Eric Dumazet 7f5c24cce2 vlan: free percpu stats in device destructor ... [ Upstream commit a48e5fafec ] Madalin-Cristian reported crashs happening after a recent commit (5a4ae5f6e7 "vlan: unnecessary to check if vlan_pcpu_stats is NULL") ----------------------------------------------------------------------- root@p5040ds:~# vconfig add eth8 1 root@p5040ds:~# vconfig rem eth8.1 Unable to handle kernel paging request for data at address 0x2bc88028 Faulting instruction address: 0xc058e950 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=8 CoreNet Generic Modules linked in: CPU: 3 PID: 2167 Comm: vconfig Tainted: G W 3.16.0-rc3-00346-g65e85bf #2 task: e7264d90 ti: e2c2c000 task.ti: e2c2c000 NIP: c058e950 LR: c058ea30 CTR: c058e900 REGS: e2c2db20 TRAP: 0300 Tainted: G W (3.16.0-rc3-00346-g65e85bf) MSR: 00029002 <CE,EE,ME> CR: 48000428 XER: 20000000 DEAR: 2bc88028 ESR: 00000000 GPR00: c047299c e2c2dbd0 e7264d90 00000000 2bc88000 00000000 ffffffff 00000000 GPR08: 0000000f 00000000 000000ff 00000000 28000422 10121928 10100000 10100000 GPR16: 10100000 00000000 c07c5968 00000000 00000000 00000000 e2c2dc48 e7838000 GPR24: c07c5bac c07c58a8 e77290cc c07b0000 00000000 c05de6c0 e7838000 e2c2dc48 NIP [c058e950] vlan_dev_get_stats64+0x50/0x170 LR [c058ea30] vlan_dev_get_stats64+0x130/0x170 Call Trace: [e2c2dbd0] [ffffffea] 0xffffffea (unreliable) [e2c2dc20] [c047299c] dev_get_stats+0x4c/0x140 [e2c2dc40] [c0488ca8] rtnl_fill_ifinfo+0x3d8/0x960 [e2c2dd70] [c0489f4c] rtmsg_ifinfo+0x6c/0x110 [e2c2dd90] [c04731d4] rollback_registered_many+0x344/0x3b0 [e2c2ddd0] [c047332c] rollback_registered+0x2c/0x50 [e2c2ddf0] [c0476058] unregister_netdevice_queue+0x78/0xf0 [e2c2de00] [c058d800] unregister_vlan_dev+0xc0/0x160 [e2c2de20] [c058e360] vlan_ioctl_handler+0x1c0/0x550 [e2c2de90] [c045d11c] sock_ioctl+0x28c/0x2f0 [e2c2deb0] [c010d070] do_vfs_ioctl+0x90/0x7b0 [e2c2df20] [c010d7d0] SyS_ioctl+0x40/0x80 [e2c2df40] [c000f924] ret_from_syscall+0x0/0x3c Fix this problem by freeing percpu stats from dev->destructor() instead of ndo_uninit() Reported-by: Madalin-Cristian Bucur <madalin.bucur@freescale.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Tested-by: Madalin-Cristian Bucur <madalin.bucur@freescale.com> Fixes: 5a4ae5f6e7 ("vlan: unnecessary to check if vlan_pcpu_stats is NULL") Cc: Li RongQing <roy.qing.li@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-07-28 08:08:23 -07:00
..
Kconfig	8021q: update description	2014-01-21 17:01:25 -08:00
Makefile	net/8021q: Implement Multiple VLAN Registration Protocol (MVRP)	2013-02-10 20:37:22 -05:00
vlan_core.c	8021q: fix a potential memory leak	2014-07-28 08:08:23 -07:00
vlan_dev.c	vlan: free percpu stats in device destructor	2014-07-28 08:08:23 -07:00
vlan_gvrp.c	net: vlan: prepare for 802.1ad support	2013-04-19 14:45:27 -04:00
vlan_mvrp.c	net: vlan: prepare for 802.1ad support	2013-04-19 14:45:27 -04:00
vlan_netlink.c	8021q: Convert uses of __constant_<foo> to <foo>	2014-03-12 15:28:06 -04:00
vlan.c	vlan: Fix lockdep warning with stacked vlan devices.	2014-05-16 22:14:49 -04:00
vlan.h	8021q: Convert uses of __constant_<foo> to <foo>	2014-03-12 15:28:06 -04:00
vlanproc.c	proc: Supply a function to remove a proc entry by PDE	2013-05-01 17:29:46 -04:00
vlanproc.h	[VLAN]: Add a net argument to proc init and cleanup calls.	2008-04-16 00:51:12 -07:00