Messages in this thread Patch in this message | | | From | Jia-Ju Bai <> | Subject | [PATCH] hippi: Fix a Fix a possible sleep-in-atomic bug in rr_close | Date | Tue, 12 Dec 2017 16:49:52 +0800 |
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The driver may sleep under a spinlock. The function call path is: rr_close (acquire the spinlock) free_irq --> may sleep
To fix it, free_irq is moved to the place without holding the spinlock.
This bug is found by my static analysis tool(DSAC) and checked by my code review.
Signed-off-by: Jia-Ju Bai <baijiaju1990@163.com> --- drivers/net/hippi/rrunner.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/hippi/rrunner.c b/drivers/net/hippi/rrunner.c index 8483f03..1ab97d9 100644 --- a/drivers/net/hippi/rrunner.c +++ b/drivers/net/hippi/rrunner.c @@ -1379,8 +1379,8 @@ static int rr_close(struct net_device *dev) rrpriv->info_dma); rrpriv->info = NULL; - free_irq(pdev->irq, dev); spin_unlock_irqrestore(&rrpriv->lock, flags); + free_irq(pdev->irq, dev); return 0; } -- 1.7.9.5
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