===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.3.0-rc6-syzkaller-00034-ge62252bc55b6 #0 Not tainted ----------------------------------------------------- syz-executor.1/29765 [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: ffff88803aedf2b0 (&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:150 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:387 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 hidinput_hid_event+0x955/0x2060 drivers/hid/hid-input.c:1693 hid_process_event+0x491/0x5c0 drivers/hid/hid-core.c:1534 hid_input_array_field+0x4d7/0x660 drivers/hid/hid-core.c:1646 hid_process_report drivers/hid/hid-core.c:1688 [inline] hid_report_raw_event+0xa74/0x1220 drivers/hid/hid-core.c:2009 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 __sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:526 is_swap_pte include/linux/swapops.h:126 [inline] map_pte mm/page_vma_mapped.c:39 [inline] page_vma_mapped_walk+0x10b8/0x1fd0 mm/page_vma_mapped.c:257 folio_referenced_one+0x2d6/0x860 mm/rmap.c:814 rmap_walk_anon+0x235/0x5b0 mm/rmap.c:2433 rmap_walk mm/rmap.c:2509 [inline] folio_referenced+0x2a2/0x4d0 mm/rmap.c:928 folio_check_references mm/vmscan.c:1483 [inline] shrink_folio_list+0x1989/0x3c80 mm/vmscan.c:1813 reclaim_folio_list+0xd0/0x390 mm/vmscan.c:2723 reclaim_pages+0x442/0x670 mm/vmscan.c:2759 madvise_cold_or_pageout_pte_range+0x16a5/0x22c0 mm/madvise.c:516 walk_pmd_range mm/pagewalk.c:128 [inline] walk_pud_range mm/pagewalk.c:205 [inline] walk_p4d_range mm/pagewalk.c:240 [inline] walk_pgd_range+0xa30/0x1640 mm/pagewalk.c:277 __walk_page_range+0x64b/0x780 mm/pagewalk.c:379 walk_page_range+0x311/0x4a0 mm/pagewalk.c:477 madvise_pageout_page_range mm/madvise.c:574 [inline] madvise_pageout+0x2f8/0x550 mm/madvise.c:601 madvise_vma_behavior+0x60a/0x20c0 mm/madvise.c:1031 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1260 do_madvise.part.0+0x24a/0x340 mm/madvise.c:1439 do_madvise mm/madvise.c:1452 [inline] __do_sys_madvise mm/madvise.c:1452 [inline] __se_sys_madvise mm/madvise.c:1450 [inline] __x64_sys_madvise+0x117/0x150 mm/madvise.c:1450 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 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.1/29765: #0: ffff88802d5d6460 (sb_writers#5){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3473 [inline] #0: ffff88802d5d6460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x2716/0x2750 fs/namei.c:3712 #1: ffff88802e9a4158 (&type->i_mutex_dir_key#5){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff88802e9a4158 (&type->i_mutex_dir_key#5){++++}-{3:3}, at: open_last_lookups fs/namei.c:3481 [inline] #1: ffff88802e9a4158 (&type->i_mutex_dir_key#5){++++}-{3:3}, at: path_openat+0x90f/0x2750 fs/namei.c:3712 #2: ffffffff91e1b1a8 (&fsnotify_mark_srcu){....}-{0:0}, at: fsnotify+0x2f8/0x16e0 fs/notify/fsnotify.c:544 #3: ffff88803f1b2358 (&mark->lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #3: ffff88803f1b2358 (&mark->lock){+.+.}-{2:2}, at: dnotify_handle_event+0x4b/0x280 fs/notify/dnotify/dnotify.c:107 #4: ffff88803aedf2b0 (&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:150 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:387 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 hidinput_hid_event+0x955/0x2060 drivers/hid/hid-input.c:1693 hid_process_event+0x491/0x5c0 drivers/hid/hid-core.c:1534 hid_input_array_field+0x4d7/0x660 drivers/hid/hid-core.c:1646 hid_process_report drivers/hid/hid-core.c:1688 [inline] hid_report_raw_event+0xa74/0x1220 drivers/hid/hid-core.c:2009 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 __sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:526 is_swap_pte include/linux/swapops.h:126 [inline] map_pte mm/page_vma_mapped.c:39 [inline] page_vma_mapped_walk+0x10b8/0x1fd0 mm/page_vma_mapped.c:257 folio_referenced_one+0x2d6/0x860 mm/rmap.c:814 rmap_walk_anon+0x235/0x5b0 mm/rmap.c:2433 rmap_walk mm/rmap.c:2509 [inline] folio_referenced+0x2a2/0x4d0 mm/rmap.c:928 folio_check_references mm/vmscan.c:1483 [inline] shrink_folio_list+0x1989/0x3c80 mm/vmscan.c:1813 reclaim_folio_list+0xd0/0x390 mm/vmscan.c:2723 reclaim_pages+0x442/0x670 mm/vmscan.c:2759 madvise_cold_or_pageout_pte_range+0x16a5/0x22c0 mm/madvise.c:516 walk_pmd_range mm/pagewalk.c:128 [inline] walk_pud_range mm/pagewalk.c:205 [inline] walk_p4d_range mm/pagewalk.c:240 [inline] walk_pgd_range+0xa30/0x1640 mm/pagewalk.c:277 __walk_page_range+0x64b/0x780 mm/pagewalk.c:379 walk_page_range+0x311/0x4a0 mm/pagewalk.c:477 madvise_pageout_page_range mm/madvise.c:574 [inline] madvise_pageout+0x2f8/0x550 