===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.2.0-rc4-syzkaller-00067-g7287904c8771 #0 Not tainted ----------------------------------------------------- syz-executor.0/24198 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff88807c205750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:996 [inline] ffff88807c205750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync fs/fcntl.c:1017 [inline] ffff88807c205750 (&new->fa_lock){...-}-{2:2}, at: kill_fasync+0x13a/0x480 fs/fcntl.c:1010 and this task is already holding: ffff888044378028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] ffff888044378028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 which would create a new lock dependency: (&client->buffer_lock){..-.}-{2:2} -> (&new->fa_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:1649 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1530 hid_process_report drivers/hid/hid-core.c:1678 [inline] hid_report_raw_event+0x9fa/0x1270 drivers/hid/hid-core.c:2001 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2069 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 lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636 __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] lockref_get_not_dead+0x18/0x80 lib/lockref.c:184 __legitimize_path+0x7f/0x1c0 fs/namei.c:705 legitimize_path fs/namei.c:715 [inline] legitimize_root fs/namei.c:743 [inline] try_to_unlazy+0x321/0x620 fs/namei.c:778 may_lookup fs/namei.c:1712 [inline] link_path_walk.part.0+0x7d6/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2244 [inline] path_lookupat+0xb7/0x840 fs/namei.c:2473 filename_lookup+0x1d2/0x590 fs/namei.c:2503 vfs_statx+0x14c/0x430 fs/stat.c:232 vfs_fstatat+0x90/0xb0 fs/stat.c:270 __do_sys_newfstatat+0x94/0x120 fs/stat.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 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 --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&client->buffer_lock); lock(&new->fa_lock); lock(&client->buffer_lock); *** DEADLOCK *** 7 locks held by syz-executor.0/24198: #0: ffff8880245ec110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x1d7/0x760 drivers/input/evdev.c:513 #1: ffff888023700230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0x9f/0x330 drivers/input/input.c:457 #2: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:66 [inline] #2: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: is_event_supported drivers/input/input.c:63 [inline] #2: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0x8b/0x330 drivers/input/input.c:456 #3: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: input_pass_values.part.0+0x0/0x710 drivers/input/input.c:2523 #4: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x5d/0x3e0 drivers/input/evdev.c:296 #5: ffff888044378028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #5: ffff888044378028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values.part.0+0xf6/0x960 drivers/input/evdev.c:261 #6: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x45/0x480 fs/fcntl.c:1015 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:1649 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1530 hid_process_report drivers/hid/hid-core.c:1678 [inline] hid_report_raw_event+0x9fa/0x1270 drivers/hid/hid-core.c:2001 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2069 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 lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636 __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] lockref_get_not_dead+0x18/0x80 lib/lockref.c:184 __legitimize_path+0x7f/0x1c0 fs/namei.c:705 legitimize_path fs/namei.c:715 [inline] legitimize_root fs/namei.c:743 [inline] try_to_unlazy+0x321/0x620 fs/namei.c:778 may_lookup fs/namei.c:1712 [inline] link_path_walk.part.0+0x7d6/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2244 [inline] path_lookupat+0xb7/0x840 fs/namei.c:2473 filename_lookup+0x1d2/0x590 fs/namei.c:2503 vfs_statx+0x14c/0x430 fs/stat.c:232 vfs_fstatat+0x90/0xb0 fs/stat.c:270 __do_sys_newfstatat+0x94/0x120 fs/stat.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 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_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:1649 hid_process_event+0x491/0x570 drivers/hid/hid-core.c:1530 hid_process_report drivers/hid/hid-core.c:1678 [inline] hid_report_raw_event+0x9fa/0x1270 drivers/hid/hid-core.c:2001 hid_input_report+0x363/0x4d0 drivers/hid/hid-core.c:2069 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 lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636 __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] lockref_get_not_dead+0x18/0x80 lib/lockref.c:184 __legitimize_path+0x7f/0x1c0 fs/namei.c:705 legitimize_path fs/namei.c:715 [inline] legitimize_root fs/namei.c:743 [inline] try_to_unlazy+0x321/0x620 fs/namei.c:778 may_lookup fs/namei.c:1712 [inline] link_path_walk.part.0+0x7d6/0xdf0 fs/namei.c:2262 link_path_walk fs/namei.c:2244 [inline] path_lookupat+0xb7/0x840 fs/namei.c:2473 filename_lookup+0x1d2/0x590 fs/namei.c:2503 vfs_statx+0x14c/0x430 fs/stat.c:232 vfs_fstatat+0x90/0xb0 fs/stat.c:270 __do_sys_newfstatat+0x94/0x120 fs/stat.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 } ... key at: [] __key.3+0x0/0x40 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+0x4efb/0x7520 kernel/fork.c:2400 kernel_clone+0xeb/0x990 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: __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigio+0xaf/0x370 fs/fcntl.c:792 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+0x1178/0x16a0 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:3483 [inline] path_openat+0x1200/0x2a50 fs/namei.c:3711 do_filp_open+0x1ba/0x410 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_creat fs/open.c:1402 [inline] __se_sys_creat fs/open.c:1396 [inline] __ia32_sys_creat+0xcc/0x120 fs/open.c:1396 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 -> (&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:817 sk_send_sigurg+0x7a/0x320 net/core/sock.c:3355 tcp_check_urg net/ipv4/tcp_input.c:5626 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5667 tcp_rcv_state_process+0x1705/0x4990 