powerpc/32s: Add missing call to kuep_lock on syscall entry

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Userspace Execution protection and fast syscall entry were implemented
independently from each other and were both merged in kernel 5.2,
leading to syscall entry missing userspace execution protection.

On syscall entry, execution of user space memory must be
locked in the same way as on exception entry.

Fixes: b86fb88855 ("powerpc/32: implement fast entry for syscalls on non BOOKE")
Cc: stable@vger.kernel.org
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/c65e105b63aaf74f91a14f845bc77192350b84a6.1612796617.git.christophe.leroy@csgroup.eu

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Christophe Leroy 2021-02-08 15:10:20 +00:00 • committed by Michael Ellerman

parent 57f48b4b74

commit 57fdfbce89

1 changed files with 3 additions and 0 deletions

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arch/powerpc/kernel/entry_32.S

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