BUG: MAX_LOCK_DEPTH too low! (2)

From: syzbot
Date: Tue Jun 12 2018 - 15:23:08 EST

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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@xxxxxxxxxxxxxxxxxxxxxxxxx

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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