syzkaller login: [ 92.082038][ T10] cfg80211: failed to load regulatory.db Warning: Permanently added '[localhost]:8558' (ED25519) to the list of known hosts. [ 93.159149][ T5312] cgroup: Unknown subsys name 'net' [ 93.231867][ T5312] cgroup: Unknown subsys name 'cpuset' [ 93.238721][ T5312] cgroup: Unknown subsys name 'rlimit' Setting up swapspace version 1, size = 127995904 bytes [ 95.379938][ T5312] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 95.489355][ T5317] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality. executing program [ 95.708234][ T5319] loop0: detected capacity change from 0 to 32768 [ 95.715277][ T5319] ======================================================= [ 95.715277][ T5319] WARNING: The mand mount option has been deprecated and [ 95.715277][ T5319] and is ignored by this kernel. Remove the mand [ 95.715277][ T5319] option from the mount to silence this warning. [ 95.715277][ T5319] ======================================================= [ 95.817889][ T5319] ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode. [ 95.840968][ T5323] syz-executor939[5323]: segfault at fffffe10 ip 00007fb2217b4731 sp 00000000fffffe10 error 4 in syz-executor939010204[48731,7fb221775000+81000] likely on CPU 0 (core 0, socket 0) [ 95.873531][ T5323] Code: c4 28 c3 e8 b1 1d 00 00 90 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 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f [ 95.912335][ T5323] [ 95.913474][ T5323] ====================================================== [ 95.916893][ T5323] WARNING: possible circular locking dependency detected [ 95.920337][ T5323] 6.16.0-rc1-syzkaller-00101-g27605c8c0f69 #0 Not tainted [ 95.924815][ T5323] ------------------------------------------------------ [ 95.928061][ T5323] syz-executor939/5323 is trying to acquire lock: [ 95.931652][ T5323] ffff888045e3cda0 (&oi->ip_alloc_sem){+.+.}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 95.937361][ T5323] [ 95.937361][ T5323] but task is already holding lock: [ 95.940922][ T5323] ffff888045e3ce38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x320 [ 95.945987][ T5323] [ 95.945987][ T5323] which lock already depends on the new lock. [ 95.945987][ T5323] [ 95.950595][ T5323] [ 95.950595][ T5323] the existing dependency chain (in reverse order) is: [ 95.954616][ T5323] [ 95.954616][ T5323] -> #4 (&oi->ip_xattr_sem){++++}-{4:4}: [ 95.958208][ T5323] lock_acquire+0x120/0x360 [ 95.960558][ T5323] down_read+0x46/0x2e0 [ 95.962735][ T5323] ocfs2_init_acl+0x2f9/0x720 [ 95.965233][ T5323] ocfs2_mknod+0x1321/0x2050 [ 95.967640][ T5323] ocfs2_create+0x1a5/0x440 [ 95.970008][ T5323] path_openat+0x14f4/0x3830 [ 95.972323][ T5323] do_filp_open+0x1fa/0x410 [ 95.974596][ T5323] filp_open+0x176/0x1d0 [ 95.976804][ T5323] do_coredump+0x1bd3/0x3440 [ 95.979302][ T5323] get_signal+0x1109/0x1340 [ 95.981926][ T5323] arch_do_signal_or_restart+0x9a/0x750 [ 95.985373][ T5323] irqentry_exit_to_user_mode+0x81/0x120 [ 95.988660][ T5323] exc_page_fault+0x9f/0xf0 [ 95.990976][ T5323] asm_exc_page_fault+0x26/0x30 [ 95.993460][ T5323] [ 