INFO: task kworker/u4:7:2865 blocked for more than 143 seconds. Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:7 state:D stack:17056 pid:2865 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-7:5) Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 queue_log_writer+0x215/0x300 fs/reiserfs/journal.c:2980 check_journal_end fs/reiserfs/journal.c:3676 [inline] do_journal_end+0xa38/0x4a30 fs/reiserfs/journal.c:4042 reiserfs_write_inode+0x1f8/0x2a0 fs/reiserfs/inode.c:1779 write_inode fs/fs-writeback.c:1451 [inline] __writeback_single_inode+0x4d6/0x670 fs/fs-writeback.c:1663 writeback_sb_inodes+0x812/0x1050 fs/fs-writeback.c:1889 wb_writeback+0x41f/0x7b0 fs/fs-writeback.c:2063 wb_do_writeback fs/fs-writeback.c:2206 [inline] wb_workfn+0x3cb/0xef0 fs/fs-writeback.c:2246 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.5:16753 blocked for more than 143 seconds. Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:19288 pid:16753 ppid:5108 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 bit_wait+0xe/0xc0 kernel/sched/wait_bit.c:199 __wait_on_bit+0xb5/0x170 kernel/sched/wait_bit.c:49 __inode_wait_for_writeback fs/fs-writeback.c:1472 [inline] inode_wait_for_writeback+0x211/0x2c0 fs/fs-writeback.c:1484 evict+0x277/0x620 fs/inode.c:661 xattr_unlink fs/reiserfs/xattr.c:96 [inline] lookup_and_delete_xattr fs/reiserfs/xattr.c:494 [inline] reiserfs_xattr_set_handle+0xae5/0xec0 fs/reiserfs/xattr.c:529 reiserfs_xattr_set+0x417/0x530 fs/reiserfs/xattr.c:633 __vfs_removexattr+0x44a/0x480 fs/xattr.c:497 __vfs_removexattr_locked+0x1fe/0x400 fs/xattr.c:532 vfs_removexattr+0x104/0x2b0 fs/xattr.c:554 ovl_do_removexattr fs/overlayfs/overlayfs.h:272 [inline] ovl_removexattr fs/overlayfs/overlayfs.h:280 [inline] ovl_make_workdir+0x5b9/0xdf0 fs/overlayfs/super.c:1361 ovl_get_workdir+0x2e4/0x410 fs/overlayfs/super.c:1444 ovl_fill_super+0x19d7/0x2790 fs/overlayfs/super.c:2000 mount_nodev+0x52/0xe0 fs/super.c:1405 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1489 do_new_mount+0x289/0xad0 fs/namespace.c:3145 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc88468c0c9 RSP: 002b:00007fc885323168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fc8847abf80 RCX: 00007fc88468c0c9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007fc8846e7ae9 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffbec4dc8f R14: 00007fc885323300 R15: 0000000000022000 INFO: task syz-executor.5:16760 blocked for more than 144 seconds. Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24392 pid:16760 ppid:5108 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6606 schedule+0xcb/0x190 kernel/sched/core.c:6682 wb_wait_for_completion+0x155/0x280 fs/fs-writeback.c:192 sync_inodes_sb+0x283/0xaa0 fs/fs-writeback.c:2725 sync_filesystem+0x16b/0x220 fs/sync.c:64 reiserfs_remount+0x1a9/0x19d0 fs/reiserfs/super.c:1445 reconfigure_super+0x3bc/0x7b0 fs/super.c:935 do_remount fs/namespace.c:2807 [inline] path_mount+0xd20/0x10c0 fs/namespace.c:3467 do_mount fs/namespace.c:3488 [inline] __do_sys_mount fs/namespace.c:3697 [inline] __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc88468d5fa RSP: 002b:00007fc885301f88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc88468d5fa RDX: 00000000200001c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00007fc885302020 R08: 00007fc885302020 R09: 0000000001a484bc R10: 0000000001a484bc R11: 0000000000000206 R12: 00000000200001c0 R13: 0000000020000100 R14: 00007fc885301fe0 R15: 00000000200004c0 Showing all locks held in the system: 3 locks held by kworker/u4:1/11: #0: ffff8880b983a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537 #1: ffffc90000107d00 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264 #2: ffff8880b9828558 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:999 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d327010 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d327810 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8d326e40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/u4:7/2865: #0: