INFO: task kworker/u4:8:6144 blocked for more than 143 seconds. Not tainted 6.2.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:8 state:D stack:20064 pid:6144 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-7:4) Call Trace: __schedule+0x13ca/0x43c0 schedule+0xc3/0x190 queue_log_writer+0x21d/0x310 do_journal_end+0x985/0x4880 reiserfs_write_inode+0x1fd/0x2a0 __writeback_single_inode+0x7f9/0x1550 writeback_sb_inodes+0x965/0x13b0 wb_writeback+0x4db/0x1040 wb_workfn+0x470/0x1110 process_one_work+0x96c/0x13e0 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30 INFO: task syz-executor.4:25423 blocked for more than 143 seconds. Not tainted 6.2.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:22424 pid:25423 ppid:5112 flags:0x00004006 Call Trace: __schedule+0x13ca/0x43c0 schedule+0xc3/0x190 bit_wait+0x12/0xc0 __wait_on_bit+0xb7/0x170 inode_wait_for_writeback+0x222/0x2d0 evict+0x277/0x620 reiserfs_xattr_set_handle+0xa38/0xdc0 reiserfs_xattr_set+0x428/0x550 __vfs_removexattr+0x422/0x460 __vfs_removexattr_locked+0x202/0x410 vfs_removexattr+0x103/0x2b0 ovl_get_workdir+0xddf/0x16c0 ovl_fill_super+0x1b8a/0x29c0 mount_nodev+0x56/0xe0 legacy_get_tree+0xef/0x190 vfs_get_tree+0x8c/0x270 do_new_mount+0x28f/0xae0 __se_sys_mount+0x2c9/0x3b0 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f27a328c0c9 RSP: 002b:00007f27a3fde168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f27a33abf80 RCX: 00007f27a328c0c9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f27a32e7ae9 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe98aa16bf R14: 00007f27a3fde300 R15: 0000000000022000 INFO: task syz-executor.4:25440 blocked for more than 144 seconds. Not tainted 6.2.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27976 pid:25440 ppid:5112 flags:0x00004004 Call Trace: __schedule+0x13ca/0x43c0 schedule+0xc3/0x190 wb_wait_for_completion+0x154/0x280 sync_inodes_sb+0x28b/0xa60 sync_filesystem+0x16f/0x220 reiserfs_remount+0x1af/0x19f0 reconfigure_super+0x3c9/0x7c0 path_mount+0xe6d/0x1090 __se_sys_mount+0x2c9/0x3b0 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f27a328d5fa RSP: 002b:00007f27a3f9bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f27a328d5fa RDX: 00000000200001c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00007f27a3f9c020 R08: 00007f27a3f9c020 R09: 0000000001a484bc R10: 0000000001a484bc R11: 0000000000000202 R12: 00000000200001c0 R13: 0000000020000100 R14: 00007f27a3f9bfe0 R15: 00000000200004c0 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8cf26e10 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 1 lock held by rcu_tasks_trace/13: #0: ffffffff8cf27610 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0 2 locks held by kworker/0:1/14: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90000137d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 1 lock held by khungtaskd/28: #0: ffffffff8cf26c40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/0:2/898: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90004e1fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:3/4734: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000366fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by getty/4749: #0: ffff888027625098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1630 2 locks held by syz-executor.1/5098: #0: ffff8880872560e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xad/0xf0 #1: ffffffff8cf2c278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x458/0x860 2 locks held by syz-executor.3/5127: #0: ffff888021ce40e0 (&type->s_umount_key#53){++++}-{3:3}, at: deactivate_super+0xad/0xf0 #1: ffffffff8cf2c278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x389/0x860 2 locks held by kworker/0:5/5159: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900045ffd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:7/5163: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000494fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:9/5314: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90004d57d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:9/5389: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900050afd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:11/5392: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000569fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:13/5400: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000580fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/u4:8/6144: #0: ffff888017502938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900032c7d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:14/7167: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900039dfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:16/8077: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90003597d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:17/8078: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9001672fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:18/8619: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90014d47d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:12/18073: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90005f7fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 4 locks held by syz-executor.4/25423: #0: ffff88807d7c40e0 (&type->s_umount_key#52/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 #1: ffff88807e90c460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 #2: ffff888073793e80 (&type->i_mutex_dir_key#11){++++}-{3:3}, at: vfs_removexattr+0xec/0x2b0 #3: ffff888073794bc0 (&type->i_mutex_dir_key#11/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x4f2/0xdc0 2 locks held by syz-executor.4/25440: #0: ffff88807e90c0e0 (&type->s_umount_key#53){++++}-{3:3}, at: path_mount+0xe2a/0x1090 #1: ffff888146dc87d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26c/0xa60 2 locks held by kworker/0:4/28109: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90015877d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: dump_stack_lvl+0x1b5/0x2a0 nmi_cpu_backtrace+0x47b/0x500 nmi_trigger_cpumask_backtrace+0x1d3/0x430 watchdog+0xf70/0xfb0 kthread+0x270/0x300 ret_from_fork+0x1f/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1216 Comm: kworker/u4:6 Not tainted 6.2.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy6 ieee80211_iface_work RIP: 0010:sta_info_get+0xc5/0x210 Code: 00 00 48 c7 c2 00 46 f0 8b e8 27 98 5b f7 49 81 c4 b0 09 00 00 48 8b 05 29 94 e1 01 48 8b 0d 1a 94 e1 01 48 8b 15 0b 94 e1 01 <48> 8b 1d fc 93 e1 01 4c 8b 05 ed 93 e1 01 4c 89 e7 4c 89 fe 50 51 RSP: 0018:ffffc90005d5f8d0 EFLAGS: 00000286 RAX: 0000000000000000 RBX: ffff888031f91590 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b39db20 RDI: ffffffff8b39dae0 RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff2043c31 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888075f69790 R13: ffff888075f6b638 R14: ffff888031f90c80 R15: ffff88801bff945a FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d7a6d6000 CR3: 000000000cc8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_ibss_rx_queued_mgmt+0x1328/0x2fb0 ieee80211_iface_work+0x7bd/0xd00 process_one_work+0x96c/0x13e0 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30