From: Herbert Xu <[email protected]>
Date: Fri, 18 Sep 2015 19:16:50 +0800
> The commit c0bb07df7d981e4091432754e30c9c720e2c0c78 ("netlink:
> Reset portid after netlink_insert failure") introduced a race
> condition where if two threads try to autobind the same socket
> one of them may end up with a zero port ID. This led to kernel
> deadlocks that were observed by multiple people.
>
> This patch reverts that commit and instead fixes it by introducing
> a separte rhash_portid variable so that the real portid is only set
> after the socket has been successfully hashed.
>
> Fixes: c0bb07df7d98 ("netlink: Reset portid after netlink_insert failure")
> Reported-by: Tejun Heo <[email protected]>
> Reported-by: Linus Torvalds <[email protected]>
> Signed-off-by: Herbert Xu <[email protected]>
Applied and queued up for -stable, thanks Herbert.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
