INFO: task syz-executor.3:6551 blocked for more than 143 seconds. Not tainted 6.1.90-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27272 pid:6551 ppid:4930 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5245 [inline] __schedule+0x142d/0x4550 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 d_wait_lookup fs/dcache.c:2626 [inline] d_alloc_parallel+0xbd5/0x1590 fs/dcache.c:2708 __lookup_slow+0x113/0x3d0 fs/namei.c:1675 lookup_slow+0x53/0x70 fs/namei.c:1707 walk_component fs/namei.c:1998 [inline] link_path_walk+0x9d6/0xee0 fs/namei.c:2325 path_openat+0x23d/0x2e60 fs/namei.c:3781 do_filp_open+0x230/0x480 fs/namei.c:3812 do_sys_openat2+0x13b/0x500 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+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f0e1e07dd69 RSP: 002b:00007f0e1edf00c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f0e1e1ac050 RCX: 00007f0e1e07dd69 RDX: 0000000000000002 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f0e1e0ca49e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f0e1e1ac050 R15: 00007ffe66c4d328 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: #0: ffff8880b983aa18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537 #1: ffff8880b9827788 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x43d/0x770 kernel/sched/psi.c:1000 2 locks held by kworker/u4:1/11: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d12ae50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d12b650 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494 2 locks held by getty/3307: #0: ffff888013e66098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188 1 lock held by syz-executor.3/6544: 1 lock held by syz-executor.3/6551: #0: ffff88807031c188 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff88807031c188 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706 1 lock held by syz-executor.2/6660: 1 lock held by syz-executor.2/6661: #0: ffff88807031c6d0 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff88807031c6d0 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706 1 lock held by syz-executor.0/6727: 1 lock held by syz-executor.0/6728: #0: ffff88807031cc18 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff88807031cc18 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706 1 lock held by syz-executor.1/6823: 1 lock held by syz-executor.1/6827: #0: ffff888093848188 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff888093848188 (&type->i_mutex_dir_key#18){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706 2 locks held by syz-executor.1/7933: 2 locks held by syz-executor.2/7936: #0: ffffffff920b7718 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnl_lock net/netfilter/nfnetlink.c:98 [inline] #0: ffffffff920b7718 (nfnl_subsys_ipset){+.+.}-{3:3}, at: nfnetlink_rcv_msg+0xa4a/0x1160 net/netfilter/nfnetlink.c:295 #1: ffffffff8d130140 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x5f0 kernel/rcu/tree.c:4018 2 locks held by syz-executor.4/7953: #0: ffffffff8cfe7f28 (sched_core_mutex){+.+.}-{3:3}, at: sched_core_get+0x49/0x1d0 kernel/sched/core.c:398 #1: ffffffff8d130278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #1: ffffffff8d130278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962 1 lock held by syz-executor.4/7959: 2 locks held by syz-executor.0/7955: #0: ffff88807a7886b8 (&nft_net->commit_mutex){+.+.}-{3:3}, at: nf_tables_valid_genid+0x27/0xa0 net/netfilter/nf_tables_api.c:10140 #1: ffffffff8d130278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #1: ffffffff8d130278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.90-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 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+0xf88/0xfd0 kernel/hung_task.c:377 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 6.1.90-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: events free_obj_work RIP: 0010:unwind_next_frame+0x18a3/0x2220 arch/x86/kernel/unwind_orc.c:605 Code: 28 84 c0 0f 85 a4 08 00 00 49 0f bf 07 49 01 c5 4c 89 e7 4c 89 ee 4c 89 f2 eb 42 49 8d 5e 02 49 83 c6 03 48 89 d8 48 c1 e8 03 <0f> b6 04 28 84 c0 0f 85 96 08 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 RSP: 0018:ffffc90000137600 EFLAGS: 00000a06 RAX: 1ffffffff1de281e RBX: ffffffff8ef140f0 RCX: 0000000000000000 RDX: 0000000000000010 RSI: 0000000000000001 RDI: ffffc90000137740 RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffc90000137730 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900001376e0 R13: ffffffff8ef140f2 R14: ffffffff8ef140f1 R15: ffffc90000137730 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2f821000 CR3: 000000005febb000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] kmem_cache_free+0x292/0x510 mm/slub.c:3683 free_obj_work+0x4fb/0x6d0 lib/debugobjects.c:331 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308