INFO: task syz.2.3031:21256 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3031 state:D stack:25640 pid:21256 tgid:21256 ppid:18495 task_flags:0x400040 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
request_wait_answer fs/fuse/dev.c:743 [inline]
__fuse_request_send fs/fuse/dev.c:757 [inline]
fuse_chan_send+0x1065/0x1ac0 fs/fuse/dev.c:833
fuse_simple_request fs/fuse/fuse_i.h:1012 [inline]
fuse_flush+0x66e/0x8b0 fs/fuse/file.c:504
filp_flush+0xbd/0x190 fs/open.c:1471
filp_close+0x1d/0x40 fs/open.c:1484
__range_close fs/file.c:793 [inline]
__do_sys_close_range fs/file.c:854 [inline]
__se_sys_close_range+0x3d3/0x900 fs/file.c:818
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f344619de99
RSP: 002b:00007ffec51078a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffec5107990 RCX: 00007f344619de99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000012180c R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2ed20000 R11: 0000000000000246 R12: 00007ffec51079d0
R13: 00007f3446425fac R14: 00000000001219e4 R15: 00007f3446425fa0
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#0: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
2 locks held by ksoftirqd/0/15:
#0: ffff8880b863b160 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb2/0x160 kernel/sched/core.c:675
#1: ffff8880b8624440 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x57/0x7d0 kernel/sched/psi.c:933
1 lock held by khungtaskd/32:
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5373:
#0: ffff8880367870a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
2 locks held by kworker/1:2/10450:
2 locks held by syz-executor/22083:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 32 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 22913 Comm: syz.3.3330 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:__sort_r+0x16a3/0x3530 lib/sort.c:-1
Code: 89 c6 e8 b0 e0 f6 fc 85 ed 7f 03 4c 89 f3 4c 8b 64 24 18 4d 8d 3c 5c 4f 8d 34 27 4c 3b 74 24 38 73 17 e8 50 dc f6 fc 4c 89 fb 63 ff ff ff e8 43 dc f6 fc 49 89 ed eb 10 e8 39 dc f6 fc 49 89
RSP: 0018:ffffc90003f372a0 EFLAGS: 00000246
RAX: ffffffff84d027b0 RBX: 0000000000003ff4 RCX: 0000000000080000
RDX: ffffc9002de03000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000000 R08: ffff88807fa5dd00 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff81ef7c00 R12: 0000000000000004
R13: 0000000000000000 R14: 0000000000003ff8 R15: 0000000000003ff4
FS: 00007f9fcc7c16c0(0000) GS:ffff888124f4e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005598b5a5d218 CR3: 000000004d526000 CR4: 0000000000350ef0
Call Trace:
sort+0xb0/0x100 lib/sort.c:342
sort_insn_array_uniq kernel/bpf/cfg.c:221 [inline]
bpf_copy_insn_array_uniq kernel/bpf/cfg.c:242 [inline]
jt_from_map kernel/bpf/cfg.c:258 [inline]
jt_from_subprog kernel/bpf/cfg.c:294 [inline]
create_jt kernel/bpf/cfg.c:337 [inline]
visit_gotox_insn kernel/bpf/cfg.c:365 [inline]
visit_insn kernel/bpf/cfg.c:528 [inline]
bpf_check_cfg+0x15c8/0x3680 kernel/bpf/cfg.c:592
bpf_check+0x464b/0x5480 kernel/bpf/verifier.c:19888
bpf_prog_load+0x1577/0x1c00 kernel/bpf/syscall.c:3197
__sys_bpf+0xd0d/0xd90 kernel/bpf/syscall.c:6418
__do_sys_bpf kernel/bpf/syscall.c:6537 [inline]
__se_sys_bpf kernel/bpf/syscall.c:6534 [inline]
__x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6534
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fcb99de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9fcc7c1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f9fcbc26090 RCX: 00007f9fcb99de99
RDX: 0000000000000094 RSI: 0000200000000340 RDI: 0000000000000005
RBP: 00007f9fcba33eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9fcbc26128 R14: 00007f9fcbc26090 R15: 00007fff295334d8