Subject: BUG: MAX_LOCK_DEPTH too low! (2)

From: syzbot <[email-masked]>
Date: Tue, 12 Jun 2018 12:23:02 -0700

Hello,

syzbot found the following crash on:

HEAD commit:    ae40832e53c3 bpfilter: fix a build err
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17094ed7800000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7db1a87249322f90
dashboard link: https://syzkaller.appspot.com/bug?extid=802a5abb8abae86eb6de
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: [email-masked]

BUG: MAX_LOCK_DEPTH too low!
turning off the locking correctness validator.
depth: 48  max: 48!
48 locks held by syz-executor6/30643:
  #0: 00000000ac2541d7 (rcu_read_lock_bh){....}, at:  
__dev_queue_xmit+0x323/0x3900 net/core/dev.c:3521
  #1: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #1: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #2: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #2: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #3: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #3: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #4: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #4: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #5: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #5: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #6: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #6: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #7: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #7: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #8: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #8: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #9: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #9: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
netlink: 8 bytes leftover after parsing attributes in process  
`syz-executor5'.
  #10: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #10: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #11: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #11: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #12: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #12: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #13: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #13: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #14: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #14: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #15: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #15: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #16: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #16: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
netlink: 8 bytes leftover after parsing attributes in process  
`syz-executor5'.
  #17: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #17: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #18: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #18: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #19: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #19: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #20: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #20: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #21: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #21: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #22: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #22: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #23: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #23: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #24: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #24: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #25: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #25: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #26: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #26: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #27: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #27: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #28: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #28: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #29: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #29: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #30: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #30: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #31: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #31: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #32: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #32: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #33: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #33: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #34: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #34: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #35: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #35: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #36: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #36: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #37: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #37: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #38: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #38: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #39: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #39: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #40: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #40: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #41: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #41: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #42: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #42: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #43: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #43: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #44: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #44: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #45: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #45: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #46: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #46: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
  #47: 00000000c22902c0 (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2082 [inline]
  #47: 00000000c22902c0 (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x221/0x720 net/core/dev.c:2787
INFO: lockdep is turned off.
CPU: 1 PID: 30643 Comm: syz-executor6 Not tainted 4.17.0-rc6+ #68
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
Call Trace:
  __dump_stack lib/dump_stack.c:77 [inline]
  dump_stack+0x1b9/0x294 lib/dump_stack.c:113
  __lock_acquire+0x1788/0x5140 kernel/locking/lockdep.c:3449
  lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920
  rcu_lock_acquire include/linux/rcupdate.h:246 [inline]
  rcu_read_lock include/linux/rcupdate.h:632 [inline]
  skb_mac_gso_segment+0x25b/0x720 net/core/dev.c:2789
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3ad/0x720 net/core/dev.c:2792
  __skb_gso_segment+0x3bb/0x870 net/core/dev.c:2865
  skb_gso_segment include/linux/netdevice.h:4072 [inline]
  validate_xmit_skb+0x54d/0xd90 net/core/dev.c:3122
  __dev_queue_xmit+0xc0c/0x3900 net/core/dev.c:3579
  dev_queue_xmit+0x17/0x20 net/core/dev.c:3620
  packet_snd net/packet/af_packet.c:2921 [inline]
  packet_sendmsg+0x4275/0x6100 net/packet/af_packet.c:2946
  sock_sendmsg_nosec net/socket.c:629 [inline]
  sock_sendmsg+0xd5/0x120 net/socket.c:639
  __sys_sendto+0x3d7/0x670 net/socket.c:1789
  __do_sys_sendto net/socket.c:1801 [inline]
  __se_sys_sendto net/socket.c:1797 [inline]
  __x64_sys_sendto+0xe1/0x1a0 net/socket.c:1797
  do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455a09
RSP: 002b:00007f125b3edc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f125b3ee6d4 RCX: 0000000000455a09
RDX: 0000000000000176 RSI: 00000000200000c0 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000020000080 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000005d8 R14: 00000000006fdce0 R15: 0000000000000000
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
    (ftrace buffer empty)
Modules linked in:
CPU: 1 PID: 30643 Comm: syz-executor6 Not tainted 4.17.0-rc6+ #68
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS  
Google 01/01/2011
RIP: 0010:skb_reset_network_header include/linux/skbuff.h:2306 [inline]
RIP: 0010:nsh_gso_segment+0x3a/0xb40 net/nsh/nsh.c:87
RSP: 0018:ffff8801aa585f98 EFLAGS: 00010a06
RAX: dffffc0000000000 RBX: ffffffff897e00e0 RCX: 1fecbfffffde10cc
RDX: ffffed00354b0c22 RSI: ffffffff876a7afd RDI: ff65fffffef0858b
RBP: ffff8801aa586020 R08: ffff880198924600 R09: 0000000000000000
R10: fffffbfff12ea1dc R11: ffff880198924600 R12: ff65fffffef0858b
R13: dffffc0000000000 R14: 0000000000004f89 R15: 0000000000004f89
FS:  00007f125b3ee700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
kasan: CONFIG_KASAN_INLINE enabled
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200002c0 CR3: 00000001d8346000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Code:
------------[ cut here ]------------
kasan: GPF could be caused by NULL-ptr deref or user memory access
Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected  
to SLAB object 'vm_area_struct' (offset 119, size 1)!
WARNING: CPU: 1 PID: 30643 at mm/usercopy.c:81 usercopy_warn+0xf5/0x120  
mm/usercopy.c:76

---
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