------------[ cut here ]------------ WARNING: CPU: 1 PID: 4441 at net/mptcp/protocol.c:718 __mptcp_move_skbs_from_subflow+0x1a9c/0x2494 Modules linked in: CPU: 1 PID: 4441 Comm: syz.4.26 Not tainted 6.1.113-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __mptcp_move_skbs_from_subflow+0x1a9c/0x2494 lr : __mptcp_move_skbs_from_subflow+0x1a9c/0x2494 sp : ffff800008016df0 x29: ffff800008016f80 x28: 00000000cd566c73 x27: ffff0000c426a0b8 x26: 0000000000020000 x25: 0000000000000004 x24: ffff0000c4269a10 x23: dfff800000000000 x22: ffff0000c33c85f8 x21: 0000000000000000 x20: 00000000000081e5 x19: 0000000000007d00 x18: ffff0000c426a060 x17: ffff80019e3f6000 x16: ffff8000084f87a8 x15: 0000000000000000 x14: 1ffff00002b3a0b0 x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff80001218ec40 x8 : ffff0000d7aa3780 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80001218e0a8 x2 : 0000000000000001 x1 : 00000000000081e5 x0 : 0000000000007d00 Call trace: __mptcp_move_skbs_from_subflow+0x1a9c/0x2494 move_skbs_to_msk net/mptcp/protocol.c:836 [inline] mptcp_data_ready+0x188/0x50c net/mptcp/protocol.c:879 subflow_data_ready+0x178/0x234 net/mptcp/subflow.c:1376 tcp_data_ready+0x22c/0x44c net/ipv4/tcp_input.c:5091 tcp_data_queue+0x1cc8/0x53e4 net/ipv4/tcp_input.c:5165 tcp_rcv_established+0xa84/0x1fe0 net/ipv4/tcp_input.c:6097 tcp_v4_do_rcv+0x390/0xb08 net/ipv4/tcp_ipv4.c:1683 tcp_v4_rcv+0x20e4/0x2818 net/ipv4/tcp_ipv4.c:2114 ip_protocol_deliver_rcu+0x340/0x764 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x258/0x49c net/ipv4/ip_input.c:233 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:302 ip_local_deliver+0x11c/0x190 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:454 [inline] ip_rcv_finish+0x224/0x250 net/ipv4/ip_input.c:449 NF_HOOK+0x328/0x3d4 include/linux/netfilter.h:302 ip_rcv+0x78/0x98 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core net/core/dev.c:5532 [inline] __netif_receive_skb+0x18c/0x400 net/core/dev.c:5646 process_backlog+0x410/0x784 net/core/dev.c:5974 __napi_poll+0xb4/0x3f0 net/core/dev.c:6541 napi_poll net/core/dev.c:6608 [inline] net_rx_action+0x5cc/0xd3c net/core/dev.c:6722 handle_softirqs+0x318/0xd58 kernel/softirq.c:571 __do_softirq+0x14/0x20 kernel/softirq.c:605 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:893 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 do_softirq+0xf8/0x1ac kernel/softirq.c:472 __local_bh_enable_ip+0x298/0x470 kernel/softirq.c:396 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33 rcu_read_unlock_bh include/linux/rcupdate.h:861 [inline] __dev_queue_xmit+0x17f4/0x34d0 net/core/dev.c:4324 dev_queue_xmit include/linux/netdevice.h:3021 [inline] neigh_hh_output include/net/neighbour.h:528 [inline] neigh_output include/net/neighbour.h:542 [inline] ip_finish_output2+0xc6c/0x11b8 net/ipv4/ip_output.c:228 __ip_finish_output+0x1b0/0x458 ip_finish_output+0x40/0x268 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:291 [inline] ip_output+0x330/0x49c net/ipv4/ip_output.c:430 dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0xd8c/0x1840 net/ipv4/ip_output.c:532 ip_queue_xmit+0x5c/0x78 net/ipv4/ip_output.c:546 __tcp_transmit_skb+0x1954/0x3258 net/ipv4/tcp_output.c:1403 tcp_transmit_skb net/ipv4/tcp_output.c:1421 [inline] tcp_mtu_probe net/ipv4/tcp_output.c:2457 [inline] tcp_write_xmit+0x47ac/0x4e2c net/ipv4/tcp_output.c:2633 __tcp_push_pending_frames+0x98/0x228 net/ipv4/tcp_output.c:2894 tcp_push+0x44c/0x68c net/ipv4/tcp.c:734 mptcp_push_release net/mptcp/protocol.c:1575 [inline] __mptcp_push_pending+0x658/0xb54 net/mptcp/protocol.c:1653 mptcp_sendmsg+0xc0c/0x13bc net/mptcp/protocol.c:1899 inet_sendmsg+0x15c/0x290 net/ipv4/af_inet.c:843 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:730 [inline] __sys_sendto+0x3b8/0x508 net/socket.c:2153 __do_sys_sendto net/socket.c:2165 [inline] __se_sys_sendto net/socket.c:2161 [inline] __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2161 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 7103 hardirqs last enabled at (7102): [<ffff80000897b73c>] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:242 hardirqs last disabled at (7103): [<ffff8000122939ac>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (7072): [<ffff800010573474>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (7073): [<ffff800008020174>] __do_softirq+0x14/0x20 kernel/softirq.c:605 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 21 at include/linux/backing-dev.h:246 inode_to_wb include/linux/backing-dev.h:243 [inline] WARNING: CPU: 1 PID: 21 at include/linux/backing-dev.h:246 __folio_end_writeback+0x7d8/0x9c8 mm/page-writeback.c:2951 Modules linked in: CPU: 1 PID: 21 Comm: ksoftirqd/1 Tainted: G W 6.1.113-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : inode_to_wb include/linux/backing-dev.h:243 [inline] pc : __folio_end_writeback+0x7d8/0x9c8 mm/page-writeback.c:2951 lr : inode_to_wb include/linux/backing-dev.h:243 [inline] lr : __folio_end_writeback+0x7d8/0x9c8 mm/page-writeback.c:2951 sp : ffff80001d1e7970 x29: ffff80001d1e7990 x28: dfff800000000000 x27: 1fffff80006a95f8 x26: 0000000000000000 x25: ffff0000c049e8e8 x24: 05ffd60000002052 x23: 0000000000000003 x22: ffff0000da3c02a0 x21: ffff0000da3c02a8 x20: 0000000000000001 x19: fffffc000354afc0 x18: 1fffe000367a3376 x17: ffff8000159cd000 x16: ffff8000083042fc x15: 0000000000000000 x14: 1ffff00002b3a0b0 x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff80000877bb6c x8 : ffff0000c0a51bc0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: inode_to_wb include/linux/backing-dev.h:243 [inline] __folio_end_writeback+0x7d8/0x9c8 mm/page-writeback.c:2951 folio_end_writeback+0x12c/0x420 mm/filemap.c:1641 end_page_writeback+0x58/0x74 mm/folio-compat.c:26 end_buffer_async_write+0x398/0x53c fs/buffer.c:375 end_bio_bh_io_sync+0xb0/0x1e0 fs/buffer.c:2655 bio_endio+0x7c8/0x80c block/bio.c:1554 req_bio_endio block/blk-mq.c:780 [inline] blk_update_request+0x4ac/0xdf0 block/blk-mq.c:925 blk_mq_end_request+0x54/0x88 block/blk-mq.c:1050 lo_complete_rq+0x140/0x258 drivers/block/loop.c:365 blk_complete_reqs block/blk-mq.c:1130 [inline] blk_done_softirq+0x11c/0x168 block/blk-mq.c:1135 handle_softirqs+0x318/0xd58 kernel/softirq.c:571 run_ksoftirqd+0x6c/0x29c kernel/softirq.c:938 smpboot_thread_fn+0x4b0/0x96c kernel/smpboot.c:164 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 irq event stamp: 332697 hardirqs last enabled at (332696): [<ffff8000089cec70>] folio_memcg_lock+0xf4/0x20c mm/memcontrol.c:2110 hardirqs last disabled at (332697): [<ffff800012379430>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (332697): [<ffff800012379430>] _raw_spin_lock_irqsave+0xa4/0xb4 kernel/locking/spinlock.c:162 softirqs last enabled at (332686): [<ffff8000081c7c58>] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (332686): [<ffff8000081c7c58>] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599 softirqs last disabled at (332691): [<ffff8000081ca74c>] run_ksoftirqd+0x6c/0x29c kernel/softirq.c:938 ---[ end trace 0000000000000000 ]---