INFO: task syz-executor.4:16721 blocked for more than 143 seconds.
      Not tainted 6.9.0-syzkaller-12171-gccf23c916ca3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:27424 pid:16721 tgid:16713 ppid:13748  flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 ppp_create_interface drivers/net/ppp/ppp_generic.c:3331 [inline]
 ppp_unattached_ioctl drivers/net/ppp/ppp_generic.c:1045 [inline]
 ppp_ioctl+0x78b/0x1cd0 drivers/net/ppp/ppp_generic.c:718
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f54ebe7cee9
RSP: 002b:00007f54ecb270c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f54ebfb4070 RCX: 00007f54ebe7cee9
RDX: 0000000020000040 RSI: 00000000c004743e RDI: 000000000000000a
RBP: 00007f54ebec947f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f54ebfb4070 R15: 00007ffc13c61f18
 </TASK>
INFO: task syz-executor.4:16726 blocked for more than 143 seconds.
      Not tainted 6.9.0-syzkaller-12171-gccf23c916ca3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:27632 pid:16726 tgid:16713 ppid:13748  flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745