bisecting fixing commit since 45ab9400e73f34103e73c18a73280c9aa1650e98 building syzkaller on 131df97d431404458e805009bda794abfb00f45f testing commit 45ab9400e73f34103e73c18a73280c9aa1650e98 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 144773ec735df131fc3c018d09e510088016410340f58b3ddd0f17d059d12b8d all runs: crashed: possible deadlock in snd_pcm_period_elapsed testing current HEAD 0840a7914caa14315a3191178a9f72c742477860 testing commit 0840a7914caa14315a3191178a9f72c742477860 compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f22d679a30bdfa523451134c38c880763bc6a593f23e9ea8285782f718c68ed6 all runs: crashed: possible deadlock in snd_pcm_period_elapsed revisions tested: 2, total time: 19m28.222895325s (build: 12m35.025280027s, test: 6m22.096895645s) the crash still happens on HEAD commit msg: Merge tag 'char-misc-5.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc crash: possible deadlock in snd_pcm_period_elapsed ======================================================== WARNING: possible irq lock inversion dependency detected 5.19.0-rc3-syzkaller #0 Not tainted -------------------------------------------------------- swapper/0/0 just changed the state of lock: ffff88814a516110 (&group->lock){..-.}-{2:2}, at: snd_pcm_period_elapsed+0x10/0x30 sound/core/pcm_lib.c:1848 but this lock took another, SOFTIRQ-READ-unsafe lock in the past: (tasklist_lock){.+.+}-{2:2} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &group->lock --> &timer->lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&group->lock); lock(&timer->lock); lock(&group->lock); *** DEADLOCK *** no locks held by swapper/0/0. the shortest dependencies between 2nd lock and 1st 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+0x231/0xaa0 kernel/exit.c:1508 kernel_wait+0x97/0x130 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xbb/0x140 kernel/umh.c:166 process_one_work+0x841/0x13a0 kernel/workqueue.c:2289 worker_thread+0x598/0xec0 kernel/workqueue.c:2436 kthread+0x299/0x340 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+0x231/0xaa0 kernel/exit.c:1508 kernel_wait+0x97/0x130 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xbb/0x140 kernel/umh.c:166 process_one_work+0x841/0x13a0 kernel/workqueue.c:2289 worker_thread+0x598/0xec0 kernel/workqueue.c:2436 kthread+0x299/0x340 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+0x3b86/0x6680 kernel/fork.c:2374 kernel_clone+0xb8/0x7f0 kernel/fork.c:2655 user_mode_thread+0x9b/0xd0 kernel/fork.c:2724 rest_init+0x1e/0x200 init/main.c:691 arch_call_rest_init+0xa/0xb init/main.c:882 start_kernel+0x332/0x350 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+0x231/0xaa0 kernel/exit.c:1508 kernel_wait+0x97/0x130 kernel/exit.c:1698 call_usermodehelper_exec_sync kernel/umh.c:139 [inline] call_usermodehelper_exec_work+0xbb/0x140 kernel/umh.c:166 process_one_work+0x841/0x13a0 kernel/workqueue.c:2289 worker_thread+0x598/0xec0 kernel/workqueue.c:2436 kthread+0x299/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228 send_sigio+0x8c/0x2b0 fs/fcntl.c:791 dnotify_handle_event+0x10a/0x210 fs/notify/dnotify/dnotify.c:115 fsnotify_handle_event fs/notify/fsnotify.c:316 [inline] send_to_group fs/notify/fsnotify.c:362 [inline] fsnotify+0xac8/0x10a0 fs/notify/fsnotify.c:567 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:3446 [inline] path_openat+0xc78/0x2360 fs/namei.c:3650 do_filp_open+0x199/0x3d0 fs/namei.c:3680 do_sys_openat2+0x11e/0x3f0 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] __x64_sys_creat+0xc3/0x110 fs/open.c:1364 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 -> (&f->f_owner.