net-next test error: BUG: using smp_processor_id() in preemptible code in corrupted

net-next test error: BUG: using smp_processor_id() in preemptible code in corrupted

Status: fixed on 2020/07/17 17:58
Fix commit: 811985365378 ext4: mballoc: Use this_cpu_read instead of this_cpu_ptr
First crash: 1435d, last: 1433d

Sample crash report:

   56.424728][ T6829] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6829

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.41' (ECDSA) to the list of known hosts.
2020/06/14 09:46:50 fuzzer started
2020/06/14 09:46:50 connecting to host at 10.128.0.26:38217
2020/06/14 09:46:50 checking machine...
2020/06/14 09:46:50 checking revisions...
2020/06/14 09:46:50 testing simple program...
2020/06/14 09:46:51 building call list...
executing program

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Manager
2020/06/14 09:47	net-next-old	96144c58abe7	2e9b5f59	.config	console log	report	ci-upstream-net-kasan-gce
2020/06/13 06:38	net-next-old	af7b4801030c	f4724dd3	.config	console log	report	ci-upstream-net-kasan-gce
2020/06/13 02:34	net-next-old	af7b4801030c	f4724dd3	.config	console log	report	ci-upstream-net-kasan-gce
2020/06/12 15:37	net-next-old	af7b4801030c	df590254	.config	console log	report	ci-upstream-net-kasan-gce

* ~~Struck through~~ repros no longer work on HEAD.