INFO: task syz-executor.2:12606 blocked for more than 143 seconds.
Not tainted 6.9.0-syzkaller-08995-g0450d2083be6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29504 pid:12606 tgid:12597 ppid:11909 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5408 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6745
__schedule_loop kernel/sched/core.c:6822 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6837
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
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+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:801 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2469 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2493
filename_lookup+0x1e5/0x5b0 fs/namei.c:2522
do_linkat+0x140/0x5e0 fs/namei.c:4663
__do_sys_link fs/namei.c:4717 [inline]
__se_sys_link fs/namei.c:4715 [inline]
__x64_sys_link+0x81/0xa0 fs/namei.c:4715
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd5b6e7cee9
RSP: 002b:00007fd5b7b6b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fd5b6fac120 RCX: 00007fd5b6e7cee9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000020000240
RBP: 00007fd5b6ec949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fd5b6fac120 R15: 00007ffe0f3d4aa8
Showing all locks held in the system:
7 locks held by kworker/1:0/25:
1 lock held by khungtaskd/30:
#0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8dbb1760 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
6 locks held by kworker/u8:4/62:
2 locks held by kworker/u8:7/1100:
2 locks held by getty/4840:
#0: ffff88802b2650a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/0:5/5160:
#0: ffff888015480948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12bf/0x1b60 kernel/workqueue.c:3206
#1: ffffc90004607d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x957/0x1b60 kernel/workqueue.c:3207
#2: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
1 lock held by syz-executor.1/7330:
1 lock held by syz-executor.1/7795:
2 locks held by kworker/u8:0/11426:
#0: ffff8880b923ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffff8880b9228a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988
2 locks held by syz-executor.2/12599:
1 lock held by syz-executor.2/12606:
#0: ffff88804dd78188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:801 [inline]
#0: ffff88804dd78188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88804dd78188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
3 locks held by kworker/u9:2/13539:
2 locks held by syz-executor.2/13572:
1 lock held by syz-executor.0/13573:
#0: ffffffff8dbbcef8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:323
1 lock held by syz-executor.3/13578:
#0: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by syz-executor.4/13581:
#0: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by syz-executor.1/13582:
#0: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f745aa8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.9.0-syzkaller-08995-g0450d2083be6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
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 PID: 1100 Comm: kworker/u8:7 Not tainted 6.9.0-syzkaller-08995-g0450d2083be6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events_unbound bpf_map_free_deferred
RIP: 0010:stack_trace_consume_entry+0xd7/0x170 kernel/stacktrace.c:93
Code: 02 00 0f 85 9a 00 00 00 8d 45 01 89 43 10 48 8b 03 48 8d 2c e8 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <75> 64 48 89 75 00 8b 43 08 39 43 10 0f 92 c0 48 83 c4 08 5b 5d c3
RSP: 0018:ffffc90004e9f8c0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc90004e9f9a8 RCX: ffffffff8134243e
RDX: 1ffff920009d3f4b RSI: ffffffff81585c6b RDI: ffffc90004e9f9b4
RBP: ffffc90004e9fa58 R08: 0000000000000007 R09: 0000000000000000
R10: ffffffff81585c6b R11: 0000000000000002 R12: ffffc90004e9f8e8
R13: ffffffff817989f0 R14: ffffc90004e9f9a8 R15: ffff8880227c1e00
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d825000 CR3: 0000000062cde000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0xe1/0x170 arch/x86/kernel/stacktrace.c:27
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:302
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
bpf_ringbuf_free kernel/bpf/ringbuf.c:223 [inline]
ringbuf_map_free+0xd7/0x130 kernel/bpf/ringbuf.c:232
bpf_map_free_deferred+0x1ce/0x420 kernel/bpf/syscall.c:746
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244