INFO: task syz.0.77:6388 blocked for more than 143 seconds. Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.77 state:D stack:20224 pid:6388 tgid:6387 ppid:5817 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5369 [inline] __schedule+0x17fb/0x4be0 kernel/sched/core.c:6756 __schedule_loop kernel/sched/core.c:6833 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6848 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905 rwsem_down_write_slowpath+0xeee/0x13b0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d7/0x220 kernel/locking/rwsem.c:1578 vfs_cmd_reconfigure fs/fsopen.c:261 [inline] vfs_fsconfig_locked fs/fsopen.c:291 [inline] __do_sys_fsconfig fs/fsopen.c:467 [inline] __se_sys_fsconfig+0xb6a/0xf60 fs/fsopen.c:344 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd4f3585d29 RSP: 002b:00007fd4f43dd038 EFLAGS: 00000246 ORIG_RAX: 00000000000001af RAX: ffffffffffffffda RBX: 00007fd4f3775fa0 RCX: 00007fd4f3585d29 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005 RBP: 00007fd4f3601a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd4f3775fa0 R15: 00007ffd9de33798 Showing all locks held in the system: 3 locks held by kworker/u8:1/12: #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline] #0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1840 kernel/workqueue.c:3310 #1: ffffc90000117d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline] #1: ffffc90000117d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1840 kernel/workqueue.c:3310 #2: ffffffff8fca0508 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:281 1 lock held by khungtaskd/30: #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937ae0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744 2 locks held by kworker/u8:3/53: 4 locks held by kworker/u8:6/4520: #0: ffff8880b863e758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:598 #1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987 #2: ffffffff9a5ddcb0 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline] #2: ffffffff9a5ddcb0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1129 #3: ffff888068564178 (&cil->xc_commit_wait){....}-{3:3}, at: __wake_up_common_lock+0x25/0x1e0 kernel/sched/wait.c:105 2 locks held by getty/5571: #0: ffff8880312d30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000331b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by syz.0.77/6388: #0: ffff88806169fc70 (&fc->uapi_mutex){+.+.}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:465 [inline] #0: ffff88806169fc70 (&fc->uapi_mutex){+.+.}-{4:4}, at: __se_sys_fsconfig+0x9b2/0xf60 fs/fsopen.c:344 #1: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: vfs_cmd_reconfigure fs/fsopen.c:261 [inline] #1: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: vfs_fsconfig_locked fs/fsopen.c:291 [inline] #1: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: __do_sys_fsconfig fs/fsopen.c:467 [inline] #1: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: __se_sys_fsconfig+0xb6a/0xf60 fs/fsopen.c:344 3 locks held by syz.0.77/6454: #0: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 #1: ffff888065684398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline] #1: ffff888065684398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline] #1: ffff888065684398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7e1/0xd30 fs/bcachefs/btree_iter.c:3228 #2: ffff8880656a66d0 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x682/0x14e0 fs/bcachefs/btree_update_interior.c:1197 1 lock held by syz-executor/8037: #0: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline] #0: ffffffff8e93cff8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976 1 lock held by syz.0.405/9007: #0: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline] #0: ffff88805f2a60e0 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x27c/0x400 fs/super.c:120 2 locks held by syz-executor/9441: #0: ffffffff8f449e60 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8f449e60 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8f449e60 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x22/0x250 net/core/rtnetlink.c:555 #1: ffffffff8fca0508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #1: ffffffff8fca0508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline] #1: ffffffff8fca0508 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0xbcb/0x2150 net/core/rtnetlink.c:4010 3 locks held by syz.8.443/9471: 1 lock held by dhcpcd-run-hook/9496: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline] watchdog+0xff6/0x1040 kernel/hung_task.c:397 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 69 Comm: kworker/u8:4 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:124 [inline] RIP: 0010:kcov_remote_stop+0x4c/0x6e0 kernel/kcov.c:1007 Code: a9 00 00 ff 00 74 13 48 83 c4 38 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 4c 8b 34 24 41 f7 c6 00 02 00 00 74 05 e8 15 b9 07 00 e8 60 31 21 0a 89 c0 RSP: 0018:ffffc9000159fa88 EFLAGS: 00000246 RAX: 0000000080000000 RBX: ffff88801cf33c00 RCX: ffffffff817b270a RDX: dffffc0000000000 RSI: ffffffff8c0a9760 RDI: ffffffff8c5ed820 RBP: ffff88806119d850 R08: ffffffff942708ff R09: 1ffffffff284e11f R10: dffffc0000000000 R11: fffffbfff284e120 R12: 0000000000000080 R13: ffff8880129a5978 R14: 0000000000000246 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056337e4b2950 CR3: 000000000e736000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_iface_work+0x277/0xf20 net/mac80211/iface.c:1670 cfg80211_wiphy_work+0x2db/0x480 net/wireless/core.c:440 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244