INFO: task syz.3.36:4538 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.36 state:D stack:28560 pid:4538 ppid:4279 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
rwsem_down_write_slowpath+0xbed/0x1090 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
open_last_lookups fs/namei.c:3547 [inline]
path_openat+0x7c2/0x2e70 fs/namei.c:3780
do_filp_open+0x1c1/0x3c0 fs/namei.c:3810
do_sys_openat2+0x142/0x490 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_open fs/open.c:1342 [inline]
__se_sys_open fs/open.c:1338 [inline]
__x64_sys_open+0x11b/0x140 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f74af98eec9
RSP: 002b:00007f74b088f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f74afbe6090 RCX: 00007f74af98eec9
RDX: 0000000000000110 RSI: 000000000014927e RDI: 0000200000000180
RBP: 00007f74afa11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74afbe6128 R14: 00007f74afbe6090 R15: 00007ffd8602c228
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2b570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2bd90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2abe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4030:
#0:
ffff88814c7e3098
(&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
2 locks held by syz.3.36/4528:
1 lock held by syz.3.36/4538:
#0: ffff888071fc8198 (&type->i_mutex_dir_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888071fc8198 (&type->i_mutex_dir_key#11){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3547 [inline]
#0: ffff888071fc8198 (&type->i_mutex_dir_key#11){+.+.}-{3:3}, at: path_openat+0x7c2/0x2e70 fs/namei.c:3780
1 lock held by syz-executor/4678:
2 locks held by kworker/u4:23/5646:
1 lock held by syz.1.375/5809:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 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+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4528 Comm: syz.3.36 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:reweight_entity+0x30c/0x4d0 kernel/sched/fair.c:3323
Code: 31 d2 48 f7 f1 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 38 80 3c 01 00 48 8b 5c 24 40 74 08 48 89 df e8 b4 7d 76 00 <48> 89 2b 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 20 80 3c 01 00
RSP: 0018:ffffc900001e0b40 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff888076323ce0 RCX: 1ffff1100ec6479c
RDX: 000000000000b102 RSI: ffffffff8a8c1680 RDI: ffff888076323c08
RBP: 00000000000003ff R08: dffffc0000000000 R09: ffffed100f6498f9
R10: ffffed100f6498f9 R11: 1ffff1100f6498f8 R12: ffff888076323cc8
R13: 1ffff110171e7581 R14: ffff888076323c00 R15: ffff8880b8f3ac08
FS: 00007f74b08b06c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe74f9bff8 CR3: 000000007651a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
update_cfs_group kernel/sched/fair.c:3479 [inline]
entity_tick kernel/sched/fair.c:5080 [inline]
task_tick_fair+0x21f/0xb30 kernel/sched/fair.c:11877
scheduler_tick+0x1ea/0x570 kernel/sched/core.c:5520
update_process_times+0x177/0x1b0 kernel/time/timer.c:1874
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1501
__run_hrtimer kernel/time/hrtimer.c:1747 [inline]
__hrtimer_run_queues+0x515/0xd60 kernel/time/hrtimer.c:1811
hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1948 [inline]
RIP: 0010:vprintk_emit+0x461/0x680 kernel/printk/printk.c:2302
Code: 85 8f 01 00 00 e8 ff b8 1a 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 ee b8 1a 00 eb 06 e8 e7 b8 1a 00 fb 48 c7 c7 80 ee b1 8c <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 37 db
RSP: 0018:ffffc900049df0c0 EFLAGS: 00000246
RAX: ffffffff81661609 RBX: ffffffff816614b5 RCX: 0000000000080000
RDX: ffffc9000ec3a000 RSI: 000000000007ffff RDI: ffffffff8cb1ee80
RBP: ffffc900049df1b0 R08: dffffc0000000000 R09: fffffbfff215c46e
R10: fffffbfff215c46e R11: 1ffffffff215c46d R12: dffffc0000000000
R13: 1ffff9200093be1c R14: 0000000000000200 R15: 0000000000000057
_printk+0xcc/0x110 kernel/printk/printk.c:2328
_erofs_err+0x11f/0x170 fs/erofs/super.c:35
z_erofs_pcluster_readmore+0x367/0x4f0 fs/erofs/zdata.c:1658
z_erofs_read_folio+0x23b/0x5b0 fs/erofs/zdata.c:1681
filemap_read_folio+0x160/0x760 mm/filemap.c:2490
do_read_cache_folio+0x2a0/0x760 mm/filemap.c:3627
erofs_bread+0x18e/0x670 fs/erofs/data.c:50
erofs_find_target_block fs/erofs/namei.c:102 [inline]
erofs_namei+0x28f/0xf00 fs/erofs/namei.c:175
erofs_lookup+0x14b/0x390 fs/erofs/namei.c:204
lookup_open fs/namei.c:3460 [inline]
open_last_lookups fs/namei.c:3550 [inline]
path_openat+0xfaf/0x2e70 fs/namei.c:3780
do_filp_open+0x1c1/0x3c0 fs/namei.c:3810
do_sys_openat2+0x142/0x490 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x135/0x160 fs/open.c:1345
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f74af98eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f74b08b0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f74afbe5fa0 RCX: 00007f74af98eec9
RDX: 0000000000143042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f74afa11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74afbe6038 R14: 00007f74afbe5fa0 R15: 00007ffd8602c228