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 f_modown+0x23/0x320 fs/fcntl.c:90 __f_setown fs/fcntl.c:109 [inline] f_setown+0x86/0x160 fs/fcntl.c:137 do_fcntl+0x4c9/0xc90 fs/fcntl.c:376 __do_sys_fcntl fs/fcntl.c:453 [inline] __se_sys_fcntl fs/fcntl.c:438 [inline] __x64_sys_fcntl+0x114/0x160 fs/fcntl.c:438 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 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+0x1c/0x2b0 fs/fcntl.c:777 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x176/0x320 fs/fcntl.c:1009 snd_timer_user_ccallback+0x24d/0x300 sound/core/timer.c:1386 snd_timer_notify1+0x115/0x330 sound/core/timer.c:516 snd_timer_start1+0x3dd/0x6f0 sound/core/timer.c:578 snd_timer_start sound/core/timer.c:696 [inline] snd_timer_start sound/core/timer.c:689 [inline] snd_timer_user_start.isra.0+0x16d/0x1e0 sound/core/timer.c:1984 __snd_timer_user_ioctl.isra.0+0xa1b/0x1d90 sound/core/timer.c:2107 snd_timer_user_ioctl+0x72/0xa0 sound/core/timer.c:2128 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+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] __key.3+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+0x1c/0x2b0 fs/fcntl.c:777 kill_fasync_rcu fs/fcntl.c:1002 [inline] kill_fasync fs/fcntl.c:1016 [inline] kill_fasync+0x176/0x320 fs/fcntl.c:1009 snd_timer_user_ccallback+0x24d/0x300 sound/core/timer.c:1386 snd_timer_notify1+0x115/0x330 sound/core/timer.c:516 snd_timer_start1+0x3dd/0x6f0 sound/core/timer.c:578 snd_timer_start sound/core/timer.c:696 [inline] snd_timer_start sound/core/timer.c:689 [inline] snd_timer_user_start.isra.0+0x16d/0x1e0 sound/core/timer.c:1984 __snd_timer_user_ioctl.isra.0+0xa1b/0x1d90 sound/core/timer.c:2107 snd_timer_user_ioctl+0x72/0xa0 sound/core/timer.c:2128 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+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 -> (&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+0xa1/0x1d0 fs/fcntl.c:872 __fput+0x664/0x8c0 fs/file_table.c:314 task_work_run+0xc0/0x160 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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 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+0xe5/0x320 fs/fcntl.c:1009 snd_timer_user_ccallback+0x24d/0x300 sound/core/timer.c:1386 snd_timer_notify1+0x115/0x330 sound/core/timer.c:516 snd_timer_start1+0x3dd/0x6f0 sound/core/timer.c:578 snd_timer_start sound/core/timer.c:696 [inline] snd_timer_start sound/core/timer.c:689 [inline] snd_timer_user_start.isra.0+0x16d/0x1e0 sound/core/timer.c:1984 __snd_timer_user_ioctl.isra.0+0xa1b/0x1d90 sound/core/timer.c:2107 snd_timer_user_ioctl+0x72/0xa0 sound/core/timer.c:2128 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+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... 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+0xe5/0x320 fs/fcntl.c:1009 snd_timer_user_ccallback+0x24d/0x300 sound/core/timer.c:1386 snd_timer_notify1+0x115/0x330 sound/core/timer.c:516 snd_timer_start1+0x3dd/0x6f0 sound/core/timer.c:578 snd_timer_start sound/core/timer.c:696 [inline] snd_timer_start sound/core/timer.c:689 [inline] snd_timer_user_start.isra.0+0x16d/0x1e0 sound/core/timer.c:1984 __snd_timer_user_ioctl.isra.0+0xa1b/0x1d90 sound/core/timer.c:2107 snd_timer_user_ioctl+0x72/0xa0 sound/core/timer.c:2128 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+0x11f/0x190 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 -> (&timer->lock){....