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drm/amdgpu: add buf length check

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add buf length check before using it to access data

Signed-off-by: Gangliang Xie <ganglxie@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Gangliang Xie 2026-06-16 17:04:47 +08:00 committed by Alex Deucher
parent 296ebc46de
commit 473f99e4a2
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/amd/amdgpu/amdgpu_psp_ta.c
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@ -166,7 +166,8 @@ static ssize_t ta_if_load_debugfs_write(struct file *fp, const char *buf, size_t
if (ret)
return -EFAULT;
if (ta_bin_len > PSP_1_MEG)
if (ta_bin_len < sizeof(struct common_firmware_header) ||
ta_bin_len > PSP_1_MEG)
return -EINVAL;
copy_pos += sizeof(uint32_t);
@ -321,6 +322,8 @@ static ssize_t ta_if_invoke_debugfs_write(struct file *fp, const char *buf, size
ret = copy_from_user((void *)&shared_buf_len, &buf[copy_pos], sizeof(uint32_t));
if (ret)
return -EFAULT;
if (!shared_buf_len || shared_buf_len > PSP_1_MEG)
return -EINVAL;
copy_pos += sizeof(uint32_t);
shared_buf = memdup_user(&buf[copy_pos], shared_buf_len);