page_counter underflow: -4294962247 nr_pages=4294967295 WARNING: CPU: 1 PID: 3692 at mm/page_counter.c:56 page_counter_cancel+0xcf/0xe0 mm/page_counter.c:56 Modules linked in: CPU: 1 PID: 3692 Comm: kworker/1:7 Not tainted 5.16.0-rc5-next-20211216-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events mptcp_worker RIP: 0010:page_counter_cancel+0xcf/0xe0 mm/page_counter.c:56 Code: c7 04 24 00 00 00 00 45 31 f6 eb 97 e8 ba 77 af ff 4c 89 ea 48 89 ee 48 c7 c7 60 fe b8 89 c6 05 5f b3 b5 0b 01 e8 a6 85 48 07 <0f> 0b eb a8 4c 89 e7 e8 d5 85 fa ff eb c7 0f 1f 00 41 56 41 55 49 RSP: 0018:ffffc90002bbf918 EFLAGS: 00010082 RAX: 0000000000000000 RBX: ffff8880314e8120 RCX: 0000000000000000 RDX: ffff88801be9ba80 RSI: ffffffff815f4748 RDI: fffff52000577f15 RBP: ffffffff000013b9 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815ee4ae R11: 0000000000000000 R12: ffff8880314e8120 R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5e98e0f718 CR3: 000000002a7f4000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000009800 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: page_counter_uncharge+0x2e/0x60 mm/page_counter.c:159 drain_stock+0xc1/0x170 mm/memcontrol.c:2172 refill_stock+0x131/0x1b0 mm/memcontrol.c:2224 __sk_mem_reduce_allocated+0x24d/0x550 net/core/sock.c:2951 __mptcp_rmem_reclaim net/mptcp/protocol.c:169 [inline] __mptcp_mem_reclaim_partial+0x124/0x410 net/mptcp/protocol.c:978 mptcp_mem_reclaim_partial net/mptcp/protocol.c:985 [inline] mptcp_alloc_tx_skb net/mptcp/protocol.c:1215 [inline] mptcp_sendmsg_frag+0x1ada/0x2410 net/mptcp/protocol.c:1282 __mptcp_push_pending+0x232/0x7a0 net/mptcp/protocol.c:1548 mptcp_release_cb+0xfe/0x200 net/mptcp/protocol.c:3013 release_sock+0xb4/0x1b0 net/core/sock.c:3312 mptcp_worker+0x51e/0xc20 net/mptcp/protocol.c:2479 process_one_work+0x9ac/0x1680 kernel/workqueue.c:2307 worker_thread+0x652/0x11c0 kernel/workqueue.c:2454 kthread+0x405/0x4f0 kernel/kthread.c:345 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295