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BUG: KASAN: stack-out-of-bounds in __rb_insert lib/rbtree.c:133 [inline]
BUG: KASAN: stack-out-of-bounds in rb_insert_color+0xb08/0x1480 lib/rbtree.c:452
kasan: CONFIG_KASAN_INLINE enabled
Read of size 8 at addr ffff88019d07f718 by task syz-executor1/4486
kasan: GPF could be caused by NULL-ptr deref or user memory access

CPU: 0 PID: 4486 Comm: syz-executor1 Not tainted 4.18.0-rc3+ #53
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
general protection fault: 0000 [#1] SMP KASAN
Call Trace:
CPU: 1 PID: 8762 Comm: syz-executor5 Not tainted 4.18.0-rc3+ #53
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__rb_insert lib/rbtree.c:131 [inline]
RIP: 0010:rb_insert_color+0x189/0x1480 lib/rbtree.c:452
Code: 
09 
00 
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
00 
4d 
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
8b 65 
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
00 
 __rb_insert lib/rbtree.c:133 [inline]
 rb_insert_color+0xb08/0x1480 lib/rbtree.c:452
41 
f6 
c4 
01 
0f 
85 
01 
02 
00 
00 
48 
ba 
00 
00 
00 
00 
00 
fc 
ff 
df 
49 
 timerqueue_add+0x173/0x2b0 lib/timerqueue.c:58
8d 
 enqueue_hrtimer+0x18e/0x540 kernel/time/hrtimer.c:960
4c 
24 
08 
4d 
89 
e0 
 __hrtimer_start_range_ns kernel/time/hrtimer.c:1089 [inline]
 hrtimer_start_range_ns+0x616/0xd20 kernel/time/hrtimer.c:1115
48 
89 
c8 
48 
c1 
e8 
 hrtimer_start_expires include/linux/hrtimer.h:412 [inline]
 do_nanosleep+0x1b0/0x750 kernel/time/hrtimer.c:1686
03 
<80> 
3c 
10 
00 
0f 85 
e5 
08 
00 
 hrtimer_nanosleep+0x2d4/0x620 kernel/time/hrtimer.c:1743
00 
49 
8b 
 __do_sys_nanosleep kernel/time/hrtimer.c:1777 [inline]
 __se_sys_nanosleep kernel/time/hrtimer.c:1764 [inline]
 __x64_sys_nanosleep+0x1e7/0x280 kernel/time/hrtimer.c:1764
44 
24 
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
08 
4c 
39 
e8 
0f 
84 
27 
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
02 
RIP: 0033:0x4811c0
Code: 
RSP: 0018:ffff8801daf07618 EFLAGS: 00010002
05 
48 
RAX: 0000000000000001 RBX: 1ffff1003b5e0ec9 RCX: 0000000000000008
3d 
RDX: dffffc0000000000 RSI: ffff8801daf25d40 RDI: ffff8801daf26560
01 f0 
RBP: ffff8801daf07a10 R08: 0000000000000000 R09: fffffbfff156f0e9
ff 
R10: fffffbfff156f0e9 R11: ffffffff8ab7874b R12: 0000000000000000
ff 
R13: ffff8801cf3ac040 R14: ffff8801daf079e8 R15: ffff8801daf26560
FS:  0000000001f95940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
0f 
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
83 
CR2: 00007f97aafeadb8 CR3: 00000001b1119000 CR4: 00000000001406e0
0d 
DR0: 0000000020000080 DR1: 0000000020000000 DR2: 0000000000000000
03 
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
f9 
Call Trace:
ff 
 <IRQ>
c3 
66 
2e 
0f 
1f 
84 
00 
00 
00 
00 
00 
66 
90 
83 
3d 
91 
52 
5c 
00 
00 
75 
 timerqueue_add+0x173/0x2b0 lib/timerqueue.c:58
14 
 enqueue_hrtimer+0x18e/0x540 kernel/time/hrtimer.c:960
b8 
23 
00 
00 
 __run_hrtimer kernel/time/hrtimer.c:1413 [inline]
 __hrtimer_run_queues+0xc07/0x10c0 kernel/time/hrtimer.c:1460
00 
0f 
05 
<48> 
3d 
01 
f0 
ff 
ff 
0f 
83 
 hrtimer_interrupt+0x2f3/0x750 kernel/time/hrtimer.c:1518
e4 
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x165/0x730 arch/x86/kernel/apic/apic.c:1050
02 
f9 
ff 
c3 
48 
83 
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
ec 
 </IRQ>
08 
Modules linked in:
e8 
6a 
Dumping ftrace buffer:
74 
   (ftrace buffer empty)
fd 
---[ end trace a8b368c3d3ff6f95 ]---
ff 
RIP: 0010:__rb_insert lib/rbtree.c:131 [inline]
RIP: 0010:rb_insert_color+0x189/0x1480 lib/rbtree.c:452
Code: 
RSP: 002b:00007ffec07f11e8 EFLAGS: 00000246
09 
 ORIG_RAX: 0000000000000023
00 
RAX: ffffffffffffffda RBX: 0000000000010f88 RCX: 00000000004811c0
00 
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffec07f11f0
4d 
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000e0f940
8b 65 
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000b
00 
R13: 00000000000001c4 R14: 00007ffec07f18b0 R15: 0000000000010c3b
41 

f6 
The buggy address belongs to the page:
c4 
page:ffffea0006741fc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
01 
0f 
flags: 0x2fffc0000000000()
85 
raw: 02fffc0000000000 0000000000000000 ffffffff06740101 0000000000000000
01 
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
02 
page dumped because: kasan: bad access detected
00 

00 
Memory state around the buggy address:
48 
 ffff88019d07f600: f2 f2 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00 00
ba 
 ffff88019d07f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
00 
>ffff88019d07f700: f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2
00 
                            ^
00 
 ffff88019d07f780: f2 f2 00 f2 f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 f2
00 00 
 ffff88019d07f800: f2 f2 00 f2 f2 f2 00 00 00 00 00 00 00 00 00 00
fc 
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ff