INFO: task syz-executor.3:10491 blocked for more than 140 seconds.
ieee802154 phy0 wpan0: encryption failed: -22
ieee802154 phy1 wpan1: encryption failed: -22
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D27416 10491   8180 0x80000004
Call Trace:
ALSA: mixer_oss: invalid OSS volume ''
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
ALSA: mixer_oss: invalid OSS volume 'PHNEIN'
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline]
 rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309
 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x44/0x80 kernel/locking/rwsem.c:26
 iterate_supers+0xdb/0x290 fs/super.c:631
 drop_caches_sysctl_handler+0xdb/0x110 fs/drop_caches.c:61
 proc_sys_call_handler.isra.0+0x1f3/0x3b0 fs/proc/proc_sysctl.c:597
 __vfs_write+0xf7/0x770 fs/read_write.c:485
 __kernel_write+0x109/0x370 fs/read_write.c:506
 write_pipe_buf+0x153/0x1f0 fs/splice.c:798
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x389/0x800 fs/splice.c:627
 splice_from_pipe fs/splice.c:662 [inline]
 default_file_splice_write+0xd8/0x180 fs/splice.c:810
 do_splice_from fs/splice.c:852 [inline]
 direct_splice_actor+0x115/0x160 fs/splice.c:1025
 splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980
 do_splice_direct+0x1a7/0x270 fs/splice.c:1068
 do_sendfile+0x550/0xc30 fs/read_write.c:1447
 __do_sys_sendfile64 fs/read_write.c:1502 [inline]
 __se_sys_sendfile64+0xc4/0x160 fs/read_write.c:1494
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7feac57590c9
Code: Bad RIP value.
RSP: 002b:00007feac3ccb168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007feac5878f80 RCX: 00007feac57590c9
RDX: 0000000020002080 RSI: 0000000000000005 RDI: 0000000000000006
RBP: 00007feac57b4ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000870 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffe266b10f R14: 00007feac3ccb300 R15: 0000000000022000

Showing all locks held in the system:
ALSA: mixer_oss: invalid OSS volume 'O$AIN'
netlink: 20 bytes leftover after parsing attributes in process `syz-executor.3'.
ALSA: mixer_oss: invalid OSS volume ''
ALSA: mixer_oss: invalid OSS volume 'PHNEIN'
ALSA: mixer_oss: invalid OSS volume 'O$AIN'
ntfs: (device nullb0): parse_options(): Unrecognized mount option }#+ÿ.
4 locks held by kworker/u4:3/169:
1 lock held by khungtaskd/1560:
 #0: 0000000007fe16d9 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7745:
 #0: 000000009134b903 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
1 lock held by syz-executor.0/4524:
 #0: 000000006eee959b (&type->s_umount_key#85/1){+.+.}, at: alloc_super fs/super.c:226 [inline]
 #0: 000000006eee959b (&type->s_umount_key#85/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519
2 locks held by syz-executor.3/10491:
 #0: 00000000ee481096 (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline]
 #0: 00000000ee481096 (sb_writers#4){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446
 #1: 000000006eee959b (&type->s_umount_key#86){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631
2 locks held by syz-executor.2/10897:
 #0: 00000000ee481096 (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline]
 #0: 00000000ee481096 (sb_writers#4){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446
 #1: 000000006eee959b (&type->s_umount_key#86){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1560 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: 169 Comm: kworker/u4:3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:101
Code: 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b 8b 90 60 13 00 00 <83> fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48
RSP: 0018:ffff8880b4d7f968 EFLAGS: 00000046
RAX: ffff8880b53ca200 RBX: 0000607f45c6b9f0 RCX: 0000000000000005
RDX: 0000000000000000 RSI: ffffffff83771e05 RDI: ffffffff88b3e120
RBP: ffffffff88b3e120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89f6d360
R13: ffffffff88b3e0e0 R14: ffffffff814a7850 R15: ffff8880b4d7fa58
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557c13aab160 CR3: 00000000b3c04000 CR4: 00000000003426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 check_preemption_disabled+0x15/0x280 lib/smp_processor_id.c:13
 perf_trace_lock+0xe2/0x4b0 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x4e8/0x8b0 kernel/locking/lockdep.c:3926
 rcu_lock_release include/linux/rcupdate.h:247 [inline]
 rcu_read_unlock include/linux/rcupdate.h:681 [inline]
 inet_twsk_purge+0x558/0x7c0 net/ipv4/inet_timewait_sock.c:298
 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:554
 process_one_work+0x864/0x1570 kernel/workqueue.c:2153
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415