INFO: task udevd:5147 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:22712 pid:5147  tgid:5147  ppid:4513   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: 0033:0x7f401cb85bf2
RSP: 002b:00007ffcd619c4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f401cb85bf2
RDX: 0000000000000000 RSI: 00007ffcd619c4ff RDI: 000000000000000a
RBP: 00007ffcd619c4ff R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a
R13: 00007f401caafae0 R14: 0000000000000000 R15: 0000556fc586f910
 </TASK>
INFO: task udevd:5199 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:24720 pid:5199  tgid:5199  ppid:4513   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: 0033:0x7f401cb85bf2
RSP: 002b:00007ffcd619c4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f401cb85bf2
RDX: 0000000000000000 RSI: 00007ffcd619c4ff RDI: 000000000000000a
RBP: 00007ffcd619c4ff R08: 0000000000000001 R09: 1b2ca2f29ab8f988
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000a
R13: 00007f401caafae0 R14: 0000000000000000 R15: 0000556fc586f910
 </TASK>
INFO: task udevd:6793 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:21912 pid:6793  tgid:6793  ppid:4513   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: 0033:0x7f401cb85bf2
RSP: 002b:00007ffcd619c4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f401cb85bf2
RDX: 0000000000000000 RSI: 00007ffcd619c4ff RDI: 000000000000000a
RBP: 00007ffcd619c4ff R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a
R13: 00007f401caafae0 R14: 0000000000000000 R15: 0000556fc586f910
 </TASK>
INFO: task udevd:15903 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:22712 pid:15903 tgid:15903 ppid:4513   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: 0033:0x7f401cb85bf2
RSP: 002b:00007ffcd619c4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f401cb85bf2
RDX: 0000000000000000 RSI: 00007ffcd619c4ff RDI: 000000000000000a
RBP: 00007ffcd619c4ff R08: 0000000000000001 R09: 1b2ca2f29ab8f988
R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a
R13: 00007f401caafae0 R14: 0000000000000000 R15: 0000556fc586f910
 </TASK>
INFO: task syz-executor.2:3374 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:26840 pid:3374  tgid:3371  ppid:5096   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_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
 ____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: 0033:0x7fedf247dda9
RSP: 002b:00007fedf32b50c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fedf25abf80 RCX: 00007fedf247dda9
RDX: 0000000000000000 RSI: 0000000020001700 RDI: 0000000000000004
RBP: 00007fedf24ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fedf25abf80 R15: 00007ffd546c1858
 </TASK>
INFO: task syz-executor.3:3379 blocked for more than 145 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26840 pid:3379  tgid:3377  ppid:5098   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_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
 ____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: 0033:0x7f4a13a7dda9
RSP: 002b:00007f4a148530c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4a13babf80 RCX: 00007f4a13a7dda9
RDX: 0000000000000000 RSI: 0000000020001700 RDI: 0000000000000004
RBP: 00007f4a13aca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f4a13babf80 R15: 00007ffc61c95078
 </TASK>
INFO: task syz-executor.1:3381 blocked for more than 145 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:26840 pid:3381  tgid:3378  ppid:5108   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: 0033:0x7f3d1ac7dda9
RSP: 002b:00007f3d1b9f70c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f3d1adabf80 RCX: 00007f3d1ac7dda9
RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 00007f3d1acca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f3d1adabf80 R15: 00007fffdfe7d2f8
 </TASK>
INFO: task syz-executor.0:3382 blocked for more than 146 seconds.
      Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:27384 pid:3382  tgid:3380  ppid:5103   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: 0033:0x7fe42e47dda9
RSP: 002b:00007fe42d7ff0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fe42e5abf80 RCX: 00007fe42e47dda9
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000005
RBP: 00007fe42e4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe42e5abf80 R15: 00007ffea6548ef8
 </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 getty/4813:
 #0: ffff88802b86e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/u4:4/17012:
1 lock held by syz-executor.4/3370:

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3370 Comm: syz-executor.4 Not tainted 6.8.0-rc3-syzkaller-00317-g7521f258ea30 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x17/0x70 kernel/kcov.c:207
Code: 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 40 54 70 7e 65 8b 15 41 54 70 7e <f7> c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 fc 15 00 00
RSP: 0018:ffffc9001414fb78 EFLAGS: 00000246
RAX: ffffffff8a005acc RBX: ffff88806a4f3f70 RCX: ffff888079541dc0
RDX: 0000000080000000 RSI: ffffffff8baab5e0 RDI: ffffffff8bfd9460
RBP: ffffc9001414fcf0 R08: ffffffff92c534bf R09: 1ffffffff258a697
R10: dffffc0000000000 R11: fffffbfff258a698 R12: ffff88806a4f3e40
R13: 1ffff1100d49e7ee R14: 0000000000000000 R15: ffffffff8f466ba0
FS:  0000555555d4c480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556fc5c61dd8 CR3: 000000002321e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 unix_gc+0x107c/0x1350 net/unix/garbage.c:321
 unix_release_sock+0xadd/0xd20 net/unix/af_unix.c:683
 unix_release+0x91/0xc0 net/unix/af_unix.c:1064
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbc/0x240 net/socket.c:1421
 __fput+0x429/0x8a0 fs/file_table.c:376
 __do_sys_close fs/open.c:1554 [inline]
 __se_sys_close fs/open.c:1539 [inline]
 __x64_sys_close+0x7e/0x110 fs/open.c:1539
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f1da667cc9a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007ffcb8c74800 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1da667cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b32320000 R09: 0000000000000097
R10: 000000008135d7d7 R11: 0000000000000293 R12: 00007f1da62003c0
R13: ffffffffffffffff R14: 00007f1da6200000 R15: 0000000000109e75
 </TASK>