Warning: Permanently added '10.128.0.104' (ED25519) to the list of known hosts. 2026/06/21 16:14:57 parsed 1 programs [ 52.364367][ T1959] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2026/06/21 16:15:04 executed programs: 0 [ 61.451980][ T2857] loop3: detected capacity change from 0 to 64 [ 61.458742][ T2857] ======================================================= [ 61.458742][ T2857] WARNING: The mand mount option has been deprecated and [ 61.458742][ T2857] and is ignored by this kernel. Remove the mand [ 61.458742][ T2857] option from the mount to silence this warning. [ 61.458742][ T2857] ======================================================= [ 61.523316][ T2860] loop3: detected capacity change from 0 to 64 [ 61.558926][ T2863] loop3: detected capacity change from 0 to 64 [ 61.598875][ T2866] loop3: detected capacity change from 0 to 64 [ 61.635472][ T2869] loop3: detected capacity change from 0 to 64 [ 61.662230][ T2872] loop3: detected capacity change from 0 to 64 [ 61.686750][ T2875] loop3: detected capacity change from 0 to 64 [ 61.707089][ T2439] hfs: walked past end of dir 2026/06/21 16:15:12 executed programs: 11 [ 65.841352][ T3295] loop4: detected capacity change from 0 to 64 [ 65.874468][ T3299] loop4: detected capacity change from 0 to 64 [ 65.909465][ T3302] loop4: detected capacity change from 0 to 64 [ 66.314774][ T3348] [ 66.317148][ T3348] ====================================================== [ 66.324160][ T3348] WARNING: possible circular locking dependency detected [ 66.331172][ T3348] syzkaller #0 Not tainted [ 66.335581][ T3348] ------------------------------------------------------ [ 66.342591][ T3348] syz.4.42/3348 is trying to acquire lock: [ 66.348474][ T3348] ffff88810b7130f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0x3c/0x470 [ 66.359138][ T3348] [ 66.359138][ T3348] but task is already holding lock: [ 66.366582][ T3348] ffff8881097bc0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x74/0x80 [ 66.375800][ T3348] [ 66.375800][ T3348] which lock already depends on the new lock. [ 66.375800][ T3348] [ 66.386189][ T3348] [ 66.386189][ T3348] the existing dependency chain (in reverse order) is: [ 66.395276][ T3348] [ 66.395276][ T3348] -> #1 (&tree->tree_lock/1){+.+.}-{3:3}: [ 66.403150][ T3348] __mutex_lock+0x97/0xa10 [ 66.408069][ T3348] hfs_find_init+0x74/0x80 [ 66.412984][ T3348] hfs_extend_file+0xd2/0x470 [ 66.418424][ T3348] hfs_bmap_reserve+0x1d/0x90 [ 66.423862][ T3348] hfs_cat_create+0x12e/0x330 [ 66.429037][ T3348] hfs_create+0x38/0x90 [ 66.433690][ T3348] path_openat+0x601/0xc60 [ 66.438611][ T3348] do_filp_open+0xab/0x150 [ 66.443548][ T3348] do_sys_openat2+0x7c/0x160 [ 66.448639][ T3348] __x64_sys_openat+0x78/0xa0 [ 66.453825][ T3348] do_syscall_64+0x4c/0xa0 [ 66.458756][ T3348] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 66.465335][ T3348] [ 66.465335][ T3348] -> #0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}: [ 66.474620][ T3348] __lock_acquire+0x14fd/0x2690 [ 66.480141][ T3348] lock_acquire+0xe9/0x270 [ 66.485065][ T3348] __mutex_lock+0x97/0xa10 [ 66.489986][ T3348] hfs_extend_file+0x3c/0x470 [ 66.495162][ T3348] hfs_bmap_reserve+0x1d/0x90 [ 66.500335][ T3348] __hfs_ext_write_extent+0x7a/0xa0 [ 66.506031][ T3348] hfs_ext_write_extent+0x8a/0xc0 [ 66.511642][ T3348] hfs_write_inode+0x24/0x3a0 [ 66.516848][ T3348] __writeback_single_inode+0x18c/0x380 [ 66.522906][ T3348] writeback_single_inode+0x7c/0x270 [ 66.528694][ T3348] write_inode_now+0xc1/0xe0 [ 66.533872][ T3348] hfs_file_fsync+0x30/0x70 [ 66.539072][ T3348] generic_file_write_iter+0x91/0xb0 [ 66.544961][ T3348] vfs_write+0x23d/0x2e0 [ 66.549791][ T3348] ksys_write+0x70/0xf0 [ 66.554473][ T3348] do_syscall_64+0x4c/0xa0 [ 66.559571][ T3348] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 66.565981][ T3348] [ 66.565981][ T3348] other info that might help us debug this: [ 66.565981][ T3348] [ 66.576371][ T3348] Possible unsafe locking scenario: [ 66.576371][ T3348] [ 66.583890][ T3348] CPU0 CPU1 [ 66.589236][ T3348] ---- ---- [ 66.594580][ T3348] lock(&tree->tree_lock/1); [ 66.599410][ T3348] lock(&HFS_I(tree->inode)->extents_lock); [ 66.607902][ T3348] lock(&tree->tree_lock/1); [ 66.615074][ T3348] lock(&HFS_I(tree->inode)->extents_lock); [ 66.621030][ T3348] [ 66.621030][ T3348] *** DEADLOCK *** [ 66.621030][ T3348] [ 66.629172][ T3348] 4 locks held by syz.4.42/3348: [ 66.634268][ T3348] #0: ffff88810cbfdee8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xa8/0xc0 [ 66.643359][ T3348] #1: ffff8881097ba450 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0xbe/0x2e0 [ 66.652275][ T3348] #2: ffff88810b7168a8 (&sb->s_type->i_mutex_key#20){+.+.}-{3:3}, at: hfs_file_fsync+0x26/0x70 [ 66.662753][ T3348] #3: ffff8881097bc0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x74/0x80 [ 66.672360][ T3348] [ 66.672360][ T3348] stack backtrace: [ 66.678233][ T3348] CPU: 1 PID: 3348 Comm: syz.4.42 Not tainted syzkaller #0 [ 66.685408][ T3348] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 [ 66.695447][ T3348] Call Trace: [ 66.698712][ T3348] [ 66.701632][ T3348] dump_stack_lvl+0x7f/0xdb [ 66.706167][ T3348] print_circular_bug+0x2dc/0x310 [ 66.711181][ T3348] check_noncircular+0xfb/0x110 [ 66.716011][ T3348] __lock_acquire+0x14fd/0x2690 [ 66.720839][ T3348] ? stack_trace_save+0x42/0x60 [ 66.725676][ T3348] ? add_lock_to_list+0x14b/0x1b0 [ 66.730677][ T3348] ? save_trace+0x49/0x370 [ 66.735072][ T3348] ? __lock_acquire+0x1ed0/0x2690 [ 66.740072][ T3348] ? hfs_extend_file+0x3c/0x470 [ 66.744930][ T3348] lock_acquire+0xe9/0x270 [ 66.749324][ T3348] ? hfs_extend_file+0x3c/0x470 [ 66.754160][ T3348] ? hfs_extend_file+0x3c/0x470 [ 66.758999][ T3348] __mutex_lock+0x97/0xa10 [ 66.763426][ T3348] ? hfs_extend_file+0x3c/0x470 [ 66.768534][ T3348] ? hfs_find_init+0x74/0x80 [ 66.773109][ T3348] hfs_extend_file+0x3c/0x470 [ 66.777774][ T3348] ? __mutex_lock+0x246/0xa10 [ 66.782525][ T3348] hfs_bmap_reserve+0x1d/0x90 [ 66.787182][ T3348] __hfs_ext_write_extent+0x7a/0xa0 [ 66.792539][ T3348] hfs_ext_write_extent+0x8a/0xc0 [ 66.797540][ T3348] hfs_write_inode+0x24/0x3a0 [ 66.802195][ T3348] ? __writeback_single_inode+0x137/0x380 [ 66.807901][ T3348] __writeback_single_inode+0x18c/0x380 [ 66.813438][ T3348] writeback_single_inode+0x7c/0x270 [ 66.818713][ T3348] write_inode_now+0xc1/0xe0 [ 66.823283][ T3348] hfs_file_fsync+0x30/0x70 [ 66.827764][ T3348] generic_file_write_iter+0x91/0xb0 [ 66.833032][ T3348] vfs_write+0x23d/0x2e0 [ 66.837256][ T3348] ksys_write+0x70/0xf0 [ 66.841394][ T3348] do_syscall_64+0x4c/0xa0 [ 66.845916][ T3348] ? clear_bhb_loop+0x60/0xb0 [ 66.850573][ T3348] ? clear_bhb_loop+0x60/0xb0 [ 66.855339][ T3348] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 66.861212][ T3348] RIP: 0033:0x7fdd7e79a0f9 [ 66.865613][ T3348] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 [ 66.885300][ T3348] RSP: 002b:00007fdd7e5ff028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 66.893700][ T3348] RAX: ffffffffffffffda RBX: 00007fdd7e9d5fa0 RCX: 00007fdd7e79a0f9 [ 66.901655][ T3348] RDX: 0000000000001006 RSI: 0000200000000940 RDI: 0000000000000008 [ 66.909633][ T3348] RBP: 00007fdd7e82cc7c R08: 0000000000000000 R09: 0000000000000000 [ 66.917587][ T3348] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 66.925539][ T3348] R13: 0000000000000000 R14: 00007fdd7e9d5fa0 R15: 00007fff4ece7208 [ 66.933508][ T3348] [ 66.949781][ T3351] set_capacity_and_notify: 15 callbacks suppressed [ 66.949785][ T3351] loop4: detected capacity change from 0 to 64 [ 66.972845][ T3354] loop4: detected capacity change from 0 to 64 [ 66.987492][ T3357] loop4: detected capacity change from 0 to 64 [ 67.020126][ T3360] loop4: detected capacity change from 0 to 64 [ 67.041477][ T3363] loop4: detected capacity change from 0 to 64 [ 67.060462][ T3366] loop4: detected capacity change from 0 to 64 [ 67.089469][ T3369] loop4: detected capacity change from 0 to 64 [ 67.107815][ T3372] loop4: detected capacity change from 0 to 64 [ 67.125703][ T3375] loop4: detected capacity change from 0 to 64 [ 67.149413][ T3378] loop4: detected capacity change from 0 to 64 [ 67.600262][ T2878] hfs: walked past end of dir 2026/06/21 16:15:17 executed programs: 212 [ 71.963072][ T4062] set_capacity_and_notify: 227 callbacks suppressed [ 71.963075][ T4062] loop4: detected capacity change from 0 to 64 [ 71.985891][ T4065] loop4: detected capacity change from 0 to 64 [ 72.009786][ T4068] loop4: detected capacity change from 0 to 64 [ 72.033303][ T4071] loop4: detected capacity change from 0 to 64 [ 72.053440][ T4074] loop4: detected capacity change from 0 to 64 [ 72.080028][ T4077] loop4: detected capacity change from 0 to 64 [ 72.102831][ T4080] loop4: detected capacity change from 0 to 64 [ 72.115305][ T2878] hfs: walked past end of dir [ 72.124753][ T4083] loop4: detected capacity change from 0 to 64 [ 72.150029][ T4086] loop4: detected capacity change from 0 to 64 [ 72.171729][ T4089] loop4: detected capacity change from 0 to 64 2026/06/21 16:15:22 executed programs: 449