95.993460][ T5323] -> #3 (jbd2_handle){++++}-{0:0}: [ 95.997126][ T5323] lock_acquire+0x120/0x360 [ 95.999867][ T5323] start_this_handle+0x1fa7/0x21c0 [ 96.002572][ T5323] jbd2__journal_start+0x2c1/0x5b0 [ 96.005213][ T5323] jbd2_journal_start+0x2a/0x40 [ 96.008086][ T5323] ocfs2_start_trans+0x376/0x6d0 [ 96.010972][ T5323] ocfs2_unlink+0xa9b/0x1940 [ 96.013297][ T5323] vfs_rmdir+0x3ba/0x520 [ 96.015447][ T5323] do_rmdir+0x2ac/0x630 [ 96.017596][ T5323] __x64_sys_rmdir+0x47/0x50 [ 96.020197][ T5323] do_syscall_64+0xfa/0x3b0 [ 96.022842][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 96.026045][ T5323] [ 96.026045][ T5323] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: [ 96.029899][ T5323] lock_acquire+0x120/0x360 [ 96.032345][ T5323] down_read+0x46/0x2e0 [ 96.035149][ T5323] ocfs2_start_trans+0x36a/0x6d0 [ 96.038381][ T5323] ocfs2_unlink+0xa9b/0x1940 [ 96.041054][ T5323] vfs_rmdir+0x3ba/0x520 [ 96.043523][ T5323] do_rmdir+0x2ac/0x630 [ 96.045657][ T5323] __x64_sys_rmdir+0x47/0x50 [ 96.048197][ T5323] do_syscall_64+0xfa/0x3b0 [ 96.051098][ T5323] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 96.054210][ T5323] [ 96.054210][ T5323] -> #1 (sb_internal#2){.+.+}-{0:0}: [ 96.057441][ T5323] lock_acquire+0x120/0x360 [ 96.059804][ T5323] ocfs2_start_trans+0x26b/0x6d0 [ 96.062272][ T5323] ocfs2_truncate_file+0x643/0x1420 [ 96.064890][ T5323] ocfs2_setattr+0x1520/0x1b40 [ 96.067383][ T5323] notify_change+0xb36/0xe40 [ 96.069889][ T5323] do_truncate+0x1a4/0x220 [ 96.071997][ T5323] do_coredump+0x2ad3/0x3440 [ 96.074243][ T5323] get_signal+0x1109/0x1340 [ 96.076584][ T5323] arch_do_signal_or_restart+0x9a/0x750 [ 96.079408][ T5323] irqentry_exit_to_user_mode+0x81/0x120 [ 96.082231][ T5323] exc_page_fault+0x9f/0xf0 [ 96.084651][ T5323] asm_exc_page_fault+0x26/0x30 [ 96.087546][ T5323] [ 96.087546][ T5323] -> #0 (&oi->ip_alloc_sem){+.+.}-{4:4}: [ 96.091553][ T5323] validate_chain+0xb9b/0x2140 [ 96.094030][ T5323] __lock_acquire+0xab9/0xd20 [ 96.096630][ T5323] lock_acquire+0x120/0x360 [ 96.099176][ T5323] down_write+0x96/0x1f0 [ 96.101310][ T5323] ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 96.103971][ T5323] ocfs2_truncate_file+0xda0/0x1420 [ 96.106612][ T5323] ocfs2_setattr+0x1520/0x1b40 [ 96.109164][ T5323] notify_change+0xb36/0xe40 [ 96.111579][ T5323] do_truncate+0x1a4/0x220 [ 96.113820][ T5323] do_coredump+0x2ad3/0x3440 [ 96.116100][ T5323] get_signal+0x1109/0x1340 [ 96.118323][ T5323] arch_do_signal_or_restart+0x9a/0x750 [ 96.121274][ T5323] irqentry_exit_to_user_mode+0x81/0x120 [ 96.124193][ T5323] exc_page_fault+0x9f/0xf0 [ 96.126783][ T5323] asm_exc_page_fault+0x26/0x30 [ 96.129296][ T5323] [ 96.129296][ T5323] other info that might help us debug this: [ 96.129296][ T5323] [ 96.134409][ T5323] Chain exists of: [ 96.134409][ T5323] &oi->ip_alloc_sem --> jbd2_handle --> &oi->ip_xattr_sem [ 96.134409][ T5323] [ 96.140491][ T5323] Possible unsafe locking scenario: [ 96.140491][ T5323] [ 96.143827][ T5323] CPU0 CPU1 [ 96.146723][ T5323] ---- ---- [ 96.149750][ T5323] lock(&oi->ip_xattr_sem); [ 96.151983][ T5323] lock(jbd2_handle); [ 96.154754][ T5323] lock(&oi->ip_xattr_sem); [ 96.157742][ T5323] lock(&oi->ip_alloc_sem); [ 96.159734][ T5323] [ 96.159734][ T5323] *** DEADLOCK *** [ 96.159734][ T5323] [ 96.163995][ T5323] 2 locks held by syz-executor939/5323: [ 96.166632][ T5323] #0: ffff888045e3d100 (&sb->s_type->i_mutex_key#19){+.