INFO: task kworker/1:4:5169 blocked for more than 147 seconds.
Not tainted 6.10.0-rc4-next-20240620-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4 state:D stack:21136 pid:5169 tgid:5169 ppid:2 flags:0x00004000
Workqueue: events switchdev_deferred_process_work
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
process_one_work kernel/workqueue.c:3224 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3305
worker_thread+0x86d/0xd50 kernel/workqueue.c:3385
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e3357a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:333 [inline]
#0: ffffffff8e3357a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:845 [inline]
#0: ffffffff8e3357a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6688
3 locks held by kworker/u8:9/2844:
#0: ffff88802a773148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
#0: ffff88802a773148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1: ffffc9000973fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
#1: ffffc9000973fd00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4733
2 locks held by getty/4850:
#0: ffff88802f7190a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
6 locks held by kworker/u9:2/5119:
#0: ffff88802472a148 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
#0: ffff88802472a148 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1: ffffc900038a7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
#1: ffffc900038a7d00 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2: ffff88807e568d88 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:309
#3: ffff88807e568078 (&hdev->lock){+.+.}-{3:3}, at: hci_abort_conn_sync+0x1ea/0xde0 net/bluetooth/hci_sync.c:5429
#4: ffffffff8f7646c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:1964 [inline]
#4: ffffffff8f7646c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_failed+0x185/0x340 net/bluetooth/hci_conn.c:1257
#5: ffffffff8e33ab78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#5: ffffffff8e33ab78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x381/0x830 kernel/rcu/tree_exp.h:959
3 locks held by kworker/1:4/5169:
#0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3199 [inline]
#0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3305
#1: ffffc90003867d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3200 [inline]
#1: ffffc90003867d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3305
#2: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by syz-executor.4/5727:
#0: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3500
2 locks held by kworker/u8:11/5931:
4 locks held by kworker/u8:12/5932:
6 locks held by syz-executor.1/16045:
1 lock held by syz-executor.3/16052:
2 locks held by syz-executor.0/16141:
#0: ffffffff8f5ea750 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4c6/0x7b0 net/core/net_namespace.c:504
#1: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_killable+0x115/0x2a0 net/core/rtnetlink.c:157
1 lock held by syz-executor.1/16176:
#0: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724
1 lock held by syz-executor.2/16181:
#0: ffffffff8f5f7008 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x839/0x1170 net/core/rtnetlink.c:6724
1 lock held by syz-executor.2/16185:
1 lock held by syz-executor.0/16186:
1 lock held by syz-executor.3/16187:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc4-next-20240620-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16196 Comm: syz-executor.4 Not tainted 6.10.0-rc4-next-20240620-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:__sanitizer_cov_trace_switch+0xa/0x120 kernel/kcov.c:317
Code: cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 41 56 41 54 <53> 4c 8b 16 48 8b 46 08 48 83 c0 f8 48 c1 c0 3d 48 83 f8 02 7f 1f
RSP: 0018:ffffc90002e07500 EFLAGS: 00000293
RAX: 0000000000000005 RBX: 0000000000000075 RCX: 000000008bcb8903
RDX: 0000000000000000 RSI: ffffffff8f965400 RDI: 0000000000000075
RBP: ffffc90002e07610 R08: 0000000000000001 R09: ffffffff8b86771d
R10: 0000000000000005 R11: ffff88802a02da00 R12: 1ffffffff1797128
R13: ffffffff8bcb8943 R14: dffffc0000000000 R15: ffff0000ffffff00
FS: 0000555589ebc480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcd49877f30 CR3: 00000000764aa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
format_decode+0x9f1/0x1bb0 lib/vsprintf.c:2634
vsnprintf+0x14f/0x1da0 lib/vsprintf.c:2776
snprintf+0xda/0x120 lib/vsprintf.c:2959
print_caller kernel/printk/printk.c:1360 [inline]
info_print_prefix+0x1f0/0x310 kernel/printk/printk.c:1379
get_record_print_text_size kernel/printk/printk.c:1514 [inline]
find_first_fitting_seq+0x1b2/0x580 kernel/printk/printk.c:1543
syslog_print_all+0x1ae/0x7e0 kernel/printk/printk.c:1691
do_syslog+0x455/0x810 kernel/printk/printk.c:1769
__do_sys_syslog kernel/printk/printk.c:1847 [inline]
__se_sys_syslog kernel/printk/printk.c:1845 [inline]
__x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1845
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd4987cf29
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:00007ffd98a6d128 EFLAGS: 00000246 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcd4987cf29
RDX: 000000000000003f RSI: 00007ffd98a6d210 RDI: 0000000000000003
RBP: 00007ffd98a6d210 R08: 7fffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd98a6d7f8
R13: 00007ffd98a6dede R14: 0000000000000001 R15: 0000000000000001