INFO: task syz.3.2030:11435 blocked for more than 148 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2030 state:D stack:25160 pid:11435 tgid:11435 ppid:5802 task_flags:0x400040 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
io_schedule+0x81/0xe0 kernel/sched/core.c:7871
folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1330
folio_wait_writeback+0xb0/0x100 mm/page-writeback.c:3095
__filemap_fdatawait_range+0x147/0x230 mm/filemap.c:542
filemap_fdatawait_range+0x25/0x40 mm/filemap.c:568
filemap_fdatawait include/linux/pagemap.h:50 [inline]
__writeback_single_inode+0x1dc/0x1000 fs/fs-writeback.c:1729
writeback_single_inode+0x1db/0x640 fs/fs-writeback.c:1840
write_inode_now+0x160/0x1d0 fs/fs-writeback.c:2903
fuse_flush+0x26c/0x810 fs/fuse/file.c:460
filp_flush+0xc0/0x190 fs/open.c:1549
filp_close+0x1d/0x40 fs/open.c:1562
__range_close fs/file.c:767 [inline]
__do_sys_close_range fs/file.c:826 [inline]
__se_sys_close_range+0x35c/0x650 fs/file.c:790
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f83b8e6efc9
RSP: 002b:00007fff31bc8aa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f83b90c7da0 RCX: 00007f83b8e6efc9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f83b90c7da0 R08: 0000000000000104 R09: 0000000a31bc8d9f
R10: 00007f83b90c7cb0 R11: 0000000000000246 R12: 0000000000066f01
R13: 00007fff31bc8ba0 R14: ffffffffffffffff R15: 00007fff31bc8bc0
INFO: task syz.3.2030:11440 blocked for more than 148 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2030 state:D stack:24840 pid:11440 tgid:11435 ppid:5802 task_flags:0x400040 flags:0x00080003
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
io_schedule+0x81/0xe0 kernel/sched/core.c:7871
folio_wait_bit_common+0x6b5/0xb90 mm/filemap.c:1330
folio_wait_writeback+0xb0/0x100 mm/page-writeback.c:3095
__filemap_fdatawait_range+0x147/0x230 mm/filemap.c:542
file_write_and_wait_range+0x290/0x340 mm/filemap.c:801
fuse_fsync+0x127/0x310 fs/fuse/file.c:535
generic_write_sync include/linux/fs.h:3046 [inline]
fuse_cache_write_iter fs/fuse/file.c:1470 [inline]
fuse_file_write_iter+0xeee/0x10c0 fs/fuse/file.c:1783
do_iter_readv_writev+0x635/0x8d0 fs/read_write.c:-1
vfs_writev+0x323/0x970 fs/read_write.c:1057
do_writev+0x153/0x2d0 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f83b8e6efc9
RSP: 002b:00007f83b708c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f83b90c6180 RCX: 00007f83b8e6efc9
RDX: 0000000000000001 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f83b8ef1f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83b90c6218 R14: 00007f83b90c6180 R15: 00007fff31bc8948
Showing all locks held in the system:
4 locks held by pr/legacy/17:
1 lock held by khungtaskd/38:
#0: ffffffff8d5aa4c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8d5aa4c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8d5aa4c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:4/68:
#0: ffff88801eae2938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
#0: ffff88801eae2938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
#1: ffffc9000153fba0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
#1: ffffc9000153fba0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
2 locks held by getty/5561:
#0: ffff88823bf2e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e832e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x444/0x1400 drivers/tty/n_tty.c:2222
11 locks held by kworker/u8:15/8378:
4 locks held by kworker/u8:19/8383:
4 locks held by kworker/u8:24/8388:
5 locks held by syz-executor/10567:
3 locks held by syz.3.2030/11440:
#0: ffff88802e5f8b28 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x253/0x320 fs/file.c:1232
#1: ffff8880325e2480 (sb_writers#22){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3111 [inline]
#1: ffff8880325e2480 (sb_writers#22){.+.+}-{0:0}, at: vfs_writev+0x28e/0x970 fs/read_write.c:1055
#2: ffff88805f7209b8 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
#2: ffff88805f7209b8 (&sb->s_type->i_mutex_key#30){+.+.}-{4:4}, at: fuse_fsync+0x114/0x310 fs/fuse/file.c:528
1 lock held by syz.5.2358/12585:
3 locks held by syz.6.2359/12584:
#0: ffff88806953d078 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
#0: ffff88806953d078 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release net/socket.c:661 [inline]
#0: ffff88806953d078 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1455
#1: ffffffff8e8c7800 ((netlink_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x54/0x90 kernel/notifier.c:379
#2: ffff88805dd1f8c8 (&nft_net->commit_mutex){+.+.}-{4:4}, at: nft_rcv_nl_event+0x116/0x640 net/netfilter/nf_tables_api.c:12087
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf60/0xfa0 kernel/hung_task.c:495
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 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: 5877 Comm: kworker/0:5 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events_power_efficient gc_worker
RIP: 0010:check_preemption_disabled+0x40/0x120 lib/smp_processor_id.c:53
Code: 08 65 8b 05 d6 e4 e1 06 65 8b 0d cb e4 e1 06 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d ab e4 e1 06 48 3b 4c 24 08 0f 85 cc 00 00 00 <48> 83 c4 10 5b 41 5e 41 5f 5d e9 d1 a3 03 00 cc 48 c7 04 24 00 00
RSP: 0018:ffffc90005227780 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff88f0009f RCX: 254f42855a08e100
RDX: 0000000000000000 RSI: ffffffff8b3ddbc0 RDI: ffffffff8b3ddb80
RBP: ffffc900052278f0 R08: 0000000000000000 R09: ffffffff88f0009f
R10: dffffc0000000000 R11: fffffbfff1dac52f R12: 0000000000000200
R13: ffffffff88f0009f R14: ffffffff8ed6ae38 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888126dfc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f30dff8 CR3: 000000000d3a6000 CR4: 00000000003526f0
Call Trace:
rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:751
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3e0 kernel/locking/lockdep.c:5879
seqcount_lockdep_reader_access+0x11e/0x1c0 include/linux/seqlock.h:74
nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:342 [inline]
gc_worker+0x31f/0x13f0 net/netfilter/nf_conntrack_core.c:1548
process_one_work kernel/workqueue.c:3263 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245