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WARNING: CPU: 1 PID: 179 at include/linux/sched/mm.h:323 alloc_page_buffers+0x363/0x500 fs/buffer.c:887
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 179 Comm: kworker/u4:3 Not tainted 5.6.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: loop0 loop_workfn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x128/0x182 lib/dump_stack.c:118
 panic+0x22a/0x4e3 kernel/panic.c:221
 __warn.cold.10+0x25/0x26 kernel/panic.c:582
 report_bug+0x1ad/0x270 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x123/0x210 arch/x86/kernel/traps.c:267
 do_invalid_op+0x31/0x40 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:memalloc_use_memcg include/linux/sched/mm.h:323 [inline]
RIP: 0010:alloc_page_buffers+0x363/0x500 fs/buffer.c:866
Code: e4 07 00 74 2c 4c 89 55 d0 e8 69 0b a6 ff 48 c7 c6 9e dc b0 81 48 c7 c7 80 56 ba 88 e8 c6 86 9f ff 4c 8b 55 d0 e9 f9 fe ff ff <0f> 0b e9 06 fd ff ff e8 21 62 a5 ff 4c 8b 55 d0 84 c0 75 c7 48 c7
RSP: 0018:ffffc900016e7378 EFLAGS: 00010286
RAX: dffffc0000000000 RBX: 0000000000001000 RCX: 1ffff110152fd51e
RDX: 1ffff110152fd674 RSI: ffffffff88ba5680 RDI: ffff8880a97eb3a0
RBP: ffffc900016e73b8 R08: fffffbfff1334569 R09: fffffbfff1334569
R10: fffffbfff1334568 R11: ffffffff899a2b47 R12: 0000000000408c40
R13: ffffea0002387a80 R14: ffff8880a97ea000 R15: ffffc900016e7898
 create_empty_buffers+0x28/0x630 fs/buffer.c:1595
 create_page_buffers+0x1ee/0x2d0 fs/buffer.c:1712
 __block_write_full_page+0xbf/0xcd0 fs/buffer.c:1758
 __writepage+0x54/0xd0 mm/page-writeback.c:2303
 write_cache_pages+0x596/0xdc0 mm/page-writeback.c:2238
 generic_writepages+0xca/0x130 mm/page-writeback.c:2329
 ? 0xffffffff81000000
 do_writepages+0xca/0x240 mm/page-writeback.c:2344
 __filemap_fdatawrite_range+0x250/0x310 mm/filemap.c:421
 filemap_write_and_wait_range+0xaa/0x140 mm/filemap.c:654
 generic_file_read_iter+0xaeb/0x15a0 mm/filemap.c:2272
 call_read_iter include/linux/fs.h:1895 [inline]
 lo_rw_aio+0xa84/0xfe0 drivers/block/loop.c:572
 do_req_filebacked drivers/block/loop.c:620 [inline]
 loop_handle_cmd drivers/block/loop.c:2060 [inline]
 loop_process_work+0xe69/0x2590 drivers/block/loop.c:2096
 process_one_work+0x903/0x15c0 kernel/workqueue.c:2264
 worker_thread+0x82/0xb50 kernel/workqueue.c:2410
 kthread+0x31d/0x3e0 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..