INFO: task syz-executor.3:23801 blocked for more than 143 seconds. Not tainted 6.7.0-syzkaller-11091-g296455ade1fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28720 pid:23801 tgid:23782 ppid:5094 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0xf12/0x5c00 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6817 __lock_sock+0x140/0x260 net/core/sock.c:2948 lock_sock_nested+0xda/0xf0 net/core/sock.c:3528 lock_sock include/net/sock.h:1691 [inline] inet_shutdown+0x67/0x430 net/ipv4/af_inet.c:901 __sys_shutdown_sock net/socket.c:2425 [inline] __sys_shutdown_sock net/socket.c:2419 [inline] __sys_shutdown+0xfd/0x1c0 net/socket.c:2437 __do_sys_shutdown net/socket.c:2445 [inline] __se_sys_shutdown net/socket.c:2443 [inline] __x64_sys_shutdown+0x53/0x80 net/socket.c:2443 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f45e2a7cda9 RSP: 002b:00007f45e37780c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000030 RAX: ffffffffffffffda RBX: 00007f45e2bac1f0 RCX: 00007f45e2a7cda9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000009 RBP: 00007f45e2ac947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f45e2bac1f0 R15: 00007fffb11f9e28 INFO: task syz-executor.3:23805 blocked for more than 144 seconds. Not tainted 6.7.0-syzkaller-11091-g296455ade1fd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28896 pid:23805 tgid:23782 ppid:5094 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0xf12/0x5c00 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0xe9/0x270 kernel/sched/core.c:6817 __lock_sock+0x140/0x260 net/core/sock.c:2948 lock_sock_nested+0xda/0xf0 net/core/sock.c:3528 lock_sock include/net/sock.h:1691 [inline] tcp_recvmsg+0x113/0x670 net/ipv4/tcp.c:2565 inet6_recvmsg+0x114/0x630 net/ipv6/af_inet6.c:676 sock_recvmsg_nosec net/socket.c:1046 [inline] sock_recvmsg+0xe2/0x170 net/socket.c:1068 ____sys_recvmsg+0x21f/0x5c0 net/socket.c:2803 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845 __sys_recvmsg+0x114/0x1e0 net/socket.c:2875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f45e2a7cda9 RSP: 002b:00007f45e37570c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007f45e2bac2c0 RCX: 00007f45e2a7cda9 RDX: 0000000040000110 RSI: 00000000200008c0 RDI: 0000000000000009 RBP: 00007f45e2ac947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f45e2bac2c0 R15: 00007fffb11f9e28 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8d1ace20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d1ace20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d1ace20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 2 locks held by kswapd0/88: 1 lock held by kworker/1:2/1752: 2 locks held by getty/4809: #0: ffff888029eaa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.2/5091: #0: ffff8880afad80e0 (&type->s_umount_key#55){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880afad80e0 (&type->s_umount_key#55){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880afad80e0 (&type->s_umount_key#55){+.+.}-{3:3}, at: deactivate_super+0xd6/0x100 fs/super.c:509 2 locks held by kworker/0:4/5153: #0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608 #1: ffffc90003c6fd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609 2 locks held by syz-executor.3/23790: 1 lock held by syz-executor.3/23801: #0: ffff888077310e30 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff888077310e30 (sk_lock-AF_INET6){+.+.}-{0:0}, at: inet_shutdown+0x67/0x430 net/ipv4/af_inet.c:901 1 lock held by syz-executor.3/23805: #0: ffff888077310e30 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff888077310e30 (sk_lock-AF_INET6){+.+.}-{0:0}, at: tcp_recvmsg+0x113/0x670 net/ipv4/tcp.c:2565 1 lock held by syz-executor.4/24024: 3 locks held by syz-executor.3/24164: 1 lock held by syz-executor.5/24180: 2 locks held by syz-executor.5/24181: 2 locks held by syz-executor.4/24360: 2 locks held by syz-executor.5/24490: 1 lock held by syz-executor.5/24491: 1 lock held by syz-executor.0/24499: 1 lock held by syz-executor.1/24560: 8 locks held by syz-executor.4/24564: #0: ffff888074f6a420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12f/0x250 fs/read_write.c:643 #1: ffff88809c23e888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x27d/0x500 fs/kernfs/file.c:325 #2: ffff888021080ba8 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a0/0x500 fs/kernfs/file.c:326 #3: ffffffff8e34fe88 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216 #4: ffff8880a031b0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline] #4: ffff8880a031b0e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline] #4: ffff8880a031b0e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292 #5: ffff8880a031c250 (&devlink->lock_key#8){+.+.}-{3:3}, at: nsim_drv_remove+0x4a/0x1d0 drivers/net/netdevsim/dev.c:1672 #6: ffffffff8ecbc768 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x39/0x190 drivers/net/netdevsim/netdev.c:411 #7: ffffffff8d1b8678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #7: ffffffff8d1b8678 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x6b1/0x800 kernel/rcu/tree_exp.h:996 1 lock held by syz-executor.5/24579: #0: ffffffff8ecbc768 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8ecbc768 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe00 net/core/rtnetlink.c:6612 2 locks held by syz-executor.0/24607: #0: ffffffff8eca7110 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cc/0x660 net/core/net_namespace.c:491 #1: ffffffff8ecbc768 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:809 [inline] #1: ffffffff8ecbc768 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x136/0x240 net/smc/smc_pnet.c:878 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-syzkaller-11091-g296455ade1fd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x1b/0x20 drivers/acpi/processor_idle.c:112