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* BUG: MAX_LOCK_DEPTH too low! (2)
@ 2018-06-12 19:23 syzbot
  2018-07-12 21:35 ` syzbot
  0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2018-06-12 19:23 UTC (permalink / raw)
  To: davem, e, edumazet, jbenc, linux-kernel, netdev, pshelar,
	syzkaller-bugs, yi.y.yang

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: syzbot+802a5abb8abae86eb6de@syzkaller.appspotmail.com

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


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with  
syzbot.

^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: BUG: MAX_LOCK_DEPTH too low! (2)
  2018-06-12 19:23 BUG: MAX_LOCK_DEPTH too low! (2) syzbot
@ 2018-07-12 21:35 ` syzbot
  0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2018-07-12 21:35 UTC (permalink / raw)
  To: davem, e, edumazet, jbenc, linux-kernel, netdev, pshelar,
	syzkaller-bugs, yi.y.yang

syzbot has found a reproducer for the following crash on:

HEAD commit:    6e6fddc78323 bpf: fix panic due to oob in bpf_prog_test_ru..
git tree:       bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=1364db94400000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2ca6c7a31d407f86
dashboard link: https://syzkaller.appspot.com/bug?extid=802a5abb8abae86eb6de
compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=11572794400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16aff568400000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+802a5abb8abae86eb6de@syzkaller.appspotmail.com

IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
BUG: MAX_LOCK_DEPTH too low!
turning off the locking correctness validator.
depth: 48  max: 48!
48 locks held by syz-executor169/4820:
  #0: (____ptrval____) (rcu_read_lock_bh){....}, at:  
__dev_queue_xmit+0x328/0x3910 net/core/dev.c:3503
  #1: (____ptrval____) (&(&sch->seqlock)->rlock){+...}, at: spin_trylock  
include/linux/spinlock.h:320 [inline]
  #1: (____ptrval____) (&(&sch->seqlock)->rlock){+...}, at: qdisc_run_begin  
include/net/sch_generic.h:124 [inline]
  #1: (____ptrval____) (&(&sch->seqlock)->rlock){+...}, at: qdisc_run  
include/net/pkt_sched.h:117 [inline]
  #1: (____ptrval____) (&(&sch->seqlock)->rlock){+...}, at: __dev_xmit_skb  
net/core/dev.c:3229 [inline]
  #1: (____ptrval____) (&(&sch->seqlock)->rlock){+...}, at:  
__dev_queue_xmit+0x13a3/0x3910 net/core/dev.c:3537
  #2: (____ptrval____) (dev->qdisc_running_key ?: &qdisc_running_key){+...},  
at: dev_queue_xmit+0x17/0x20 net/core/dev.c:3602
  #3: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #3: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #4: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #4: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #5: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #5: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #6: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #6: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #7: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #7: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #8: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #8: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #9: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #9: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #10: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #10: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #11: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #11: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #12: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #12: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #13: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #13: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #14: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #14: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #15: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #15: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #16: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #16: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #17: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #17: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #18: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #18: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #19: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #19: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #20: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #20: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #21: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #21: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #22: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #22: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #23: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #23: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #24: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #24: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #25: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #25: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #26: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #26: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #27: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #27: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #28: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #28: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #29: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #29: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #30: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #30: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #31: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #31: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #32: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #32: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #33: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #33: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #34: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #34: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #35: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #35: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #36: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #36: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #37: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #37: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #38: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #38: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #39: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #39: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #40: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #40: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #41: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #41: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #42: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #42: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #43: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #43: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #44: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #44: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #45: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #45: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #46: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #46: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
  #47: (____ptrval____) (rcu_read_lock){....}, at: __skb_pull  
include/linux/skbuff.h:2080 [inline]
  #47: (____ptrval____) (rcu_read_lock){....}, at:  
skb_mac_gso_segment+0x229/0x740 net/core/dev.c:2787
INFO: lockdep is turned off.
CPU: 0 PID: 4820 Comm: syz-executor169 Not tainted 4.18.0-rc3+ #8
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+0x1c9/0x2b4 lib/dump_stack.c:113
  __lock_acquire+0x175d/0x5020 kernel/locking/lockdep.c:3453
  lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924
  rcu_lock_acquire include/linux/rcupdate.h:245 [inline]
  rcu_read_lock include/linux/rcupdate.h:631 [inline]
  skb_mac_gso_segment+0x263/0x740 net/core/dev.c:2789
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  nsh_gso_segment+0x470/0xb40 net/nsh/nsh.c:111
  skb_mac_gso_segment+0x3b5/0x740 net/core/dev.c:2792
  __skb_gso_segment+0x3c3/0x880 net/core/dev.c:2865
  skb_gso_segment include/linux/netdevice.h:4099 [inline]
  validate_xmit_skb+0x640/0xf30 net/core/dev.c:3104
  validate_xmit_skb_list+0xbf/0x120 net/core/dev.c:3154
  sch_direct_xmit+0x30e/0x1140 net/sched/sch_generic.c:312
  qdisc_restart net/sched/sch_generic.c:390 [inline]
  __qdisc_run+0x619/0x19f0 net/sched/sch_generic.c:398
  qdisc_run include/net/pkt_sched.h:118 [inline]
  __dev_xmit_skb net/core/dev.c:3229 [inline]
  __dev_queue_xmit+0x1419/0x3910 net/core/dev.c:3537
  dev_queue_xmit+0x17/0x20 net/core/dev.c:3602
  packet_snd net/packet/af_packet.c:2919 [inline]
  packet_sendmsg+0x428e/0x6130 net/packet/af_packet.c:2944
  sock_sendmsg_nosec net/socket.c:641 [inline]
  sock_sendmsg+0xd5/0x120 net/socket.c:651
  ___sys_sendmsg+0x7fd/0x930 net/socket.c:2125
  __sys_sendmsg+0x11d/0x290 net/socket.c:2163
  __do_sys_sendmsg net/socket.c:2172 [inline]
  __se_sys_sendmsg net/socket.c:2170 [inline]
  __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2170
  do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446a99
Code: e8 9c bb 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7  
48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff  
ff 0f 83 0b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f18672ffdb8 EFLAGS: 00000297 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dcc24 RCX: 0000000000446a99
RDX: 0000000000000000 RSI: 0000000020000480 RDI: 0000000000000004
RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000
R13: 00007ffcf80e967f R14: 00007f18673009c0 R15: 0000000000000007
==================================================================
------------[ cut here ]------------
BUG: KASAN: stack-out-of-bounds in lookup_object lib/debugobjects.c:157  
[inline]
BUG: KASAN: stack-out-of-bounds in debug_object_deactivate+0x425/0x450  
lib/debugobjects.c:540
ODEBUG: deactivate not available (active state 0) object type: hrtimer  
hint: tick_sched_timer+0x0/0x130 kernel/time/tick-sched.c:66
Read of size 8 at addr ffff8801d770f830 by task syz-executor169/4820
WARNING: CPU: 1 PID: 0 at lib/debugobjects.c:329  
debug_print_object+0x16a/0x210 lib/debugobjects.c:326



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2018-06-12 19:23 BUG: MAX_LOCK_DEPTH too low! (2) syzbot
2018-07-12 21:35 ` syzbot

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