On Wed, Jan 2, 2019 at 11:59 AM syzbot syzbot+42e36e1ae3de3f22a7ed@syzkaller.appspotmail.com wrote:

Hello,

syzbot found the following crash on:

HEAD commit: 903b77c63167 Merge tag 'linux-kselftest-4.21-rc1' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1424673b400000 kernel config: https://syzkaller.appspot.com/x/.config?x=53a2f2aa0b1f7606 dashboard link: https://syzkaller.appspot.com/bug?extid=42e36e1ae3de3f22a7ed compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1453eabf400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14a492bf400000

IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+42e36e1ae3de3f22a7ed@syzkaller.appspotmail.com

#syz dup: WARNING: lock held when returning to user space in set_property_atomic

RBP: 00000000006cf018 R08: 0000000000000001 R09: 0000000000000032 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000

================================================ WARNING: lock held when returning to user space! 4.20.0+ #395 Not tainted

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syz-executor520/8085 is leaving the kernel with locks still held!

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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.

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