INFO: task udevd:19003 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:26064 pid:19003 tgid:19003 ppid:4508   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201
 unix_dgram_sendmsg+0x11a/0x2200 net/unix/af_unix.c:1924
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 sock_write_iter+0x2dd/0x400 net/socket.c:1160
 call_write_iter include/linux/fs.h:2085 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa81/0xcb0 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fec75916bf2
RSP: 002b:00007ffe660fafe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fec75916bf2
RDX: 0000000000000000 RSI: 00007ffe660fb03f RDI: 000000000000000a
RBP: 00007ffe660fb03f R08: 0000000000000001 R09: 15c50f457c38a0b7
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a
R13: 00007fec75da2ae0 R14: 0000000000000000 R15: 000055ac17d42910
 </TASK>
INFO: task syz-executor.2:20125 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:26840 pid:20125 tgid:20122 ppid:5069   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201
 unix_stream_sendmsg+0xd2/0x1230 net/unix/af_unix.c:2200
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f6b7387dda9
RSP: 002b:00007f6b745800c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f6b739abf80 RCX: 00007f6b7387dda9
RDX: 0000000000000001 RSI: 0000000020004ac0 RDI: 0000000000000004
RBP: 00007f6b738ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f6b739abf80 R15: 00007ffec9ece728
 </TASK>
INFO: task syz-executor.0:20126 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26840 pid:20126 tgid:20124 ppid:5086   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201
 unix_stream_sendmsg+0xd2/0x1230 net/unix/af_unix.c:2200
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f30d107dda9
RSP: 002b:00007f30d1d2f0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f30d11abf80 RCX: 00007f30d107dda9
RDX: 0000000000000002 RSI: 0000000020004880 RDI: 0000000000000004
RBP: 00007f30d10ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000041 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f30d11abf80 R15: 00007ffe8065e6b8
 </TASK>
INFO: task syz-executor.4:20128 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:25424 pid:20128 tgid:20127 ppid:5077   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201
 unix_stream_sendmsg+0xd2/0x1230 net/unix/af_unix.c:2200
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f80f787dda9
RSP: 002b:00007f80f6bff0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f80f79abf80 RCX: 00007f80f787dda9
RDX: 0000000020008001 RSI: 0000000020000600 RDI: 0000000000000004
RBP: 00007f80f78ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f80f79abf80 R15: 00007ffd305404a8
 </TASK>
INFO: task syz-executor.3:20134 blocked for more than 145 seconds.
      Not tainted 6.8.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:27760 pid:20134 tgid:20132 ppid:5073   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x177f/0x49a0 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6817
 wait_for_unix_gc+0x150/0x210 net/unix/garbage.c:201
 unix_stream_sendmsg+0xd2/0x1230 net/unix/af_unix.c:2200
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584
 ___sys_sendmsg net/socket.c:2638 [inline]
 __sys_sendmmsg+0x3b2/0x740 net/socket.c:2724
 __do_sys_sendmmsg net/socket.c:2753 [inline]
 __se_sys_sendmmsg net/socket.c:2750 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2750
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f11c207dda9
RSP: 002b:00007f11c2e960c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f11c21ac050 RCX: 00007f11c207dda9
RDX: 0000000000000001 RSI: 0000000020004880 RDI: 0000000000000004
RBP: 00007f11c20ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000041 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f11c21ac050 R15: 00007ffde8e13618
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:5/143:
2 locks held by getty/4811:
 #0: ffff88802b3160a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.1/20121:

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/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: 21390 Comm: syz-fuzzer Not tainted 6.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0033:0x41731e
Code: cc cc cc cc cc cc cc cc cc cc cc cc 55 48 89 e5 48 83 ec 10 48 8b 15 89 5e 03 02 84 02 48 be 00 00 00 00 00 80 00 00 48 01 c6 <48> c1 ee 1a 90 48 81 fe 00 00 40 00 0f 83 c6 00 00 00 48 8b 14 f2
RSP: 002b:000000c0078a7e70 EFLAGS: 00000202
RAX: 000000c007b56940 RBX: 0000000000000040 RCX: 000000c007b56940
RDX: 00007f1b43400000 RSI: 000080c007b56940 RDI: 000000000000000c
RBP: 000000c0078a7e80 R08: 0000000000014fb0 R09: 000000c000947000
R10: 000000000000005b R11: 000000000000005a R12: 0000000000000004
R13: 0000000000000004 R14: 000000c0017d5d40 R15: 0000000000000001
FS:  000000c000528490 GS:  0000000000000000