}-{2:2} { INITIAL USE 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_timer_notify sound/core/timer.c:1086 [inline] snd_timer_notify+0xcc/0x320 sound/core/timer.c:1073 snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline] snd_pcm_post_stop+0x173/0x1d0 sound/core/pcm_native.c:1512 snd_pcm_action_single+0xbe/0xf0 sound/core/pcm_native.c:1283 snd_pcm_stop sound/core/pcm_native.c:1535 [inline] snd_pcm_drop+0x165/0x290 sound/core/pcm_native.c:2218 snd_pcm_oss_sync+0x1ed/0x730 sound/core/oss/pcm_oss.c:1746 snd_pcm_oss_release+0x21f/0x2b0 sound/core/oss/pcm_oss.c:2590 __fput+0x1f5/0x8c0 fs/file_table.c:317 task_work_run+0xc0/0x160 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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] __key.6+0x0/0x40 ... acquired at: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162 snd_timer_notify sound/core/timer.c:1086 [inline] snd_timer_notify+0xcc/0x320 sound/core/timer.c:1073 snd_pcm_timer_notify sound/core/pcm_native.c:608 [inline] snd_pcm_post_stop+0x173/0x1d0 sound/core/pcm_native.c:1512 snd_pcm_action_single+0xbe/0xf0 sound/core/pcm_native.c:1283 snd_pcm_stop sound/core/pcm_native.c:1535 [inline] snd_pcm_drop+0x165/0x290 sound/core/pcm_native.c:2218 snd_pcm_oss_sync+0x1ed/0x730 sound/core/oss/pcm_oss.c:1746 snd_pcm_oss_release+0x21f/0x2b0 sound/core/oss/pcm_oss.c:2590 __fput+0x1f5/0x8c0 fs/file_table.c:317 task_work_run+0xc0/0x160 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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 -> (&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_period_elapsed+0x10/0x30 sound/core/pcm_lib.c:1848 dummy_hrtimer_callback+0x7a/0x170 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x340 kernel/time/hrtimer.c:1766 __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 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] acpi_idle_do_entry+0x156/0x1b0 drivers/acpi/processor_idle.c:554 acpi_idle_enter+0x2c3/0x4c0 drivers/acpi/processor_idle.c:691 cpuidle_enter_state+0x152/0xb40 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x45/0xa0 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x144/0x200 init/main.c:726 arch_call_rest_init+0xa/0xb init/main.c:882 start_kernel+0x332/0x350 init/main.c:1137 secondary_startup_64_no_verify+0xce/0xdb 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_hw_params+0x11c/0x1800 sound/core/pcm_native.c:726 snd_pcm_oss_change_params_locked+0x1283/0x3050 sound/core/oss/pcm_oss.c:976 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1116 [inline] snd_pcm_oss_make_ready+0x99/0x140 sound/core/oss/pcm_oss.c:1175 snd_pcm_oss_sync+0x1aa/0x730 sound/core/oss/pcm_oss.c:1742 snd_pcm_oss_release+0x21f/0x2b0 sound/core/oss/pcm_oss.c:2590 __fput+0x1f5/0x8c0 fs/file_table.c:317 task_work_run+0xc0/0x160 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_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 } ... key at: [] __key.5+0x0/0x40 ... acquired at: mark_lock kernel/locking/lockdep.c:4596 [inline] mark_usage kernel/locking/lockdep.c:4527 [inline] __lock_acquire+0x11de/0x55d0 kernel/locking/lockdep.c:5007 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_period_elapsed+0x10/0x30 sound/core/pcm_lib.c:1848 dummy_hrtimer_callback+0x7a/0x170 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x340 