INFO: task syz-executor.0:15795 blocked for more than 143 seconds. Not tainted 6.0.0-rc2-syzkaller-00283-g10d4879f9ef0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:26552 pid:15795 ppid: 3641 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 rwsem_down_read_slowpath+0x5fe/0x950 kernel/locking/rwsem.c:1087 __down_read_common+0x54/0x2a0 kernel/locking/rwsem.c:1252 filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 do_async_mmap_readahead+0x459/0x6b0 mm/filemap.c:3056 filemap_fault+0x1f9/0xf60 mm/filemap.c:3110 __do_fault+0x139/0x4f0 mm/memory.c:4173 do_read_fault mm/memory.c:4518 [inline] do_fault mm/memory.c:4647 [inline] handle_pte_fault mm/memory.c:4911 [inline] __handle_mm_fault mm/memory.c:5053 [inline] handle_mm_fault+0x2835/0x35c0 mm/memory.c:5151 do_user_addr_fault+0x69b/0xcb0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1488 [inline] exc_page_fault+0x7a/0x120 arch/x86/mm/fault.c:1544 asm_exc_page_fault+0x22/0x30 RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 66 2e 0f 1f 84 00 00 00 00 00 RSP: 0018:ffffc90006287a38 EFLAGS: 00050206 RAX: ffffffff8435b801 RBX: 00007fffffffe000 RCX: 0000000000001000 RDX: 0000000000001000 RSI: 0000000020239000 RDI: ffff888020e96000 RBP: ffff88807e1d0a10 R08: dffffc0000000000 R09: ffffed10041d2e00 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000001000 R13: 0000000000001000 R14: ffff888020e96000 R15: 0000000020239000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] _copy_from_user+0xf0/0x160 lib/usercopy.c:16 copy_from_user include/linux/uaccess.h:152 [inline] snd_rawmidi_kernel_write1+0x3bd/0x660 sound/core/rawmidi.c:1549 snd_rawmidi_write+0x615/0xbe0 sound/core/rawmidi.c:1618 vfs_write+0x2e5/0xbb0 fs/read_write.c:576 ksys_write+0x19b/0x2c0 fs/read_write.c:631 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f89ba489279 RSP: 002b:00007f89bb552168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f89ba59bf80 RCX: 00007f89ba489279 RDX: 00000000fffffd2c RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f89ba4e3189 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd2a13c4af R14: 00007f89bb552300 R15: 0000000000022000 INFO: task syz-executor.1:15802 blocked for more than 145 seconds. Not tainted 6.0.0-rc2-syzkaller-00283-g10d4879f9ef0 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27296 pid:15802 ppid: 3643 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x957/0xe20 kernel/sched/core.c:6494 schedule+0xcb/0x190 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0xe1c/0x1390 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x163/0x170 kernel/locking/rwsem.c:1553 filemap_invalidate_lock include/linux/fs.h:801 [inline] blk_ioctl_zeroout block/ioctl.c:182 [inline] blkdev_common_ioctl+0x151e/0x2350 block/ioctl.c:485 blkdev_ioctl+0x2f2/0x760 block/ioctl.c:608 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f37efc89279 RSP: 002b:00007f37f0e0e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f37efd9c120 RCX: 00007f37efc89279 RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000005 RBP: 00007f37f0e0e1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffd1b10971f R14: 00007f37f0e0e300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8cd20970 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8cd21170 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8cd207a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3292: #0: ffff8880274fb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177 1 lock held by syz-executor.2/15781: 1 lock held by syz-executor.2/15782: 2 locks held by syz-executor.5/15786: 1 lock held by syz-executor.3/15787: 1 lock held by syz-executor.0/15795: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.1/15802: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:801 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:182 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x151e/0x2350 block/ioctl.c:485 1 lock held by syz-executor.2/15902: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.2/15905: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.0/15918: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.0/15919: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.1/15921: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.3/15947: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 1 lock held by syz-executor.5/15979: #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:811 [inline] #0: ffff88801bb888c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf0/0x640 mm/readahead.c:220 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-syzkaller-00283-g10d4879f9ef0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x169/0x280 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+0xcd5/0xd20 kernel/hung_task.c:369 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 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 acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry drivers/acpi/processor_idle.c:555 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_idle_enter+0x43d/0x7a0 drivers/acpi/processor_idle.c:692