INFO: task syz-executor.0:13713 blocked for more than 143 seconds. Not tainted 6.2.0-rc6-syzkaller-00239-g0136d86b7852 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:25304 pid:13713 ppid:7944 flags:0x00004004 Call Trace: __schedule+0x13ca/0x43c0 schedule+0xc3/0x190 io_schedule+0x8c/0x100 folio_wait_bit_common+0x7fe/0x1210 btrfs_page_mkwrite+0x41e/0xc90 do_page_mkwrite+0x1a1/0x600 do_wp_page+0x506/0x3270 handle_mm_fault+0x2388/0x51c0 exc_page_fault+0x66a/0x880 asm_exc_page_fault+0x26/0x30 RIP: 0033:0x7f259b686c25 RSP: 002b:00007fffaf421d18 EFLAGS: 00010202 RAX: 00000000200001c0 RBX: 0000000000000000 RCX: 0000000000676f6c RDX: 0000000000000005 RSI: 00000000676f6c2e RDI: 00000000200001c0 RBP: 00007fffaf421dd8 R08: 00007f259b600000 R09: 00007f259b200000 R10: 00007f259b206288 R11: 000000000001caf4 R12: 00000000000988a0 R13: 00007fffaf421e00 R14: 00007fffaf421e20 R15: 0000000000000032 INFO: task syz-executor.0:13779 blocked for more than 144 seconds. Not tainted 6.2.0-rc6-syzkaller-00239-g0136d86b7852 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24584 pid:13779 ppid:7944 flags:0x00004004 Call Trace: __schedule+0x13ca/0x43c0 schedule+0xc3/0x190 wait_extent_bit+0x50c/0x6a0 lock_extent+0x1bb/0x270 btrfs_page_mkwrite+0x536/0xc90 do_page_mkwrite+0x1a1/0x600 do_wp_page+0x506/0x3270 handle_mm_fault+0x2388/0x51c0 exc_page_fault+0x66a/0x880 asm_exc_page_fault+0x26/0x30 RIP: 0010:copy_user_short_string+0xd/0x40 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:ffffc90008597330 EFLAGS: 00050202 RAX: ffffffff8435f301 RBX: 00007fffffffefc8 RCX: 0000000000000007 RDX: 0000000000000000 RSI: ffffc900085973e0 RDI: 0000000020000120 RBP: ffffc90008597488 R08: 0000000000000000 R09: fffff520010b2e83 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000038 R13: ffffc900085973e0 R14: 0000000020000120 R15: ffffc900085973e0 _copy_to_user+0xed/0x130 fiemap_fill_next_extent+0x235/0x410 emit_fiemap_extent+0x242/0x3f0 fiemap_process_hole+0xa71/0xb40 extent_fiemap+0xe42/0x2100 btrfs_fiemap+0x178/0x1e0 do_vfs_ioctl+0x194f/0x2a40 __se_sys_ioctl+0x81/0x160 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f259b68c0c9 RSP: 002b:00007f259c441168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f259b7ac120 RCX: 00007f259b68c0c9 RDX: 0000000020000100 RSI: 00000000c020660b RDI: 0000000000000005 RBP: 00007f259b6e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffaf421c9f R14: 00007f259c441300 R15: 0000000000022000 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 1 lock held by khungtaskd/28: #0: ffffffff8cf26c40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4751: #0: ffff888149dd2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1630 1 lock held by syz-executor.5/5102: #0: ffffffff8cf2c278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x458/0x860 1 lock held by syz-executor.1/5104: #0: ffff88803c4320e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xad/0xf0 2 locks held by syz-executor.3/5118: #0: ffff8880325f20e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xad/0xf0 #1: ffffffff8cf2c278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x389/0x860 1 lock held by syz-executor.4/5120: #0: ffff88802fdfc0e0 (&type->s_umount_key#56){++++}-{3:3}, at: deactivate_super+0xad/0xf0 2 locks held by kworker/1:5/5161: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000472fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:6/5162: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000473fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:7/5163: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000474fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:8/5165: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000476fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:13/5472: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000508fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:11/5649: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90006497d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:12/5650: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90005fe7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:13/5651: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900063b7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:14/5653: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90007c87d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:15/5654: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc90007c97d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:16/5907: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000bd2fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:17/5908: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000bd3fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:18/8358: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000550fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/1:19/9498: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc9000332fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 2 locks held by kworker/0:21/9948: #0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7eb/0x13e0 #1: ffffc900056e7d20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x835/0x13e0 3 locks held by syz-executor.0/13713: #0: ffff88807de735d8 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18d/0x880 #1: ffff88802a42c558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 #2: ffff888076e75b08 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x416/0xc90 3 locks held by syz-executor.0/13779: #0: ffff88807de735d8 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x18d/0x880 #1: ffff88802a42c558 (sb_pagefaults#2){.+.+}-{0:0}, at: do_page_mkwrite+0x1a1/0x600 #2: ffff888076e75b08 (&ei->i_mmap_lock){++++}-{3:3}, at: btrfs_page_mkwrite+0x416/0xc90 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc6-syzkaller-00239-g0136d86b7852 #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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5566 Comm: kworker/u4:10 Not tainted 6.2.0-rc6-syzkaller-00239-g0136d86b7852 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:lock_release+0x51/0xa70 Code: 04 25 28 00 00 00 48 89 84 24 e0 00 00 00 49 bf 00 00 00 00 00 fc ff df 48 c7 44 24 60 b3 8a b5 41 48 c7 44 24 68 b6 57 85 8c <48> c7 44 24 70 e0 0f 6a 81 4c 8d 74 24 60 49 c1 ee 03 48 b8 f1 f1 RSP: 0018:ffffc90006457ac0 EFLAGS: 00000286 RAX: 38ff0213882ea000 RBX: 0000000000000000 RCX: ffff888079cf1d40 RDX: 0000000000000000 RSI: ffffffff8a6806b5 RDI: ffffffff8cf26c40 RBP: ffffc90006457be8 R08: dffffc0000000000 R09: fffffbfff2043c31 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000231 R13: ffffffff8a6806b5 R14: ffff888029914c80 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0185d0c80 CR3: 000000000cc8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: batadv_nc_worker+0x211/0x580 process_one_work+0x96c/0x13e0 worker_thread+0xa63/0x1210 kthread+0x270/0x300 ret_from_fork+0x1f/0x30