WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 5.19.0-rc3-syzkaller-00027-g78ca55889a54 #0 Not tainted ----------------------------------------------------- syz-executor.3/10036 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffffffff8ba0a098 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xab/0x380 fs/fcntl.c:791 and this task is already holding: ffff88804210a8b0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x24/0x380 fs/fcntl.c:777 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: (&group->lock){..-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 _snd_pcm_stream_lock_irqsave+0x9f/0xd0 sound/core/pcm_native.c:170 snd_pcm_period_elapsed+0x1d/0x50 sound/core/pcm_lib.c:1848 dummy_hrtimer_callback+0x94/0x1b0 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 other info that might help us debug this: Chain exists of: &group->lock --> &f->f_owner.lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&group->lock); lock(&f->f_owner.lock); lock(&group->lock); *** DEADLOCK *** 6 locks held by syz-executor.3/10036: #0: ffff88805a0b6460 (sb_writers#5){.+.+}-{0:0}, at: do_open fs/namei.c:3513 [inline] #0: ffff88805a0b6460 (sb_writers#5){.+.+}-{0:0}, at: path_openat+0x1b3c/0x2910 fs/namei.c:3653 #1: ffffffff8bf558b0 (file_rwsem){++++}-{0:0}, at: break_lease include/linux/fs.h:2503 [inline] #1: ffffffff8bf558b0 (file_rwsem){++++}-{0:0}, at: break_lease include/linux/fs.h:2493 [inline] #1: ffffffff8bf558b0 (file_rwsem){++++}-{0:0}, at: do_dentry_open+0x432/0x11f0 fs/open.c:839 #2: ffff888074b5c4e8 (&ctx->flc_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #2: ffff888074b5c4e8 (&ctx->flc_lock){+.+.}-{2:2}, at: __break_lease+0x208/0x1420 fs/locks.c:1507 #3: ffffffff8bd86ba0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x41/0x470 fs/fcntl.c:1014 #4: ffff88802532f408 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:995 [inline] #4: ffff88802532f408 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1016 [inline] #4: ffff88802532f408 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x136/0x470 fs/fcntl.c:1009 #5: ffff88804210a8b0 (&f->f_owner.lock){...-}-{2:2}, at: send_sigio+0x24/0x380 fs/fcntl.c:777 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&group->lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 _snd_pcm_stream_lock_irqsave+0x9f/0xd0 sound/core/pcm_native.c:170 snd_pcm_period_elapsed+0x1d/0x50 sound/core/pcm_lib.c:1848 dummy_hrtimer_callback+0x94/0x1b0 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170 spin_lock_irq include/linux/spinlock.h:374 [inline] snd_pcm_group_lock_irq sound/core/pcm_native.c:97 [inline] snd_pcm_stream_lock_irq sound/core/pcm_native.c:136 [inline] snd_pcm_status64+0x99d/0x1660 sound/core/pcm_native.c:998 snd_pcm_status_user32+0x117/0x2d0 sound/core/pcm_native.c:1111 snd_pcm_ioctl_compat+0x679/0x12b0 sound/core/pcm_compat.c:624 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:968 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 } ... key at: [] __key.8+0x0/0x40 -> (&card->ctl_files_rwlock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236 snd_ctl_notify.part.0+0x36/0x560 sound/core/control.c:159 snd_ctl_notify+0x8f/0xb0 sound/core/control.c:187 loopback_active_notify sound/drivers/aloop.c:372 [inline] loopback_trigger+0x4af/0x1b10 sound/drivers/aloop.c:426 snd_pcm_do_stop sound/core/pcm_native.c:1499 [inline] snd_pcm_do_stop+0x17c/0x230 sound/core/pcm_native.c:1494 snd_pcm_action_single sound/core/pcm_native.c:1281 [inline] snd_pcm_drain_done+0xb9/0x120 sound/core/pcm_native.c:1550 snd_pcm_update_state+0x43b/0x540 sound/core/pcm_lib.c:191 snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465 snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817 snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849 loopback_jiffies_timer_function+0x1c4/0x240 sound/drivers/aloop.c:668 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x679/0xa80 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649 variable_test_bit arch/x86/include/asm/bitops.h:214 