ALSA: mixer_oss: invalid OSS volume '0f3579ad' ALSA: mixer_oss: invalid OSS volume '12dba935' ALSA: mixer_oss: invalid OSS volume '1366a73b' ALSA: mixer_oss: invalid OSS volume '16919022' ALSA: mixer_oss: invalid OSS volume '1aa22aea' INFO: task segctord:24810 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 ALSA: mixer_oss: invalid OSS volume '1f2edb6c' "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ALSA: mixer_oss: invalid OSS volume '1f7f7884' ALSA: mixer_oss: invalid OSS volume '214b9156' segctord D30088 24810 2 0x80000000 ALSA: mixer_oss: invalid OSS volume '21ad5c77' Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 ALSA: mixer_oss: invalid OSS volume '2226202d' ALSA: mixer_oss: invalid OSS volume '23b36ac2' ALSA: mixer_oss: invalid OSS volume '23e6ed9b' schedule+0x8d/0x1b0 kernel/sched/core.c:3561 ALSA: mixer_oss: invalid OSS volume '2975a4d4' __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 ALSA: mixer_oss: invalid OSS volume '2afff707' ALSA: mixer_oss: invalid OSS volume '2d97e273' ALSA: mixer_oss: invalid OSS volume '2e2b830d' ALSA: mixer_oss: invalid OSS volume '2f628519' call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 ALSA: mixer_oss: invalid OSS volume '35810c8e' __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 ALSA: mixer_oss: invalid OSS volume '37f748ce' ALSA: mixer_oss: invalid OSS volume '38139eb9' nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 ALSA: mixer_oss: invalid OSS volume '3cba5e1b' nilfs_segctor_thread_construct fs/nilfs2/segment.c:2479 [inline] nilfs_segctor_thread+0x3c0/0xf50 fs/nilfs2/segment.c:2563 ALSA: mixer_oss: invalid OSS volume '3cc6194d' ALSA: mixer_oss: invalid OSS volume '3da8c713' ALSA: mixer_oss: invalid OSS volume '' kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 INFO: task segctord:24882 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. segctord D29872 24882 2 0x80000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 ALSA: mixer_oss: invalid OSS volume '' ALSA: mixer_oss: invalid OSS volume '04872019' ALSA: mixer_oss: invalid OSS volume '09229983' schedule+0x8d/0x1b0 kernel/sched/core.c:3561 ALSA: mixer_oss: invalid OSS volume '098b4434' __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 ALSA: mixer_oss: invalid OSS volume '0a9c9300' ALSA: mixer_oss: invalid OSS volume '0f3579ad' call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 ALSA: mixer_oss: invalid OSS volume '12dba935' __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 ALSA: mixer_oss: invalid OSS volume '1366a73b' ALSA: mixer_oss: invalid OSS volume '16919022' nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 ALSA: mixer_oss: invalid OSS volume '1aa22aea' nilfs_segctor_thread_construct fs/nilfs2/segment.c:2479 [inline] nilfs_segctor_thread+0x3c0/0xf50 fs/nilfs2/segment.c:2563 ALSA: mixer_oss: invalid OSS volume '1f2edb6c' ALSA: mixer_oss: invalid OSS volume '1f7f7884' ALSA: mixer_oss: invalid OSS volume '214b9156' ALSA: mixer_oss: invalid OSS volume '21ad5c77' ALSA: mixer_oss: invalid OSS volume '2226202d' ALSA: mixer_oss: invalid OSS volume '23b36ac2' ALSA: mixer_oss: invalid OSS volume '23e6ed9b' ALSA: mixer_oss: invalid OSS volume '2975a4d4' ALSA: mixer_oss: invalid OSS volume '2afff707' ALSA: mixer_oss: invalid OSS volume '2d97e273' ALSA: mixer_oss: invalid OSS volume '2e2b830d' ALSA: mixer_oss: invalid OSS volume '2f628519' ALSA: mixer_oss: invalid OSS volume '35810c8e' kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 1 lock held by khungtaskd/1565: #0: 0000000076a37141 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7799: #0: 000000000013f267 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 4 locks held by syz-executor.3/24804: 1 lock held by segctord/24810: #0: 00000000dab7a239 (&nilfs->ns_segctor_sem){++++}, at: nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 6 locks held by syz-executor.5/24883: 1 lock held by segctord/24882: #0: 00000000eccccbfa (&nilfs->ns_segctor_sem){++++}, at: nilfs_transaction_lock+0x1fb/0x8b0 fs/nilfs2/segment.c:362 2 locks held by kworker/u4:0/6186: 2 locks held by kworker/1:2/10135: 4 locks held by kworker/u4:3/9135: #0: 00000000c733e29a ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000c53b3fc7 (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 00000000db1dfad6 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521 #3: 0000000013a88691 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #3: 0000000013a88691 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 3 locks held by syz-executor.4/11508: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1565 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 11508 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:__hrtimer_get_next_event kernel/time/hrtimer.c:566 [inline] RIP: 0010:hrtimer_update_next_event kernel/time/hrtimer.c:594 [inline] RIP: 0010:hrtimer_interrupt+0x656/0x9e0 kernel/time/hrtimer.c:1588 Code: e8 df 3c 0e 00 84 db 0f 84 90 cc 9f 06 48 83 ec 80 5b 5d 41 5c 41 5d 41 5e 41 5f e9 94 3b 0e 00 e8 8f 3b 0e 00 48 8b 4c 24 28 <48> 89 c8 48 c1 e8 03 0f b6 14 18 48 89 c8 83 e0 07 83 c0 03 38 d0 RSP: 0018:ffff8880ba107570 EFLAGS: 00000006 RAX: ffff88809cffa340 RBX: dffffc0000000000 RCX: ffff8880ba124cfc RDX: 0000000000010100 RSI: ffffffff815449e1 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: ffffffff8c66505b R12: 0000000000000086 R13: 0000000000000001 R14: ffff8880ba124cc0 R15: 7fffffffffffffff FS: 00007f425b10e700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f53f9eda1b8 CR3: 000000004f0de000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:deref_stack_reg+0x17e/0x1d0 arch/x86/kernel/unwind_orc.c:336 Code: 00 00 48 ba 00 00 00 00 00 fc ff df 48 c7 04 13 00 00 00 00 48 8b 4c 24 60 65 48 2b 0c 25 28 00 00 00 75 47 48 83 c4 68 5b 5d <41> 5c 41 5d 41 5e c3 e8 26 e1 6e 00 e9 ec fe ff ff e8 ac e1 6e 00 RSP: 0018:ffff8880ba107710 EFLAGS: 00000296 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 1ffff11017420eef RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff8880ba1076c0 RDI: ffff8880502d7a18 RBP: 0000000000000001 R08: ffffffff8b932cf6 R09: ffffffff8b932cf2 R10: ffff8880ba1078bf R11: 0000000000074071 R12: ffff8880ba107860 R13: ffff8880ba1078a8 R14: ffff8880502d0000 R15: ffffffff8b932cf2 unwind_next_frame+0x9fc/0x1400 arch/x86/kernel/unwind_orc.c:502 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 kmem_cache_alloc_node+0x146/0x3b0 mm/slab.c:3649 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 __netdev_alloc_skb+0x76/0x460 net/core/skbuff.c:407 netdev_alloc_skb include/linux/skbuff.h:2680 [inline] dev_alloc_skb include/linux/skbuff.h:2693 [inline] __ieee80211_beacon_get+0xc7d/0x1a30 net/mac80211/tx.c:4352 ieee80211_beacon_get_tim+0x88/0x890 net/mac80211/tx.c:4463 ieee80211_beacon_get include/net/mac80211.h:4484 [inline] mac80211_hwsim_beacon_tx+0xff/0x680 drivers/net/wireless/mac80211_hwsim.c:1577 __iterate_interfaces+0x2e1/0x4a0 net/mac80211/util.c:614 ieee80211_iterate_active_interfaces_atomic+0x8d/0x170 net/mac80211/util.c:650 mac80211_hwsim_beacon+0xc9/0x190 drivers/net/wireless/mac80211_hwsim.c:1615 __tasklet_hrtimer_trampoline+0x29/0xa0 kernel/softirq.c:601 tasklet_action_common.constprop.0+0x265/0x360 kernel/softirq.c:522 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:console_unlock+0xe7b/0x1110 kernel/printk/printk.c:2468 Code: ff df 48 c1 e8 03 80 3c 08 00 0f 85 66 02 00 00 48 83 3d cf c3 a3 08 00 0f 84 9e 00 00 00 e8 ac c6 14 00 48 8b 7c 24 30 57 9d <0f> 1f 44 00 00 e9 9b fc ff ff e8 96 c6 14 00 0f 0b e8 8f c6 14 00 RSP: 0018:ffff8880502d7938 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc90008c1c000 RDX: 0000000000040000 RSI: ffffffff814dbec4 RDI: 0000000000000246 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8446efa0 R13: 000000000000003e R14: 0000000000000000 R15: ffffffff8a6dd090 vprintk_emit+0x2d1/0x740 kernel/printk/printk.c:1965 vprintk_func+0x79/0x180 kernel/printk/printk_safe.c:405 printk+0xba/0xed kernel/printk/printk.c:2040 snd_mixer_oss_proc_write.cold+0x14/0x31 sound/core/oss/mixer_oss.c:1198 snd_info_text_entry_release+0xfa/0x260 sound/core/info.c:425 close_pdeo.part.0+0xda/0x2f0 fs/proc/inode.c:176 close_pdeo fs/proc/inode.c:401 [inline] proc_reg_release+0x21e/0x270 fs/proc/inode.c:395 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f425cb9b639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f425b10e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000124 RAX: 000000000000000e RBX: 00007f425ccbbf80 RCX: 00007f425cb9b639 RDX: 0000000000000000 RSI: 000000000000000e RDI: 000000000000000a RBP: 00007f425cbf6ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8066edff R14: 00007f425b10e300 R15: 0000000000022000