diff options
| -rw-r--r-- | drivers/gpu/drm/msm/sde_dbg.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/sde_dbg.c b/drivers/gpu/drm/msm/sde_dbg.c index c886950e5212..93c4c1e27b0d 100644 --- a/drivers/gpu/drm/msm/sde_dbg.c +++ b/drivers/gpu/drm/msm/sde_dbg.c @@ -1643,6 +1643,11 @@ static ssize_t sde_evtlog_dump_read(struct file *file, char __user *buff, len = sde_evtlog_dump_to_buffer(sde_dbg_base.evtlog, evtlog_buf, SDE_EVTLOG_BUF_MAX, true); + if (len < 0 || len > count) { + pr_err("len is more than user buffer size"); + return 0; + } + if (copy_to_user(buff, evtlog_buf, len)) return -EFAULT; *ppos += len; |