------------[ cut here ]------------ WARNING: CPU: 3 PID: 9603 at mm/page_counter.c:57 page_counter_cancel mm/page_counter.c:57 [inline] WARNING: CPU: 3 PID: 9603 at mm/page_counter.c:57 page_counter_cancel+0x56/0x70 mm/page_counter.c:50 Modules linked in: CPU: 3 PID: 9603 Comm: syz-executor.2 Not tainted 5.11.0-rc1-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 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 2d 85 b8 ff 48 85 db 78 09 5b 5d 41 5c e9 2f 7d b8 ff e8 2a 7d b8 ff <0f> 0b 5b 5d 41 5c e9 1f 7d b8 ff 0f 1f 44 00 00 66 2e 0f 1f 84 00 RSP: 0018:ffffc90002b9f788 EFLAGS: 00010012 RAX: 000000000000458b RBX: ffffffffffffffb1 RCX: ffffc900ca906000 RDX: 0000000000040000 RSI: ffffffff81b9f766 RDI: 0000000000000003 RBP: ffff8880092ea120 R08: 0000000000000000 R09: ffff88804023417f R10: ffffffff81b9f753 R11: 0000000000000000 R12: 000000000000010f R13: 0000000000000200 R14: ffff8880092ea000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff88802cd00000(0063) knlGS:00000000f553cb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000020008000 CR3: 0000000073dfe000 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_uncharge include/net/sock.h:1537 [inline] dfrag_uncharge net/mptcp/protocol.c:978 [inline] dfrag_clear+0x45e/0x540 net/mptcp/protocol.c:987 __mptcp_clean_una+0x146/0xc60 net/mptcp/protocol.c:1011 mptcp_release_cb+0x2d4/0x330 net/mptcp/protocol.c:2939 release_sock+0xb4/0x1b0 net/core/sock.c:3072 sk_stream_wait_memory+0x608/0xed0 net/core/stream.c:145 mptcp_sendmsg+0xd87/0x27b0 net/mptcp/protocol.c:1682 inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:672 __sys_sendto+0x21c/0x320 net/socket.c:1975 __do_sys_sendto net/socket.c:1987 [inline] __se_sys_sendto net/socket.c:1983 [inline] __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:1983 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f63549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f553c0bc EFLAGS: 00000296 ORIG_RAX: 0000000000000171 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000100 RDX: 00000000ffffffe7 RSI: 000000000000c000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000