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Commit f5cc6a22 authored by Dor Shaish's avatar Dor Shaish Committed by Reinette Chatre
Browse files

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: default avatarDor Shaish <dor.shaish@intel.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
parent f4989d9b

drivers/net/wireless/iwlwifi/iwl-debugfs.c

+6 −1
Original line number Original line Diff line number Diff line
@@ -1018,8 +1018,13 @@ static ssize_t iwl_dbgfs_rx_queue_read(struct file *file, 
						rxq->write);

						rxq->write);

	pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",

	pos += scnprintf(buf + pos, bufsz - pos, "free_count: %u\n",

						rxq->free_count);

						rxq->free_count);

	if (rxq->rb_stts) {

		pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",

		pos += scnprintf(buf + pos, bufsz - pos, "closed_rb_num: %u\n",

			 le16_to_cpu(rxq->rb_stts->closed_rb_num) &  0x0FFF);

			 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);

	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);

}

}