tree fe3c1e6580ff2ccf37ff0b71010d9001fd2608b6
parent 7615c2a514788559c6684234b8fc27f3a843c2c6
author Quentin Perret <qperret@google.com> 1633436431 +0100
committer Marc Zyngier <maz@kernel.org> 1633436565 +0100

KVM: arm64: Release mmap_lock when using VM_SHARED with MTE

VM_SHARED mappings are currently forbidden in a memslot with MTE to
prevent two VMs racing to sanitise the same page. However, this check
is performed while holding current->mm's mmap_lock, but fails to release
it. Fix this by releasing the lock when needed.

Fixes: ea7fc1bb1cd1 ("KVM: arm64: Introduce MTE VM feature")
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211005122031.809857-1-qperret@google.com