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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 ffffc90017ea7130 by task syz-executor.3/27927

CPU: 0 PID: 27927 Comm: syz-executor.3 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:tomoyo_check_acl+0xad/0x410 security/tomoyo/domain.c:173
Code: 03 00 00 49 8b 1c 24 49 39 dc 0f 84 f5 01 00 00 e8 28 25 11 fe 48 8d 7b 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 <38> d0 7f 08 84 c0 0f 85 d7 02 00 00 44 0f b6 73 18 31 ff 44 89 f6
RSP: 0018:ffffc90017e97760 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880a7ef0c00 RCX: ffffc9000fbf4000
RDX: 0000000000000000 RSI: ffffffff8362e1d8 RDI: ffff8880a7ef0c18
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8cad1e87
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809e2e9990
R13: ffffc90017e97850 R14: 0000000000000000 R15: 0000000000000000
 tomoyo_path_permission security/tomoyo/file.c:586 [inline]
 tomoyo_path_permission+0x1f5/0x360 security/tomoyo/file.c:573
 tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
 tomoyo_file_open security/tomoyo/tomoyo.c:313 [inline]
 tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:308
 security_file_open+0x52/0x3f0 security/security.c:1574
 do_dentry_open+0x358/0x11b0 fs/open.c:809
 do_open fs/namei.c:3249 [inline]
 path_openat+0x1bb9/0x2750 fs/namei.c:3366
 do_filp_open+0x17e/0x3c0 fs/namei.c:3393
 do_sys_openat2+0x16f/0x3b0 fs/open.c:1173
 do_sys_open fs/open.c:1189 [inline]
 ksys_open include/linux/syscalls.h:1398 [inline]
 __do_sys_open fs/open.c:1195 [inline]
 __se_sys_open fs/open.c:1193 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1193
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x416921
Code: Bad RIP value.
RSP: 002b:00007f830261abb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000050b0e0 RCX: 0000000000416921
RDX: 00007f830261abe7 RSI: 0000000000000002 RDI: 00007f830261abd0
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000017
R10: 000000000000000c R11: 0000000000000293 R12: 00000000ffffffff
R13: 0000000000000c69 R14: 00000000004cec55 R15: 00007f830261b6d4


Memory state around the buggy address:
 ffffc90017ea7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90017ea7080: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
>ffffc90017ea7100: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
                                     ^
 ffffc90017ea7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90017ea7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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