INFO: task syz-executor.1:8229 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00053-ge33c4963bf53 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29024 pid:8229 tgid:8223 ppid:6371 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
do_linkat+0x141/0x600 fs/namei.c:4656
__do_sys_link fs/namei.c:4710 [inline]
__se_sys_link fs/namei.c:4708 [inline]
__x64_sys_link+0x81/0xa0 fs/namei.c:4708
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f760aa7dea9
RSP: 002b:00007f760b7d20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f760abac050 RCX: 00007f760aa7dea9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000000
RBP: 00007f760aaca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f760abac050 R15: 00007fff4183dcc8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:3/50:
2 locks held by getty/4827:
#0: ffff88802fa480a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.1/8224:
1 lock held by syz-executor.1/8229:
#0: ffff88805a51c6d0 (&type->i_mutex_dir_key#23){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88805a51c6d0 (&type->i_mutex_dir_key#23){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805a51c6d0 (&type->i_mutex_dir_key#23){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
4 locks held by kvm-nx-lpage-re/9848:
1 lock held by syz-executor.1/9870:
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.0/9879:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00053-ge33c4963bf53 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
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 PID: 5071 Comm: syz-fuzzer Not tainted 6.9.0-rc5-syzkaller-00053-ge33c4963bf53 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__lock_release kernel/locking/lockdep.c:5438 [inline]
RIP: 0010:lock_release+0x237/0x6c0 kernel/locking/lockdep.c:5774
Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 29 04 00 00 <8b> 53 24 85 d2 0f 85 bc 03 00 00 48 8d 7b 22 48 b8 00 00 00 00 00
RSP: 0000:ffffc90000a08bf8 EFLAGS: 00000046
RAX: 0000000000000007 RBX: ffff888025a9a9a0 RCX: ffffc90000a08c48
RDX: 0000000000000000 RSI: ffff8880b9528a08 RDI: ffff888025a9a9c4
RBP: 1ffff92000141181 R08: 0000000000000000 R09: fffffbfff1f3e98a
R10: ffffffff8f9f4c57 R11: 0000000000000005 R12: ffff8880b9528a08
R13: 0000000000000006 R14: ffff888025a9a8d0 R15: ffff888025a99e00
FS: 000000c000313090(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3bcc57db38 CR3: 000000002cca2000 CR4: 00000000003506f0
Call Trace:
do_write_seqcount_end include/linux/seqlock.h:515 [inline]
psi_account_irqtime+0x305/0x510 kernel/sched/psi.c:1021
update_rq_clock_task kernel/sched/core.c:726 [inline]
update_rq_clock kernel/sched/core.c:770 [inline]
update_rq_clock+0x250/0xb30 kernel/sched/core.c:751
ttwu_queue kernel/sched/core.c:4056 [inline]
try_to_wake_up+0x56a/0x13e0 kernel/sched/core.c:4378
hrtimer_wakeup+0x47/0x60 kernel/time/hrtimer.c:1946
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:tcp_tso_segs+0x2ca/0x350 net/ipv4/tcp_output.c:2032
Code: 00 00 00 fc ff df 48 8b 6b 30 48 8d bd 24 08 00 00 48 89 fa 48 c1 ea 03 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 6a <44> 0f b6 a5 24 08 00 00 e9 a7 fd ff ff e8 24 21 a0 f8 e9 75 ff ff
RSP: 0000:ffffc9000315f0f8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88807e6c0c40 RCX: ffffffff894a394f
RDX: 0000000000000004 RSI: ffffffff8948c948 RDI: ffffffff949f5f64
RBP: ffffffff949f5740 R08: 0000000000000005 R09: 0000000080000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000580 R14: 00000000d7a6f641 R15: ffff88807e6c0c70
tcp_write_xmit+0xf5/0x7e50 net/ipv4/tcp_output.c:2724
__tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:2977
tcp_push_pending_frames include/net/tcp.h:2106 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5653 [inline]
tcp_rcv_established+0xe32/0x21b0 net/ipv4/tcp_input.c:6081
tcp_v4_do_rcv+0x6a9/0xa50 net/ipv4/tcp_ipv4.c:1906
tcp_v4_rcv+0x3377/0x3b20 net/ipv4/tcp_ipv4.c:2332
ip_protocol_deliver_rcu+0xba/0x4e0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233
NF_HOOK include/linux/netfilter.h:314 [inline]
NF_HOOK include/linux/netfilter.h:308 [inline]
ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254
dst_input include/net/dst.h:460 [inline]
ip_sublist_rcv_finish+0x2c1/0x620 net/ipv4/ip_input.c:580
ip_list_rcv_finish.constprop.0+0x559/0x720 net/ipv4/ip_input.c:631
ip_sublist_rcv net/ipv4/ip_input.c:639 [inline]
ip_list_rcv+0x339/0x450 net/ipv4/ip_input.c:674
__netif_receive_skb_list_ptype net/core/dev.c:5587 [inline]
__netif_receive_skb_list_core+0x755/0x950 net/core/dev.c:5635
__netif_receive_skb_list net/core/dev.c:5687 [inline]
netif_receive_skb_list_internal+0x753/0xda0 net/core/dev.c:5779
gro_normal_list include/net/gro.h:438 [inline]
gro_normal_list include/net/gro.h:434 [inline]
napi_complete_done+0x23f/0x9a0 net/core/dev.c:6119
virtqueue_napi_complete drivers/net/virtio_net.c:515 [inline]
virtnet_poll+0x1014/0x18c0 drivers/net/virtio_net.c:2227
__napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:6638
napi_poll net/core/dev.c:6707 [inline]
net_rx_action+0x9ad/0xf10 net/core/dev.c:6822
__do_softirq+0x218/0x922 kernel/softirq.c:554
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:633 [inline]
irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
common_interrupt+0x57/0xd0 arch/x86/kernel/irq.c:247
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
RIP: 0033:0x66a6f0
Code: 21 e1 4d 89 e5 41 81 e4 ff 7f 00 00 47 8b 0c 11 41 0f c9 45 69 c9 bd a7 35 1e 41 c1 e9 0f 41 81 e1 ff ff 01 00 46 8b 54 88 68 <46> 89 94 a0 68 00 08 00 4c 8b 90 68 00 0a 00 4d 01 ea 46 89 54 88
RSP: 002b:000000c000de9180 EFLAGS: 00000202
RAX: 000000c000b0a000 RBX: 0000000000000038 RCX: 000000000000914e
RDX: 0000000000010000 RSI: 0000000000001145 RDI: 0000000000000020
RBP: 000000c000de91e0 R08: 0000000000009165 R09: 000000000001529b
R10: 0000000000363c30 R11: 0000000000000000 R12: 000000000000114a
R13: 000000000000914a R14: 000000c0000061a0 R15: 0000000000006ebb