kvm_get_dirty_log() calls copy_to_user(). So we need to narrow the dirty_log_lock spin_lock section not to include this.
Signed-off-by: Takuya Yoshikawa <[email protected]> --- arch/ia64/kvm/kvm-ia64.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 91760e8..c838671 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1817,10 +1817,12 @@ static int kvm_ia64_sync_dirty_log(struct kvm *kvm, n = kvm_dirty_bitmap_bytes(memslot); base = memslot->base_gfn / BITS_PER_LONG; + spin_lock(&kvm->arch.dirty_log_lock); for (i = 0; i < n/sizeof(long); ++i) { memslot->dirty_bitmap[i] = dirty_bitmap[base + i]; dirty_bitmap[base + i] = 0; } + spin_unlock(&kvm->arch.dirty_log_lock); r = 0; out: return r; @@ -1835,7 +1837,6 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, int is_dirty = 0; mutex_lock(&kvm->slots_lock); - spin_lock(&kvm->arch.dirty_log_lock); r = kvm_ia64_sync_dirty_log(kvm, log); if (r) @@ -1855,7 +1856,6 @@ int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, r = 0; out: mutex_unlock(&kvm->slots_lock); - spin_unlock(&kvm->arch.dirty_log_lock); return r; } -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
