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SubjectWARNING: stack recursion on stack type 2
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Hello,

syzbot found the following crash on:

HEAD commit: 1a323ea5 x86: get rid of 'errret' argument to __get_user_x..
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1688db5de00000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c1e98458335a7d1
dashboard link: https://syzkaller.appspot.com/bug?extid=a518ca2ae9f86ff95079
compiler: gcc (GCC) 9.0.0 20181231 (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+a518ca2ae9f86ff95079@syzkaller.appspotmail.com

WARNING: stack recursion on stack type 2


---
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#status for how to communicate with syzbot.

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