INFO: task syz-executor.5:13253 blocked for more than 143 seconds. Not tainted 6.3.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:21824 pid:13253 ppid:5088 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0x173b/0x4630 kernel/sched/core.c:6625 schedule+0xc3/0x180 kernel/sched/core.c:6701 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306 inode_lock include/linux/fs.h:758 [inline] btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:177 btrfs_sync_file+0x43e/0x10b0 fs/btrfs/file.c:1817 generic_write_sync include/linux/fs.h:2452 [inline] btrfs_do_write_iter+0xccc/0x1270 fs/btrfs/file.c:1684 do_iter_write+0x6ea/0xc50 fs/read_write.c:861 iter_file_splice_write+0x843/0xfe0 fs/splice.c:778 do_splice_from fs/splice.c:856 [inline] direct_splice_actor+0xe7/0x1c0 fs/splice.c:1022 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:977 do_splice_direct+0x283/0x3d0 fs/splice.c:1065 do_sendfile+0x620/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309 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: 0033:0x7fb98128c169 RSP: 002b:00007fb981f43168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fb9813abf80 RCX: 00007fb98128c169 RDX: 0000000000000000 RSI: 000000000000000f RDI: 000000000000000e RBP: 00007fb9812e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201004 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecfc3feaf R14: 00007fb981f43300 R15: 0000000000022000 INFO: task syz-executor.5:13321 blocked for more than 144 seconds. Not tainted 6.3.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:22328 pid:13321 ppid:5088 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0x173b/0x4630 kernel/sched/core.c:6625 schedule+0xc3/0x180 kernel/sched/core.c:6701 wait_on_state fs/btrfs/extent-io-tree.c:707 [inline] wait_extent_bit+0x50c/0x670 fs/btrfs/extent-io-tree.c:751 lock_extent+0x1ce/0x280 fs/btrfs/extent-io-tree.c:1742 btrfs_lock_and_flush_ordered_range+0xd3/0x220 fs/btrfs/ordered-data.c:1047 contiguous_readpages fs/btrfs/extent_io.c:1383 [inline] extent_readahead+0x1075/0x1410 fs/btrfs/extent_io.c:2773 read_pages+0x183/0x830 mm/readahead.c:161 page_cache_ra_unbounded+0x186/0x7c0 mm/readahead.c:242 do_sync_mmap_readahead+0x7b2/0x990 mm/filemap.c:3190 filemap_fault+0x817/0x1800 mm/filemap.c:3282 __do_fault+0x136/0x500 mm/memory.c:4155 do_shared_fault mm/memory.c:4561 [inline] do_fault mm/memory.c:4639 [inline] handle_pte_fault mm/memory.c:4923 [inline] __handle_mm_fault mm/memory.c:5065 [inline] handle_mm_fault+0x20c5/0x51c0 mm/memory.c:5211 do_user_addr_fault arch/x86/mm/fault.c:1407 [inline] handle_page_fault arch/x86/mm/fault.c:1498 [inline] exc_page_fault+0x5b1/0x7c0 arch/x86/mm/fault.c:1554 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0010:copy_user_short_string+0xd/0x40 arch/x86/lib/copy_user_64.S:233 Code: 74 0a 89 d1 f3 a4 89 c8 0f 01 ca c3 89 d0 0f 01 ca c3 01 ca eb e7 0f 1f 80 00 00 00 00 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a RSP: 0018:ffffc90014567550 EFLAGS: 00050202 RAX: ffffffff84304701 RBX: 00007fffffffefc8 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffc90014567600 RDI: 00000000200016e0 RBP: ffffc900145676b0 R08: 0000000000003000 R09: fffff520028acec7 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038 R13: ffffc90014567600 R14: 00000000200016e0 R15: ffffc90014567600 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] _copy_to_user+0xed/0x130 lib/usercopy.c:41 copy_to_user include/linux/uaccess.h:169 [inline] fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:144 emit_last_fiemap_cache fs/btrfs/extent_io.c:3036 [inline] extent_fiemap+0x1bf9/0x2150 fs/btrfs/extent_io.c:3563 btrfs_fiemap+0x178/0x1e0 fs/btrfs/inode.c:7835 ioctl_fiemap fs/ioctl.c:219 [inline] do_vfs_ioctl+0x19ba/0x2b10 fs/ioctl.c:810 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:856 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: 0033:0x7fb98128c169 RSP: 002b:00007fb981f22168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb9813ac050 RCX: 00007fb98128c169 RDX: 00000000200016c0 RSI: 00000000c020660b RDI: 000000000000000e RBP: 00007fb9812e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffecfc3feaf R14: 00007fb981f22300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: #0: ffff8880b993be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539 #1: ffffc900000e7d20 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 4 locks held by kworker/u4:1/11: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8cf25570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffffffff8cf25d70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510 2 locks held by kworker/1:0/22: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc900001c7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:1/26: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90000a1fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 1 lock held by khungtaskd/28: #0: ffffffff8cf253a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4747: #0: ffff88802a7c0098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.0/5102: #0: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #0: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:989 2 locks held by kworker/1:3/5130: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90004befd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:4/5151: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc9000502fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 