INFO: task syz-executor.3:30105 blocked for more than 143 seconds. Not tainted 6.4.0-rc5-syzkaller-00017-ga27648c74210 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24576 pid:30105 ppid:5014 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804 __mutex_lock_common+0xe33/0x2530 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_get_block+0x280/0x5130 fs/reiserfs/inode.c:680 do_mpage_readpage+0x911/0x1fa0 fs/mpage.c:234 mpage_readahead+0x454/0x930 fs/mpage.c:382 read_pages+0x183/0x830 mm/readahead.c:161 page_cache_ra_unbounded+0x697/0x7c0 mm/readahead.c:270 do_sync_mmap_readahead+0x7b6/0x9a0 mm/filemap.c:3187 filemap_fault+0x81b/0x1810 mm/filemap.c:3279 __do_fault+0x136/0x500 mm/memory.c:4176 do_shared_fault mm/memory.c:4585 [inline] do_fault mm/memory.c:4663 [inline] do_pte_missing mm/memory.c:3647 [inline] handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x2098/0x5860 mm/memory.c:5243 do_user_addr_fault arch/x86/mm/fault.c:1440 [inline] handle_page_fault arch/x86/mm/fault.c:1534 [inline] exc_page_fault+0x7d2/0x910 arch/x86/mm/fault.c:1590 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7f050d02bde9 RSP: 002b:00007fff47179d50 EFLAGS: 00010246 RAX: 0000000020000100 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055555689d2e8 RBP: 00007fff47179e48 R08: 0000000000000000 R09: 0000000000000000 R10: 00007f050cc01648 R11: 0000000000038a8e R12: 0000000000136ebc R13: 00007fff47179e70 R14: 00007fff47179e90 R15: 0000000000000032 INFO: task syz-executor.3:30106 blocked for more than 144 seconds. Not tainted 6.4.0-rc5-syzkaller-00017-ga27648c74210 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:24064 pid:30106 ppid:5014 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 io_schedule+0x8c/0x100 kernel/sched/core.c:8979 folio_wait_bit_common+0x86c/0x12b0 mm/filemap.c:1301 __filemap_get_folio+0x90/0xa00 mm/filemap.c:1931 pagecache_get_page+0x2e/0x220 mm/folio-compat.c:99 find_or_create_page include/linux/pagemap.h:635 [inline] grab_cache_page include/linux/pagemap.h:757 [inline] grab_tail_page fs/reiserfs/inode.c:2199 [inline] reiserfs_truncate_file+0x21b/0x820 fs/reiserfs/inode.c:2267 reiserfs_vfs_truncate_file+0x2d/0x40 fs/reiserfs/file.c:133 reiserfs_direct_IO+0x1e2/0x210 fs/reiserfs/inode.c:3256 generic_file_direct_write+0x208/0x460 mm/filemap.c:3847 __generic_file_write_iter+0x1c8/0x400 mm/filemap.c:4007 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4083 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x790/0xb20 fs/read_write.c:584 ksys_write+0x1a0/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f050d08c169 RSP: 002b:00007f050de43168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f050d1abf80 RCX: 00007f050d08c169 RDX: 0000000000000012 RSI: 00000000200002c0 RDI: 0000000000000004 RBP: 00007f050d0e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff47179d0f R14: 00007f050de43300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:0/10: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cf276f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cf27ab0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/28: #0: ffffffff8cf27520 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4745: #0: ffff88814a963098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176 1 lock held by syz-executor.0/5004: #0: ffffffff8cf2cbf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #0: ffffffff8cf2cbf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992 1 lock held by syz-executor.4/5005: #0: ffff8880546080e0 (&type->s_umount_key#49){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361 2 locks held by kworker/1:3/5010: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000440fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by syz-executor.2/5015: #0: ffff88807fb320e0 (&type->s_umount_key#49){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361 #1: ffffffff8cf2cbf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #1: ffffffff8cf2cbf8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:992 2 locks held by kworker/1:4/5064: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000470fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 4 locks held by kworker/1:7/5067: #0: ffff888012471538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000473fd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 #2: ffff888054afe0e0 (&type->s_umount_key#55){++++}-{3:3}, at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff8880240cd090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 2 locks held by