kernel/time/hrtimer.c:1766 __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 native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline] acpi_idle_do_entry+0x156/0x1b0 drivers/acpi/processor_idle.c:554 acpi_idle_enter+0x2c3/0x4c0 drivers/acpi/processor_idle.c:691 cpuidle_enter_state+0x152/0xb40 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x45/0xa0 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x144/0x200 init/main.c:726 arch_call_rest_init+0xa/0xb init/main.c:882 start_kernel+0x332/0x350 init/main.c:1137 secondary_startup_64_no_verify+0xce/0xdb stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-syzkaller #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+0x57/0x7d lib/dump_stack.c:106 print_irq_inversion_bug kernel/locking/lockdep.c:4634 [inline] check_usage_forwards kernel/locking/lockdep.c:4071 [inline] mark_lock_irq kernel/locking/lockdep.c:4203 [inline] mark_lock.part.0.cold+0x82/0xd8 kernel/locking/lockdep.c:4632 mark_lock kernel/locking/lockdep.c:4596 [inline] mark_usage kernel/locking/lockdep.c:4527 [inline] __lock_acquire+0x11de/0x55d0 kernel/locking/lockdep.c:5007 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_period_elapsed+0x10/0x30 sound/core/pcm_lib.c:1848 dummy_hrtimer_callback+0x7a/0x170 sound/drivers/dummy.c:377 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x4d7/0xb00 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x340 kernel/time/hrtimer.c:1766 __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 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline] RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] RIP: 0010:acpi_idle_do_entry+0x156/0x1b0 drivers/acpi/processor_idle.c:554 Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 61 48 8b 45 00 a8 08 75 c0 e8 35 6a d2 f8 66 90 0f 00 2d fc a5 cc 00 fb f4 <9c> 58 fa f6 c4 02 74 a8 5d e9 0c 69 d2 f8 e8 17 d9 0e f9 e9 c1 fe RSP: 0018:ffffffff8ac07d60 EFLAGS: 00000246 RAX: 00000000000324f3 RBX: ffff88801552f865 RCX: 1ffffffff198c929 RDX: 0000000000000000 RSI: ffffffff890bb900 RDI: ffffffff8962f5c0 RBP: ffffffff8acbb400 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1597680 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88801552f864 R14: ffffffff8b94a960 R15: ffff888146b71004 acpi_idle_enter+0x2c3/0x4c0 drivers/acpi/processor_idle.c:691 cpuidle_enter_state+0x152/0xb40 drivers/cpuidle/cpuidle.c:237 cpuidle_enter+0x45/0xa0 drivers/cpuidle/cpuidle.c:351 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x3e8/0x590 kernel/sched/idle.c:303 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400 rest_init+0x144/0x200 init/main.c:726 arch_call_rest_init+0xa/0xb init/main.c:882 start_kernel+0x332/0x350 init/main.c:1137 secondary_startup_64_no_verify+0xce/0xdb ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 00 add %al,(%rax) 4: 00 fc add %bh,%ah 6: ff (bad) 7: df 48 c1 fisttps -0x3f(%rax) a: ea (bad) b: 03 80 3c 02 00 75 add 0x7500023c(%rax),%eax 11: 61 (bad) 12: 48 8b 45 00 mov 0x0(%rbp),%rax 16: a8 08 test $0x8,%al 18: 75 c0 jne 0xffffffda 1a: e8 35 6a d2 f8 callq 0xf8d26a54 1f: 66 90 xchg %ax,%ax 21: 0f 00 2d fc a5 cc 00 verw 0xcca5fc(%rip) # 0xcca624 28: fb sti 29: f4 hlt * 2a: 9c pushfq <-- trapping instruction 2b: 58 pop %rax 2c: fa cli 2d: f6 c4 02 test $0x2,%ah 30: 74 a8 je 0xffffffda 32: 5d pop %rbp 33: e9 0c 69 d2 f8 jmpq 0xf8d26944 38: e8 17 d9 0e f9 callq 0xf90ed954 3d: e9 .byte 0xe9 3e: c1 .byte 0xc1 3f: fe .byte 0xfe