mm/madvise.c:601 madvise_vma_behavior+0x60a/0x20c0 mm/madvise.c:1031 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1260 do_madvise.part.0+0x24a/0x340 mm/madvise.c:1439 do_madvise mm/madvise.c:1452 [inline] __do_sys_madvise mm/madvise.c:1452 [inline] __se_sys_madvise mm/madvise.c:1450 [inline] __x64_sys_madvise+0x117/0x150 mm/madvise.c:1450 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 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 __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 include/net/sock.h:2514 [inline] sock_def_error_report+0x3a5/0x590 net/core/sock.c:3280 sk_error_report+0x39/0x240 net/core/sock.c:345 mptcp_disconnect.part.0+0x424/0x5f0 net/mptcp/protocol.c:3064 mptcp_disconnect+0x5c/0x70 net/mptcp/protocol.c:3032 __inet_stream_connect+0x20e/0xed0 net/ipv4/af_inet.c:632 mptcp_stream_connect+0xb0/0x110 net/mptcp/protocol.c:3664 __sys_connect_file+0x153/0x1a0 net/socket.c:2001 io_connect+0x3d9/0x7c0 io_uring/net.c:1463 io_issue_sqe+0x4f0/0xd20 io_uring/io_uring.c:1907 io_queue_sqe io_uring/io_uring.c:2079 [inline] io_submit_sqe io_uring/io_uring.c:2340 [inline] io_submit_sqes+0x948/0x1d00 io_uring/io_uring.c:2450 __do_sys_io_uring_enter+0x975/0x26e0 io_uring/io_uring.c:3458 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:5479 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5593 process_backlog+0x239/0x800 net/core/dev.c:5921 __napi_poll+0xb7/0x6f0 net/core/dev.c:6482 napi_poll net/core/dev.c:6549 [inline] net_rx_action+0x9c2/0xd80 net/core/dev.c:6659 __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+0xdb/0x270 fs/fcntl.c:139 do_fcntl+0x34e/0x1240 fs/fcntl.c:378 __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 include/net/sock.h:2514 [inline] sock_def_error_report+0x3a5/0x590 net/core/sock.c:3280 sk_error_report+0x39/0x240 net/core/sock.c:345 mptcp_disconnect.part.0+0x424/0x5f0 net/mptcp/protocol.c:3064 mptcp_disconnect+0x5c/0x70 net/mptcp/protocol.c:3032 __inet_stream_connect+0x20e/0xed0 net/ipv4/af_inet.c:632 mptcp_stream_connect+0xb0/0x110 net/mptcp/protocol.c:3664 __sys_connect_file+0x153/0x1a0 net/socket.c:2001 io_connect+0x3d9/0x7c0 io_uring/net.c:1463 io_issue_sqe+0x4f0/0xd20 io_uring/io_uring.c:1907 io_queue_sqe io_uring/io_uring.c:2079 [inline] io_submit_sqe io_uring/io_uring.c:2340 [inline] io_submit_sqes+0x948/0x1d00 io_uring/io_uring.c:2450 __do_sys_io_uring_enter+0x975/0x26e0 io_uring/io_uring.c:3458 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 dnotify_handle_event+0x14c/0x280 fs/notify/dnotify/dnotify.c:115 fsnotify_handle_inode_event.isra.0+0x22e/0x370 fs/notify/fsnotify.c:264 fsnotify_handle_event fs/notify/fsnotify.c:316 [inline] send_to_group fs/notify/fsnotify.c:364 [inline] fsnotify+0x11cc/0x16e0 fs/notify/fsnotify.c:570 fsnotify_name include/linux/fsnotify.h:36 [inline] fsnotify_name include/linux/fsnotify.h:29 [inline] fsnotify_dirent include/linux/fsnotify.h:42 [inline] fsnotify_create include/linux/fsnotify.h:207 [inline] open_last_lookups fs/namei.c:3486 [inline] path_openat+0x11ea/0x2750 fs/namei.c:3712 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_creat fs/open.c:1440 [inline] __se_sys_creat fs/open.c:1434 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1434 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: 1 PID: 29765 Comm: syz-executor.1 Not tainted 6.3.0-rc6-syzkaller-00034-ge62252bc55b6 #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 dnotify_handle_event+0x14c/0x280 fs/notify/dnotify/dnotify.c:115 fsnotify_handle_inode_event.isra.0+0x22e/0x370 fs/notify/fsnotify.c:264 fsnotify_handle_event fs/notify/fsnotify.c:316 [inline] send_to_group fs/notify/fsnotify.c:364 [inline] fsnotify+0x11cc/0x16e0 fs/notify/fsnotify.c:570 fsnotify_name include/linux/fsnotify.h:36 [inline] fsnotify_name include/linux/fsnotify.h:29 [inline] fsnotify_dirent include/linux/fsnotify.h:42 [inline] fsnotify_create include/linux/fsnotify.h:207 [inline] open_last_lookups fs/namei.c:3486 [inline] path_openat+0x11ea/0x2750 fs/namei.c:3712 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_creat fs/open.c:1440 [inline] __se_sys_creat fs/open.c:1434 [inline] __x64_sys_creat+0xcd/0x120 fs/open.c:1434 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: 0033:0x7f1bb7e8c169 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:00007f1bb8b68168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f1bb7fabf80 RCX: 00007f1bb7e8c169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000 RBP: 00007f1bb7ee7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1bb80cfb1f R14: 00007f1bb8b68300 R15: 0000000000022000