Eric Dumazet 8d103b1f9c bonding: set dev->needed_headroom in bond_setup_by_slave() ... [ Upstream commit f32f193395 ] syzbot managed to crash a host by creating a bond with a GRE device. For non Ethernet device, bonding calls bond_setup_by_slave() instead of ether_setup(), and unfortunately dev->needed_headroom was not copied from the new added member. [ 171.243095] skbuff: skb_under_panic: text:ffffffffa184b9ea len:116 put:20 head:ffff883f84012dc0 data:ffff883f84012dbc tail:0x70 end:0xd00 dev:bond0 [ 171.243111] ------------[ cut here ]------------ [ 171.243112] kernel BUG at net/core/skbuff.c:112! [ 171.243117] invalid opcode: 0000 [#1] SMP KASAN PTI [ 171.243469] gsmi: Log Shutdown Reason 0x03 [ 171.243505] Call Trace: [ 171.243506] <IRQ> [ 171.243512] [<ffffffffa171be59>] skb_push+0x49/0x50 [ 171.243516] [<ffffffffa184b9ea>] ipgre_header+0x2a/0xf0 [ 171.243520] [<ffffffffa17452d7>] neigh_connected_output+0xb7/0x100 [ 171.243524] [<ffffffffa186f1d3>] ip6_finish_output2+0x383/0x490 [ 171.243528] [<ffffffffa186ede2>] __ip6_finish_output+0xa2/0x110 [ 171.243531] [<ffffffffa186acbc>] ip6_finish_output+0x2c/0xa0 [ 171.243534] [<ffffffffa186abe9>] ip6_output+0x69/0x110 [ 171.243537] [<ffffffffa186ac90>] ? ip6_output+0x110/0x110 [ 171.243541] [<ffffffffa189d952>] mld_sendpack+0x1b2/0x2d0 [ 171.243544] [<ffffffffa189d290>] ? mld_send_report+0xf0/0xf0 [ 171.243548] [<ffffffffa189c797>] mld_ifc_timer_expire+0x2d7/0x3b0 [ 171.243551] [<ffffffffa189c4c0>] ? mld_gq_timer_expire+0x50/0x50 [ 171.243556] [<ffffffffa0fea270>] call_timer_fn+0x30/0x130 [ 171.243559] [<ffffffffa0fea17c>] expire_timers+0x4c/0x110 [ 171.243563] [<ffffffffa0fea0e3>] __run_timers+0x213/0x260 [ 171.243566] [<ffffffffa0fecb7d>] ? ktime_get+0x3d/0xa0 [ 171.243570] [<ffffffffa0ff9c4e>] ? clockevents_program_event+0x7e/0xe0 [ 171.243574] [<ffffffffa0f7e5d5>] ? sched_clock_cpu+0x15/0x190 [ 171.243577] [<ffffffffa0fe973d>] run_timer_softirq+0x1d/0x40 [ 171.243581] [<ffffffffa1c00152>] __do_softirq+0x152/0x2f0 [ 171.243585] [<ffffffffa0f44e1f>] irq_exit+0x9f/0xb0 [ 171.243588] [<ffffffffa1a02e1d>] smp_apic_timer_interrupt+0xfd/0x1a0 [ 171.243591] [<ffffffffa1a01ea6>] apic_timer_interrupt+0x86/0x90 Fixes: f5184d267c ("net: Allow netdevices to specify needed head/tailroom") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-10-14 10:33:03 +02:00
..
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
bond_3ad.c	bonding/802.3ad: convert to using slave printk macros	2019-06-09 13:36:01 -07:00
bond_alb.c	bonding/alb: make sure arp header is pulled before accessing it	2020-03-18 07:17:42 +01:00
bond_debugfs.c	bonding: no need to print a message if debugfs_create_dir() fails	2019-08-10 15:25:47 -07:00
bond_main.c	bonding: set dev->needed_headroom in bond_setup_by_slave()	2020-10-14 10:33:03 +02:00
bond_netlink.c	bonding: check return value of register_netdevice() in bond_newlink()	2020-07-29 10:18:35 +02:00
bond_options.c	bonding: add missing netdev_update_lockdep_key()	2020-03-05 16:43:34 +01:00
bond_procfs.c	bonding: add an option to specify a delay between peer notifications	2019-07-04 12:30:48 -07:00
bond_sysfs.c	bonding: add an option to specify a delay between peer notifications	2019-07-04 12:30:48 -07:00
bond_sysfs_slave.c	bonding: Fix reference count leak in bond_sysfs_slave_add.	2020-06-03 08:21:38 +02:00
bonding_priv.h	net/bonding: Make DRV macros private	2015-04-26 22:59:53 -04:00