Re: [BUG] skge: a possible sleep-in-atomic bug in skge_remove

David Miller
2017-12-12T13:34:52Z

From: Jia-Ju Bai <baijiaju1990@gmail.com>
Date: Tue, 12 Dec 2017 16:38:12 +0800

> According to drivers/net/ethernet/marvell/skge.c, the driver may sleep
> under a spinlock.
> The function call path is:
> skge_remove (acquire the spinlock)
> free_irq --> may sleep
>
> I do not find a good way to fix it, so I only report.
> This possible bug is found by my static analysis tool (DSAC) and
> checked by my code review.

This was added by:

commit a9e9fd7182332d0cf5f3e601df3e71dd431b70d7
Author: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue Sep 27 13:41:37 2011 -0400

skge: handle irq better on single port card

I think the free_irq() can be moved below the unlock.

Stephen, please take a look.

Thanks!