+.}-{4:4}, at: do_truncate+0x171/0x220 [ 96.171261][ T5323] #1: ffff888045e3ce38 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x320 [ 96.176451][ T5323] [ 96.176451][ T5323] stack backtrace: [ 96.179050][ T5323] CPU: 0 UID: 0 PID: 5323 Comm: syz-executor939 Not tainted 6.16.0-rc1-syzkaller-00101-g27605c8c0f69 #0 PREEMPT(full) [ 96.179063][ T5323] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 96.179070][ T5323] Call Trace: [ 96.179078][ T5323] [ 96.179084][ T5323] dump_stack_lvl+0x189/0x250 [ 96.179107][ T5323] ? __pfx_dump_stack_lvl+0x10/0x10 [ 96.179121][ T5323] ? __pfx__printk+0x10/0x10 [ 96.179132][ T5323] ? print_lock_name+0xde/0x100 [ 96.179141][ T5323] print_circular_bug+0x2ee/0x310 [ 96.179153][ T5323] check_noncircular+0x134/0x160 [ 96.179163][ T5323] validate_chain+0xb9b/0x2140 [ 96.179176][ T5323] __lock_acquire+0xab9/0xd20 [ 96.179191][ T5323] ? ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 96.179207][ T5323] lock_acquire+0x120/0x360 [ 96.179219][ T5323] ? ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 96.179232][ T5323] down_write+0x96/0x1f0 [ 96.179242][ T5323] ? ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 96.179253][ T5323] ? __pfx_down_write+0x10/0x10 [ 96.179264][ T5323] ocfs2_try_remove_refcount_tree+0xb6/0x320 [ 96.179276][ T5323] ? __pfx_ocfs2_try_remove_refcount_tree+0x10/0x10 [ 96.179289][ T5323] ? up_write+0x1c4/0x420 [ 96.179298][ T5323] ocfs2_truncate_file+0xda0/0x1420 [ 96.179317][ T5323] ? __pfx_ocfs2_truncate_file+0x10/0x10 [ 96.179330][ T5323] ? do_raw_spin_unlock+0x4d/0x240 [ 96.179340][ T5323] ? _raw_spin_unlock+0x28/0x50 [ 96.179353][ T5323] ? ocfs2_inode_lock_tracker+0x3ec/0x660 [ 96.179365][ T5323] ? __pfx_ocfs2_inode_lock_tracker+0x10/0x10 [ 96.179375][ T5323] ? ocfs2_rw_lock+0x13a/0x240 [ 96.179384][ T5323] ? __pfx___dquot_initialize+0x10/0x10 [ 96.179397][ T5323] ? __pfx_ocfs2_rw_lock+0x10/0x10 [ 96.179407][ T5323] ? setattr_prepare+0x1e7/0xac0 [ 96.179425][ T5323] ? inode_newsize_ok+0x11b/0x1c0 [ 96.179440][ T5323] ocfs2_setattr+0x1520/0x1b40 [ 96.179454][ T5323] ? __pfx_ocfs2_setattr+0x10/0x10 [ 96.179467][ T5323] ? ktime_get_coarse_real_ts64_mg+0x52/0x1e0 [ 96.179481][ T5323] ? seqcount_lockdep_reader_access+0x175/0x1c0 [ 96.179499][ T5323] ? ktime_get_coarse_real_ts64_mg+0x1be/0x1e0 [ 96.179513][ T5323] ? current_time+0x222/0x370 [ 96.179530][ T5323] ? evm_inode_setattr+0x1b6/0x7d0 [ 96.179545][ T5323] ? __pfx_current_time+0x10/0x10 [ 96.179558][ T5323] ? try_break_deleg+0x79/0x130 [ 96.179572][ T5323] ? __pfx_ocfs2_setattr+0x10/0x10 [ 96.179582][ T5323] notify_change+0xb36/0xe40 [ 96.179599][ T5323] do_truncate+0x1a4/0x220 [ 96.179610][ T5323] ? __pfx_do_truncate+0x10/0x10 [ 96.179619][ T5323] ? filp_open+0x181/0x1d0 [ 96.179634][ T5323] ? getname_kernel+0x20e/0x2f0 [ 96.179648][ T5323] do_coredump+0x2ad3/0x3440 [ 96.179669][ T5323] ? __pfx_do_coredump+0x10/0x10 [ 96.179682][ T5323] ? do_raw_spin_unlock+0x4d/0x240 [ 96.179699][ T5323] ? kasan_save_track+0x4f/0x80 [ 96.179713][ T5323] ? kasan_save_track+0x3e/0x80 [ 96.179726][ T5323] ? kasan_save_free_info+0x46/0x50 [ 96.179737][ T5323] ? __kasan_slab_free+0x62/0x70 [ 96.179745][ T5323] ? kmem_cache_free+0x18f/0x400 [ 96.179756][ T5323] ? get_signal+0xa4c/0x1340 [ 96.179771][ T5323] ? arch_do_signal_or_restart+0x9a/0x750 [ 96.179791][ T5323] ? irqentry_exit_to_user_mode+0x81/0x120 [ 96.179807][ T5323] ? exc_page_fault+0x9f/0xf0 [ 96.179820][ T5323] ? asm_exc_page_fault+0x26/0x30 [ 96.179838][ T5323] ? proc_coredump_connector+0x172/0x4b0 [ 96.179855][ T5323] ? __pfx_proc_coredump_connector+0x10/0x10 [ 96.179873][ T5323] ? _raw_spin_unlock_irq+0x23/0x50 [ 96.179886][ T5323] ? lockdep_hardirqs_on+0x9c/0x150 [ 96.179901][ T5323] get_signal+0x1109/0x1340 [ 96.179920][ T5323] arch_do_signal_or_restart+0x9a/0x750 [ 96.179932][ T5323] ? rcu_is_watching+0x15/0xb0 [ 96.179948][ T5323] ? __pfx_arch_do_signal_or_restart+0x10/0x10 [ 96.179960][ T5323] ? __bad_area_nosemaphore+0x3fb/0x780 [ 96.179974][ T5323] ? local_irq_enable_exit_to_user+0x5/0x10 [ 96.179991][ T5323] irqentry_exit_to_user_mode+0x81/0x120 [ 96.180006][ T5323] exc_page_fault+0x9f/0xf0 [ 96.180021][ T5323] asm_exc_page_fault+0x26/0x30 [ 96.180032][ T5323] RIP: 0033:0x7fb2217b4731 [ 96.180044][ T5323] Code: c4 28 c3 e8 b1 1d 00 00 90 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 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f [ 96.180053][ T5323] RSP: 002b:00000000fffffe10 EFLAGS: 00010217 [ 96.180065][ T5323] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fb2217b4729 [ 96.180072][ T5323] RDX: 0000000000000000 RSI: 00000000fffffe10 RDI: 0000000000000000 [ 96.180077][ T5323] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fff00000003 [ 96.180084][ T5323] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 [ 96.180090][ T5323] R13: 0000200000000040 R14: 0000000001000000 R15: 0000200000004440 [ 96.180100][ T5323] [ 96.450869][ T5323] ocfs2: Unmounting device (7,0) on (node local) [ 96.463571][ T5312] syz-executor939 (5312) used greatest stack depth: 20776 bytes left VM DIAGNOSIS: 12:24:28 Registers: info registers vcpu 0 CPU#0 RAX=0000000000000036 RBX=0000000000000036 RCX=0000000000000000 RDX=00000000000003f8 RSI=0000000000000000 RDI=0000000000000020 RBP=00000000000003f8 RSP=ffffc9000d3b6690 R8 =ffff888033b60237 R9 =1ffff1100676c046 R10=dffffc0000000000 R11=ffffffff85470f30 R12=dffffc0000000000 R13=ffffffff99ac38db R14=ffffffff99dc8780 R15=0000000000000000 RIP=ffffffff85470fac RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 ffffffff 00c00000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 ffffffff 00c00000 FS =0000 000055556c15e380 ffffffff 00c00000 GS =0000 ffff88808d252000 ffffffff 00c00000 LDT=0000 0000000000000000 ffffffff 00c00000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2be5849000 CR3=0000000042618000 