BUG: MAX_LOCK_DEPTH too low! turning off the locking correctness validator. depth: 48 max: 48! 48 locks held by syz.1.316/8874: #0: ffff88806ca68420 (sb_writers#27){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline] #0: ffff88806ca68420 (sb_writers#27){.+.+}-{0:0}, at: vfs_copy_file_range+0x9e4/0x1530 fs/read_write.c:1510 #1: ffff88805d0bad88 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline] #1: ffff88805d0bad88 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: lock_two_nondirectories+0xe1/0x170 fs/inode.c:1125 #2: ffff88805d0bd9c8 (&sb->s_type->i_mutex_key#33/4){+.+.}-{3:3}, at: bch2_remap_file_range+0x36f/0xe90 fs/bcachefs/fs-io.c:874 #3: ffff888054a042d8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:151 [inline] #3: ffff888054a042d8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:250 [inline] #3: ffff888054a042d8 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0xb1/0x220 fs/bcachefs/btree_iter.c:3021 #4: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #4: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #4: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #4: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #5: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #6: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #7: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #8: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #9: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #10: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #11: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #12: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #13: ffff88806abf4070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_increment+0x2f2/0x320 fs/bcachefs/btree_locking.h:270 #14: ffff88805d017340 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #14: ffff88805d017340 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #15: ffff88805d016b30 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #15: ffff88805d016b30 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #16: ffff88805d0179f8 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #16: ffff88805d0179f8 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #17: ffff88807cf55498 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #17: ffff88807cf55498 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #18: ffff88807cf55090 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #18: ffff88807cf55090 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #19: ffff88807cf549d8 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #19: ffff88807cf549d8 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #20: ffff88807cf541c8 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #20: ffff88807cf541c8 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #21: ffff88807cf54070 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #21: ffff88807cf54070 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #22: ffff88807a24d870 (&dev->mutex){....}-{3:3}, at: six_relock_type fs/bcachefs/six.h:289 [inline] #22: ffff88807a24d870 (&dev->mutex){....}-{3:3}, at: __bch2_btree_node_relock+0x142/0x9c0 fs/bcachefs/btree_locking.c:507 #23: ffff88807f057870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #23: ffff88807f057870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #23: ffff88807f057870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #23: ffff88807f057870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #24: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #24: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #24: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #24: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #25: ffff88805d016320 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_cached+0x48d/0xd50 #26: ffff88807a249870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #26: ffff88807a249870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #26: ffff88807a249870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #26: ffff88807a249870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #27: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #27: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #27: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #27: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #28: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #28: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #28: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #28: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #29: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: