INFO: task syz-executor148:5096 blocked for more than 143 seconds. Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor148 state:D stack:26784 pid:5096 tgid:5096 ppid:5093 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:836 [inline] blkdev_fallocate+0x233/0x550 block/fops.c:792 vfs_fallocate+0x566/0x6c0 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:359 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: 0033:0x7f6450670b29 RSP: 002b:00007ffc092d90f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6450670b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc092d9318 R14: 00007ffc092d9120 R15: 00007ffc092d9110 </TASK> INFO: task syz-executor148:5097 blocked for more than 143 seconds. Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor148 state:D stack:26784 pid:5097 tgid:5097 ppid:5095 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:836 [inline] blkdev_fallocate+0x233/0x550 block/fops.c:792 vfs_fallocate+0x566/0x6c0 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:359 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: 0033:0x7f6450670b29 RSP: 002b:00007ffc092d90f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6450670b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc092d9318 R14: 00007ffc092d9120 R15: 00007ffc092d9110 </TASK> INFO: task syz-executor148:5099 blocked for more than 143 seconds. Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor148 state:D stack:26128 pid:5099 tgid:5099 ppid:5098 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:836 [inline] blkdev_fallocate+0x233/0x550 block/fops.c:792 vfs_fallocate+0x566/0x6c0 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:359 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: 0033:0x7f6450670b29 RSP: 002b:00007ffc092d90f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6450670b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc092d9318 R14: 00007ffc092d9120 R15: 00007ffc092d9110 </TASK> INFO: task syz-executor148:5101 blocked for more than 144 seconds. Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor148 state:D stack:26784 pid:5101 tgid:5101 ppid:5100 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5408 [inline] __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745 __schedule_loop kernel/sched/core.c:6822 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6837 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306 filemap_invalidate_lock include/linux/fs.h:836 [inline] blkdev_fallocate+0x233/0x550 block/fops.c:792 vfs_fallocate+0x566/0x6c0 fs/open.c:330 ksys_fallocate fs/open.c:353 [inline] __do_sys_fallocate fs/open.c:361 [inline] __se_sys_fallocate fs/open.c:359 [inline] __x64_sys_fallocate+0xbd/0x110 fs/open.c:359 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: 0033:0x7f6450670b29 RSP: 002b:00007ffc092d90f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6450670b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc092d9318 R14: 00007ffc092d9120 R15: 00007ffc092d9110 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #0: ffffffff8e333f60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 1 lock held by klogd/4529: 2 locks held by getty/4844: #0: ffff88802aba60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201 2 locks held by syz-executor148/5094: 1 lock held by syz-executor148/5096: #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:792 1 lock held by syz-executor148/5097: #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:792 1 lock held by syz-executor148/5099: #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:792 1 lock held by syz-executor148/5101: #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:792 1 lock held by syz-executor148/5120: #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:836 [inline] #0: ffff88801d4a94c8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x233/0x550 block/fops.c:792 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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:223 [inline] watchdog+0xfde/0x1020 kernel/hung_task.c:379 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.10.0-rc1-syzkaller-00021-ge0cce98fe279 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 RIP: 0010:__read_once_word_nocheck+0xc/0x20 include/asm-generic/rwonce.h:67 Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 53 48 89 fb e8 87 ff 54 00 48 8b 03 <5b> e9 09 2a 6f 0a 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 RSP: 0018:ffffc90000157598 EFLAGS: 00000246 RAX: ffffffff8205e235 RBX: ffffc90000157940 RCX: ffff888016ec5a00 RDX: 0000000080000101 RSI: 0000000000000001 RDI: ffffc90000157940 RBP: 1ffff9200002aed2 R08: ffffffff8140effd R09: ffffffff8140ef56 R10: 0000000000000003 R11: ffff888016ec5a00 R12: ffffc90000157940 R13: dffffc0000000000 R14: 1ffff9200002aed1 R15: 1ffff9200002aed0 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a7ba08f680 CR3: 000000000e132000 CR4: 0000000000350ef0 Call Trace: <NMI> </NMI> <TASK> deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline] unwind_next_frame+0x1356/0x2a00 arch/x86/kernel/unwind_orc.c:585 arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 save_stack+0xfb/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x75/0x3f0 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2565 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0xaff/0x1830 kernel/rcu/tree.c:2809 handle_softirqs+0x2c6/0x970 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928 smpboot_thread_fn+0x546/0xa30 kernel/smpboot.c:164 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.449 msecs