From f5cc6a224d9f41d963fa4cee35d3db2559e8015d Mon Sep 17 00:00:00 2001 From: Dor Shaish Date: Tue, 1 Jun 2010 00:04:08 -0700 Subject: [PATCH] iwlwifi: Fix null pointer referencing in iwl_dbgfs_rx_queue_read. Test for null pointer prior to access. Print "Not Allocated" if null pointer. Signed-off-by: Dor Shaish Signed-off-by: Emmanuel Grumbach Signed-off-by: Reinette Chatre --- drivers/net/wireless/iwlwifi/iwl-debugfs.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c index d9f21bb9d75d..cee3d12eb383 100644 --- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c +++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c @@ -1018,8 +1018,13 @@ static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, rxq->write); pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n", rxq->free_count); - pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n", + if (rxq->rb_stts) { + pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n", le16_to_cpu(rxq->rb_stts->closed_rb_num) & 0x0FFF); + } else { + pos += scnprintf(buf + pos, bufsz - pos, + "closed_rb_num: Not Allocated\n"); + } return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } -- 2.20.1