===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.3.0-rc7-syzkaller-00060-g789b4a41c247 #0 Not tainted ----------------------------------------------------- syz-executor.5/27899 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8c40a098 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xaf/0x3b0 fs/fcntl.c:793 and this task is already holding: ffff88802a901a30 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x28/0x3b0 fs/fcntl.c:779 which would create a new lock dependency: (&f->f_owner.lock){...-}-{2:2} -> (tasklist_lock){.+.+}-{2:2} but this new dependency connects a SOFTIRQ-irq-safe lock: (&client->buffer_lock){..-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __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] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x3b4/0x430 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x230/0x760 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:376 input_handle_event+0x120/0xe70 drivers/input/input.c:404 input_event drivers/input/input.c:433 [inline] input_event+0x83/0xa0 drivers/input/input.c:425 input_sync include/linux/input.h:450 [inline] hidinput_report_event+0xb2/0x100 drivers/hid/hid-input.c:1716 hid_report_raw_event+0x35a/0x1220 drivers/hid/hid-core.c:2016 hid_input_report+0x341/0x440 drivers/hid/hid-core.c:2083 hid_irq_in+0x357/0x840 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x2b6/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x384/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x13b6/0x3400 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x40/0x50 drivers/acpi/processor_idle.c:112 acpi_idle_do_entry+0x53/0x70 drivers/acpi/processor_idle.c:573 acpi_idle_enter+0x173/0x290 drivers/acpi/processor_idle.c:711 cpuidle_enter_state+0xd3/0x6f0 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388 cpuidle_idle_call kernel/sched/idle.c:215 [inline] do_idle+0x305/0x3e0 kernel/sched/idle.c:282 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379 rest_init+0x16d/0x2b0 init/main.c:736 arch_call_rest_init+0x13/0x30 init/main.c:898 start_kernel+0x35a/0x4d0 init/main.c:1152 secondary_startup_64_no_verify+0xce/0xdb to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x283/0xc30 kernel/exit.c:1602 kernel_wait+0xa0/0x150 kernel/exit.c:1792 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:164 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 other info that might help us debug this: Chain exists of: &client->buffer_lock --> &f->f_owner.lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&client->buffer_lock); lock(&f->f_owner.lock); lock(&client->buffer_lock); *** DEADLOCK *** 5 locks held by syz-executor.5/27899: #0: ffffffff8c978ef0 (file_rwsem){.+.+}-{0:0}, at: break_lease include/linux/filelock.h:360 [inline] #0: ffffffff8c978ef0 (file_rwsem){.+.+}-{0:0}, at: break_lease include/linux/filelock.h:350 [inline] #0: ffffffff8c978ef0 (file_rwsem){.+.+}-{0:0}, at: do_dentry_open+0x65e/0x13f0 fs/open.c:911 #1: ffff88801d8dcbc8 (&ctx->flc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #1: ffff88801d8dcbc8 (&ctx->flc_lock){+.+.}-{2:2}, at: __break_lease+0x20c/0x12d0 fs/locks.c:1494 #2: ffffffff8c7955c0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x45/0x4f0 fs/fcntl.c:1016 #3: ffff88807bdf6c90 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:997 [inline] #3: ffff88807bdf6c90 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1018 [inline] #3: ffff88807bdf6c90 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x139/0x4f0 fs/fcntl.c:1011 #4: ffff88802a901a30 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x28/0x3b0 fs/fcntl.c:779 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&client->buffer_lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __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] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x3b4/0x430 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x230/0x760 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:376 input_handle_event+0x120/0xe70 drivers/input/input.c:404 input_event drivers/input/input.c:433 [inline] input_event+0x83/0xa0 drivers/input/input.c:425 input_sync include/linux/input.h:450 [inline] hidinput_report_event+0xb2/0x100 drivers/hid/hid-input.c:1716 hid_report_raw_event+0x35a/0x1220 drivers/hid/hid-core.c:2016 hid_input_report+0x341/0x440 drivers/hid/hid-core.c:2083 hid_irq_in+0x357/0x840 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x2b6/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x384/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x13b6/0x3400 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751 __run_timers kernel/time/timer.c:2022 [inline] __run_timers kernel/time/timer.c:1995 [inline] run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x40/0x50 drivers/acpi/processor_idle.c:112 acpi_idle_do_entry+0x53/0x70 drivers/acpi/processor_idle.c:573 acpi_idle_enter+0x173/0x290 drivers/acpi/processor_idle.c:711 cpuidle_enter_state+0xd3/0x6f0 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:388 cpuidle_idle_call kernel/sched/idle.c:215 [inline] do_idle+0x305/0x3e0 kernel/sched/idle.c:282 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:379 rest_init+0x16d/0x2b0 init/main.c:736 arch_call_rest_init+0x13/0x30 init/main.c:898 start_kernel+0x35a/0x4d0 init/main.c:1152 secondary_startup_64_no_verify+0xce/0xdb INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __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] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x3b4/0x430 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x230/0x760 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:376 input_handle_event+0x120/0xe70 drivers/input/input.c:404 input_inject_event+0x1c7/0x390 drivers/input/input.c:463 evdev_write+0x434/0x760 drivers/input/evdev.c:530 vfs_write+0x2db/0xe10 fs/read_write.c:582 ksys_write+0x1ec/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd } ... key at: [] __key.3+0x0/0x40 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 fasync_remove_entry+0xba/0x1f0 fs/fcntl.c:874 fasync_helper+0xa2/0xb0 fs/fcntl.c:977 tun_chr_fasync+0x54/0x170 drivers/net/tun.c:3419 __fput+0x8c2/0xa90 fs/file_table.c:318 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:997 [inline] kill_fasync fs/fcntl.c:1018 [inline] kill_fasync+0x139/0x4f0 fs/fcntl.c:1011 sock_wake_async+0xd6/0x160 net/socket.c:1449 sk_wake_async include/net/sock.h:2518 [inline] sk_wake_async+0x108/0x2f0 include/net/sock.h:2514 tcp_rcv_state_process+0x2faf/0x4a10 net/ipv4/tcp_input.c:6571 tcp_v6_do_rcv+0x400/0x15c0 net/ipv6/tcp_ipv6.c:1512 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2922 release_sock+0x58/0x1b0 net/core/sock.c:3489 inet_wait_for_connect net/ipv4/af_inet.c:596 [inline] __inet_stream_connect+0x757/0xed0 net/ipv4/af_inet.c:688 tcp_sendmsg_fastopen+0x3c4/0x710 net/ipv4/tcp.c:1201 tcp_sendmsg_locked+0x1a0b/0x2950 net/ipv4/tcp.c:1249 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1484 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:651 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd } ... key at: [] __key.0+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:997 [inline] kill_fasync fs/fcntl.c:1018 [inline] kill_fasync+0x139/0x4f0 fs/fcntl.c:1011 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values.part.0+0x667/0x960 drivers/input/evdev.c:278 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x3b4/0x430 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:129 input_pass_values.part.0+0x230/0x760 drivers/input/input.c:161 input_pass_values drivers/input/input.c:148 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:376 input_handle_event+0x120/0xe70 drivers/input/input.c:404 input_inject_event+0x1c7/0x390 drivers/input/input.c:463 evdev_write+0x434/0x760 drivers/input/evdev.c:530 vfs_write+0x2db/0xe10 fs/read_write.c:582 ksys_write+0x1ec/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> (&f->f_owner.lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x49/0x90 kernel/locking/spinlock.c:236 send_sigurg+0x22/0xbd0 fs/fcntl.c:818 sk_send_sigurg+0x7a/0x370 net/core/sock.c:3351 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x817/0x1f80 net/ipv4/tcp_input.c:6014 tcp_v4_do_rcv+0x663/0x9d0 net/ipv4/tcp_ipv4.c:1721 tcp_v4_rcv+0x2eac/0x3280 net/ipv4/tcp_ipv4.c:2143 ip_protocol_deliver_rcu+0x9f/0x480 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2ec/0x520 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:454 [inline] ip_rcv_finish+0x1cf/0x2f0 net/ipv4/ip_input.c:449 NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ip_rcv+0xae/0xd0 net/ipv4/ip_input.c:569 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5480 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5594 process_backlog+0x239/0x800 net/core/dev.c:5922 __napi_poll+0xb7/0x6f0 net/core/dev.c:6483 napi_poll net/core/dev.c:6550 [inline] net_rx_action+0x9c2/0xd80 net/core/dev.c:6660 __do_softirq+0x1d4/0x905 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x31/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 f_modown+0x2a/0x390 fs/fcntl.c:92 __f_setown fs/fcntl.c:111 [inline] f_setown_ex fs/fcntl.c:201 [inline] do_fcntl+0xb39/0x1240 fs/fcntl.c:384 __do_sys_fcntl fs/fcntl.c:455 [inline] __se_sys_fcntl fs/fcntl.c:440 [inline] __x64_sys_fcntl+0x163/0x1d0 fs/fcntl.c:440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 send_sigurg+0x22/0xbd0 fs/fcntl.c:818 sk_send_sigurg+0x7a/0x370 