Hello, syzbot found the following crash on: HEAD commit: 84fc461d Merge tag 'for-linus-5.8-rc1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17e35a36100000 kernel config: https://syzkaller.appspot.com/x/.config?x=28f5490cd437fcf dashboard link: https://syzkaller.appspot.com/bug?extid=97028e7ff04ca4e3d85f compiler: gcc (GCC) 9.0.0 20181231 (experimental) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+97028e7ff04ca4e3d85f@xxxxxxxxxxxxxxxxxxxxxxxxx [[0;32m OK [0m] Reached target Login Prompts. [[0;32m OK [0m] Reached target Multi-User System. [[0;32m OK [0m] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [[0;32m OK [0m] Started Updat[ 68.080829][ T6736] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6736 e UTMP about Sys[ 68.090431][ T6736] caller is ext4_mb_new_blocks+0xa77/0x3b30 fs/ext4/mballoc.c:4711 tem Runlevel Cha[ 68.098400][ T6736] CPU: 0 PID: 6736 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 nges. [[0;32m OK [0m] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.243' (ECDSA) to the list of known hosts. 2020/06/10 20:51:27 fuzzer started 2020/06/10 20:51:27 connecting to host at 10.128.0.26:39073 2020/06/10 20:51:27 checking machine... 2020/06/10 20:51:27 checking revisions... 2020/06/10 20:51:27 testing simple program... 2020/06/10 20:51:29 building call list... executing program --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.