3 locks held by kworker/1:5/5153: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90005267d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 #2: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #2: ffffffff8cf2a878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:989 2 locks held by kworker/1:6/5154: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90005287d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:7/5156: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc900052a7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:8/5160: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc900052b7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 3 locks held by kworker/u4:7/5204: #0: ffff8880b993be98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:539 #1: ffffc90005477d20 ((work_completion)(&(&forw_packet_aggr->delayed_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 #2: ffff8880b9929598 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999 2 locks held by kworker/1:9/5242: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc900055dfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:11/5418: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90005fafd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:12/5419: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90005ccfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:13/5420: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc900060cfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:14/5733: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc9000b73fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:15/5734: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc9000c0d7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:17/5815: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90014707d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 2 locks held by kworker/1:19/5820: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc900147d7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 1 lock held by kworker/u4:8/6119: 2 locks held by syz-executor.5/13253: #0: ffff88803349a460 (sb_writers#14){.+.+}-{0:0}, at: do_sendfile+0x5fb/0xff0 fs/read_write.c:1254 #1: ffff888038100ef0 (&sb->s_type->i_mutex_key#22){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff888038100ef0 (&sb->s_type->i_mutex_key#22){++++}-{3:3}, at: btrfs_inode_lock+0x4d/0xd0 fs/btrfs/inode.c:177 2 locks held by syz-executor.5/13321: #0: ffff888038100ef0 (&sb->s_type->i_mutex_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline] #0: ffff888038100ef0 (&sb->s_type->i_mutex_key#22){++++}-{3:3}, at: btrfs_inode_lock+0x60/0xd0 fs/btrfs/inode.c:169 #1: ffff888038101090 (mapping.invalidate_lock#5){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:813 [inline] #1: ffff888038101090 (mapping.invalidate_lock#5){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:226 2 locks held by kworker/1:18/15705: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2363 #1: ffffc90005ebfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2365 1 lock held by syz-executor.5/15801: #0: ffff88807486c0e0 (&type->s_umount_key#56/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 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+0x270/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5113 Comm: syz-executor.1 Not tainted 6.3.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:trace_lock_release include/trace/events/lock.h:69 [inline] RIP: 0010:lock_release+0xb8/0x9d0 kernel/locking/lockdep.c:5680 Code: 08 0f 83 d6 05 00 00 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 a8 4a 53 8e be 08 00 00 00 e8 d0 06 76 00 48 0f a3 1d 80 0f e9 0c <73> 0d e8 91 0b 09 00 84 c0 0f 84 d9 05 00 00 48 c7 c0 64 7f 53 8e RSP: 0018:ffffc90004b0f4a0 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff816a3b20 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e534aa8 RBP: ffffc90004b0f5c8 R08: dffffc0000000000 R09: fffffbfff1ca6956 R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000961ea0 R13: ffffffff81e84b00 R14: 1ffffd40001f3d81 R15: dffffc0000000000 FS: 00005555569a1400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0bb6c4000 CR3: 000000002b439000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lruvec_stat_mod_folio include/linux/vmstat.h:609 [inline] filemap_unaccount_folio+0x1e6/0xc70 mm/filemap.c:185 delete_from_page_cache_batch+0x173/0xca0 mm/filemap.c:334 truncate_inode_pages_range+0x346/0x11d0 mm/truncate.c:369 evict_inode_truncate_pages fs/btrfs/inode.c:5182 [inline] btrfs_evict_inode+0x22e/0x1090 fs/btrfs/inode.c:5305 evict+0x2a4/0x620 fs/inode.c:665 dispose_list fs/inode.c:698 [inline] evict_inodes+0x5f8/0x690 fs/inode.c:748 generic_shutdown_super+0x98/0x340 fs/super.c:479 kill_anon_super+0x3b/0x60 fs/super.c:1107 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2133 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1177 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc9f248d5d7 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd75611a78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fc9f248d5d7 RDX: 00007ffd75611b49 RSI: 000000000000000a RDI: 00007ffd75611b40 RBP: 00007ffd75611b40 R08: 00000000ffffffff R09: 00007ffd75611910 R10: 00005555569a2903 R11: 0000000000000246 R12: 00007fc9f24e6cdc R13: 00007ffd75612c00 R14: 00005555569a2810 R15: 00007ffd75612c40