INFO: task syz-executor145:5039 blocked for more than 143 seconds.
Not tainted 6.6.0-rc7-syzkaller-00142-g888cf78c29e2 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor145 state:D stack:28320 pid:5039 ppid:5035 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0xee1/0x5a10 kernel/sched/core.c:6695
schedule+0xe7/0x1b0 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
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+0xf0/0x470 kernel/locking/rwsem.c:1522
__super_lock fs/super.c:58 [inline]
super_lock+0x23c/0x380 fs/super.c:117
super_lock_shared fs/super.c:146 [inline]
iterate_supers+0xb9/0x230 fs/super.c:966
ksys_sync+0x8a/0x150 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff4fcef4bd9
RSP: 002b:00007ff4fce90218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007ff4fcf7d6d8 RCX: 00007ff4fcef4bd9
RDX: ffffffffffffffb0 RSI: 0000000000000000 RDI: 0000000000000080
RBP: 00007ff4fcf7d6d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff4fcf4a5c0
R13: 00007ff4fcf490c0 R14: 00007ff4fcf4906b R15: 0030656c69662f2e
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8cbab2e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4787:
#0: ffff888025e540a0 (&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+0xfc5/0x1480 drivers/tty/n_tty.c:2206
1 lock held by syz-executor145/5038:
1 lock held by syz-executor145/5039:
#0: ffff88807a3d40e0 (&type->s_umount_key#60){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807a3d40e0 (&type->s_umount_key#60){++++}-{3:3}, at: super_lock+0x23c/0x380 fs/super.c:117
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc7-syzkaller-00142-g888cf78c29e2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1047 Comm: kworker/u4:6 Not tainted 6.6.0-rc7-syzkaller-00142-g888cf78c29e2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_apic_mem_read arch/x86/include/asm/apic.h:99 [inline]
RIP: 0010:apic_mem_wait_icr_idle arch/x86/kernel/apic/ipi.c:122 [inline]
RIP: 0010:__default_send_IPI_dest_field+0x35/0xf0 arch/x86/kernel/apic/ipi.c:172
Code: 89 fc 89 d5 53 48 83 ec 08 83 fe 02 74 60 a0 60 f8 eb ff ff fb ff ff 84 c0 74 08 3c 03 0f 8e 86 00 00 00 8b 04 25 00 c3 5f ff <48> bb 60 f8 eb ff ff fb ff ff f6 c4 10 74 19 f3 90 0f b6 03 84 c0
RSP: 0018:ffffc900048178e0 EFLAGS: 00000046
RAX: 00000000000008fb RBX: 0000000000000002 RCX: ffffffff818e90cb
RDX: 0000000000000800 RSI: 00000000000000fb RDI: 0000000002000000
RBP: 0000000000000800 R08: 0000000000000000 R09: fffffbfff1d983da
R10: ffffffff8ecc1ed7 R11: 0000000000000000 R12: 0000000002000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b983d8d0
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005584fee07a90 CR3: 000000000c976000 CR4: 0000000000350ef0
Call Trace:
_flat_send_IPI_mask+0x40/0x70 arch/x86/kernel/apic/apic_flat_64.c:36
arch_send_call_function_single_ipi arch/x86/include/asm/smp.h:103 [inline]
send_call_function_single_ipi kernel/smp.c:117 [inline]
smp_call_function_many_cond+0x12df/0x1570 kernel/smp.c:826
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1012
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2006 [inline]
text_poke_bp_batch+0x746/0x960 arch/x86/kernel/alternative.c:2299
text_poke_flush arch/x86/kernel/alternative.c:2407 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2404 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2414
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x32e/0x410 kernel/jump_label.c:829
static_key_enable_cpuslocked+0x1b5/0x270 kernel/jump_label.c:205
static_key_enable+0x1a/0x20 kernel/jump_label.c:218
toggle_allocation_gate mm/kfence/core.c:830 [inline]
toggle_allocation_gate+0xf4/0x250 mm/kfence/core.c:822
process_one_work+0x884/0x15c0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
kthread+0x33c/0x440 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304