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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 ffffc90004917970 by task systemd-udevd/8228

CPU: 0 PID: 8228 Comm: systemd-udevd 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:write_comp_data+0xa/0x80 kernel/kcov.c:217
Code: 65 48 8b 04 25 c0 fe 01 00 48 8b 80 00 14 00 00 c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 49 89 f2 65 8b 05 36 fc 8d 7e <65> 48 8b 34 25 c0 fe 01 00 a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b
RSP: 0018:ffffc90004d375a0 EFLAGS: 00000202
RAX: 0000000080000000 RBX: 0000000000000005 RCX: ffffffff83646097
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff88809e048f80 R08: 0000000000000001 R09: ffffffff8cad1e87
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000020
R13: 0000000000000182 R14: dffffc0000000000 R15: 0000000000000001
 tomoyo_domain_quota_is_ok+0x307/0x550 security/tomoyo/util.c:1071
 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_check_open_permission+0x33e/0x380 security/tomoyo/file.c:777
 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: 0033:0x7f510a0906f0
Code: Bad RIP value.
RSP: 002b:00007ffe59987878 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000563176492310 RCX: 00007f510a0906f0
RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffe59987a20
RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000080000 R11: 0000000000000246 R12: 000056317506068a
R13: 0000000000000001 R14: 00007ffe59987a20 R15: 00007ffe59987a80


Memory state around the buggy address:
 ffffc90004917800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004917880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90004917900: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
                                                                ^
 ffffc90004917980: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004917a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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