import_single_range expects the direction/rw to be where it came from, not the protection/limit. Since the import is in a write path use WRITE. Link: https://lore.kernel.org/all/2059213643.196683.1648499088753.JavaMail.zimbra@xxxxxxxxxxxx/ Reported-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> Signed-off-by: Beau Belgrave <beaub@xxxxxxxxxxxxxxxxxxx> --- kernel/trace/trace_events_user.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c index 075d694d20e3..15edbf6b1e2e 100644 --- a/kernel/trace/trace_events_user.c +++ b/kernel/trace/trace_events_user.c @@ -1245,7 +1245,8 @@ static ssize_t user_events_write(struct file *file, const char __user *ubuf, if (unlikely(*ppos != 0)) return -EFAULT; - if (unlikely(import_single_range(READ, (char *)ubuf, count, &iov, &i))) + if (unlikely(import_single_range(WRITE, (char __user *)ubuf, + count, &iov, &i))) return -EFAULT; return user_events_write_core(file, &i); -- 2.25.1
