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BUG: KASAN: stack-out-of-bounds in __d_lookup+0x8bb/0x9e0 fs/dcache.c:2269
Read of size 4 at addr ffff8881dab47368 by task syz-executor5/27416

CPU: 1 PID: 27416 Comm: syz-executor5 Not tainted 4.20.0-rc3+ #316
PANIC: double fault, error_code: 0x0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
CPU: 0 PID: 27423 Comm: syz-executor3 Not tainted 4.20.0-rc3+ #316
Call Trace:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:match_held_lock+0x34/0x8d0 kernel/locking/lockdep.c:3401
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
Code: 55 48 89 e5 41 57 41 56 4c 8d 75 d8 41 55 49 89 fd 48 83 c7 10 41 54 53 48 8d 9d 38 ff ff ff 48 c1 eb 03 48 81 ec c8 00 00 00 <48> c7 85 38 ff ff ff b3 8a b5 41 48 c7 85 40 ff ff ff bf b2 11 89
RSP: 0018:ffff8881d9bfdfd0 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 1ffff1103b37fbff RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8959b940 RDI: ffff888164c18b10
RBP: ffff8881d9bfe0c0 R08: ffff888164c18280 R09: ffffed103b5c5b67
R10: ffffed103b5c5b67 R11: ffff8881dae2db3b R12: ffff888164c18280
 print_address_description.cold.7+0x9/0x1ff mm/kasan/report.c:256
R13: ffff888164c18b00 R14: ffff8881d9bfe098 R15: 0000000000000000
FS:  00007f2e8e52d700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8881d9bfdfc8 CR3: 00000001af3d7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report.c:432
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __d_lookup+0x8bb/0x9e0 fs/dcache.c:2269