===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.1.0-rc5-syzkaller-00326-g77c51ba552a1 #0 Not tainted ----------------------------------------------------- syz-executor.0/8449 [HC0[0]:SC0[4]:HE1:SE0] is trying to acquire: ffff888050c083b8 (k-clock-AF_INET){+++.}-{2:2}, at: sock_i_uid+0x1f/0xb0 net/core/sock.c:2542 and this task is already holding: ffffc90000d00848 (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffffc90000d00848 (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2}, at: inet_csk_find_open_port net/ipv4/inet_connection_sock.c:339 [inline] ffffc90000d00848 (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2}, at: inet_csk_get_port+0xd94/0x2640 net/ipv4/inet_connection_sock.c:484 which would create a new lock dependency: (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2} -> (k-clock-AF_INET){+++.}-{2:2} but this new dependency connects a SOFTIRQ-irq-safe lock: (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] __inet_inherit_port+0x29f/0x14e0 net/ipv4/inet_hashtables.c:230 tcp_v4_syn_recv_sock+0xb5b/0x14c0 net/ipv4/tcp_ipv4.c:1588 tcp_check_req+0x632/0x1aa0 net/ipv4/tcp_minisocks.c:786 tcp_v4_rcv+0x24b4/0x3980 net/ipv4/tcp_ipv4.c:2030 ip_protocol_deliver_rcu+0x9f/0x7c0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2ec/0x4c0 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:455 [inline] ip_sublist_rcv_finish+0x9a/0x2c0 net/ipv4/ip_input.c:575 ip_list_rcv_finish net/ipv4/ip_input.c:625 [inline] ip_sublist_rcv+0x533/0x980 net/ipv4/ip_input.c:633 ip_list_rcv+0x31e/0x470 net/ipv4/ip_input.c:668 __netif_receive_skb_list_ptype net/core/dev.c:5532 [inline] __netif_receive_skb_list_core+0x548/0x8f0 net/core/dev.c:5580 __netif_receive_skb_list net/core/dev.c:5632 [inline] netif_receive_skb_list_internal+0x75f/0xd90 net/core/dev.c:5723 gro_normal_list include/net/gro.h:433 [inline] gro_normal_list include/net/gro.h:429 [inline] napi_complete_done+0x1f5/0x890 net/core/dev.c:6064 e1000_clean+0x9b3/0x1c40 drivers/net/ethernet/intel/e1000/e1000_main.c:3811 __napi_poll+0xb8/0x770 net/core/dev.c:6498 napi_poll net/core/dev.c:6565 [inline] net_rx_action+0xa00/0xde0 net/core/dev.c:6676 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 common_interrupt+0xad/0xd0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640 writel arch/x86/include/asm/io.h:69 [inline] e1000_watchdog+0x791/0x1080 drivers/net/ethernet/intel/e1000/e1000_main.c:2543 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 to a SOFTIRQ-irq-unsafe lock: (k-clock-AF_INET){+++.}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock include/linux/rwlock_api_smp.h:209 [inline] _raw_write_lock+0x2e/0x40 kernel/locking/spinlock.c:300 l2tp_tunnel_register+0x126/0x1210 net/l2tp/l2tp_core.c:1477 l2tp_nl_cmd_tunnel_create+0x3d6/0x8b0 net/l2tp/l2tp_netlink.c:245 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:756 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline] genl_rcv_msg+0x445/0x780 net/netlink/genetlink.c:850 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540 genl_rcv+0x28/0x40 net/netlink/genetlink.c:861 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(k-clock-AF_INET); local_irq_disable(); lock(&tcp_hashinfo.bhash2[i].lock); lock(k-clock-AF_INET); lock(&tcp_hashinfo.bhash2[i].lock); *** DEADLOCK *** 4 locks held by syz-executor.0/8449: #0: ffff8880794f0130 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1721 [inline] #0: ffff8880794f0130 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_listen+0x8c/0x400 net/mptcp/protocol.c:3670 #1: ffff888050c08130 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1721 [inline] #1: ffff888050c08130 (k-sk_lock-AF_INET){+.