net/ipv4/tcp_input.c:6660 tcp_v6_do_rcv+0x400/0x13c0 net/ipv6/tcp_ipv6.c:1514 tcp_v6_rcv+0x29e8/0x2e00 net/ipv6/tcp_ipv6.c:1748 ip6_protocol_deliver_rcu+0x2dd/0x1280 net/ipv6/ip6_input.c:439 ip6_input_finish+0x150/0x2c0 net/ipv6/ip6_input.c:484 NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ip6_input+0xa0/0xd0 net/ipv6/ip6_input.c:493 dst_input include/net/dst.h:454 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ipv6_rcv+0x250/0x380 net/ipv6/ip6_input.c:309 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5482 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5596 process_backlog+0x3e4/0x810 net/core/dev.c:5924 __napi_poll+0xb8/0x770 net/core/dev.c:6485 napi_poll net/core/dev.c:6552 [inline] net_rx_action+0xa00/0xde0 net/core/dev.c:6663 __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:91 __f_setown fs/fcntl.c:110 [inline] f_setown+0xdb/0x230 fs/fcntl.c:138 do_fcntl+0x34e/0x11a0 fs/fcntl.c:377 do_compat_fcntl64+0x303/0x630 fs/fcntl.c:658 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 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_sigio+0x28/0x370 fs/fcntl.c:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1fc/0x480 fs/fcntl.c:1010 sock_wake_async+0xd6/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2528 [inline] sk_wake_async+0x108/0x290 include/net/sock.h:2524 tcp_rcv_state_process+0x2f43/0x4990 net/ipv4/tcp_input.c:6571 tcp_v6_do_rcv+0x400/0x13c0 net/ipv6/tcp_ipv6.c:1514 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2928 release_sock+0x58/0x1b0 net/core/sock.c:3485 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1484 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:660 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __ia32_sys_sendto+0xdf/0x1b0 net/socket.c:2125 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 } ... 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:778 kill_fasync_rcu fs/fcntl.c:1003 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x1fc/0x480 fs/fcntl.c:1010 sock_wake_async+0xd6/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2528 [inline] sk_wake_async+0x108/0x290 include/net/sock.h:2524 tcp_rcv_state_process+0x2f43/0x4990 net/ipv4/tcp_input.c:6571 tcp_v6_do_rcv+0x400/0x13c0 net/ipv6/tcp_ipv6.c:1514 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2928 release_sock+0x58/0x1b0 net/core/sock.c:3485 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1484 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:660 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __ia32_sys_sendto+0xdf/0x1b0 net/socket.c:2125 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 -> (&new->fa_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 kill_fasync_rcu fs/fcntl.c:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 sock_wake_async+0xd6/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2528 [inline] sk_wake_async include/net/sock.h:2524 [inline] sock_def_readable+0x34d/0x4e0 net/core/sock.c:3299 tcp_data_ready+0x10a/0x520 net/ipv4/tcp_input.c:5006 tcp_data_queue+0x1baa/0x4c50 net/ipv4/tcp_input.c:5080 tcp_rcv_state_process+0x176a/0x4990 net/ipv4/tcp_input.c:6692 tcp_v6_do_rcv+0x400/0x13c0 net/ipv6/tcp_ipv6.c:1514 tcp_v6_rcv+0x29e8/0x2e00 net/ipv6/tcp_ipv6.c:1748 ip6_protocol_deliver_rcu+0x2dd/0x1280 net/ipv6/ip6_input.c:439 ip6_input_finish+0x150/0x2c0 net/ipv6/ip6_input.c:484 NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ip6_input+0xa0/0xd0 net/ipv6/ip6_input.c:493 dst_input include/net/dst.h:454 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:79 [inline] NF_HOOK include/linux/netfilter.h:302 [inline] NF_HOOK include/linux/netfilter.h:296 [inline] ipv6_rcv+0x250/0x380 net/ipv6/ip6_input.c:309 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5482 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5596 process_backlog+0x3e4/0x810 net/core/dev.c:5924 __napi_poll+0xb8/0x770 net/core/dev.c:6485 napi_poll net/core/dev.c:6552 [inline] net_rx_action+0xa00/0xde0 net/core/dev.c:6663 __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 fasync_remove_entry+0xba/0x1f0 fs/fcntl.c:873 fasync_helper+0xa2/0xb0 fs/fcntl.c:976 sock_fasync+0x98/0x140 net/socket.c:1390 __fput+0x8c2/0xa90 fs/file_table.c:317 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_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 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:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 sock_wake_async+0xd6/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2528 [inline] sk_wake_async+0x108/0x290 include/net/sock.h:2524 tcp_rcv_state_process+0x2f43/0x4990 net/ipv4/tcp_input.c:6571 tcp_v6_do_rcv+0x400/0x13c0 net/ipv6/tcp_ipv6.c:1514 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x133/0x3b0 net/core/sock.c:2928 release_sock+0x58/0x1b0 net/core/sock.c:3485 tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1484 inet6_sendmsg+0x9d/0xe0 net/ipv6/af_inet6.c:660 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xd3/0x120 net/socket.c:734 __sys_sendto+0x23a/0x340 net/socket.c:2117 __do_sys_sendto net/socket.c:2129 [inline] __se_sys_sendto net/socket.c:2125 [inline] __ia32_sys_sendto+0xdf/0x1b0 net/socket.c:2125 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 } ... key at: [] __key.0+0x0/0x40 ... acquired 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:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 __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_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: 24198 Comm: syz-executor.0 Not tainted 6.2.0-rc4-syzkaller-00067-g7287904c8771 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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_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:996 [inline] kill_fasync fs/fcntl.c:1017 [inline] kill_fasync+0x13a/0x480 fs/fcntl.c:1010 __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_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: 0023:0xf7fbb549 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:00000000f7fb65cc EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 RDX: 0000000000001698 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