==================================================================
BUG: KASAN: stack-out-of-bounds in __debug_check_no_obj_freed lib/debugobjects.c:775 [inline]
BUG: KASAN: stack-out-of-bounds in debug_check_no_obj_freed+0x467/0x595 lib/debugobjects.c:815
Read of size 8 at addr ffff8801b8785a80 by task syz-executor6/12768

CPU: 0 PID: 12768 Comm: syz-executor6 Not tainted 4.18.0-rc3+ #58
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
PANIC: double fault, error_code: 0x0
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
CPU: 1 PID: 12680 Comm: syz-executor6 Not tainted 4.18.0-rc3+ #58
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
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
 __debug_check_no_obj_freed lib/debugobjects.c:775 [inline]
 debug_check_no_obj_freed+0x467/0x595 lib/debugobjects.c:815
Code: 41 
57 41 
89 cf 
41 56 
41 55 
49 89 
 free_pages_prepare mm/page_alloc.c:1027 [inline]
 free_pcp_prepare mm/page_alloc.c:1041 [inline]
 free_unref_page_prepare mm/page_alloc.c:2732 [inline]
 free_unref_page_list+0x3c1/0x1200 mm/page_alloc.c:2801
fd 41 
54 
45 89 
cc 53 
65 4c 
8b 34 
25 40 
ee 01 
00 48 
 release_pages+0x7cf/0x14e0 mm/swap.c:792
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:ffff8801b2fffdc0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 1ffff10036600034 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620
RBP: ffff8801b3000148 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8801b9897be0 R11: ffff88019f3fe93b R12: 0000000000000000
R13: ffffffff88f92620 R14: ffff88019f3fe1c0 R15: 0000000000000002
FS:  0000000001011940(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8801b2fffdb8 CR3: 00000001d6a4d000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 __pagevec_release+0x88/0x130 mm/swap.c:812
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pagevec_release include/linux/pagevec.h:86 [inline]
 truncate_inode_pages_range+0xdf8/0x25c0 mm/truncate.c:372