===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.2.0-syzkaller-00081-g91bc559d8d3a #0 Not tainted ----------------------------------------------------- syz-executor.5/13474 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8c40a098 (tasklist_lock){.+.+}-{2:2}, at: send_sigurg+0xb1/0xae0 fs/fcntl.c:834 and this task is already holding: ffff88807d95dcb0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigurg+0x22/0xae0 fs/fcntl.c:818 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: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] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:149 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:386 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_event drivers/input/input.c:432 [inline] input_event+0x83/0xa0 drivers/input/input.c:424 hidinput_hid_event+0xa2a/0x2010 drivers/hid/hid-input.c:1653 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1533 hid_input_array_field+0x4d7/0x660 drivers/hid/hid-core.c:1645 hid_process_report drivers/hid/hid-core.c:1687 [inline] hid_report_raw_event+0xa89/0x1270 drivers/hid/hid-core.c:2004 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2072 hid_irq_in+0x50f/0x690 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+0x1203/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700 expire_timers+0x2c6/0x5c0 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+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 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:649 __stack_depot_save+0x11e/0x560 lib/stackdepot.c:452 kasan_save_stack+0x35/0x40 mm/kasan/common.c:46 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1e4/0x430 mm/slub.c:3476 vm_area_dup+0x7d/0x380 kernel/fork.c:466 __split_vma+0xae/0x5e0 mm/mmap.c:2211 do_mas_align_munmap+0x7e0/0x1260 mm/mmap.c:2362 do_mas_munmap+0x26e/0x2c0 mm/mmap.c:2502 mmap_region+0x21d/0x1dd0 mm/mmap.c:2550 do_mmap+0x831/0xf60 mm/mmap.c:1411 vm_mmap_pgoff+0x1af/0x280 mm/util.c:520 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1457 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 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: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 *** 2 locks held by syz-executor.5/13474: #0: ffff888022d499b0 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #0: ffff888022d499b0 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_sendmsg+0x21/0x50 net/ipv4/tcp.c:1483 #1: ffff88807d95dcb0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigurg+0x22/0xae0 fs/fcntl.c:818 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: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] evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 evdev_pass_values drivers/input/evdev.c:253 [inline] evdev_events+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:149 [inline] input_event_dispose+0x537/0x730 drivers/input/input.c:386 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_event drivers/input/input.c:432 [inline] input_event+0x83/0xa0 drivers/input/input.c:424 hidinput_hid_event+0xa2a/0x2010 drivers/hid/hid-input.c:1653 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1533 hid_input_array_field+0x4d7/0x660 drivers/hid/hid-core.c:1645 hid_process_report drivers/hid/hid-core.c:1687 [inline] hid_report_raw_event+0xa89/0x1270 drivers/hid/hid-core.c:2004 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2072 hid_irq_in+0x50f/0x690 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+0x1203/0x32d0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700 expire_timers+0x2c6/0x5c0 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+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 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:649 __stack_depot_save+0x11e/0x560 lib/stackdepot.c:452 kasan_save_stack+0x35/0x40 mm/kasan/common.c:46 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1e4/0x430 mm/slub.c:3476 vm_area_dup+0x7d/0x380 kernel/fork.c:466 __split_vma+0xae/0x5e0 mm/mmap.c:2211 do_mas_align_munmap+0x7e0/0x1260 mm/mmap.c:2362 do_mas_munmap+0x26e/0x2c0 mm/mmap.c:2502 mmap_region+0x21d/0x1dd0 mm/mmap.c:2550 do_mmap+0x831/0xf60 mm/mmap.c:1411 vm_mmap_pgoff+0x1af/0x280 mm/util.c:520 ksys_mmap_pgoff+0x41f/0x5a0 mm/mmap.c:1457 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: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] evdev_handle_get_val+0x70/0x5e0 drivers/input/evdev.c:900 evdev_do_ioctl+0xe98/0x1a70 drivers/input/evdev.c:1159 evdev_ioctl_handler drivers/input/evdev.c:1272 [inline] evdev_ioctl+0x149/0x1b0 drivers/input/evdev.c:1281 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __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 sock_fasync+0x98/0x140 net/socket.c:1393 __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+0x23c/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __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+0x13a/0x480 fs/fcntl.c:1011 lease_break_callback+0x23/0x30 fs/locks.c:522 __break_lease+0x3e2/0x1590 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:875 do_open fs/namei.c:3560 [inline] path_openat+0x1ba5/0x2740 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1312 do_sys_open fs/open.c:1328 [inline] __do_sys_open fs/open.c:1336 [inline] __se_sys_open fs/open.c:1332 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1332 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+0x13a/0x480 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+0x35d/0x3e0 drivers/input/evdev.c:306 input_to_handler+0x2a0/0x4c0 drivers/input/input.c:128 input_pass_values.part.0+0x230/0x710 drivers/input/input.c:160 input_pass_values drivers/input/input.c:147 [inline] input_event_dispose+0x5cf/0x730 