WARNING: missing regs for base reg R10 at ip __mutex_lock

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 7d642373 ANDROID: refactor build.config files to remove du..
git tree: android-4.14
console output: https://syzkaller.appspot.com/x/log.txt?x=133374c4e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=e89a9c3deac950f9
dashboard link: https://syzkaller.appspot.com/bug?extid=e236104a07452cac179d
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10638ef8e00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+e23610...@syzkaller.appspotmail.com

audit: type=1400 audit(1571722427.041:9): avc: denied { map } for
pid=1774 comm="syz-execprog" path="/root/syzkaller-shm327400990" dev="sda1"
ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023
tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1
hrtimer: interrupt took 34451 ns
WARNING: missing regs for base reg R10 at ip __mutex_lock+0x2b/0x13e0
kernel/locking/mutex.c:892


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