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Date: Fri, 13 Jan 2012 19:46:22 +0000 From: Mans Rullgard <mans.rullgard@...aro.org> To: Javi Merino <javi.merino@....com> Cc: linux-arm-kernel@...ts.infradead.org, linaro-dev@...ts.linaro.org, patches@...aro.org, Russell King <linux@....linux.org.uk>, Jassi Brar <jaswinder.singh@...aro.org>, linux-kernel@...r.kernel.org, Boojin Kim <boojin.kim@...sung.com>, Kukjin Kim <kgene.kim@...sung.com> Subject: [PATCH] ARM: pl330: fix null pointer dereference in pl330_chan_ctrl() This fixes the thrd->req_running field being accessed before thrd is checked for null. The error was introduced in abb959f. Signed-off-by: Mans Rullgard <mans.rullgard@...aro.org> --- drivers/dma/pl330.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 3a6e042..cb3e597 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -1568,12 +1568,13 @@ static int pl330_chan_ctrl(void *ch_id, enum pl330_chan_op op) struct pl330_thread *thrd = ch_id; struct pl330_dmac *pl330; unsigned long flags; - int ret = 0, active = thrd->req_running; + int ret = 0, active; if (!thrd || thrd->free || thrd->dmac->state == DYING) return -EINVAL; pl330 = thrd->dmac; + active = thrd->req_running; spin_lock_irqsave(&pl330->lock, flags); -- 1.7.8.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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