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BUG: KASAN: out-of-bounds in csd_lock_record+0xd2/0xe0 kernel/smp.c:119
Read of size 8 at addr ffffc90001827578 by task syz-executor.2/7011

CPU: 1 PID: 7011 Comm: syz-executor.2 Not tainted 5.8.0-rc3-next-20200703-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x436 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 csd_lock_record+0xd2/0xe0 kernel/smp.c:119
 flush_smp_call_function_queue+0x285/0x730 kernel/smp.c:391
 __sysvec_call_function_single+0x98/0x490 arch/x86/kernel/smp.c:248
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_call_function_single+0xe0/0x120 arch/x86/kernel/smp.c:243
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:604
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:760 [inline]
RIP: 0010:___might_sleep+0x183/0x2f0 kernel/sched/core.c:6913
Code: fe b4 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 5f 01 00 00 48 83 3d fc 0d 65 08 00 0f 84 12 01 00 00 9c <58> 0f 1f 44 00 00 f6 c4 02 0f 84 fa fe ff ff 65 4c 8b 2c 25 c0 fe
RSP: 0018:ffffc90002627d98 EFLAGS: 00000282
RAX: 1ffffffff1369fdf RBX: 0000000000000000 RCX: ffffffff81a303cb
RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: ffff88805b244638
RBP: ffffffff88938520 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000001b
R13: 0000000000000000 R14: ffff88805b2442c0 R15: 0000000000000000


Memory state around the buggy address:
 ffffc90001827480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90001827500: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 f3 f3 f3 f3
>ffffc90001827580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffffc90001827600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90001827680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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