==================================================================
BUG: KASAN: stack-out-of-bounds in rb_next+0x10f/0x140 lib/rbtree.c:553
Read of size 8 at addr ffff88019c3fe1e0 by task syz-executor3/4475
PANIC: double fault, error_code: 0x0

CPU: 0 PID: 32478 Comm: syz-executor3 Not tainted 4.18.0-rc3+ #48
CPU: 1 PID: 4475 Comm: syz-executor3 Not tainted 4.18.0-rc3+ #48
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
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Code: 41 
Call Trace:
57 41 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
89 cf 
41 56 
41 55 
49 
89 fd 
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
41 54 
45 89 
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
cc 53 
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
65 4c 
 rb_next+0x10f/0x140 lib/rbtree.c:553
8b 34 
 __rb_erase_augmented include/linux/rbtree_augmented.h:174 [inline]
 rb_erase_cached+0xc82/0x32c0 lib/rbtree.c:477
25 40 
ee 01 
00 48 
83 e4 
f0 
48 81 
ec 60 
03 00 
00 48 
8b 45 
10 <89> 
94 24 
80 00 
00 
00 48 
ba 00 
00 00 
00 00 
fc ff 
df 48 
89 84 
24 98 
RSP: 0018:ffff88019adffe40 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 1ffff100335c0045 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620
RBP: ffff88019ae001d0 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88019c5cf1b8 R11: ffff8801dae236b3 R12: 0000000000000000
R13: ffffffff88f92620 R14: ffff8801c6acc500 R15: 0000000000000002
FS:  00007fa9ed315700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88019adffe38 CR3: 00000001b56be000 CR4: 00000000001406f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000020000000
DR3: 00000000200001c0 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace: