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| author | Jia-Ju Bai <baijiaju1990@163.com> | 2017-12-12 16:49:52 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-25 11:08:04 +0100 |
| commit | e94fc847bd6e405e7c2b8849e52c102070777387 (patch) | |
| tree | d6130d86e28bd23d2f0a7de40d055b4abe54d7ac | |
| parent | 385aeea7128918b57f7a4dd70c0fa55c50c6daa3 (diff) | |
| download | talos-op-linux-e94fc847bd6e405e7c2b8849e52c102070777387.tar.gz talos-op-linux-e94fc847bd6e405e7c2b8849e52c102070777387.zip | |
hippi: Fix a Fix a possible sleep-in-atomic bug in rr_close
[ Upstream commit 6e266610eb6553cfb7e7eb5d11914bd01509c406 ]
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/hippi/rrunner.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/hippi/rrunner.c b/drivers/net/hippi/rrunner.c index 71ddadbf2368..d7ba2b813eff 100644 --- a/drivers/net/hippi/rrunner.c +++ b/drivers/net/hippi/rrunner.c @@ -1381,8 +1381,8 @@ 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; } |