CR4=00352ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000fffe0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 Opmask00=00000000fefffc00 Opmask01=000000000000007f Opmask02=00000000fdfff7ff Opmask03=0000000000000000 Opmask04=00000000ffffefff Opmask05=0000000000000000 Opmask06=0000000000000000 Opmask07=0000000000000000 ZMM00=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfe9f5190 000055ecfe9f5190 ZMM01=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfe9f51a0 ZMM02=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfe9fb2f0 ZMM03=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM04=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00007f2be51f1b20 ZMM05=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ffff000000000000 ffff00000000ff00 ZMM06=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 00000000ff000000 0000000000000000 ZMM07=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM08=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM09=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM10=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM11=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM12=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM13=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM14=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM15=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM16=0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfea02800 000055ecfea008c0 000055ecfe9e8640 000055ecfe9f77b0 ZMM17=0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfea07db0 000055ecfe9f8bb0 000055ecfea01070 000055ecfea004b0 ZMM18=0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfe9f6810 000055ecfea07db0 000055ecfe9f8bb0 000055ecfea01070 ZMM19=0000000000000000 0000000000000000 0000000000000000 0000000000000000 000055ecfea004b0 000055ecfea02800 000055ecfea008c0 000055ecfe9e8640 ZMM20=0000000000000000 0000000000000000 0000000000000000 0000000000000000 53410030363d5455 4f454d4954006264 2e79726f74616c75 6765723d45520036 ZMM21=0000000000000000 0000000000000000 0000000000000000 0000000000000000 161200455a517155 7208180705453164 6a353d303c352d25 3120363d78164c79 ZMM22=0000000000000000 0000000000000000 0000000000000000 0000000000000000 7e7f7f7f7f737f5d 776f7f777f7f7f65 6f7f7f3f3c773f3f 7f7f763d7e3f7d7b ZMM23=0000000000000000 0000000000000000 0000000000000000 0000000000000000 343064623a312b32 316f70627e322d33 2e36312e312d6e61 696265642d332e36 ZMM24=0000000000000000 0000000000000000 0000000000000000 0000000000000000 3532383d444f4d00 3030005952544e55 4f430065723a6672 6166703d4d453d53 ZMM25=0000000000000000 0000000000000000 0000000000000000 0000000000000000 3500003035373d00 3030004552000034 2e32003d4d3a4e51 455300313d430036 ZMM26=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM27=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM28=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM29=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM30=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ZMM31=0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000