INFO: task klogd:2991 blocked for more than 143 seconds.
      Not tainted 6.1.78-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:klogd           state:D stack:23880 pid:2991  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 wait_for_unix_gc+0x14c/0x210 net/unix/garbage.c:201
 unix_dgram_sendmsg+0x113/0x2050 net/unix/af_unix.c:1899
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2148
 __do_sys_sendto net/socket.c:2160 [inline]
 __se_sys_sendto net/socket.c:2156 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb1a73789b5
RSP: 002b:00007fff24fa56b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fb1a73789b5
RDX: 0000000000000081 RSI: 000055e87f46d370 RDI: 0000000000000003
RBP: 000055e87f465910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007fb1a7506212 R14: 00007fff24fa57b8 R15: 0000000000000000
 </TASK>
INFO: task dhcpcd:3215 blocked for more than 143 seconds.
      Not tainted 6.1.78-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:23176 pid:3215  ppid:1      flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 wait_for_unix_gc+0x14c/0x210 net/unix/garbage.c:201
 unix_dgram_sendmsg+0x113/0x2050 net/unix/af_unix.c:1899
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 sock_write_iter+0x394/0x4e0 net/socket.c:1143
 call_write_iter include/linux/fs.h:2249 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x7ae/0xba0 fs/read_write.c:584
 ksys_write+0x19c/0x2c0 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6ca7f7fbf2
RSP: 002b:00007ffc74ff6638 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055ad0cab1770 RCX: 00007f6ca7f7fbf2
RDX: 0000000000000048 RSI: 00007ffc74ff6650 RDI: 0000000000000005
RBP: 00007ffc74ff6650 R08: 0000000000000008 R09: 0000000000000037
R10: 0000000000000000 R11: 0000000000000246 R12: 000055ad0b2ebefc
R13: 00007ffc74ff6a80 R14: 000055ad0cb7f2e0 R15: 0000000000000001
 </TASK>
INFO: task syz-executor.4:455 blocked for more than 144 seconds.
      Not tainted 6.1.78-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:26392 pid:455   ppid:9860   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 wait_for_unix_gc+0x14c/0x210 net/unix/garbage.c:201
 unix_dgram_sendmsg+0x113/0x2050 net/unix/af_unix.c:1899
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmmsg+0x3ab/0x730 net/socket.c:2654
 __do_sys_sendmmsg net/socket.c:2683 [inline]
 __se_sys_sendmmsg net/socket.c:2680 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2680
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f307fa7dda9
RSP: 002b:00007f30808cd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f307fbabf80 RCX: 00007f307fa7dda9
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000006
RBP: 00007f307faca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f307fbabf80 R15: 00007ffc890f0d48
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d12a910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d12b110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
 #0: ffffffff8d12a740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:318 [inline]
 #0: ffffffff8d12a740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:759 [inline]
 #0: ffffffff8d12a740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3307:
 #0: ffff88802846e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
2 locks held by kworker/u4:13/4255:
2 locks held by kworker/1:33/23030:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc90014577d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
1 lock held by syz-executor.0/414:
7 locks held by syz-executor.0/1099:
 #0: ffff88807ea62460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x269/0xba0 fs/read_write.c:580
 #1: ffff88804ac0d888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1e7/0x4f0 fs/kernfs/file.c:321
 #2: ffff888021982da0 (kn->active#52){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20b/0x4f0 fs/kernfs/file.c:322
 #3: ffffffff8dc094e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x1ad/0x800 drivers/net/netdevsim/bus.c:160
 #4: ffff88804f10b0e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline]
 #4: ffff88804f10b0e8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:990
 #5: ffff88804f10e2f8 (&devlink->lock_key#15){+.+.}-{3:3}, at: nsim_drv_probe+0xc9/0xb20 drivers/net/netdevsim/dev.c:1539
 #6: ffffffff8e294ba8 (rtnl_mutex){+.+.}-{3:3}, at: nsim_init_netdevsim drivers/net/netdevsim/netdev.c:310 [inline]
 #6: ffffffff8e294ba8 (rtnl_mutex){+.+.}-{3:3}, at: nsim_create+0x30c/0x3f0 drivers/net/netdevsim/netdev.c:365
2 locks held by syz-executor.3/1143:
 #0: ffffffff8e294ba8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
 #0: ffffffff8e294ba8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x7c1/0xff0 net/core/rtnetlink.c:6119
 #1: ffffffff8d12fd38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
 #1: ffffffff8d12fd38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3b0/0x8a0 kernel/rcu/tree_exp.h:949

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.78-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+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xf88/0xfd0 kernel/hung_task.c:377
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1143 Comm: syz-executor.3 Not tainted 6.1.78-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:vsnprintf+0x3d2/0x1c70 lib/vsprintf.c:2838
Code: 08 0f 87 91 08 00 00 e8 dc d3 05 f7 48 8b 7c 24 30 48 89 f8 48 c1 e8 03 42 80 3c 28 00 74 05 e8 04 41 5d f7 89 d8 49 03 5e 10 <44> 8d 78 08 48 8b 44 24 10 42 0f b6 04 28 84 c0 0f 85 80 15 00 00
RSP: 0018:ffffc900031ae420 EFLAGS: 00000282
RAX: 0000000000000010 RBX: ffffc900031ae540 RCX: ffff888041ed1dc0
RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffffc900031ae590
RBP: ffffc900031ae510 R08: ffffffff8a84a9b0 R09: ffffffff8a84a7a1
R10: 0000000000000012 R11: ffff888041ed1dc0 R12: ffffc900031ae7a1
R13: dffffc0000000000 R14: ffffc900031ae580 R15: ffffc900831ae79f
FS:  0000555556429480(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f8556f440 CR3: 00000000827c1000 CR4: 00000000003506e0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 sprintf+0xd6/0x120 lib/vsprintf.c:3009
 print_time kernel/printk/printk.c:1274 [inline]
 info_print_prefix+0x167/0x300 kernel/printk/printk.c:1300
 record_print_text kernel/printk/printk.c:1349 [inline]
 console_emit_next_record+0x71c/0xea0 kernel/printk/printk.c:2725
 console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
 _printk+0xd1/0x111 kernel/printk/printk.c:2293
 br_set_state+0x4b7/0x770 net/bridge/br_stp.c:57
 new_nbp+0x310/0x430 net/bridge/br_if.c:443
 br_add_if+0x29f/0xed0 net/bridge/br_if.c:599
 do_set_master net/core/rtnetlink.c:2598 [inline]
 do_setlink+0xe99/0x3e30 net/core/rtnetlink.c:2808
 __rtnl_newlink net/core/rtnetlink.c:3576 [inline]
 rtnl_newlink+0x172c/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6122
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 __sys_sendto+0x480/0x600 net/socket.c:2148
 __do_sys_sendto net/socket.c:2160 [inline]
 __se_sys_sendto net/socket.c:2156 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:2156
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f04aa87fa9c
Code: 1a 51 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 60 51 02 00 48 8b
RSP: 002b:00007ffcfc980860 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f04ab4d4620 RCX: 00007f04aa87fa9c
RDX: 0000000000000028 RSI: 00007f04ab4d4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffcfc9808b4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f04ab4d4670 R15: 0000000000000000
 </TASK>