==================================================================
PANIC: double fault, error_code: 0x0
BUG: KASAN: stack-out-of-bounds in __read_once_size include/linux/compiler.h:188 [inline]
BUG: KASAN: stack-out-of-bounds in calc_group_shares kernel/sched/fair.c:2931 [inline]
BUG: KASAN: stack-out-of-bounds in update_cfs_group+0x4b1/0x590 kernel/sched/fair.c:3028
CPU: 1 PID: 15263 Comm: syz-executor7 Not tainted 4.18.0-rc3+ #45
Read of size 8 at addr ffff8801aca4b500 by task syz-executor5/15250
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x2e/0x5020 kernel/locking/lockdep.c:3294

Code: 41 
CPU: 0 PID: 15250 Comm: syz-executor5 Not tainted 4.18.0-rc3+ #45
57 41 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
89 cf 
Call Trace:
41 56 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
41 55 
49 89 
fd 41 
54 45 
89 
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
cc 53 
65 4c 
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
8b 34 
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
25 40 
 __read_once_size include/linux/compiler.h:188 [inline]
 calc_group_shares kernel/sched/fair.c:2931 [inline]
 update_cfs_group+0x4b1/0x590 kernel/sched/fair.c:3028
ee 01 
00 48 
83 e4 
f0 48 
 dequeue_entity+0x400/0x15e0 kernel/sched/fair.c:4322
81 
ec 60 
03 00 
00 48 
8b 45 
10 <89> 
94 24 
80 
 dequeue_task_fair+0xf2/0x9e0 kernel/sched/fair.c:5455
00 00 
00 48 
ba 00 
00 00 
00 00 
fc ff 
df 48 
 dequeue_task kernel/sched/core.c:762 [inline]
 deactivate_task+0xf3/0x330 kernel/sched/core.c:778
89 
 __schedule+0x9c9/0x1ed0 kernel/sched/core.c:3454
84 24 
98 
RSP: 0018:ffff8801ac5ffe80 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 1ffff100358c004c RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620
RBP: ffff8801ac600208 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8801acc771b8 R11: ffff8801daf236b3 R12: 0000000000000000
R13: ffffffff88f92620 R14: ffff8801aee52140 R15: 0000000000000002
FS:  00007fe265cc0700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801ac5ffe78 CR3: 00000001aaa5e000 CR4: 00000000001406e0
DR0: 00000000200001c0 DR1: 0000000020000000 DR2: 0000000000000000
 schedule+0xfb/0x450 kernel/sched/core.c:3548
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace: