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Date: Fri, 19 Aug 2011 12:26:30 +0200 From: Kay Sievers <kay.sievers@...y.org> To: "Eric W. Biederman" <ebiederm@...ssion.com> Cc: device-mapper development <dm-devel@...hat.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, "David S. Miller" <davem@...emloft.net> Subject: Re: [dm-devel] clone() with CLONE_NEWNET breaks kobject_uevent_env() On Fri, Aug 19, 2011 at 11:13, Eric W. Biederman <ebiederm@...ssion.com> wrote: > Milan Broz <mbroz@...hat.com> writes: >> If you run clone() with CLONE_NEWNET (which is chromium using >> for sanboxing), udev namespace is cloned too (newly registered >> in uevent_sock_list) and netlink send (except the first in list) >> fails with -ESRCH. >> >> This causes that _every_ call of kobject_uevent_env() return failure. > That netlink_ broadcast chooses to treat failure to deliver a packet to > anyone as an error and return -ESRCH is a little peculiar. In general > we don't see that error because when you are testing there is at least > one listener on the netlink socket. So as a practical matter I think > we should be ignoring return values of -ESRCH from netlink_broadcast, > in kobject_uevent_env. Wouldn't a wrap in netlink_has_listeners() help before we try to send it? Kay -- 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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