate API with open/close windows")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Tested-by: Sachin Sant <sachinp@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230607101024.14559-1-npiggin@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Nicholas Piggin 2023-06-07 20:10:24 +10:00 • committed by Greg Kroah-Hartman

parent f3daf02a41

commit 421cd15444

2 changed files with 2 additions and 2 deletions

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arch/powerpc/platforms/powernv/vas-window.c

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2

arch/powerpc/platforms/pseries/vas.c

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