INFO: task kworker/u4:3:48 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/u4:3 state:D stack:22528 pid:48 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-7:1) 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.1:5299 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.1 state:D stack:22264 pid:5299 ppid:5120 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: 0033:0x7f213da8c0c9 RSP: 002b:00007f213e7c0168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f213dbabf80 RCX: 00007f213da8c0c9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f213dae7ae9 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcc61d6b2f R14: 00007f213e7c0300 R15: 0000000000022000 INFO: task syz-executor.1:5332 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.1 state:D stack:26400 pid:5332 ppid:5120 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: 0033:0x7f213da8d5fa RSP: 002b:00007f213e79ef88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f213da8d5fa RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00007f213e79f020 R08: 00007f213e79f020 R09: 0000000001a484bc R10: 0000000001a484bc R11: 0000000000000206 R12: 00000000200000c0 R13: 0000000020000100 R14: 00007f213e79efe0 R15: 00000000200009c0 Showing all locks held in the system: 2 locks held by kworker/u4:1/11: 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/u4:3/48: #0: ffff888017534938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90000b97d20 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:2/897: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90005cc7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by getty/4751: #0: ffff88814be68098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1630 1 lock held by syz-executor.0/5101: #0: ffffffff8cf2c278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x389/0x860 2 locks held by kworker/0:3/5143: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000577fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:4/5161: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000588fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:9/5174: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000592fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:6/5196: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900058efd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 3 locks held by kworker/0:7/5239: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90005b0fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 #2: ffffffff8cf2c278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x458/0x860 4 locks held by syz-executor.1/5299: #0: ffff8880341000e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 #1: ffff888078dc0460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 #2: ffff88807690a400 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: vfs_removexattr+0xec/0x2b0 #3: ffff88807690be80 (&type->i_mutex_dir_key#10/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x4f2/0xdc0 2 locks held by syz-executor.1/5332: #0: ffff888078dc00e0 (&type->s_umount_key#54){++++}-{3:3}, at: path_mount+0xe2a/0x1090 #1: ffff88801f61a7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x26c/0xa60 2 locks held by kworker/0:8/6166: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900177efd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:9/6167: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9001780fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:10/6168: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900177cfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:12/6170: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900178cfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:13/6306: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90017e7fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:14/6426: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000339fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:16/6428: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900033bfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:17/6429: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000336fd20 ((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: 33 Comm: kworker/u4:2 Not tainted 6.2.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0x46b/0x1f80 Code: 12 00 00 44 8b b4 24 d8 00 00 00 48 8b 44 24 08 44 89 20 48 8b 44 24 20 48 8d 5c c6 24 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 <4c> 8b 64 24 18 0f 85 e3 12 00 00 44 89 33 44 89 fb 48 89 d8 48 c1 RSP: 0018:ffffc90000aa7900 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff88801756a7ec RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffff88801756a778 RDI: 00000000000006ca RBP: ffff88801756a75c R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: dffffc0000000001 R12: 00000000000406ca R13: ffff888017569d40 R14: 0000000000000000 R15: 00000000000006ca FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555ae0888 CR3: 000000000cc8e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x20b/0x600 _raw_spin_lock_bh+0x35/0x50 batadv_nc_purge_paths+0xe8/0x3b0 batadv_nc_worker+0x2db/0x580 process_one_work+0x96c/0x13e0 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30