INFO: task syz.0.1757:15874 blocked for more than 143 seconds. Not tainted 6.14.0-rc3-syzkaller-00012-g2408a807bfc3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1757 state:D stack:23872 pid:15874 tgid:15874 ppid:14410 task_flags:0x440040 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5378 [inline] __schedule+0x190e/0x4c90 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6857 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 do_sync_mmap_readahead+0x4a6/0x990 filemap_fault+0x89e/0x16c0 mm/filemap.c:3447 __do_fault+0x135/0x390 mm/memory.c:4977 do_shared_fault mm/memory.c:5456 [inline] do_fault mm/memory.c:5530 [inline] do_pte_missing mm/memory.c:4047 [inline] handle_pte_fault mm/memory.c:5889 [inline] __handle_mm_fault+0x220a/0x70f0 mm/memory.c:6032 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6201 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline] handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fdccbb54b6d RSP: 002b:00007fdccbecfb88 EFLAGS: 00010287 RAX: 0000400000000200 RBX: 0000000000000004 RCX: ffffffffffffffab RDX: 0000000000000054 RSI: 00007fdccb600187 RDI: 0000400000000200 RBP: 00007fdccbda7ba0 R08: 00007fdccba00000 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000001 R12: 00007fdccbda5fac R13: 00007fdccbecfc80 R14: fffffffffffffffe R15: 00007fdccbecfca0 INFO: task syz.0.1757:15876 blocked for more than 144 seconds. Not tainted 6.14.0-rc3-syzkaller-00012-g2408a807bfc3 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.1757 state:D stack:24960 pid:15876 tgid:15874 ppid:14410 task_flags:0x440040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5378 [inline] __schedule+0x190e/0x4c90 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6857 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914 rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline] __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x705/0xa40 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 do_sync_mmap_readahead+0x4a6/0x990 filemap_fault+0x89e/0x16c0 mm/filemap.c:3447 __do_fault+0x135/0x390 mm/memory.c:4977 do_read_fault mm/memory.c:5392 [inline] do_fault mm/memory.c:5526 [inline] do_pte_missing mm/memory.c:4047 [inline] handle_pte_fault mm/memory.c:5889 [inline] __handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6032 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6201 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x1a92/0x4140 mm/gup.c:1491 populate_vma_page_range+0x264/0x330 mm/gup.c:1929 __mm_populate+0x27a/0x460 mm/gup.c:2032 do_mlock+0x6cc/0x850 mm/mlock.c:653 __do_sys_mlock mm/mlock.c:661 [inline] __se_sys_mlock mm/mlock.c:659 [inline] __x64_sys_mlock+0x60/0x70 mm/mlock.c:659 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdccbb8cde9 RSP: 002b:00007fdccc956038 EFLAGS: 00000246 ORIG_RAX: 0000000000000095 RAX: ffffffffffffffda RBX: 00007fdccbda5fa0 RCX: 00007fdccbb8cde9 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 000040000086b000 RBP: 00007fdccbc0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fdccbda5fa0 R15: 00007fdccbecfa28 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8eb38f60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746 3 locks held by kworker/1:1/51: #0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline] #0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317 #1: ffffc90000bb7c60 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline] #1: ffffc90000bb7c60 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317 #2: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline] #2: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996 2 locks held by getty/5591: #0: ffff888035a4a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211 3 locks held by kworker/1:6/5896: 1 lock held by udevd/5932: 1 lock held by syz.3.1567/14705: 1 lock held by syz.0.1757/15874: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz.0.1757/15876: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz.2.1814/16282: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz.6.1857/16588: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz.6.1857/16589: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz-executor/16699: 1 lock held by syz.1.1887/16720: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz.1.1887/16721: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 1 lock held by syz.1.1887/16722: #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #0: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229 3 locks held by kworker/u8:15/17347: 1 lock held by syz-executor/17391: 2 locks held by syz.3.2046/17752: #0: ffff8880358ad220 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:717 [inline] #0: ffff8880358ad220 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6367 #1: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #1: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0xb5f/0x16c0 mm/filemap.c:3454 2 locks held by syz.0.2102/18151: #0: ffff88807a40bb68 (&vma->vm_lock->lock){++++}-{4:4}, at: vma_start_read include/linux/mm.h:717 [inline] #0: ffff88807a40bb68 (&vma->vm_lock->lock){++++}-{4:4}, at: lock_vma_under_rcu+0x34b/0x790 mm/memory.c:6367 #1: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #1: ffff888148c87c40 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0xb5f/0x16c0 mm/filemap.c:3454 1 lock held by syz-executor/18438: 4 locks held by syz.9.2143/18500: #0: ffff88803d588d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:480 [inline] #0: ffff88803d588d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x203/0x510 net/bluetooth/hci_core.c:2677 #1: ffff88803d588078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x60d/0x1260 net/bluetooth/hci_sync.c:5185 #2: ffff888053b37b38 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x71/0x690 net/bluetooth/l2cap_core.c:1760 #3: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:334 [inline] #3: ffffffff8eb3e438 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:996 1 lock held by dhcpcd/18514: #0: ffff88805ca92008 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline] #0: ffff88805ca92008 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release net/socket.c:646 [inline] #0: ffff88805ca92008 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: sock_close+0x90/0x240 net/socket.c:1398 1 lock held by dhcpcd-run-hook/18534: #0: ffff8880b863e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc3-syzkaller-00012-g2408a807bfc3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline] watchdog+0x1058/0x10a0 kernel/hung_task.c:399 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1150 Comm: kworker/u8:6 Not tainted 6.14.0-rc3-syzkaller-00012-g2408a807bfc3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: bat_events batadv_nc_worker RIP: 0010:hlock_class kernel/locking/lockdep.c:230 [inline] RIP: 0010:mark_lock+0xa2/0x360 kernel/locking/lockdep.c:4729 Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 40 68 54 94 be 08 00 00 00 e8 16 d7 8b 00 48 0f a3 1d de 41 b7 12 <73> 10 48 69 c3 c8 00 00 00 48 8d 98 00 e7 eb 93 eb 68 48 c7 c0 80 RSP: 0018:ffffc9000430f7a8 EFLAGS: 00000057 RAX: 0000000000000001 RBX: 0000000000000021 RCX: ffffffff819d265a RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff94546840 RBP: 0000000000000009 R08: ffffffff94546847 R09: 1ffffffff28a8d08 R10: dffffc0000000000 R11: fffffbfff28a8d09 R12: ffff888027a28ad4 R13: dffffc0000000000 R14: 0000000000000200 R15: ffff888027a28b40 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f74144ee3b0 CR3: 000000005cd00000 CR4: 00000000003526f0 Call Trace: mark_usage kernel/locking/lockdep.c:4672 [inline] __lock_acquire+0xc3e/0x2100 kernel/locking/lockdep.c:5182 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 rcu_lock_acquire include/linux/rcupdate.h:337 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] batadv_nc_process_nc_paths+0xd6/0x3a0 net/batman-adv/network-coding.c:687 batadv_nc_worker+0x42a/0x610 net/batman-adv/network-coding.c:728 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317 worker_thread+0x870/0xd30 kernel/workqueue.c:3398 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244