WARNING: stack going in the wrong direction? ip=do_nanosleep (2)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 93c338c2 Merge 4.14.129 into android-4.14
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=125c3b59a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=654d6d7c478db79
dashboard link: https://syzkaller.appspot.com/bug?extid=f32f54e4e1b0a62c9469
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+f32f54...@syzkaller.appspotmail.com

WARNING: stack going in the wrong direction? ip=do_nanosleep+0x1ea/0x610


---
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[syzbot]

syzbot has found a reproducer for the following crash on:

HEAD commit: 71162e65 Merge 4.14.131 into android-4.14
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=13be19dba00000
kernel config: https://syzkaller.appspot.com/x/.config?x=55ec6ebd42d59693

dashboard link: https://syzkaller.appspot.com/bug?extid=f32f54e4e1b0a62c9469
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d16333a00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+f32f54...@syzkaller.appspotmail.com

hrtimer: interrupt took 29061 ns