WARNING: CPU: 0 PID: 2315 at mm/filemap.c:250 unaccount_page_cache_page+0x752/0xb80 mm/filemap.c:250
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2315 Comm: syz-executor.3 Not tainted 4.19.154-syzkaller #0
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+0x1fc/0x2fe lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x61 kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:unaccount_page_cache_page+0x752/0xb80 mm/filemap.c:250
Code: c6 60 09 71 88 48 89 ef e8 ab 55 0e 00 0f 0b e8 64 83 e6 ff 48 c7 c6 e0 09 71 88 48 89 ef e8 95 55 0e 00 0f 0b e8 4e 83 e6 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02
RSP: 0018:ffff88805829fa38 EFLAGS: 00010016
RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc9000c650000
RDX: 000000000000bd45 RSI: ffffffff817e4bb2 RDI: 0000000000000007
RBP: ffffea0001388bc0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88808ff6a620 R14: ffffea000228e648 R15: 0000000000000000
 delete_from_page_cache_batch+0x191/0xcc0 mm/filemap.c:382
 truncate_inode_pages_range+0x55c/0x1b10 mm/truncate.c:368
 blkdev_fallocate+0x22d/0x3f0 fs/block_dev.c:2032
 vfs_fallocate+0x487/0x9a0 fs/open.c:308
 ksys_fallocate fs/open.c:331 [inline]
 __do_sys_fallocate fs/open.c:339 [inline]
 __se_sys_fallocate fs/open.c:337 [inline]
 __x64_sys_fallocate+0xcf/0x140 fs/open.c:337
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45deb9
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f9bbd2b8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000002f40 RCX: 000000000045deb9
RDX: 0000000000000000 RSI: 0000000100000001 RDI: 0000000000000007
RBP: 000000000118c0b8 R08: 0000000000000000 R09: 0000000000000000
R10: 000000002811fdff R11: 0000000000000246 R12: 000000000118c07c
R13: 00007ffdc981aeff R14: 00007f9bbd2b99c0 R15: 000000000118c07c
Kernel Offset: disabled
Rebooting in 86400 seconds..