R13: 00007ffef1c8f1ef R14: 00007fb6bf091300 R15: 0000000000022000 ------------[ cut here ]------------ page_counter underflow: -4294966217 nr_pages=4294967295 WARNING: CPU: 0 PID: 16623 at mm/page_counter.c:56 page_counter_cancel+0xcf/0xe0 mm/page_counter.c:56 Modules linked in: CPU: 0 PID: 16623 Comm: syz-executor.0 Not tainted 5.16.0-rc4-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 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 2a 1f b5 ff 4c 89 ea 48 89 ee 48 c7 c7 40 9f b8 89 c6 05 8e ac ba 0b 01 e8 b6 c5 3e 07 <0f> 0b eb a8 4c 89 e7 e8 25 5a fb ff eb c7 0f 1f 00 41 56 41 55 49 RSP: 0018:ffffc90002fbf5b0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff888042734120 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815e5238 RDI: fffff520005f7ea8 RBP: ffffffff00000437 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff815defde R11: 0000000000000000 R12: ffff888042734120 R13: 00000000ffffffff R14: 0000000000000000 R15: 0000000000000001 FS: 00007fb6bf091700(0000) GS:ffff88802ca00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6357f6a020 CR3: 000000006c5d9000 CR4: 0000000000150ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: page_counter_uncharge+0x2e/0x60 mm/page_counter.c:160 drain_stock+0xc1/0x180 mm/memcontrol.c:2219 refill_stock+0x139/0x2f0 mm/memcontrol.c:2271 __sk_mem_reduce_allocated+0x24d/0x550 net/core/sock.c:2945 __mptcp_rmem_reclaim net/mptcp/protocol.c:167 [inline] __mptcp_mem_reclaim_partial+0x124/0x410 net/mptcp/protocol.c:975 mptcp_mem_reclaim_partial net/mptcp/protocol.c:982 [inline] mptcp_alloc_tx_skb net/mptcp/protocol.c:1212 [inline] mptcp_sendmsg_frag+0x18c6/0x2190 net/mptcp/protocol.c:1279 __mptcp_push_pending+0x232/0x720 net/mptcp/protocol.c:1545 mptcp_sendmsg+0xe8b/0x1220 net/mptcp/protocol.c:1748 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:644 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x331/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmmsg+0x195/0x470 net/socket.c:2549 __do_sys_sendmmsg net/socket.c:2578 [inline] __se_sys_sendmmsg net/socket.c:2575 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2575 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fb6c011bae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb6bf091188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fb6c022ef60 RCX: 00007fb6c011bae9 RDX: 0000000000000002 RSI: 0000000020006100 RDI: 0000000000000003 RBP: 00007fb6bf0911d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffef1c8f1ef R14: 00007fb6bf091300 R15: 0000000000022000