Messages in this thread | | | Date | Thu, 25 Feb 2016 14:22:59 +0100 | Subject | Regression: netlink fail (triggered by iw) removes extra wlan (phy) interface | From | Rafał Miłecki <> |
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Hi,
After updating kernel in OpenWrt from 4.1.6 to 4.1.10 I noticed that if "iw" command fails (which happens very rarely) my wlan0-1 interface disappears. To trigger this problem easily I'm using this trivial script: while [ 1 ] do iw phy phy0 interface add mon0 type monitor ifconfig mon0 up iw dev mon0 del done
Whenever it goes wrong I see: Failed to connect to generic netlink. kern.info kernel: [ 1933.114338] br-lan: port 3(wlan0-1) entered disabled state kern.info kernel: [ 1933.335568] device wlan0-1 left promiscuous mode kern.info kernel: [ 1933.340385] br-lan: port 3(wlan0-1) entered disabled state daemon.notice netifd: Network device 'wlan0-1' link is down command failed: Too many open files in system (-23)
This regression is caused by commit: 4e27762 netlink: Fix autobind race condition that leads to zero port ID https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=4e27762417669cb459971635be550eb7b5598286 that is a backport of upstream: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1f770c0a09da855a2b51af6d19de97fb955eca85
This still happens with kernel 4.4.
My hardware is Linksys WRT160NL (Atheros AR9130 SoC) and I'm using two __ap interfaces on phy0 (wlan0 and wlan0-1).
Could you take a look at this? Is there some additional info I could provide to help fixing this?
-- Rafał
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