INFO: task syz-executor.2:4817 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:24912 pid: 4817 ppid: 4528 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6537 __mutex_lock_common+0xcfc/0x2400 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 filemap_read_page+0x17b/0x4c0 mm/filemap.c:2386 filemap_update_page mm/filemap.c:2464 [inline] filemap_get_pages mm/filemap.c:2574 [inline] filemap_read+0x146e/0x2540 mm/filemap.c:2634 call_read_iter include/linux/fs.h:2167 [inline] generic_file_splice_read+0x3ef/0x5f0 fs/splice.c:311 do_splice_to fs/splice.c:807 [inline] splice_direct_to_actor+0x423/0xc10 fs/splice.c:881 do_splice_direct+0x1d4/0x2f0 fs/splice.c:1008 do_sendfile+0x5fc/0xeb0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x141/0x1a0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f65fe9e43b9 RSP: 002b:00007f65fdd740b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f65feb21f80 RCX: 00007f65fe9e43b9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f65fea45498 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f65feb21f80 R15: 00007ffeeb9db658 INFO: task syz-executor.2:4837 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:25456 pid: 4837 ppid: 4528 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 wait_on_page_bit_common+0x83b/0xe50 mm/filemap.c:1356 __lock_page mm/filemap.c:1648 [inline] lock_page include/linux/pagemap.h:625 [inline] pagecache_get_page+0x504/0xf10 mm/filemap.c:1910 find_or_create_page include/linux/pagemap.h:420 [inline] ni_readpage_cmpr+0x2c6/0x890 fs/ntfs3/frecord.c:2114 ntfs_readpage+0x189/0x200 fs/ntfs3/inode.c:728 filemap_read_page+0x17b/0x4c0 mm/filemap.c:2386 filemap_create_page mm/filemap.c:2506 [inline] filemap_get_pages mm/filemap.c:2558 [inline] filemap_read+0xe9a/0x2540 mm/filemap.c:2634 call_read_iter include/linux/fs.h:2167 [inline] generic_file_splice_read+0x3ef/0x5f0 fs/splice.c:311 do_splice_to fs/splice.c:807 [inline] splice_direct_to_actor+0x423/0xc10 fs/splice.c:881 do_splice_direct+0x1d4/0x2f0 fs/splice.c:1008 do_sendfile+0x5fc/0xeb0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x141/0x1a0 fs/read_write.c:1303 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f65fe9e43b9 RSP: 002b:00007f65fdd530b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f65feb22050 RCX: 00007f65fe9e43b9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007f65fea45498 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f65feb22050 R15: 00007ffeeb9db658 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c31eaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by klogd/3550: #0: ffff8880b903a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475 2 locks held by getty/3951: #0: ffff88807f959098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158 3 locks held by syz-executor.2/4817: #0: ffff888061d66460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5d9/0xeb0 fs/read_write.c:1248 #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_read+0x94f/0x2540 mm/filemap.c:2634 #2: ffff888073bcb4a0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff888073bcb4a0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 3 locks held by syz-executor.2/4837: #0: ffff888061d66460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5d9/0xeb0 fs/read_write.c:1248 #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_create_page mm/filemap.c:2498 [inline] #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2558 [inline] #1: ffff888073bcb8e0 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_read+0xc0a/0x2540 mm/filemap.c:2634 #2: ffff888073bcb4a0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff888073bcb4a0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 3 locks held by syz-executor.0/5394: #0: ffff88802a886460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5d9/0xeb0 fs/read_write.c:1248 #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_read+0x94f/0x2540 mm/filemap.c:2634 #2: ffff8880676ebc00 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff8880676ebc00 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 3 locks held by syz-executor.0/5402: #0: ffff88802a886460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5d9/0xeb0 fs/read_write.c:1248 #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] #1: ffff8880676ec040 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_read+0x94f/0x2540 mm/filemap.c:2634 #2: ffff8880676ebc00 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff8880676ebc00 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 3 locks held by syz-executor.4/6464: #0: ffff888022c7c460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5d9/0xeb0 fs/read_write.c:1248 #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_read+0x94f/0x2540 mm/filemap.c:2634 #2: ffff88805908e0e0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff88805908e0e0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 3 locks held by syz-executor.4/6472: #0: ffff888022c7c460 (sb_writers#13){.+.+}-{0:0}, at: do_sendfile+0x5d9/0xeb0 fs/read_write.c:1248 #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline] #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline] #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline] #1: ffff88805908e520 (mapping.invalidate_lock#3){.+.+}-{3:3}, at: filemap_read+0x94f/0x2540 mm/filemap.c:2634 #2: ffff88805908e0e0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1100 [inline] #2: ffff88805908e0e0 (&ni->ni_lock/5){+.+.}-{3:3}, at: ntfs_readpage+0x17c/0x200 fs/ntfs3/inode.c:727 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe0f/0xe50 kernel/hung_task.c:369 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xb/0x10 arch/x86/kernel/process.c:729