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linux/drivers/rapidio/devices
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Ioan Nicu c5157b7686 rapidio: fix rio_dma_transfer error handling 
Some of the mport_dma_req structure members were initialized late
inside the do_dma_request() function, just before submitting the
request to the dma engine. But we have some error branches before
that. In case of such an error, the code would return on the error
path and trigger the calling of dma_req_free() with a req structure
which is not completely initialized. This causes a NULL pointer
dereference in dma_req_free().

This patch fixes these error branches by making sure that all
necessary mport_dma_req structure members are initialized in
rio_dma_transfer() immediately after the request structure gets
allocated.

Link: http://lkml.kernel.org/r/20180412150605.GA31409@nokia.com
Fixes: bbd876adb8 ("rapidio: use a reference count for struct mport_dma_req")
Signed-off-by: Ioan Nicu <ioan.nicu.ext@nokia.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Acked-by: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Barry Wood <barry.wood@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Frank Kunz <frank.kunz@nokia.com>
Cc: <stable@vger.kernel.org>	[4.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-04-20 17:18:35 -07:00
..
Kconfig rapidio/tsi721: convert to modular mport driver 2013-07-03 16:08:04 -07:00
Makefile rapidio: add mport char device driver 2016-03-22 15:36:02 -07:00
rio_mport_cdev.c rapidio: fix rio_dma_transfer error handling 2018-04-20 17:18:35 -07:00
tsi721_dma.c drivers/rapidio/devices/tsi721_dma.c: adjust six checks for null pointers 2018-02-06 18:32:46 -08:00
tsi721.c rapidio/tsi721: use PCI_EXP_DEVCTL2_COMP_TIMEOUT macro 2018-02-15 18:41:06 -06:00
tsi721.h drivers/rapidio/devices/tsi721.c: make module parameter variable name unique 2017-03-31 17:13:30 -07:00