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Commit e62f72ef authored by Siba Prasad's avatar Siba Prasad Committed by Gerrit - the friendly Code Review server
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block: test-iosched: Restrict number of bios in the test request 



num_bios is passed in test_iosched_add_wr_rd_test_req().
Restrict the number of bios to bios buffer size while preparing test
request. Otherwise, it may lead to the buffer overflow if num_bios is
larger than the size of bios buffer.

Change-Id: Ib523f2b5bd91fea7b24f3b1260ebdcb1a1b7b9ab
Signed-off-by: default avatarSiba Prasad <sibap@codeaurora.org>
parent e2fb6b5f

block/test-iosched.c

+8 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2015, 2017 The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -316,6 +316,13 @@ struct test_request *test_iosched_create_test_req( 
		goto err;

	}



	/* Restrict num_bios value as it may lead to bios_buffer overflow */

	if (num_bios >= BLK_MAX_SEGMENTS) {

		pr_warn("%s: num_bios %d is changed to BLK_MAX_SEGMENTS\n",

				__func__, num_bios);

		num_bios = BLK_MAX_SEGMENTS;

	}



	test_rq->buf_size = TEST_BIO_SIZE * num_bios;

	test_rq->wr_rd_data_pattern = pattern;