disp: msm: sde: add check before buffer copy

This change adds a check for the length of the buffer
before copying it to avoid a buffer overflow.

Change-Id: I9af9d422e0b3cf02c8d6662af3310337a9861a7a
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>
这个提交包含在:
Satya Rama Aditya Pinapala
2019-07-25 10:56:51 -07:00
父节点 a6bfb7fc1e
当前提交 2078f3dd2e
修改 2 个文件,包含 3 行新增0 行删除

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@@ -1102,6 +1102,7 @@ end:
if (blen <= 0)
return 0;
blen = min_t(size_t, MAX_BUFFER_SIZE, count);
if (copy_to_user(buf, buffer, blen))
return -EFAULT;
@@ -1195,6 +1196,7 @@ end:
if (blen <= 0)
return 0;
blen = min_t(size_t, MAX_BUFFER_SIZE, count);
if (copy_to_user(buf, buffer, blen))
return -EFAULT;