------------[ cut here ]------------
WARNING: CPU: 2 PID: 5056 at mm/page_counter.c:57 page_counter_cancel mm/page_counter.c:57 [inline]
WARNING: CPU: 2 PID: 5056 at mm/page_counter.c:57 page_counter_cancel+0x56/0x70 mm/page_counter.c:50
Modules linked in:
CPU: 2 PID: 5056 Comm: kworker/2:2 Not tainted 5.10.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: events mptcp_worker
RIP: 0010:page_counter_cancel mm/page_counter.c:57 [inline]
RIP: 0010:page_counter_cancel+0x56/0x70 mm/page_counter.c:50
Code: 89 ef 48 89 c3 48 89 c6 e8 37 fd ff ff 31 ff 48 89 de e8 dd 8d b8 ff 48 85 db 78 09 5b 5d 41 5c e9 df 85 b8 ff e8 da 85 b8 ff <0f> 0b 5b 5d 41 5c e9 cf 85 b8 ff 0f 1f 44 00 00 66 2e 0f 1f 84 00
RSP: 0018:ffffc9002a7bfa30 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffffffffff15ad RCX: 0000000000000000
RDX: ffff88801387c600 RSI: ffffffff81b9f666 RDI: 0000000000000003
RBP: ffff88802bab6120 R08: 0000000000000000 R09: ffff88804023417f
R10: ffffffff81b9f653 R11: 0000000000000000 R12: 000000000000ec20
R13: 0000000000000200 R14: ffff88802bab6000 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000031120000 CR3: 000000005a22b000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 page_counter_uncharge+0x2e/0x60 mm/page_counter.c:156
 drain_stock+0xc9/0x2c0 mm/memcontrol.c:2314
 refill_stock+0x132/0x270 mm/memcontrol.c:2363
 __sk_mem_reduce_allocated+0x24d/0x550 net/core/sock.c:2711
 sk_mem_reclaim include/net/sock.h:1505 [inline]
 sk_stream_kill_queues+0x392/0x530 net/core/stream.c:205
 __mptcp_destroy_sock+0x44a/0x790 net/mptcp/protocol.c:2557
 mptcp_worker+0x867/0x1a30 net/mptcp/protocol.c:2292
 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296