kworker/1:12/6076: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc900165ffd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:15/6080: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9001657fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:16/6081: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9001656fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:17/6145: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9001689fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:19/21070: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000c10fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:20/21071: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000c0ffd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:21/21072: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000c12fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:23/21074: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000c14fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:25/21076: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000c16fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:29/22703: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc900154cfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/1:31/22705: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc900154efd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by syz-executor.3/30105: #0: ffff8880560f5aa0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] #0: ffff8880560f5aa0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:226 #1: ffff8880240cd090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 5 locks held by syz-executor.3/30106: #0: ffff888058203c68 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x254/0x2f0 fs/file.c:1047 #1: ffff888054afe460 (sb_writers#14){.+.+}-{0:0}, at: vfs_write+0x223/0xb20 fs/read_write.c:580 #2: ffff8880560f5900 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff8880560f5900 (&sb->s_type->i_mutex_key#23){+.+.}-{3:3}, at: generic_file_write_iter+0x83/0x310 mm/filemap.c:4080 #3: ffff8880560f56d8 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_vfs_truncate_file+0x20/0x40 fs/reiserfs/file.c:132 #4: ffff8880240cd090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 2 locks held by kworker/1:5/30648: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc90015d3fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 2 locks held by kworker/0:0/31093: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc900188ffd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 1 lock held by syz-executor.1/32158: #0: ffff888028a7c0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228 3 locks held by syz-executor.3/32162: #0: ffff888027d56460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438 #1: ffff88807cf78400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff88807cf78400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_fileattr_set+0x139/0xd40 fs/ioctl.c:681 #2: ffff88802a988b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_write fs/ext4/ext4.h:1703 [inline] #2: ffff88802a988b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ind_migrate+0x26a/0x8d0 fs/ext4/migrate.c:625 2 locks held by syz-executor.3/32180: #0: ffff888027d56460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394 #1: ffff88807cf78400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff88807cf78400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline] #1: ffff88807cf78400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: path_openat+0x7ba/0x3170 fs/namei.c:3788 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc5-syzkaller-00017-ga27648c74210 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xec2/0xf00 kernel/hung_task.c:379 kthread+0x2b8/0x350 kernel/kthread.c:379 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: 32129 Comm: btrfs-fixup Not tainted 6.4.0-rc5-syzkaller-00017-ga27648c74210 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:resched_offsets_ok kernel/sched/core.c:10102 [inline] RIP: 0010:__might_resched+0x16b/0x780 kernel/sched/core.c:10117 Code: 3c 04 00 00 4c 89 e8 48 c1 e8 03 48 ba 00 00 00 00 00 fc ff df 48 89 44 24 38 0f b6 04 10 84 c0 0f 85 83 04 00 00 41 8b 45 00 e0 08 01 d8 44 39 e0 0f 85 d6 00 00 00 44 89 64 24 1c 48 8d bc RSP: 0018:ffffc900163ffb40 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8880287c8000 RDX: dffffc0000000000 RSI: ffff8880287c8000 RDI: ffffffff8b384480 RBP: ffffc900163ffc50 R08: dffffc0000000000 R09: 0000000000000000 R10: ffffc900163ffd20 R11: dffffc0000000001 R12: 0000000000000000 R13: ffff8880287c843c R14: 0000000000000244 R15: 1ffff92002c7ff70 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffed1170d48 CR3: 00000000216c2000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mutex_lock_common+0xda/0x2530 kernel/locking/mutex.c:580 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799 set_pf_worker kernel/workqueue.c:2474 [inline] rescuer_thread+0xeb1/0xf50 kernel/workqueue.c:2709 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308