INFO: task syz-executor.0:17745 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc4-syzkaller-00012-gce36c8b14987 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26624 pid:17745 ppid:5091   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0xee1/0x5a10 kernel/sched/core.c:6695
 schedule+0xe7/0x1b0 kernel/sched/core.c:6771
 __lock_sock+0x140/0x260 net/core/sock.c:2959
 lock_sock_nested+0xda/0xf0 net/core/sock.c:3510
 lock_sock include/net/sock.h:1722 [inline]
 tcp_recvmsg+0x113/0x670 net/ipv4/tcp.c:2565
 inet_recvmsg+0x114/0x630 net/ipv4/af_inet.c:872
 sock_recvmsg_nosec net/socket.c:1027 [inline]
 ____sys_recvmsg+0x4ab/0x5c0 net/socket.c:2758
 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2802
 do_recvmmsg+0x2af/0x740 net/socket.c:2896
 __sys_recvmmsg net/socket.c:2975 [inline]
 __do_sys_recvmmsg net/socket.c:2998 [inline]
 __se_sys_recvmmsg net/socket.c:2991 [inline]
 __x64_sys_recvmmsg+0x235/0x290 net/socket.c:2991
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa55267cae9
RSP: 002b:00007fa5534a70c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fa55279bf80 RCX: 00007fa55267cae9
RDX: 000000000000000a RSI: 0000000020001840 RDI: 0000000000000005
RBP: 00007fa5526c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa55279bf80 R15: 00007fa5528bfa48
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
 #0: ffffffff8cbab2a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4801:
 #0: ffff88814a6fa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc5/0x1480 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.0/17745:
 #0: ffff88807daf3e70 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1722 [inline]
 #0: ffff88807daf3e70 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_recvmsg+0x113/0x670 net/ipv4/tcp.c:2565
2 locks held by syz-executor.0/17761:
2 locks held by kworker/u4:4/19394:

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc4-syzkaller-00012-gce36c8b14987 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x33c/0x440 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5100 Comm: syz-executor.2 Not tainted 6.6.0-rc4-syzkaller-00012-gce36c8b14987 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:mark_lock+0x19/0x1950 kernel/locking/lockdep.c:4638
Code: bd 7c 75 00 e9 ae fe ff ff 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 89 d5 48 ba 00 00 00 00 00 fc ff df 41 54 <53> 48 83 e4 f0 48 81 ec 40 01 00 00 48 8d 44 24 40 48 89 7c 24 30
RSP: 0018:ffffc9000403f830 EFLAGS: 00000002
RAX: 000000000000000c RBX: 0000000000000000 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffff8880255de430 RDI: ffff8880255dd940
RBP: ffffc9000403f850 R08: 0000000000000000 R09: fffffbfff233e1d0
R10: ffffffff919f0e87 R11: 0000000000000000 R12: ffff8880255de452
R13: 0000000000000008 R14: 0000000000000000 R15: 0000000000000003
FS:  0000555556cc3480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202f5000 CR3: 0000000028bbe000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 mark_usage kernel/locking/lockdep.c:4598 [inline]
 __lock_acquire+0x975/0x5de0 kernel/locking/lockdep.c:5090
 lock_acquire kernel/locking/lockdep.c:5753 [inline]
 lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5718
 debug_objects_fill_pool lib/debugobjects.c:614 [inline]
 debug_object_activate+0x144/0x490 lib/debugobjects.c:713
 debug_hrtimer_activate kernel/time/hrtimer.c:422 [inline]
 debug_activate kernel/time/hrtimer.c:477 [inline]
 enqueue_hrtimer+0x23/0x310 kernel/time/hrtimer.c:1087
 __hrtimer_start_range_ns kernel/time/hrtimer.c:1261 [inline]
 hrtimer_start_range_ns+0x7c0/0xdb0 kernel/time/hrtimer.c:1301
 hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
 hrtimer_sleeper_start_expires kernel/time/hrtimer.c:1968 [inline]
 do_nanosleep+0x1f5/0x500 kernel/time/hrtimer.c:2044
 hrtimer_nanosleep+0x1ae/0x440 kernel/time/hrtimer.c:2100
 common_nsleep+0xa1/0xc0 kernel/time/posix-timers.c:1350
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
 __x64_sys_clock_nanosleep+0x344/0x490 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f70cc6a7ef5
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 b9 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f ba ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007f70cc8bfcf0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000008cb RCX: 00007f70cc6a7ef5
RDX: 00007f70cc8bfd30 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f70cc8bfdbc R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000003d
R13: 00000000000c00a2 R14: 00000000000bffca R15: 0000000000000011
 </TASK>