bisecting fixing commit since 765675379b6253b6901563e649a2f87d28ada3ff building syzkaller on 143a10e9d6320fa7e38693bd8df375fcf4446ae6 testing commit 765675379b6253b6901563e649a2f87d28ada3ff with gcc (GCC) 8.1.0 kernel signature: c527306d0dbea4c558012131fe5068ef90f770593539424a60138c300b8db568 run #0: crashed: INFO: task hung in d_alloc_parallel run #1: crashed: INFO: task hung in d_alloc_parallel run #2: crashed: INFO: task hung in d_alloc_parallel run #3: crashed: INFO: task hung in d_alloc_parallel run #4: crashed: INFO: task hung in d_alloc_parallel run #5: OK run #6: crashed: INFO: task hung in d_alloc_parallel run #7: crashed: INFO: task hung in d_alloc_parallel run #8: OK run #9: OK testing current HEAD f6d5cb9e2c06f7d583dd9f4f7cca21d13d78c32a testing commit f6d5cb9e2c06f7d583dd9f4f7cca21d13d78c32a with gcc (GCC) 8.1.0 kernel signature: 086ed369316eaa74817642c697b02786f60c1ad33b1c63bce362bbc19747554e run #0: crashed: INFO: task hung in d_alloc_parallel run #1: crashed: INFO: task hung in d_alloc_parallel run #2: crashed: INFO: task hung in d_alloc_parallel run #3: crashed: INFO: task hung in d_alloc_parallel run #4: crashed: INFO: task hung in d_alloc_parallel run #5: OK run #6: OK run #7: crashed: INFO: task hung in d_alloc_parallel run #8: OK run #9: OK revisions tested: 2, total time: 40m51.021638175s (build: 20m6.724685696s, test: 19m7.828561452s) the crash still happens on HEAD commit msg: Linux 4.19.142 crash: INFO: task hung in d_alloc_parallel INFO: task syz-executor.5:17009 blocked for more than 140 seconds. Not tainted 4.19.142-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28664 17009 6569 0x00000000 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x78c/0x1c10 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 d_wait_lookup fs/dcache.c:2428 [inline] d_alloc_parallel+0xdc6/0x1750 fs/dcache.c:2510 lookup_open+0x46e/0x1d30 fs/namei.c:3148 do_last fs/namei.c:3327 [inline] path_openat+0x1683/0x3c60 fs/namei.c:3537 do_filp_open+0x177/0x250 fs/namei.c:3567 do_sys_open+0x1dd/0x350 fs/open.c:1085 __do_sys_open fs/open.c:1103 [inline] __se_sys_open fs/open.c:1098 [inline] __x64_sys_open+0x79/0xb0 fs/open.c:1098 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c8a9 Code: Bad RIP value. RSP: 002b:00007feb2f616c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000004f6880 RCX: 000000000045c8a9 RDX: 0000000000000049 RSI: 00000000000a8482 RDI: 0000000020000000 RBP: 000000000078c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000773 R14: 00000000005251df R15: 00007feb2f6176d4 Showing all locks held in the system: 2 locks held by kworker/u4:4/992: #0: 00000000521aa1f3 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1823 [inline] #0: 00000000521aa1f3 (&rq->lock){-.-.}, at: __schedule+0x1f5/0x1c10 kernel/sched/core.c:3455 #1: 00000000d781686e ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}, at: process_one_work+0x792/0x1670 kernel/workqueue.c:2130 1 lock held by khungtaskd/1066: #0: 00000000f5c7957b (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4442 1 lock held by in:imklog/6097: #0: 00000000056987c9 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xa7/0xd0 fs/file.c:767 1 lock held by syz-executor.1/6595: #0: 00000000c375e9a8 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #0: 00000000c375e9a8 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x3a0/0x8a0 kernel/rcu/tree_exp.h:667 2 locks held by kworker/1:3/6731: #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: __write_once_size include/linux/compiler.h:220 [inline] #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:59 [inline] #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 00000000d3969169 ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x762/0x1670 kernel/workqueue.c:2126 #1: 0000000037784aee ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x792/0x1670 kernel/workqueue.c:2130 2 locks held by syz-executor.5/16968: #0: 0000000057ac0ef5 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 0000000057ac0ef5 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 0000000057ac0ef5 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 0000000002c76886 (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 2 locks held by syz-executor.5/17009: #0: 000000009889bd38 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000009889bd38 (sb_writers#16){.+.+}, at: mnt_want_write+0x3c/0xa0 fs/namespace.c:360 #1: 0000000057ac0ef5 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #1: 0000000057ac0ef5 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #1: 0000000057ac0ef5 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 2 locks held by syz-executor.0/22381: #0: 000000009c7accc9 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 000000009c7accc9 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 000000009c7accc9 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 00000000ad1e23d1 (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 2 locks held by syz-executor.0/22394: #0: 00000000581bf77b (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000581bf77b (sb_writers#16){.+.+}, at: mnt_want_write+0x3c/0xa0 fs/namespace.c:360 #1: 000000009c7accc9 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #1: 000000009c7accc9 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #1: 000000009c7accc9 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 1 lock held by syz-executor.0/22442: #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: lock_mount+0x82/0x290 fs/namespace.c:2039 2 locks held by syz-executor.0/22443: #0: 00000000e0516970 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000e0516970 (sb_writers#16){.+.