net/core/sock.c:3351 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x817/0x1f80 net/ipv4/tcp_input.c:6014 tcp_v4_do_rcv+0x663/0x9d0 net/ipv4/tcp_ipv4.c:1721 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2922 release_sock+0x58/0x1b0 net/core/sock.c:3489 sk_stream_wait_memory+0x72f/0xf30 net/core/stream.c:145 tcp_sendmsg_locked+0x944/0x2950 net/ipv4/tcp.c:1446 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1484 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:825 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd } ... key at: [] __key.5+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x3b0 fs/fcntl.c:779 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1018 [inline] kill_fasync+0x1fb/0x4f0 fs/fcntl.c:1011 sock_wake_async+0xd6/0x160 net/socket.c:1449 sk_wake_async include/net/sock.h:2518 [inline] sk_wake_async+0x108/0x2f0 include/net/sock.h:2514 tcp_rcv_state_process+0x2faf/0x4a10 net/ipv4/tcp_input.c:6571 tcp_v6_do_rcv+0x400/0x15c0 net/ipv6/tcp_ipv6.c:1512 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2922 release_sock+0x58/0x1b0 net/core/sock.c:3489 inet_wait_for_connect net/ipv4/af_inet.c:596 [inline] __inet_stream_connect+0x757/0xed0 net/ipv4/af_inet.c:688 tcp_sendmsg_fastopen+0x3c4/0x710 net/ipv4/tcp.c:1201 tcp_sendmsg_locked+0x1a0b/0x2950 net/ipv4/tcp.c:1249 tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1484 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:651 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg+0xde/0x190 net/socket.c:747 __sys_sendto+0x23a/0x340 net/socket.c:2142 __do_sys_sendto net/socket.c:2154 [inline] __se_sys_sendto net/socket.c:2150 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2150 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x283/0xc30 kernel/exit.c:1602 kernel_wait+0xa0/0x150 kernel/exit.c:1792 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:164 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x283/0xc30 kernel/exit.c:1602 kernel_wait+0xa0/0x150 kernel/exit.c:1792 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:164 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 copy_process+0x47e5/0x7590 kernel/fork.c:2401 kernel_clone+0xeb/0x890 kernel/fork.c:2682 user_mode_thread+0xb1/0xf0 kernel/fork.c:2758 rest_init+0x27/0x2b0 init/main.c:701 arch_call_rest_init+0x13/0x30 init/main.c:898 start_kernel+0x35a/0x4d0 init/main.c:1152 secondary_startup_64_no_verify+0xce/0xdb INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x283/0xc30 kernel/exit.c:1602 kernel_wait+0xa0/0x150 kernel/exit.c:1792 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:164 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigio+0xaf/0x3b0 fs/fcntl.c:793 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1018 [inline] kill_fasync+0x1fb/0x4f0 fs/fcntl.c:1011 lease_break_callback+0x23/0x30 fs/locks.c:522 __break_lease+0x3db/0x12d0 fs/locks.c:1522 break_lease include/linux/filelock.h:360 [inline] break_lease include/linux/filelock.h:350 [inline] do_dentry_open+0x65e/0x13f0 fs/open.c:911 do_open fs/namei.c:3560 [inline] path_openat+0x1baa/0x2750 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_open fs/open.c:1372 [inline] __se_sys_open fs/open.c:1368 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd stack backtrace: CPU: 0 PID: 27899 Comm: syz-executor.5 Not tainted 6.3.0-rc7-syzkaller-00060-g789b4a41c247 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2612 [inline] check_irq_usage+0x114e/0x1a40 kernel/locking/lockdep.c:2851 check_prev_add kernel/locking/lockdep.c:3102 [inline] check_prevs_add kernel/locking/lockdep.c:3217 [inline] validate_chain kernel/locking/lockdep.c:3832 [inline] __lock_acquire+0x2edf/0x5d40 kernel/locking/lockdep.c:5056 lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigio+0xaf/0x3b0 fs/fcntl.c:793 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1018 [inline] kill_fasync+0x1fb/0x4f0 fs/fcntl.c:1011 lease_break_callback+0x23/0x30 fs/locks.c:522 __break_lease+0x3db/0x12d0 fs/locks.c:1522 break_lease include/linux/filelock.h:360 [inline] break_lease include/linux/filelock.h:350 [inline] do_dentry_open+0x65e/0x13f0 fs/open.c:911 do_open fs/namei.c:3560 [inline] path_openat+0x1baa/0x2750 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_open fs/open.c:1372 [inline] __se_sys_open fs/open.c:1368 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe01088c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe0115c8168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fe0109abf80 RCX: 00007fe01088c169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200 RBP: 00007fe0108e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe010acfb1f R14: 00007fe0115c8300 R15: 0000000000022000