ffff888017b3c938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0 #1: ffffc9000bca7d00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264 2 locks held by getty/4758: #0: ffff88814a105098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 4 locks held by kworker/1:6/5163: #0: ffff8880b993a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537 #1: ffff8880b9927748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x611/0x9a0 kernel/sched/psi.c:976 #2: ffff8880b9928558 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x12a/0x270 kernel/time/timer.c:999 #3: ffffffff922f6518 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x96/0x6e0 lib/debugobjects.c:665 4 locks held by syz-executor.5/16753: #0: ffff8880766080e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x212/0x920 fs/super.c:228 #1: ffff888028e44460 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508 #2: ffff888043706ce0 (&type->i_mutex_dir_key#20){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #2: ffff888043706ce0 (&type->i_mutex_dir_key#20){++++}-{3:3}, at: vfs_removexattr+0xed/0x2b0 fs/xattr.c:553 #3: ffff8880410f8980 (&type->i_mutex_dir_key#20/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #3: ffff8880410f8980 (&type->i_mutex_dir_key#20/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:486 [inline] #3: ffff8880410f8980 (&type->i_mutex_dir_key#20/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x521/0xec0 fs/reiserfs/xattr.c:529 2 locks held by syz-executor.5/16760: #0: ffff888028e440e0 (&type->s_umount_key#101){++++}-{3:3}, at: do_remount fs/namespace.c:2804 [inline] #0: ffff888028e440e0 (&type->s_umount_key#101){++++}-{3:3}, at: path_mount+0xcd8/0x10c0 fs/namespace.c:3467 #1: ffff88801eb967d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff88801eb967d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x264/0xaa0 fs/fs-writeback.c:2723 1 lock held by syz-executor.2/17737: #0: ffff888028e440e0 (&type->s_umount_key#101){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 1 lock held by syz-executor.2/17754: #0: ffff888028e440e0 (&type->s_umount_key#101){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 1 lock held by syz-executor.2/17756: #0: ffff888028e440e0 (&type->s_umount_key#101){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1ba/0x420 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+0xcd5/0xd20 kernel/hung_task.c:377 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 17411 Comm: kworker/u4:5 Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy13 ieee80211_iface_work RIP: 0010:__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] RIP: 0010:_raw_spin_lock_irqsave+0x89/0x100 kernel/locking/spinlock.c:162 Code: 89 04 3b 9c 8f 44 24 20 48 89 f8 48 c1 e8 03 42 80 3c 38 00 74 05 e8 96 a2 26 f7 4c 8b 64 24 20 fa 41 f7 c4 00 02 00 00 74 05 b2 9f d7 f6 bf 01 00 00 00 e8 58 e8 a3 f6 49 8d 7e 18 31 f6 31 RSP: 0018:ffffc9000abc7040 EFLAGS: 00000006 RAX: 1ffff92001578e0c RBX: 1ffff92001578e08 RCX: 1ffffffff15de432 RDX: 0000000000000000 RSI: ffffffff8aef2180 RDI: ffffc9000abc7060 RBP: ffffc9000abc70d8 R08: ffffffff8a0fb4eb R09: ffffffff8a104b15 R10: 0000000000000002 R11: ffff8880254557c0 R12: 0000000000000a02 R13: dffffc0000000000 R14: ffffffff9223d9a0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c01323f000 CR3: 000000000d08e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: debug_object_activate+0x96/0x6e0 lib/debugobjects.c:665 debug_rcu_head_queue kernel/rcu/rcu.h:189 [inline] kvfree_call_rcu+0xb3/0x880 kernel/rcu/tree.c:3367 cfg80211_update_known_bss+0x16a/0x9e0 cfg80211_bss_update+0x175/0x20b0 net/wireless/scan.c:1728 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2492 [inline] cfg80211_inform_bss_frame_data+0x97b/0x2230 net/wireless/scan.c:2525 ieee80211_bss_info_update+0x74f/0x1020 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1945/0x2c40 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1583 [inline] ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1637 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308