+.}-{0:0}, at: inet_listen+0x93/0x640 net/ipv4/af_inet.c:199 #2: ffffc90000b328c0 (&tcp_hashinfo.bhash[i].lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:355 [inline] #2: ffffc90000b328c0 (&tcp_hashinfo.bhash[i].lock){+.-.}-{2:2}, at: inet_csk_find_open_port net/ipv4/inet_connection_sock.c:332 [inline] #2: ffffc90000b328c0 (&tcp_hashinfo.bhash[i].lock){+.-.}-{2:2}, at: inet_csk_get_port+0xb30/0x2640 net/ipv4/inet_connection_sock.c:484 #3: ffffc90000d00848 (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #3: ffffc90000d00848 (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2}, at: inet_csk_find_open_port net/ipv4/inet_connection_sock.c:339 [inline] #3: ffffc90000d00848 (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2}, at: inet_csk_get_port+0xd94/0x2640 net/ipv4/inet_connection_sock.c:484 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&tcp_hashinfo.bhash2[i].lock){+.-.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] inet_csk_get_port+0x13e1/0x2640 net/ipv4/inet_connection_sock.c:524 __inet6_bind+0x625/0x1b20 net/ipv6/af_inet6.c:412 inet6_bind+0x177/0x220 net/ipv6/af_inet6.c:471 rds_tcp_listen_init+0x2a9/0x4e0 net/rds/tcp_listen.c:307 rds_tcp_init_net+0x21d/0x4f0 net/rds/tcp.c:573 ops_init+0xb9/0x680 net/core/net_namespace.c:135 __register_pernet_operations net/core/net_namespace.c:1153 [inline] register_pernet_operations+0x35a/0x850 net/core/net_namespace.c:1222 register_pernet_device+0x2a/0x80 net/core/net_namespace.c:1309 rds_tcp_init+0x65/0xd3 net/rds/tcp.c:731 do_one_initcall+0x141/0x780 init/main.c:1303 do_initcall_level init/main.c:1376 [inline] do_initcalls init/main.c:1392 [inline] do_basic_setup init/main.c:1411 [inline] kernel_init_freeable+0x6ff/0x788 init/main.c:1631 kernel_init+0x1e/0x1d0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] __inet_inherit_port+0x29f/0x14e0 net/ipv4/inet_hashtables.c:230 tcp_v4_syn_recv_sock+0xb5b/0x14c0 net/ipv4/tcp_ipv4.c:1588 tcp_check_req+0x632/0x1aa0 net/ipv4/tcp_minisocks.c:786 tcp_v4_rcv+0x24b4/0x3980 net/ipv4/tcp_ipv4.c:2030 ip_protocol_deliver_rcu+0x9f/0x7c0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2ec/0x4c0 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ip_local_deliver+0x1ae/0x200 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:455 [inline] ip_sublist_rcv_finish+0x9a/0x2c0 net/ipv4/ip_input.c:575 ip_list_rcv_finish net/ipv4/ip_input.c:625 [inline] ip_sublist_rcv+0x533/0x980 net/ipv4/ip_input.c:633 ip_list_rcv+0x31e/0x470 net/ipv4/ip_input.c:668 __netif_receive_skb_list_ptype net/core/dev.c:5532 [inline] __netif_receive_skb_list_core+0x548/0x8f0 net/core/dev.c:5580 __netif_receive_skb_list net/core/dev.c:5632 [inline] netif_receive_skb_list_internal+0x75f/0xd90 net/core/dev.c:5723 gro_normal_list include/net/gro.h:433 [inline] gro_normal_list include/net/gro.h:429 [inline] napi_complete_done+0x1f5/0x890 net/core/dev.c:6064 e1000_clean+0x9b3/0x1c40 drivers/net/ethernet/intel/e1000/e1000_main.c:3811 __napi_poll+0xb8/0x770 net/core/dev.c:6498 napi_poll net/core/dev.c:6565 [inline] net_rx_action+0xa00/0xde0 net/core/dev.c:6676 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 common_interrupt+0xad/0xd0 arch/x86/kernel/irq.c:240 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640 writel arch/x86/include/asm/io.h:69 [inline] e1000_watchdog+0x791/0x1080 drivers/net/ethernet/intel/e1000/e1000_main.c:2543 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:350 [inline] inet_csk_get_port+0x13e1/0x2640 net/ipv4/inet_connection_sock.c:524 __inet6_bind+0x625/0x1b20 net/ipv6/af_inet6.c:412 