diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-25 11:16:54 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-25 11:16:54 +0200 |
| commit | ea2c1f2fff9e8c48d5dc0877a803edf916b1cfcf (patch) | |
| tree | ea0f5ba14a51d6e7f8160c63bbd84a4e0f18b1a9 /arch/loongarch/kvm/intc/pch_pic.c | |
| parent | 362f34fba309536598a02bc0541ccaeae2bc9052 (diff) | |
| parent | b0d8acc711981d712a59ee20b073cbc52a4109c5 (diff) | |
Merge v6.16.9linux-rolling-stable
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/loongarch/kvm/intc/pch_pic.c')
| -rw-r--r-- | arch/loongarch/kvm/intc/pch_pic.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/arch/loongarch/kvm/intc/pch_pic.c b/arch/loongarch/kvm/intc/pch_pic.c index ef5044796b7a..52f19dcf6b88 100644 --- a/arch/loongarch/kvm/intc/pch_pic.c +++ b/arch/loongarch/kvm/intc/pch_pic.c @@ -348,6 +348,7 @@ static int kvm_pch_pic_regs_access(struct kvm_device *dev, struct kvm_device_attr *attr, bool is_write) { + char buf[8]; int addr, offset, len = 8, ret = 0; void __user *data; void *p = NULL; @@ -397,17 +398,23 @@ static int kvm_pch_pic_regs_access(struct kvm_device *dev, return -EINVAL; } - spin_lock(&s->lock); - /* write or read value according to is_write */ if (is_write) { - if (copy_from_user(p, data, len)) - ret = -EFAULT; - } else { - if (copy_to_user(data, p, len)) - ret = -EFAULT; + if (copy_from_user(buf, data, len)) + return -EFAULT; } + + spin_lock(&s->lock); + if (is_write) + memcpy(p, buf, len); + else + memcpy(buf, p, len); spin_unlock(&s->lock); + if (!is_write) { + if (copy_to_user(data, buf, len)) + return -EFAULT; + } + return ret; } |