btree_node_lock_nopath_nofail fs/bcachefs/btree_locking.h:250 [inline] #29: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: bch2_btree_node_alloc+0x114/0xe80 fs/bcachefs/btree_update_interior.c:392 #30: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: btree_split+0x1b88/0x6980 fs/bcachefs/btree_update_interior.c:1674 #31: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: bch2_trans_node_add+0xf98/0x1960 fs/bcachefs/btree_iter.c:699 #32: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: bch2_trans_node_add+0xf98/0x1960 fs/bcachefs/btree_iter.c:699 #33: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: bch2_trans_node_add+0xf98/0x1960 fs/bcachefs/btree_iter.c:699 #34: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: bch2_trans_node_add+0xf98/0x1960 fs/bcachefs/btree_iter.c:699 #35: ffff88807f051070 (&dev->mutex){....}-{3:3}, at: bch2_trans_node_add+0xf98/0x1960 fs/bcachefs/btree_iter.c:699 #36: ffff888054a26750 (&c->gc_lock){.+.+}-{3:3}, at: bch2_btree_update_start+0x68d/0x1500 fs/bcachefs/btree_update_interior.c:1195 #37: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #37: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #37: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #37: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #38: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #38: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #38: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #38: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #39: ffff88807cf54c88 (&dev->mutex){....}-{3:3}, at: six_trylock_intent fs/bcachefs/six.h:366 [inline] #39: ffff88807cf54c88 (&dev->mutex){....}-{3:3}, at: bkey_cached_alloc fs/bcachefs/btree_key_cache.c:290 [inline] #39: ffff88807cf54c88 (&dev->mutex){....}-{3:3}, at: btree_key_cache_create fs/bcachefs/btree_key_cache.c:330 [inline] #39: ffff88807cf54c88 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_cached_slowpath+0x1559/0x48c0 fs/bcachefs/btree_key_cache.c:485 #40: ffff888054a1dc78 (&wp->lock){+.+.}-{3:3}, at: bch2_trans_mutex_lock_norelock fs/bcachefs/alloc_foreground.c:41 [inline] #40: ffff888054a1dc78 (&wp->lock){+.+.}-{3:3}, at: writepoint_find fs/bcachefs/alloc_foreground.c:1302 [inline] #40: ffff888054a1dc78 (&wp->lock){+.+.}-{3:3}, at: bch2_alloc_sectors_start_trans+0x2d5/0x1f60 fs/bcachefs/alloc_foreground.c:1410 #41: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: six_trylock_type fs/bcachefs/six.h:207 [inline] #41: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_node_lock fs/bcachefs/btree_locking.h:288 [inline] #41: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: btree_path_lock_root fs/bcachefs/btree_iter.c:757 [inline] #41: ffff88807a24a870 (&dev->mutex){....}-{3:3}, at: bch2_btree_path_traverse_one+0xa44/0x2930 fs/bcachefs/btree_iter.c:1177 #42: ffffc90000007c00 (&(&idev->mc_ifc_work)->timer){..-.}-{0:0}, at: call_timer_fn+0xc0/0x650 kernel/time/timer.c:1789 #43: ffffffff8e335fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:327 [inline] #43: ffffffff8e335fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:839 [inline] #43: ffffffff8e335fe0 (rcu_read_lock){....}-{1:2}, at: __queue_work+0x199/0xf50 kernel/workqueue.c:2261 #44: ffff8880b943de98 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x759/0xf50 #45: ffff888065fbe418 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline] #45: ffff888065fbe418 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1470 kernel/sched/core.c:4051 #46: ffff8880b943e718 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 #47: ffff8880b9428948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_change+0xfd/0x280 kernel/sched/psi.c:913 INFO: lockdep is turned off. CPU: 0 PID: 8874 Comm: syz.1.316 Not tainted 6.10.0-syzkaller-02711-g0434dbe32053 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 __lock_acquire+0x10c3/0x1fd0 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5753 do_write_seqcount_begin_nested include/linux/seqlock.h:469 [inline] do_write_seqcount_begin include/linux/seqlock.h:495 [inline] psi_group_change+0x1c3/0x11c0 kernel/sched/psi.c:791 psi_task_change+0xfd/0x280 kernel/sched/psi.c:913 