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:135 [inline] cpumask_test_cpu include/linux/cpumask.h:379 [inline] cpu_online include/linux/cpumask.h:921 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0xa9/0x780 kernel/locking/lockdep.c:5676 rcu_lock_release include/linux/rcupdate.h:274 [inline] rcu_read_unlock include/linux/rcupdate.h:728 [inline] get_mem_cgroup_from_objcg+0xb9/0x260 include/linux/memcontrol.h:542 obj_cgroup_charge_pages mm/memcontrol.c:2997 [inline] obj_cgroup_charge+0x29a/0x5e0 mm/memcontrol.c:3289 memcg_slab_pre_alloc_hook mm/slab.h:505 [inline] slab_pre_alloc_hook mm/slab.h:728 [inline] slab_alloc_node mm/slub.c:3157 [inline] kmem_cache_alloc_node+0x99/0x3f0 mm/slub.c:3293 alloc_task_struct_node kernel/fork.c:172 [inline] dup_task_struct kernel/fork.c:969 [inline] copy_process+0x5c4/0x7020 kernel/fork.c:2071 kernel_clone+0xe7/0xab0 kernel/fork.c:2655 __do_compat_sys_ia32_clone+0x9e/0xd0 arch/x86/kernel/sys_ia32.c:254 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_write_lock_irqsave include/linux/rwlock_api_smp.h:186 [inline] _raw_write_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:318 snd_ctl_open sound/core/control.c:80 [inline] snd_ctl_open+0x3a1/0x5c0 sound/core/control.c:42 snd_open+0x21f/0x460 sound/core/sound.c:169 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x4a1/0x11f0 fs/open.c:848 do_open fs/namei.c:3520 [inline] path_openat+0x1c71/0x2910 fs/namei.c:3653 do_filp_open+0x1aa/0x400 fs/namei.c:3680 do_sys_openat2+0x16d/0x4c0 fs/open.c:1278 do_sys_open fs/open.c:1294 [inline] __do_compat_sys_openat fs/open.c:1354 [inline] __se_compat_sys_openat fs/open.c:1352 [inline] __ia32_compat_sys_openat+0x13f/0x1f0 fs/open.c:1352 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 snd_ctl_notify.part.0+0x36/0x560 sound/core/control.c:159 snd_ctl_notify sound/core/control.c:213 [inline] snd_ctl_notify_one+0x234/0x280 sound/core/control.c:208 __snd_ctl_add_replace+0x599/0x760 sound/core/control.c:412 snd_ctl_add_replace+0x76/0x130 sound/core/control.c:429 snd_card_dummy_new_mixer sound/drivers/dummy.c:884 [inline] snd_dummy_probe+0xbb9/0x10a0 sound/drivers/dummy.c:1079 platform_probe+0xfc/0x1f0 drivers/base/platform.c:1400 call_driver_probe drivers/base/dd.c:555 [inline] really_probe+0x23e/0xb90 drivers/base/dd.c:634 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:764 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:794 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:917 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:989 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487 device_add+0xbda/0x1ea0 drivers/base/core.c:3417 platform_device_add+0x363/0x820 drivers/base/platform.c:717 platform_device_register_full+0x3ed/0x550 drivers/base/platform.c:844 platform_device_register_resndata include/linux/platform_device.h:141 [inline] platform_device_register_simple include/linux/platform_device.h:170 [inline] alsa_card_dummy_init+0x1e0/0x309 sound/drivers/dummy.c:1157 do_one_initcall+0x103/0x650 init/main.c:1295 do_initcall_level init/main.c:1368 [inline] do_initcalls init/main.c:1384 [inline] do_basic_setup init/main.c:1403 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1610 kernel_init+0x1a/0x1d0 init/main.c:1499 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 } ... key at: [] __key.12+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 snd_ctl_notify.part.0+0x36/0x560 sound/core/control.c:159 snd_ctl_notify+0x8f/0xb0 sound/core/control.c:187 loopback_active_notify sound/drivers/aloop.c:372 [inline] loopback_trigger+0x4af/0x1b10 sound/drivers/aloop.c:426 snd_pcm_do_start sound/core/pcm_native.c:1429 [inline] snd_pcm_do_start+0xb1/0xf0 sound/core/pcm_native.c:1424 snd_pcm_action_single+0x75/0x130 sound/core/pcm_native.c:1281 snd_pcm_action+0x6e/0x90 sound/core/pcm_native.c:1364 __snd_pcm_lib_xfer+0x14d0/0x1e10 sound/core/pcm_lib.c:2308 snd_pcm_oss_write3+0x103/0x250 sound/core/oss/pcm_oss.c:1253 io_playback_transfer+0x27e/0x330 sound/core/oss/io.c:47 