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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 ffffc90001077978 by task syz-executor.3/3408

CPU: 1 PID: 3408 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+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: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:ffffc900062cfad8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888093fe8080 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8362e1d8 RDI: ffff888093fe8098
RBP: dffffc0000000000 R08: 0000000000000d40 R09: ffff88809f524cd0
R10: 0000000000000002 R11: 0000000000000000 R12: ffff888090c82f10
R13: ffffc900062cfc00 R14: 0000000000000002 R15: 0000000000000000
 tomoyo_path_permission security/tomoyo/file.c:586 [inline]
 tomoyo_path_permission+0x1f5/0x360 security/tomoyo/file.c:573
 tomoyo_path_perm+0x395/0x3f0 security/tomoyo/file.c:838
 tomoyo_path_symlink+0x94/0xe0 security/tomoyo/tomoyo.c:200
 security_path_symlink+0xdf/0x150 security/security.c:1109
 do_symlinkat+0x123/0x2c0 fs/namei.c:3984
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c8b7
Code: Bad RIP value.
RSP: 002b:00007ffe2794d648 EFLAGS: 00000206 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000045c8b7
RDX: 00007ffe2794d6e3 RSI: 00000000004c26a1 RDI: 00007ffe2794d6d0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
R10: 0000000000000075 R11: 0000000000000206 R12: 0000000000000001
R13: 00007ffe2794d680 R14: 0000000000000000 R15: 00007ffe2794d690


Memory state around the buggy address:
 ffffc90001077800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90001077880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90001077900: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
                                                                ^
 ffffc90001077980: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90001077a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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