INFO: task udevd:5097 blocked for more than 143 seconds.
Not tainted 6.8.0-rc4-syzkaller-00219-gd80f8e96d47d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:23992 pid:5097 tgid:5097 ppid:4521 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17d1/0x49f0 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:1911
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: 0033:0x7fcc52197bf2
RSP: 002b:00007ffe7161d3d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcc52197bf2
RDX: 0000000000000000 RSI: 00007ffe7161d42f RDI: 000000000000000a
RBP: 00007ffe7161d42f R08: 0000000000000001 R09: 0000000000000000
R10: 000000000000010f R11: 0000000000000246 R12: 000000000000000a
R13: 00007fcc520c1ae0 R14: 0000000000000000 R15: 000055980dab3910
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
3 locks held by kworker/u4:4/59:
3 locks held by kworker/0:2/928:
#0: ffff888014c8c938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c8c938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc9000443fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc9000443fd20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8f374fc8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281
2 locks held by getty/4824:
#0: ffff88823bd688a0 (&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/0:5/5150:
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc9000463fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc9000463fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
1 lock held by syz-executor.2/11459:
6 locks held by kworker/u4:7/13412:
2 locks held by syz-executor.2/16044:
#0: ffffffff8f374fc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f374fc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1040 net/core/rtnetlink.c:6615
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:995
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-syzkaller-00219-gd80f8e96d47d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__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
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1091 Comm: kworker/u4:6 Not tainted 6.8.0-rc4-syzkaller-00219-gd80f8e96d47d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: krdsd rds_connect_worker
RIP: 0010:ipt_do_table+0x39e/0x1860 net/ipv4/netfilter/ip_tables.c:263
Code: 89 df e8 55 27 01 f8 48 8b 1b e8 ed 68 72 01 41 89 c4 48 89 9c 24 90 00 00 00 4c 8d 73 38 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 28 27 01 f8 44 89 e3 48 c1 e3 03 49 03 1e 48 89
RSP: 0018:ffffc90000007700 EFLAGS: 00000246
RAX: 1ffff1100f8e8907 RBX: ffff88807c744800 RCX: ffff88802275bb80
RDX: 0000000000000101 RSI: ffffffff8bfe6800 RDI: ffffffff8bfe67c0
RBP: ffffc900000078e8 R08: ffffffff89f461cd R09: 0000000000000000
R10: ffffc90000007860 R11: fffff52000000f10 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88807c744838 R15: ffff88801d89ee04
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fceee3a1eb0 CR3: 00000000225da000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline]
nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:269 [inline]
NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312
__netif_receive_skb_one_core net/core/dev.c:5534 [inline]
__netif_receive_skb+0x2bf/0x6a0 net/core/dev.c:5648
process_backlog+0x385/0x760 net/core/dev.c:5976
__napi_poll+0xcb/0x490 net/core/dev.c:6576
napi_poll net/core/dev.c:6645 [inline]
net_rx_action+0x78b/0x1010 net/core/dev.c:6778
__do_softirq+0x2bb/0x942 kernel/softirq.c:553
do_softirq+0x11b/0x1e0 kernel/softirq.c:454
__local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:381
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:820 [inline]
__dev_queue_xmit+0x15fd/0x3b10 net/core/dev.c:4378
dev_queue_xmit include/linux/netdevice.h:3171 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0xd37/0x1360 net/ipv4/ip_output.c:235
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x118a/0x1b50 net/ipv4/ip_output.c:535
__tcp_transmit_skb+0x2556/0x3b80 net/ipv4/tcp_output.c:1462
tcp_transmit_skb net/ipv4/tcp_output.c:1480 [inline]
tcp_connect+0x1b89/0x48c0 net/ipv4/tcp_output.c:4100
tcp_v4_connect+0x1128/0x1ba0 net/ipv4/tcp_ipv4.c:324
__inet_stream_connect+0x262/0xf30 net/ipv4/af_inet.c:678
inet_stream_connect+0x65/0xa0 net/ipv4/af_inet.c:749
kernel_connect+0x10b/0x160 net/socket.c:3625
rds_tcp_conn_path_connect+0x79a/0xbc0 net/rds/tcp_connect.c:176
rds_connect_worker+0x1dd/0x2a0 net/rds/threads.c:176
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
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