snd_pcm_plug_write_transfer+0x2cd/0x3f0 sound/core/oss/pcm_plugin.c:630 snd_pcm_oss_write2+0x245/0x3f0 sound/core/oss/pcm_oss.c:1385 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1451 [inline] snd_pcm_oss_write+0x759/0x9c0 sound/core/oss/pcm_oss.c:2811 vfs_write+0x269/0xac0 fs/read_write.c:589 ksys_write+0x127/0x250 fs/read_write.c:644 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326 fasync_remove_entry+0xb6/0x1e0 fs/fcntl.c:872 fasync_helper+0x9e/0xb0 fs/fcntl.c:975 sock_fasync+0x94/0x140 net/socket.c:1390 __fput+0x834/0x9d0 fs/file_table.c:314 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:995 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x136/0x470 fs/fcntl.c:1009 sock_wake_async+0xd2/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2466 [inline] sk_wake_async include/net/sock.h:2462 [inline] tcp_rcv_state_process+0x3ee9/0x4eb0 net/ipv4/tcp_input.c:6541 tcp_v6_do_rcv+0x3fc/0x13c0 net/ipv6/tcp_ipv6.c:1501 sk_backlog_rcv include/net/sock.h:1047 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2849 release_sock+0x54/0x1b0 net/core/sock.c:3404 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1449 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 __sys_sendto+0x21a/0x320 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2127 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 } ... key at: [] __key.0+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:995 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x136/0x470 fs/fcntl.c:1009 snd_ctl_notify.part.0+0x261/0x560 sound/core/control.c:184 snd_ctl_notify sound/core/control.c:213 [inline] snd_ctl_notify_one+0x234/0x280 sound/core/control.c:208 __snd_ctl_add_replace+0x599/0x760 sound/core/control.c:412 snd_ctl_elem_add+0x7dd/0x1220 sound/core/control.c:1587 snd_ctl_elem_add_compat+0x2bb/0x3c0 sound/core/control_compat.c:408 snd_ctl_ioctl_compat+0x140/0x9a0 sound/core/control_compat.c:460 __do_compat_sys_ioctl+0x1c7/0x290 fs/ioctl.c:968 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 -> (&f->f_owner.lock){...-}-{2:2} { IN-SOFTIRQ-R at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236 send_sigurg+0x1e/0xaf0 fs/fcntl.c:816 sk_send_sigurg+0x76/0x310 net/core/sock.c:3275 tcp_check_urg net/ipv4/tcp_input.c:5596 [inline] tcp_urg+0x38e/0xb40 net/ipv4/tcp_input.c:5637 tcp_rcv_established+0x81d/0x20e0 net/ipv4/tcp_input.c:5984 tcp_v6_do_rcv+0x810/0x13c0 net/ipv6/tcp_ipv6.c:1476 tcp_v6_rcv+0x2d9b/0x37f0 net/ipv6/tcp_ipv6.c:1735 ip6_protocol_deliver_rcu+0x2f9/0x1950 net/ipv6/ip6_input.c:436 ip6_input_finish+0x14c/0x2c0 net/ipv6/ip6_input.c:481 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ip6_input+0x9c/0xd0 net/ipv6/ip6_input.c:490 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] ipv6_rcv+0x27f/0x3b0 net/ipv6/ip6_input.c:306 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5478 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5592 process_backlog+0x3a0/0x7c0 net/core/dev.c:5920 __napi_poll+0xb3/0x6e0 net/core/dev.c:6486 napi_poll net/core/dev.c:6553 [inline] net_rx_action+0x9c1/0xd90 net/core/dev.c:6664 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571 run_ksoftirqd kernel/softirq.c:934 [inline] run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326 f_modown+0x2a/0x390 fs/fcntl.c:90 __tty_fasync drivers/tty/tty_io.c:2244 [inline] tty_fasync+0x295/0x390 drivers/tty/tty_io.c:2259 setfl fs/fcntl.c:73 [inline] do_fcntl+0x5ea/0x1040 fs/fcntl.c:339 do_compat_fcntl64+0x2c8/0x600 fs/fcntl.c:657 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x24/0x380 fs/fcntl.c:777 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1009 sock_wake_async+0xd2/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2466 [inline] sk_wake_async include/net/sock.h:2462 [inline] tcp_rcv_state_process+0x3ee9/0x4eb0 net/ipv4/tcp_input.c:6541 tcp_v6_do_rcv+0x3fc/0x13c0 net/ipv6/tcp_ipv6.c:1501 sk_backlog_rcv include/net/sock.h:1047 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2849 release_sock+0x54/0x1b0 net/core/sock.c:3404 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1449 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 __sys_sendto+0x21a/0x320 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2127 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 } ... key at: [] __key.5+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x24/0x380 fs/fcntl.c:777 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1009 sock_wake_async+0xd2/0x160 net/socket.c:1419 sk_wake_async include/net/sock.h:2466 [inline] sk_wake_async include/net/sock.h:2462 [inline] tcp_rcv_state_process+0x3ee9/0x4eb0 net/ipv4/tcp_input.c:6541 tcp_v6_do_rcv+0x3fc/0x13c0 net/ipv6/tcp_ipv6.c:1501 sk_backlog_rcv include/net/sock.h:1047 [inline] __release_sock+0x134/0x3b0 net/core/sock.c:2849 release_sock+0x54/0x1b0 net/core/sock.c:3404 tcp_sendmsg+0x36/0x40 net/ipv4/tcp.c:1449 inet6_sendmsg+0x99/0xe0 net/ipv6/af_inet6.c:652 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:734 __sys_sendto+0x21a/0x320 net/socket.c:2119 __do_sys_sendto net/socket.c:2131 [inline] __se_sys_sendto net/socket.c:2127 [inline] __ia32_sys_sendto+0xdb/0x1b0 net/socket.c:2127 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 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:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:326 copy_process+0x445e/0x7020 kernel/fork.c:2374 kernel_clone+0xe7/0xab0 kernel/fork.c:2655 user_mode_thread+0xad/0xe0 kernel/fork.c:2724 rest_init+0x23/0x270 init/main.c:691 arch_call_rest_init+0xf/0x14 init/main.c:882 start_kernel+0x46e/0x48f init/main.c:1137 secondary_startup_64_no_verify+0xce/0xdb INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 do_wait+0x284/0xce0 kernel/exit.c:1508 kernel_wait+0x9c/0x150 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2e9/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 send_sigio+0xab/0x380 fs/fcntl.c:791 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1009 lease_break_callback+0x1f/0x30 fs/locks.c:535 __break_lease+0x3d7/0x1420 fs/locks.c:1535 break_lease include/linux/fs.h:2503 [inline] break_lease include/linux/fs.h:2493 [inline] do_dentry_open+0x432/0x11f0 fs/open.c:839 do_open fs/namei.c:3520 [inline] path_openat+0x1c71/0x2910 fs/namei.c:3653 do_filp_open+0x1aa/0x400 fs/namei.c:3680 do_sys_openat2+0x16d/0x4c0 fs/open.c:1278 do_sys_open fs/open.c:1294 [inline] __do_sys_creat fs/open.c:1370 [inline] __se_sys_creat fs/open.c:1364 [inline] __ia32_sys_creat+0xc8/0x120 fs/open.c:1364 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 stack backtrace: CPU: 0 PID: 10036 Comm: syz-executor.3 Not tainted 5.19.0-rc3-syzkaller-00027-g78ca55889a54 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2609 [inline] check_irq_usage.cold+0x4c1/0x6b0 kernel/locking/lockdep.c:2848 check_prev_add kernel/locking/lockdep.c:3099 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3829 [inline] __lock_acquire+0x2ad6/0x5660 kernel/locking/lockdep.c:5053 lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 send_sigio+0xab/0x380 fs/fcntl.c:791 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x1f8/0x470 fs/fcntl.c:1009 lease_break_callback+0x1f/0x30 fs/locks.c:535 __break_lease+0x3d7/0x1420 fs/locks.c:1535 break_lease include/linux/fs.h:2503 [inline] break_lease include/linux/fs.h:2493 [inline] do_dentry_open+0x432/0x11f0 fs/open.c:839 do_open fs/namei.c:3520 [inline] path_openat+0x1c71/0x2910 fs/namei.c:3653 do_filp_open+0x1aa/0x400 fs/namei.c:3680 do_sys_openat2+0x16d/0x4c0 fs/open.c:1278 do_sys_open fs/open.c:1294 [inline] __do_sys_creat fs/open.c:1370 [inline] __se_sys_creat fs/open.c:1364 [inline] __ia32_sys_creat+0xc8/0x120 fs/open.c:1364 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+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x53/0x62 RIP: 0023:0xf7fa0549 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:00000000f7f9b5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000008 RAX: ffffffffffffffda RBX: 00000000200000c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 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