On 11/3/24 8:51 PM, Daniel Yang wrote: > The call stack io_sqe_buffer_register -> io_buffer_account_pin -> > headpage_already_acct results in a null ptr dereference in the for loop. > There is no guarantee that ctx->buf_table.nodes[i] is an allocated node > so add a check if null before dereferencing. Assuming this is an older tree, it's fixed in the current tree. -- Jens Axboe