From b11be131b73fd47e12b1a9f1c52ac0a1ed222aee Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Tue, 16 Aug 2016 20:39:52 +0200 Subject: ifplugd: if SIOCSIFFLAGS fails with ENODEV, don't die Some user managed to hit a race where iface is gone between SIOCGIFFLAGS and SIOCSIFFLAGS (!). If SIOCSIFFLAGS fails, treat it the same as failed SIOCGIFFLAGS Signed-off-by: Denys Vlasenko --- networking/ifplugd.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/networking/ifplugd.c b/networking/ifplugd.c index 28c49e2..029cba1 100644 --- a/networking/ifplugd.c +++ b/networking/ifplugd.c @@ -358,8 +358,12 @@ static void up_iface(void) ifrequest.ifr_flags |= IFF_UP; /* Let user know we mess up with interface */ bb_error_msg("upping interface"); - if (network_ioctl(SIOCSIFFLAGS, &ifrequest, "setting interface flags") < 0) - xfunc_die(); + if (network_ioctl(SIOCSIFFLAGS, &ifrequest, "setting interface flags") < 0) { + if (errno != ENODEV) + xfunc_die(); + G.iface_exists = 0; + return; + } } #if 0 /* why do we mess with IP addr? It's not our business */ -- cgit v1.1