+}, at: mnt_want_write+0x3c/0xa0 fs/namespace.c:360 #1: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #1: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #1: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 1 lock held by syz-executor.0/22448: #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 2 locks held by syz-executor.0/22400: #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000476af514 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 00000000db8072f7 (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 1 lock held by syz-executor.4/22449: #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: lock_mount+0x82/0x290 fs/namespace.c:2039 1 lock held by syz-executor.4/22453: #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 2 locks held by syz-executor.4/22410: #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000a47ab29d (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 00000000e92e17f9 (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 1 lock held by syz-executor.3/22456: #0: 0000000023bf9565 (&type->i_mutex_dir_key#8){++++}, at: inode_lock include/linux/fs.h:748 [inline] #0: 0000000023bf9565 (&type->i_mutex_dir_key#8){++++}, at: lock_mount+0x82/0x290 fs/namespace.c:2039 2 locks held by syz-executor.3/22421: #0: 0000000023bf9565 (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 0000000023bf9565 (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 0000000023bf9565 (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 0000000046447e28 (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 1 lock held by syz-executor.5/22479: #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: lock_mount+0x82/0x290 fs/namespace.c:2039 2 locks held by syz-executor.5/22480: #0: 000000002509618a (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000002509618a (sb_writers#16){.+.+}, at: mnt_want_write+0x3c/0xa0 fs/namespace.c:360 #1: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #1: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #1: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 1 lock held by syz-executor.5/22485: #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 2 locks held by syz-executor.5/22441: #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000ba0f749f (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 000000002a625e3f (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 3 locks held by syz-executor.2/22492: #0: 000000003cddb4a0 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000003cddb4a0 (sb_writers#16){.+.+}, at: mnt_want_write+0x3c/0xa0 fs/namespace.c:360 #1: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #1: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #1: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #2: 00000000f5c7957b (rcu_read_lock){....}, at: rebalance_domains+0xcb/0xbb0 kernel/sched/fair.c:9081 1 lock held by syz-executor.2/22505: #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: inode_lock include/linux/fs.h:748 [inline] #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: lock_mount+0x82/0x290 fs/namespace.c:2039 2 locks held by syz-executor.2/22506: #0: 000000003cddb4a0 (sb_writers#16){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 000000003cddb4a0 (sb_writers#16){.+.+}, at: mnt_want_write+0x3c/0xa0 fs/namespace.c:360 #1: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #1: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #1: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 1 lock held by syz-executor.2/22508: #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 2 locks held by syz-executor.2/22495: #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline] #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: do_last fs/namei.c:3326 [inline] #0: 00000000d28d290b (&type->i_mutex_dir_key#8){++++}, at: path_openat+0x1667/0x3c60 fs/namei.c:3537 #1: 000000003a368ca1 (&fi->mutex){+.+.}, at: fuse_lock_inode+0x9a/0xc0 fs/fuse/inode.c:365 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1066 Comm: khungtaskd Not tainted 4.19.142-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 nmi_cpu_backtrace.cold.4+0x3e/0x76 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xe6/0x11a lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x5c3/0xb40 kernel/hung_task.c:287 kthread+0x347/0x410 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3693 Comm: systemd-journal Not tainted 4.19.142-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_read_unlock_sched_notrace include/linux/rcupdate.h:771 [inline] RIP: 0010:trace_lock_acquire include/trace/events/lock.h:13 [inline] RIP: 0010:lock_acquire+0x308/0x3d0 kernel/locking/lockdep.c:3906 Code: fe ff ff 65 ff 05 28 57 b6 7e 48 8b 05 59 16 d1 07 e8 bc 0e 05 00 85 c0 74 09 80 3d 9a be d0 07 00 74 4f 65 ff 0d 08 57 b6 7e <0f> 85 38 fe ff ff e8 40 c4 b4 ff e9 2e fe ff ff 0f 0b 0f 0b 0f 0b RSP: 0018:ffff888093d679f8 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888093d5e984 RBP: ffff888093d67a40 R08: 0000000000000001 R09: 0000000000000000 R10: fffff940004f52e6 R11: ffffea00027a9737 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f76fb77c8c0(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f76f8b70000 CR3: 00000000942ad000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 __debug_check_no_obj_freed lib/debugobjects.c:776 [inline] debug_check_no_obj_freed+0xad/0x472 lib/debugobjects.c:817 free_pages_prepare mm/page_alloc.c:1055 [inline] __free_pages_ok+0x254/0xd90 mm/page_alloc.c:1278 free_the_page mm/page_alloc.c:4460 [inline] __free_pages+0x7f/0xb0 mm/page_alloc.c:4466 kmem_freepages.isra.36+0x426/0x640 mm/slab.c:1459 slab_destroy+0x24/0x60 mm/slab.c:1713 slabs_destroy+0x6b/0x90 mm/slab.c:1729 cache_flusharray mm/slab.c:3490 [inline] ___cache_free+0x276/0x380 mm/slab.c:3532 qlink_free mm/kasan/quarantine.c:147 [inline] qlist_free_all+0x85/0x140 mm/kasan/quarantine.c:166 quarantine_reduce+0x163/0x1a0 mm/kasan/quarantine.c:259 kasan_kmalloc+0x9b/0xe0 mm/kasan/kasan.c:538 kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc mm/slab.c:3397 [inline] kmem_cache_alloc+0x11b/0x730 mm/slab.c:3557 getname_flags+0xb8/0x520 fs/namei.c:140 getname fs/namei.c:211 [inline] user_path_create fs/namei.c:3696 [inline] do_mkdirat+0x9a/0x220 fs/namei.c:3834 __do_sys_mkdir fs/namei.c:3858 [inline] __se_sys_mkdir fs/namei.c:3856 [inline] __x64_sys_mkdir+0x57/0x80 fs/namei.c:3856 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f76faa38687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffeb4ba51f8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffeb4ba8260 RCX: 00007f76faa38687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 0000562c9f7d28c0 RBP: 00007ffeb4ba5230 R08: 0000562c9ed793e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000562c9f7d28c0 R15: 00007ffeb4ba5870