drivers/input/input.c:375 input_handle_event+0x120/0xe70 drivers/input/input.c:403 input_inject_event+0x1c8/0x330 drivers/input/input.c:462 evdev_write+0x434/0x760 drivers/input/evdev.c:530 vfs_write+0x2db/0xdd0 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __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+0x22/0xae0 fs/fcntl.c:818 sk_send_sigurg+0x7a/0x320 net/core/sock.c:3357 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x897/0x2230 net/ipv4/tcp_input.c:6014 tcp_v4_do_rcv+0x670/0x9b0 net/ipv4/tcp_ipv4.c:1721 tcp_v4_rcv+0x2eab/0x3280 net/ipv4/tcp_ipv4.c:2142 ip_protocol_deliver_rcu+0x9f/0x460 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: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:5474 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5588 process_backlog+0x3e4/0x810 net/core/dev.c:5916 __napi_poll+0xb8/0x770 net/core/dev.c:6477 napi_poll net/core/dev.c:6544 [inline] net_rx_action+0xa00/0xde0 net/core/dev.c:6655 __do_softirq+0x1fb/0xadc kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x31/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x659/0xa20 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __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 generic_add_lease fs/locks.c:1807 [inline] generic_setlease+0x127b/0x18e0 fs/locks.c:1886 vfs_setlease+0x101/0x130 fs/locks.c:1976 do_fcntl_add_lease fs/locks.c:1997 [inline] fcntl_setlease+0x138/0x2c0 fs/locks.c:2019 do_fcntl+0xd30/0x11c0 fs/fcntl.c:404 __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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __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+0x22/0xae0 fs/fcntl.c:818 sk_send_sigurg+0x7a/0x320 net/core/sock.c:3357 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x897/0x2230 net/ipv4/tcp_input.c:6014 tcp_v4_do_rcv+0x670/0x9b0 net/ipv4/tcp_ipv4.c:1721 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2930 release_sock+0x58/0x1b0 net/core/sock.c:3486 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:828 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2128 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+0x28/0x370 fs/fcntl.c:779 kill_fasync_rcu fs/fcntl.c:1004 [inline] kill_fasync fs/fcntl.c:1018 [inline] kill_fasync+0x1fc/0x480 fs/fcntl.c:1011 lease_break_callback+0x23/0x30 fs/locks.c:522 __break_lease+0x3e2/0x1590 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:875 do_open fs/namei.c:3560 [inline] path_openat+0x1ba5/0x2740 fs/namei.c:3715 do_filp_open+0x1ba/0x410 fs/namei.c:3742 do_sys_openat2+0x16d/0x4c0 fs/open.c:1312 do_sys_open fs/open.c:1328 [inline] __do_sys_open fs/open.c:1336 [inline] __se_sys_open fs/open.c:1332 [inline] __x64_sys_open+0x11d/0x1c0 fs/open.c:1332 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:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 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:308 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 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:308 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __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+0x4f0f/0x7530 kernel/fork.c:2400 kernel_clone+0xeb/0x9f0 kernel/fork.c:2681 user_mode_thread+0xb1/0xf0 kernel/fork.c:2757 rest_init+0x27/0x270 init/main.c:697 arch_call_rest_init+0x13/0x1c init/main.c:894 start_kernel+0x44f/0x470 init/main.c:1148 secondary_startup_64_no_verify+0xce/0xdb INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 do_wait+0x2b7/0xd70 kernel/exit.c:1595 kernel_wait+0xa0/0x150 kernel/exit.c:1785 call_usermodehelper_exec_sync kernel/umh.c:140 [inline] call_usermodehelper_exec_work+0xf9/0x180 kernel/umh.c:167 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:308 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigurg+0xb1/0xae0 fs/fcntl.c:834 sk_send_sigurg+0x7a/0x320 net/core/sock.c:3357 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x897/0x2230 net/ipv4/tcp_input.c:6014 tcp_v4_do_rcv+0x670/0x9b0 net/ipv4/tcp_ipv4.c:1721 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2930 release_sock+0x58/0x1b0 net/core/sock.c:3486 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1485 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:828 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2128 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: 13474 Comm: syz-executor.5 Not tainted 6.2.0-syzkaller-00081-g91bc559d8d3a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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 include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigurg+0xb1/0xae0 fs/fcntl.c:834 sk_send_sigurg+0x7a/0x320 net/core/sock.c:3357 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_established+0x897/0x2230 net/ipv4/tcp_input.c:6014 tcp_v4_do_rcv+0x670/0x9b0 net/ipv4/tcp_ipv4.c:1721 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2930 release_sock+0x58/0x1b0 net/core/sock.c:3486 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1485 inet_sendmsg+0x9d/0xe0 net/ipv4/af_inet.c:828 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2120 __do_sys_sendto net/socket.c:2132 [inline] __se_sys_sendto net/socket.c:2128 [inline] __x64_sys_sendto+0xe1/0x1b0 net/socket.c:2128 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: 0033:0x7f920bc8c0f9 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:00007f920c99d168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f920bdac050 RCX: 00007f920bc8c0f9 RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f920bce7ae9 R08: 0000000000000000 R09: 0000000000001500 R10: 000000000000f485 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f920becfb1f R14: 00007f920c99d300 R15: 0000000000022000