INFO: task syz.2.904:9669 blocked for more than 143 seconds.
Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.904 state:D stack:27632 pid:9669 tgid:9666 ppid:5818 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0xf43/0x5890 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6857
io_schedule+0xbf/0x130 kernel/sched/core.c:7690
folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1318
folio_wait_writeback+0x3c/0x90 mm/page-writeback.c:3179
__filemap_fdatawait_range+0x123/0x210 mm/filemap.c:542
filemap_fdatawait_keep_errors+0x21/0x30 mm/filemap.c:636
wait_sb_inodes fs/fs-writeback.c:2702 [inline]
sync_inodes_sb+0x5fe/0xa50 fs/fs-writeback.c:2824
sync_inodes_one_sb+0x52/0x60 fs/sync.c:77
iterate_supers+0xfb/0x240 fs/super.c:934
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:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f281098d169
RSP: 002b:00007f2811834038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f2810ba6160 RCX: 00007f281098d169
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2810ba6160 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f2810ba6160 R15: 00007fff8d57d848
Showing all locks held in the system:
2 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/31:
#0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:5/236:
2 locks held by getty/5574:
#0: ffff88814df3c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5830:
#0: ffffffff8e1c85b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
3 locks held by kworker/1:4/5868:
#0: ffff88801b078d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213
#1: ffffc900042dfd18 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214
#2: ffffffff8e1c85b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
3 locks held by syz.4.895/9591:
#0: ffff888040737eb8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
#1: ffff88807fdd6420 (sb_writers#20){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
#2: ffff888043580b70 (&ctx->wb_lock){+.+.}-{4:4}, at: netfs_writepages+0xb9/0x8f0 fs/netfs/write_issue.c:559
2 locks held by syz.2.904/9669:
#0: ffff88807fdd60e0 (&type->s_umount_key#78){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88807fdd60e0 (&type->s_umount_key#78){++++}-{4:4}, at: super_lock+0x31a/0x3f0 fs/super.c:120
#1: ffff88807fdd6948 (&s->s_sync_lock){+.+.}-{4:4}, at: wait_sb_inodes fs/fs-writeback.c:2641 [inline]
#1: ffff88807fdd6948 (&s->s_sync_lock){+.+.}-{4:4}, at: sync_inodes_sb+0x232/0xa50 fs/fs-writeback.c:2824
2 locks held by syz-executor/9945:
1 lock held by syz.1.1269/11934:
#0: ffffffff8e1c85b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334
3 locks held by rm/11965:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0xf62/0x12b0 kernel/hung_task.c:399
kthread+0x3af/0x750 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11969 Comm: dhcpcd-run-hook Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3799 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3819 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3874 [inline]
RIP: 0010:__lock_acquire+0x15f8/0x3c40 kernel/locking/lockdep.c:5228
Code: 89 44 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 16 26 00 00 48 bd 00 00 00 00 00 fc ff df 4c 8b 34 24 <4a> 8b 1c e5 20 dc a7 96 48 8d 43 f8 48 85 db 48 0f 45 d8 eb 04 48
RSP: 0018:ffffc9000488f8a0 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: f82fee0843743d03 RCX: ffffffff8195c6ae
RDX: 1ffffffff2dbf702 RSI: 0000000000000008 RDI: ffffffff96ec5cc0
RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff2dd8b98
R10: ffffffff96ec5cc7 R11: 0000000000000003 R12: 000000000006fb7e
R13: ffff88807c918000 R14: f82fee0843743d03 R15: ffff88807c918b68
FS: 00007fce694cc500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce696b95e8 CR3: 0000000071dde000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5851
seqcount_lockdep_reader_access include/linux/seqlock.h:72 [inline]
read_seqbegin include/linux/seqlock.h:836 [inline]
zone_span_seqbegin include/linux/memory_hotplug.h:103 [inline]
page_outside_zone_boundaries mm/page_alloc.c:437 [inline]
bad_range+0xa9/0x490 mm/page_alloc.c:456
__free_one_page+0x10a/0xd50 mm/page_alloc.c:787
free_pcppages_bulk+0x2e9/0x630 mm/page_alloc.c:1220
free_frozen_page_commit+0x5ad/0xfa0 mm/page_alloc.c:2635
free_frozen_pages+0x7e4/0xfb0 mm/page_alloc.c:2683
__put_partials+0x14c/0x170 mm/slub.c:3153
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4115 [inline]
slab_alloc_node mm/slub.c:4164 [inline]
kmem_cache_alloc_noprof+0x226/0x3d0 mm/slub.c:4171
getname_flags.part.0+0x4c/0x550 fs/namei.c:139
getname_flags include/linux/audit.h:322 [inline]
getname+0x8d/0xe0 fs/namei.c:223
__do_sys_execve fs/exec.c:2116 [inline]
__se_sys_execve fs/exec.c:2111 [inline]
__x64_sys_execve+0x72/0xb0 fs/exec.c:2111
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fce69606ef7
Code: ba 0f 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 63 d8 fb ff 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 90 b8 3b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 01 3f 0f 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdcf9431f8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055f46e209c80 RCX: 00007fce69606ef7
RDX: 000055f46e209cc8 RSI: 000055f46e209c80 RDI: 000055f46e209d58
RBP: 000055f46e209d58 R08: 000055f46e209d5d R09: 00007ffdcf948eb4
R10: 00007fce69805088 R11: 0000000000000246 R12: 000055f46e209cc8
R13: 00007fce697b4904 R14: 000055f46e209cc8 R15: 0000000000000000