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

This reverts commit aaf6160a4b7f9ee3cd91aa5b3251f5dbe2170f42.

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 2ca7a5d5ea64bb70fef2233868f272295ae1ba8e..49711776b3516d672d2195639a75f0115652d0c5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -401,7 +401,7 @@ static ssize_t amdgpu_debugfs_regs_didt_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;
 
        if (!adev->didt_wreg)