Revert "drm/amdgpu: add missing size check in amdgpu_debugfs_gprwave_read()"

This reverts commit 17f5f18085acb5e9d8d13d84a4e12bb3aff2bd64.

The origin mainline patch fix a buffer overflow issue in
amdgpu_debugfs_gprwave_read(), but it has not been introduced in kernel
6.1 and older kernels. This patch add a check in a wrong function in the
same file.

Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 3cca007a0cd079497a621fbd12a47b05449ff148..8a1cb1de2b13aee97a8fd6f0e07e9b70dec08377 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -396,7 +396,7 @@ static ssize_t amdgpu_debugfs_regs_pcie_write(struct file *f, const char __user
        ssize_t result = 0;
        int r;
 
-       if (size > 4096 || size & 0x3 || *pos & 0x3)
+       if (size & 0x3 || *pos & 0x3)
                return -EINVAL;
 
        r = pm_runtime_get_sync(adev_to_drm(adev)->dev);