psi_enqueue kernel/sched/stats.h:143 [inline] enqueue_task+0x2aa/0x300 kernel/sched/core.c:1975 activate_task kernel/sched/core.c:2009 [inline] ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3582 ttwu_queue kernel/sched/core.c:3846 [inline] try_to_wake_up+0x884/0x1470 kernel/sched/core.c:4167 kick_pool+0x45c/0x620 kernel/workqueue.c:1281 __queue_work+0xc97/0xf50 kernel/workqueue.c:2342 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1838 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x695/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:207 Code: 40 d4 03 00 65 8b 15 10 78 6d 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 <83> fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 48 8d 7e 01 8b 89 fc RSP: 0018:ffffc90003dbc758 EFLAGS: 00000246 RAX: ffffffff8b77fd7d RBX: 000000000000000a RCX: ffff888025fe8000 RDX: 0000000000000002 RSI: 000000000000000a RDI: 0000000000000001 RBP: ffffc90003dbc870 R08: ffffffff8b77fd69 R09: 0000000000000000 R10: ffffc90003dbc7e0 R11: fffff520007b78ff R12: 00000000ffff0a00 R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88806e7cc64d number+0x2bd/0xf90 vsnprintf+0x1542/0x1da0 lib/vsprintf.c:2890 bch2_prt_printf+0x1b8/0x6d0 fs/bcachefs/printbuf.c:183 bch2_btree_path_to_text_short+0x1e8/0x390 fs/bcachefs/btree_iter.c:1476 __bch2_trans_paths_to_text+0xe5/0x180 fs/bcachefs/btree_iter.c:1541 bch2_trans_update_max_paths+0x16e/0x420 fs/bcachefs/btree_iter.c:1577 btree_path_alloc+0x88a/0xaa0 fs/bcachefs/btree_iter.c:1674 btree_path_clone fs/bcachefs/btree_iter.c:1235 [inline] __bch2_btree_path_make_mut+0x134/0x570 fs/bcachefs/btree_iter.c:1249 bch2_btree_path_make_mut fs/bcachefs/btree_iter.h:196 [inline] __bch2_btree_path_set_pos+0x382/0x1750 fs/bcachefs/btree_iter.c:1264 bch2_btree_path_set_pos fs/bcachefs/btree_iter.h:211 [inline] __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2176 [inline] bch2_btree_iter_peek_upto+0xb54/0x7090 fs/bcachefs/btree_iter.c:2280 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:641 [inline] bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:491 [inline] bch2_bucket_alloc_trans+0x111d/0x3b30 fs/bcachefs/alloc_foreground.c:649 bch2_bucket_alloc_set_trans+0x4f9/0xcf0 fs/bcachefs/alloc_foreground.c:810 __open_bucket_add_buckets+0x11ed/0x1c80 fs/bcachefs/alloc_foreground.c:1058 open_bucket_add_buckets+0x174/0x230 fs/bcachefs/alloc_foreground.c:1102 bch2_alloc_sectors_start_trans+0xcaf/0x1f60 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:333 [inline] bch2_btree_reserve_get+0x5f5/0x18d0 fs/bcachefs/btree_update_interior.c:547 bch2_btree_update_start+0xe84/0x1500 fs/bcachefs/btree_update_interior.c:1245 bch2_btree_split_leaf+0x12c/0x810 fs/bcachefs/btree_update_interior.c:1851 bch2_trans_commit_error+0x200/0x1210 fs/bcachefs/btree_trans_commit.c:918 __bch2_trans_commit+0x6e6c/0x88e0 fs/bcachefs/btree_trans_commit.c:1138 bch2_trans_commit fs/bcachefs/btree_update.h:170 [inline] bch2_extent_update+0x4c0/0xbb0 fs/bcachefs/io_write.c:326 bch2_fpunch_at+0x87c/0x1020 fs/bcachefs/io_misc.c:184 bch2_remap_range+0x33e0/0x5150 fs/bcachefs/reflink.c:511 bch2_remap_file_range+0x7bd/0xe90 fs/bcachefs/fs-io.c:903 vfs_copy_file_range+0xc1f/0x1530 fs/read_write.c:1522 __do_sys_copy_file_range fs/read_write.c:1612 [inline] __se_sys_copy_file_range+0x3f2/0x5d0 fs/read_write.c:1575 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: 0033:0x7fb0a9575a19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb0a8fff048 EFLAGS: 00000246 ORIG_RAX: 0000000000000146 RAX: ffffffffffffffda RBX: 00007fb0a9704110 RCX: 00007fb0a9575a19 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00007fb0a95e4e49 R08: ffffffffa003e459 R09: 0700000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fb0a9704110 R15: 00007ffe48756768 ---------------- Code disassembly (best guess): 0: 40 d4 rex (bad) 2: 03 00 add (%rax),%eax 4: 65 8b 15 10 78 6d 7e mov %gs:0x7e6d7810(%rip),%edx # 0x7e6d781b b: f7 c2 00 01 ff 00 test $0xff0100,%edx 11: 74 11 je 0x24 13: f7 c2 00 01 00 00 test $0x100,%edx 19: 74 35 je 0x50 1b: 83 b9 1c 16 00 00 00 cmpl $0x0,0x161c(%rcx) 22: 74 2c je 0x50 24: 8b 91 f8 15 00 00 mov 0x15f8(%rcx),%edx * 2a: 83 fa 02 cmp $0x2,%edx <-- trapping instruction 2d: 75 21 jne 0x50 2f: 48 8b 91 00 16 00 00 mov 0x1600(%rcx),%rdx 36: 48 8b 32 mov (%rdx),%rsi 39: 48 8d 7e 01 lea 0x1(%rsi),%rdi 3d: 8b .byte 0x8b 3e: 89 fc mov %edi,%esp