INFO: task syz-executor.4:19330 blocked for more than 144 seconds.
      Not tainted 6.7.0-next-20240119-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:26112 pid:19330 tgid:19329 ppid:16882  flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe7/0x280 kernel/sched/core.c:6817
 __lock_sock+0x13f/0x270 net/core/sock.c:2948
 lock_sock_nested+0xda/0xf0 net/core/sock.c:3528
 lock_sock include/net/sock.h:1691 [inline]
 sk_wait_data+0x256/0x520 net/core/sock.c:3020
 tcp_recvmsg_locked+0x7f3/0x24a0 net/ipv4/tcp.c:2447
 tcp_recvmsg+0x12e/0x680 net/ipv4/tcp.c:2566
 inet_recvmsg+0x12b/0x6b0 net/ipv4/af_inet.c:879
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg+0x1b2/0x250 net/socket.c:1068
 ____sys_recvmsg+0x21f/0x6b0 net/socket.c:2803
 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845
 do_recvmmsg+0x2af/0x750 net/socket.c:2939
 __sys_recvmmsg net/socket.c:3018 [inline]
 __do_sys_recvmmsg net/socket.c:3041 [inline]
 __se_sys_recvmmsg net/socket.c:3034 [inline]
 __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f852e47cda9
RSP: 002b:00007f852f2800c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f852e5abf80 RCX: 00007f852e47cda9
RDX: 0000000000000001 RSI: 0000000020001840 RDI: 0000000000000005
RBP: 00007f852e4c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f852e5abf80 R15: 00007ffe10203348
 </TASK>
INFO: task syz-executor.4:19336 blocked for more than 149 seconds.
      Not tainted 6.7.0-next-20240119-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:26832 pid:19336 tgid:19329 ppid:16882  flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe7/0x280 kernel/sched/core.c:6817
 __lock_sock+0x13f/0x270 net/core/sock.c:2948
 lock_sock_nested+0xda/0xf0 net/core/sock.c:3528
 lock_sock include/net/sock.h:1691 [inline]
 inet_stream_connect+0x43/0xa0 net/ipv4/af_inet.c:745
 __sys_connect_file+0x15f/0x1a0 net/socket.c:2048
 __sys_connect+0x149/0x170 net/socket.c:2065
 __do_sys_connect net/socket.c:2075 [inline]
 __se_sys_connect net/socket.c:2072 [inline]
 __x64_sys_connect+0x72/0xb0 net/socket.c:2072
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f852e47cda9
RSP: 002b:00007f852f23e0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f852e5ac120 RCX: 00007f852e47cda9
RDX: 0000000000000010 RSI: 0000000020000880 RDI: 0000000000000005
RBP: 00007f852e4c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f852e5ac120 R15: 00007ffe10203348
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8d5aec20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/0:2/781:
2 locks held by getty/4817:
 #0: ffff88802bedd0a0 (&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+0xfc8/0x1490 drivers/tty/n_tty.c:2201
2 locks held by kworker/0:6/5139:
 #0: ffff888014c96938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7ba/0x16e0 kernel/workqueue.c:2608
 #1: ffffc900048cfd80 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x824/0x16e0 kernel/workqueue.c:2609
3 locks held by kworker/u4:15/7563:
 #0: ffff8880162ecd38 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ba/0x16e0 kernel/workqueue.c:2608
 #1: ffffc900038b7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x824/0x16e0 kernel/workqueue.c:2609
 #2: ffffffff8d5ba340 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4032
3 locks held by kworker/0:4/13728:
 #0: ffff888014c94d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7ba/0x16e0 kernel/workqueue.c:2608
 #1: ffffc90003a7fd80 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work+0x824/0x16e0 kernel/workqueue.c:2609
 #2: ffffffff8d5ba340 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4032
1 lock held by syz-executor.2/16402:
 #0: ffffffff8d5ba478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
 #0: ffffffff8d5ba478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x800 kernel/rcu/tree_exp.h:996
1 lock held by syz-executor.4/19330:
 #0: ffff8880276c3230 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline]
 #0: ffff8880276c3230 (sk_lock-AF_INET){+.+.}-{0:0}, at: sk_wait_data+0x256/0x520 net/core/sock.c:3020
1 lock held by syz-executor.4/19334:
1 lock held by syz-executor.4/19336:
 #0: ffff8880276c3230 (sk_lock-AF_INET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline]
 #0: ffff8880276c3230 (sk_lock-AF_INET){+.+.}-{0:0}, at: inet_stream_connect+0x43/0xa0 net/ipv4/af_inet.c:745
1 lock held by syz-executor.0/20145:
2 locks held by syz-executor.5/20154:
 #0: ffffffff8d6200a8 (tracepoints_mutex){+.+.}-{3:3}, at: tracepoint_probe_unregister+0x9c/0xd30 kernel/tracepoint.c:548
 #1: ffffffff8d5ba478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
 #1: ffffffff8d5ba478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x6b5/0x800 kernel/rcu/tree_exp.h:996

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

NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.7.0-next-20240119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/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+0xf86/0x1210 kernel/hung_task.c:379
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 20145 Comm: syz-executor.0 Not tainted 6.7.0-next-20240119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:sock_recvmsg_nosec net/socket.c:1046 [inline]
RIP: 0010:____sys_recvmsg+0x5c2/0x6b0 net/socket.c:2801
Code: 00 00 80 75 37 89 75 1d e8 db 67 fb f8 48 89 da 44 89 f9 48 89 ee 4c 89 e7 e8 ca ba a6 00 89 c3 e9 0c ff ff ff e8 be 67 fb f8 <49> 8b 4c 24 20 48 b8 00 00 00 00 00 fc ff df 48 8d b9 90 00 00 00
RSP: 0018:ffffc9000527f9e0 EFLAGS: 00000246
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000d0d5000
RDX: 0000000000040000 RSI: ffffffff8890bac2 RDI: ffffffff8c18ff90
RBP: ffffc9000527fd98 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000011adc R11: 0000000000000000 R12: ffff88806768f800
R13: 000000002046be40 R14: ffffc9000527fddc R15: 0000000000000002
FS:  00007f009fa996c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002046b030 CR3: 0000000053436000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2845
 do_recvmmsg+0x2af/0x750 net/socket.c:2939
 __sys_recvmmsg net/socket.c:3018 [inline]
 __do_sys_recvmmsg net/socket.c:3041 [inline]
 __se_sys_recvmmsg net/socket.c:3034 [inline]
 __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f009ec7cda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f009fa990c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f009edac050 RCX: 00007f009ec7cda9
RDX: 00000000040002db RSI: 0000000020000740 RDI: 0000000000000003
RBP: 00007f009ecc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f009edac050 R15: 00007ffecd12eaa8
 </TASK>