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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 ffffc900015d7970 by task syz-executor.1/6846

CPU: 1 PID: 6846 Comm: syz-executor.1 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:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:196
Code: 48 89 ef 5d e9 91 19 3f 00 5d be 03 00 00 00 e9 a6 66 25 02 66 0f 1f 44 00 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
RSP: 0018:ffffc900018878d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000008 RCX: ffffffff83646097
RDX: 0000000000000000 RSI: ffff888094ca0240 RDI: 0000000000000005
RBP: ffff8880a6819700 R08: 0000000000000001 R09: ffffffff8cad1e87
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000030
R13: 00000000000001a7 R14: dffffc0000000000 R15: 0000000000000000
 tomoyo_domain_quota_is_ok+0x31a/0x550 security/tomoyo/util.c:1070
 tomoyo_supervisor+0x2d4/0xeb0 security/tomoyo/common.c:2089
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x25c/0x360 security/tomoyo/file.c:573
 tomoyo_path_perm+0x2e7/0x3f0 security/tomoyo/file.c:838
 tomoyo_path_unlink+0x8e/0xd0 security/tomoyo/tomoyo.c:150
 security_path_unlink+0xd7/0x150 security/security.c:1100
 do_unlinkat+0x375/0x660 fs/namei.c:3892
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c8d7
Code: Bad RIP value.
RSP: 002b:00007ffe9206e638 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045c8d7
RDX: 00007ffe9206e650 RSI: 00007ffe9206e650 RDI: 00007ffe9206e6e0
RBP: 0000000000000a44 R08: 0000000000000000 R09: 000000000000000d
R10: 0000000000000006 R11: 0000000000000246 R12: 00007ffe9206f770
R13: 0000000001174940 R14: 0000000000000000 R15: 00007ffe9206f770


Memory state around the buggy address:
 ffffc900015d7800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900015d7880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900015d7900: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
                                                             ^
 ffffc900015d7980: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900015d7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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