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BUG: KASAN: out-of-bounds in csd_lock_record+0xcb/0xe0 kernel/smp.c:118
Read of size 8 at addr ffffc900018e77b0 by task syz-executor.0/21435

CPU: 1 PID: 21435 Comm: syz-executor.0 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+0xcb/0xe0 kernel/smp.c:118
 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:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x19/0x60 kernel/kcov.c:197
Code: 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 48 8b 14 25 c0 fe 01 00 65 8b 05 70 f7 8d 7e a9 00 01 ff 00 48 8b 34 24 <74> 0f f6 c4 01 74 35 8b 82 0c 14 00 00 85 c0 74 2b 8b 82 e8 13 00
RSP: 0018:ffffc9000736fba8 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffffffff83633cba
RDX: ffff888091360000 RSI: ffffffff83633cd7 RDI: 0000000000000005
RBP: ffff88809fa01400 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000736fc98
R13: ffffc9000736fc98 R14: 0000000000000002 R15: 0000000000000002
 tomoyo_check_path_number_acl+0x97/0x300 security/tomoyo/file.c:282
 tomoyo_check_acl+0x138/0x410 security/tomoyo/domain.c:175
 tomoyo_path_number_perm+0x31d/0x4d0 security/tomoyo/file.c:733
 security_file_ioctl+0x50/0xb0 security/security.c:1480
 ksys_ioctl+0x50/0x180 fs/ioctl.c:747
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c9f7
Code: Bad RIP value.
RSP: 002b:00007f44b2c8a068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f44b2c8a830 RCX: 000000000045c9f7
RDX: 00007f44b2c8a830 RSI: 000000004008ae90 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000090 R09: 00000000000000a8
R10: 00000000000000b3 R11: 0000000000000246 R12: 0000000000000007
R13: 0000000020000000 R14: 00000000004ce6e8 R15: 00007f44b2c8c6d4


Memory state around the buggy address:
 ffffc900018e7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900018e7700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900018e7780: f1 f1 f1 f1 00 00 00 00 f3 f3 f3 f3 00 00 00 00
                                        ^
 ffffc900018e7800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900018e7880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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