Alexei Starovoitov 7f29405403 net: fix rtnl notification in atomic context ... commit 991fb3f74c "dev: always advertise rx_flags changes via netlink" introduced rtnl notification from __dev_set_promiscuity(), which can be called in atomic context. Steps to reproduce: ip tuntap add dev tap1 mode tap ifconfig tap1 up tcpdump -nei tap1 & ip tuntap del dev tap1 mode tap [ 271.627994] device tap1 left promiscuous mode [ 271.639897] BUG: sleeping function called from invalid context at mm/slub.c:940 [ 271.664491] in_atomic(): 1, irqs_disabled(): 0, pid: 3394, name: ip [ 271.677525] INFO: lockdep is turned off. [ 271.690503] CPU: 0 PID: 3394 Comm: ip Tainted: G W 3.12.0-rc3+ #73 [ 271.703996] Hardware name: System manufacturer System Product Name/P8Z77 WS, BIOS 3007 07/26/2012 [ 271.731254] ffffffff81a58506 ffff8807f0d57a58 ffffffff817544e5 ffff88082fa0f428 [ 271.760261] ffff8808071f5f40 ffff8807f0d57a88 ffffffff8108bad1 ffffffff81110ff8 [ 271.790683] 0000000000000010 00000000000000d0 00000000000000d0 ffff8807f0d57af8 [ 271.822332] Call Trace: [ 271.838234] [<ffffffff817544e5>] dump_stack+0x55/0x76 [ 271.854446] [<ffffffff8108bad1>] __might_sleep+0x181/0x240 [ 271.870836] [<ffffffff81110ff8>] ? rcu_irq_exit+0x68/0xb0 [ 271.887076] [<ffffffff811a80be>] kmem_cache_alloc_node+0x4e/0x2a0 [ 271.903368] [<ffffffff810b4ddc>] ? vprintk_emit+0x1dc/0x5a0 [ 271.919716] [<ffffffff81614d67>] ? __alloc_skb+0x57/0x2a0 [ 271.936088] [<ffffffff810b4de0>] ? vprintk_emit+0x1e0/0x5a0 [ 271.952504] [<ffffffff81614d67>] __alloc_skb+0x57/0x2a0 [ 271.968902] [<ffffffff8163a0b2>] rtmsg_ifinfo+0x52/0x100 [ 271.985302] [<ffffffff8162ac6d>] __dev_notify_flags+0xad/0xc0 [ 272.001642] [<ffffffff8162ad0c>] __dev_set_promiscuity+0x8c/0x1c0 [ 272.017917] [<ffffffff81731ea5>] ? packet_notifier+0x5/0x380 [ 272.033961] [<ffffffff8162b109>] dev_set_promiscuity+0x29/0x50 [ 272.049855] [<ffffffff8172e937>] packet_dev_mc+0x87/0xc0 [ 272.065494] [<ffffffff81732052>] packet_notifier+0x1b2/0x380 [ 272.080915] [<ffffffff81731ea5>] ? packet_notifier+0x5/0x380 [ 272.096009] [<ffffffff81761c66>] notifier_call_chain+0x66/0x150 [ 272.110803] [<ffffffff8108503e>] __raw_notifier_call_chain+0xe/0x10 [ 272.125468] [<ffffffff81085056>] raw_notifier_call_chain+0x16/0x20 [ 272.139984] [<ffffffff81620190>] call_netdevice_notifiers_info+0x40/0x70 [ 272.154523] [<ffffffff816201d6>] call_netdevice_notifiers+0x16/0x20 [ 272.168552] [<ffffffff816224c5>] rollback_registered_many+0x145/0x240 [ 272.182263] [<ffffffff81622641>] rollback_registered+0x31/0x40 [ 272.195369] [<ffffffff816229c8>] unregister_netdevice_queue+0x58/0x90 [ 272.208230] [<ffffffff81547ca0>] __tun_detach+0x140/0x340 [ 272.220686] [<ffffffff81547ed6>] tun_chr_close+0x36/0x60 Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-10-25 19:03:45 -04:00
..
acpi	ACPI / PM: Drop two functions that are not used any more	2013-10-17 15:44:48 +02:00
asm-generic	mm: Fix generic hugetlb pte check return type.	2013-10-02 20:02:35 -04:00
clocksource	ARM: SoC cleanups for 3.12	2013-09-06 13:21:16 -07:00
crypto
drm	Revert "drm: mark context support as a legacy subsystem"	2013-09-20 08:32:59 +10:00
dt-bindings	ARM: dts: Fix pinctrl mask for omap3	2013-10-08 10:37:29 -07:00
keys
kvm	ARM: KVM: vgic: Bump VGIC_NR_IRQS to 256	2013-08-30 16:12:39 +03:00
linux	net: fix rtnl notification in atomic context	2013-10-25 19:03:45 -04:00
math-emu
media	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-09-05 14:54:29 -07:00
memory
misc
net	inet: remove old fragmentation hash initializing	2013-10-23 17:01:41 -04:00
pcmcia
ras
rdma	Merge branches 'cxgb4', 'flowsteer', 'ipoib', 'iser', 'mlx4', 'ocrdma' and 'qib' into for-next	2013-09-03 09:01:08 -07:00
rxrpc
scsi	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2013-09-12 16:11:45 -07:00
sound	ASoC: rcar: fixup generation checker	2013-10-11 19:52:32 +01:00
target	target/iscsi: Bump versions to v4.1.0	2013-09-10 20:23:37 -07:00
trace	Merge branch 'for-3.12/core' of git://git.kernel.dk/linux-block	2013-09-22 15:00:11 -07:00
uapi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-10-23 16:49:34 -04:00
video	fbdev changes for 3.12:	2013-09-05 09:49:32 -07:00
xen	xen-netback: enable IPv6 TCP GSO to the guest	2013-10-17 15:35:17 -04:00
Kbuild