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BUG: KASAN: vmalloc-out-of-bounds in __read_once_size include/linux/compiler.h:199 [inline]
BUG: KASAN: vmalloc-out-of-bounds in rcu_seq_current kernel/rcu/rcu.h:99 [inline]
BUG: KASAN: vmalloc-out-of-bounds in srcu_invoke_callbacks+0x2fb/0x320 kernel/rcu/srcutree.c:1170
Read of size 8 at addr ffffc9000276ec80 by task kworker/1:6/4061

CPU: 1 PID: 4061 Comm: kworker/1:6 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: rcu_gp srcu_invoke_callbacks
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x128/0x182 lib/dump_stack.c:118
 print_address_description.constprop.8.cold.10+0x56/0x317 mm/kasan/report.c:374
 __kasan_report.cold.11+0x1c/0x34 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:641
 __read_once_size include/linux/compiler.h:199 [inline]
 rcu_seq_current kernel/rcu/rcu.h:99 [inline]
 srcu_invoke_callbacks+0x2fb/0x320 kernel/rcu/srcutree.c:1170
 process_one_work+0x903/0x15c0 kernel/workqueue.c:2264
 worker_thread+0x82/0xb50 kernel/workqueue.c:2410
 kthread+0x31d/0x3e0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352


Memory state around the buggy address:
 ffffc9000276eb80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffffc9000276ec00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
>ffffc9000276ec80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
                   ^
 ffffc9000276ed00: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
 ffffc9000276ed80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
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