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BUG: KCSAN: data-race in padata_find_next / padata_reorder

write to 0xffff88812b01b568 of 4 bytes by task 7957 on cpu 0:
 padata_find_next+0x1d9/0x260 kernel/padata.c:204
 padata_reorder+0x180/0x260 kernel/padata.c:233
 padata_do_serial+0x181/0x1b0 kernel/padata.c:340
 pcrypt_aead_enc+0x51/0x80 crypto/pcrypt.c:81
 padata_parallel_worker+0x1ae/0x220 kernel/padata.c:81
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264
 worker_thread+0xa0/0x800 kernel/workqueue.c:2410
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffff88812b01b568 of 4 bytes by task 24772 on cpu 1:
 padata_reorder+0x1b6/0x260 kernel/padata.c:265
 padata_do_serial+0x181/0x1b0 kernel/padata.c:340
 pcrypt_aead_enc+0x51/0x80 crypto/pcrypt.c:81
 padata_parallel_worker+0x1ae/0x220 kernel/padata.c:81
 process_one_work+0x3d4/0x890 kernel/workqueue.c:2264
 worker_thread+0xa0/0x800 kernel/workqueue.c:2410
 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 24772 Comm: kworker/u4:2 Not tainted 5.5.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt_parallel padata_parallel_worker
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