upstream test error: BUG: using smp_processor_id() in preemptible code in corrupted

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syzbot

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Jun 11, 2020, 6:38:13 AM6/11/20
to adilger...@dilger.ca, linux...@vger.kernel.org, linux-...@vger.kernel.org, syzkall...@googlegroups.com, ty...@mit.edu
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+97028e...@syzkaller.appspotmail.com

[ [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


---
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Tetsuo Handa

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Jun 11, 2020, 7:06:34 AM6/11/20
to syzbot, syzkall...@googlegroups.com
#syz dup: linux-next test error: BUG: using smp_processor_id() in preemptible [ADDR] code: syz-fuzzer/6792

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