inet6_bind+0x177/0x220 net/ipv6/af_inet6.c:471 rds_tcp_listen_init+0x2a9/0x4e0 net/rds/tcp_listen.c:307 rds_tcp_init_net+0x21d/0x4f0 net/rds/tcp.c:573 ops_init+0xb9/0x680 net/core/net_namespace.c:135 __register_pernet_operations net/core/net_namespace.c:1153 [inline] register_pernet_operations+0x35a/0x850 net/core/net_namespace.c:1222 register_pernet_device+0x2a/0x80 net/core/net_namespace.c:1309 rds_tcp_init+0x65/0xd3 net/rds/tcp.c:731 do_one_initcall+0x141/0x780 init/main.c:1303 do_initcall_level init/main.c:1376 [inline] do_initcalls init/main.c:1392 [inline] do_basic_setup init/main.c:1411 [inline] kernel_init_freeable+0x6ff/0x788 init/main.c:1631 kernel_init+0x1e/0x1d0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 } ... key at: [] __key.0+0x0/0x40 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (k-clock-AF_INET){+++.}-{2:2} { HARDIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline] _raw_write_lock_bh+0x33/0x40 kernel/locking/spinlock.c:334 sock_orphan include/net/sock.h:2090 [inline] dccp_close+0x4c8/0xd60 net/dccp/proto.c:1039 inet_release+0x132/0x270 net/ipv4/af_inet.c:428 __sock_release net/socket.c:650 [inline] sock_release+0x8b/0x1b0 net/socket.c:678 inet_ctl_sock_destroy include/net/inet_common.h:71 [inline] dccp_v4_exit_net+0x15a/0x2c0 net/dccp/ipv4.c:1050 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169 cleanup_net+0x4ee/0xb00 net/core/net_namespace.c:601 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_bh include/linux/rwlock_api_smp.h:176 [inline] _raw_read_lock_bh+0x3f/0x70 kernel/locking/spinlock.c:252 sock_i_uid+0x1f/0xb0 net/core/sock.c:2542 udp_lib_lport_inuse+0x32/0x490 net/ipv4/udp.c:140 udp_lib_get_port+0x835/0x18c0 net/ipv4/udp.c:306 __inet_bind+0x831/0xc90 net/ipv4/af_inet.c:525 inet_bind+0x177/0x220 net/ipv4/af_inet.c:456 udp_sock_create4+0x1d1/0x490 net/ipv4/udp_tunnel_core.c:30 udp_sock_create include/net/udp_tunnel.h:59 [inline] rxe_setup_udp_tunnel.constprop.0+0xfc/0x220 drivers/infiniband/sw/rxe/rxe_net.c:186 rxe_net_ipv4_init drivers/infiniband/sw/rxe/rxe_net.c:622 [inline] rxe_net_init+0x1f/0xd0 drivers/infiniband/sw/rxe/rxe_net.c:667 rxe_module_init+0x10/0x49 drivers/infiniband/sw/rxe/rxe.c:213 do_one_initcall+0x141/0x780 init/main.c:1303 do_initcall_level init/main.c:1376 [inline] do_initcalls init/main.c:1392 [inline] do_basic_setup init/main.c:1411 [inline] kernel_init_freeable+0x6ff/0x788 init/main.c:1631 kernel_init+0x1e/0x1d0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 SOFTIRQ-ON-W at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock include/linux/rwlock_api_smp.h:209 [inline] _raw_write_lock+0x2e/0x40 kernel/locking/spinlock.c:300 l2tp_tunnel_register+0x126/0x1210 net/l2tp/l2tp_core.c:1477 l2tp_nl_cmd_tunnel_create+0x3d6/0x8b0 net/l2tp/l2tp_netlink.c:245 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:756 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline] genl_rcv_msg+0x445/0x780 net/netlink/genetlink.c:850 netlink_rcv_skb+0x157/0x430 net/netlink/af_netlink.c:2540 genl_rcv+0x28/0x40 net/netlink/genetlink.c:861 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x91b/0xe10 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 ____sys_sendmsg+0x712/0x8c0 net/socket.c:2482 ___sys_sendmsg+0x110/0x1b0 net/socket.c:2536 __sys_sendmsg+0xf7/0x1c0 net/socket.c:2565 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_write_lock_bh include/linux/rwlock_api_smp.h:202 [inline] _raw_write_lock_bh+0x33/0x40 kernel/locking/spinlock.c:334 sock_orphan include/net/sock.h:2090 [inline] dccp_close+0x4c8/0xd60 net/dccp/proto.c:1039 inet_release+0x132/0x270 net/ipv4/af_inet.c:428 __sock_release net/socket.c:650 [inline] sock_release+0x8b/0x1b0 net/socket.c:678 inet_ctl_sock_destroy include/net/inet_common.h:71 [inline] dccp_v4_exit_net+0x15a/0x2c0 net/dccp/ipv4.c:1050 ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169 cleanup_net+0x4ee/0xb00 net/core/net_namespace.c:601 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_bh include/linux/rwlock_api_smp.h:176 [inline] _raw_read_lock_bh+0x3f/0x70 kernel/locking/spinlock.c:252 sock_i_uid+0x1f/0xb0 net/core/sock.c:2542 udp_lib_lport_inuse+0x32/0x490 net/ipv4/udp.c:140 udp_lib_get_port+0x835/0x18c0 net/ipv4/udp.c:306 __inet_bind+0x831/0xc90 net/ipv4/af_inet.c:525 inet_bind+0x177/0x220 net/ipv4/af_inet.c:456 udp_sock_create4+0x1d1/0x490 net/ipv4/udp_tunnel_core.c:30 udp_sock_create include/net/udp_tunnel.h:59 [inline] rxe_setup_udp_tunnel.constprop.0+0xfc/0x220 drivers/infiniband/sw/rxe/rxe_net.c:186 rxe_net_ipv4_init drivers/infiniband/sw/rxe/rxe_net.c:622 [inline] rxe_net_init+0x1f/0xd0 drivers/infiniband/sw/rxe/rxe_net.c:667 rxe_module_init+0x10/0x49 drivers/infiniband/sw/rxe/rxe.c:213 do_one_initcall+0x141/0x780 init/main.c:1303 do_initcall_level init/main.c:1376 [inline] do_initcalls init/main.c:1392 [inline] do_basic_setup init/main.c:1411 [inline] kernel_init_freeable+0x6ff/0x788 init/main.c:1631 kernel_init+0x1e/0x1d0 init/main.c:1519 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 } ... key at: [] af_kern_callback_keys+0x20/0x300 ... acquired at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_bh include/linux/rwlock_api_smp.h:176 [inline] _raw_read_lock_bh+0x3f/0x70 kernel/locking/spinlock.c:252 sock_i_uid+0x1f/0xb0 net/core/sock.c:2542 inet_csk_update_fastreuse+0x2d/0xb30 net/ipv4/inet_connection_sock.c:416 inet_csk_get_port+0x1443/0x2640 net/ipv4/inet_connection_sock.c:543 inet_csk_listen_start+0x142/0x3c0 net/ipv4/inet_connection_sock.c:1205 inet_listen+0x235/0x640 net/ipv4/af_inet.c:228 mptcp_listen+0x1c2/0x400 net/mptcp/protocol.c:3681 __sys_listen+0x181/0x250 net/socket.c:1810 __do_sys_listen net/socket.c:1819 [inline] __se_sys_listen net/socket.c:1817 [inline] __ia32_sys_listen+0x54/0x80 net/socket.c:1817 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 stack backtrace: CPU: 1 PID: 8449 Comm: syz-executor.0 Not tainted 6.1.0-rc5-syzkaller-00326-g77c51ba552a1 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2611 [inline] check_irq_usage.cold+0x4e4/0x761 kernel/locking/lockdep.c:2850 check_prev_add kernel/locking/lockdep.c:3101 [inline] check_prevs_add kernel/locking/lockdep.c:3216 [inline] validate_chain kernel/locking/lockdep.c:3831 [inline] __lock_acquire+0x2a5b/0x56d0 kernel/locking/lockdep.c:5055 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock_bh include/linux/rwlock_api_smp.h:176 [inline] _raw_read_lock_bh+0x3f/0x70 kernel/locking/spinlock.c:252 sock_i_uid+0x1f/0xb0 net/core/sock.c:2542 inet_csk_update_fastreuse+0x2d/0xb30 net/ipv4/inet_connection_sock.c:416 inet_csk_get_port+0x1443/0x2640 net/ipv4/inet_connection_sock.c:543 inet_csk_listen_start+0x142/0x3c0 net/ipv4/inet_connection_sock.c:1205 inet_listen+0x235/0x640 net/ipv4/af_inet.c:228 mptcp_listen+0x1c2/0x400 net/mptcp/protocol.c:3681 __sys_listen+0x181/0x250 net/socket.c:1810 __do_sys_listen net/socket.c:1819 [inline] __se_sys_listen net/socket.c:1817 [inline] __ia32_sys_listen+0x54/0x80 net/socket.c:1817 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f09549 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 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f045cc EFLAGS: 00000296 ORIG_RAX: 000000000000016b RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi