./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2835576980 <...> DUID 00:04:7b:a2:e0:73:6b:5f:a9:8e:d4:f6:53:82:b5:31:a7:5e forked to background, child pid 4646 [ 32.340660][ T4647] 8021q: adding VLAN 0 to HW filter on device bond0 [ 32.351410][ T4647] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.91' (ECDSA) to the list of known hosts. execve("./syz-executor2835576980", ["./syz-executor2835576980"], 0x7ffeb2456830 /* 10 vars */) = 0 brk(NULL) = 0x555557540000 brk(0x555557540c40) = 0x555557540c40 arch_prctl(ARCH_SET_FS, 0x555557540300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2835576980", 4096) = 28 brk(0x555557561c40) = 0x555557561c40 brk(0x555557562000) = 0x555557562000 mprotect(0x7f3b57dff000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3b4f946000 write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 munmap(0x7f3b4f946000, 524288) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file2", 0777) = 0 mount("/dev/loop0", "./file2", "hfsplus", MS_POSIXACL|MS_LAZYTIME, "") = 0 openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 chdir("./file2") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 syzkaller login: [ 52.647584][ T5068] loop0: detected capacity change from 0 to 1024 [ 52.669130][ T5068] hfsplus: xattr searching failed [ 52.675022][ T5068] [ 52.677369][ T5068] ============================================ [ 52.683520][ T5068] WARNING: possible recursive locking detected [ 52.689674][ T5068] 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5 #0 Not tainted [ 52.696693][ T5068] -------------------------------------------- [ 52.702822][ T5068] syz-executor283/5068 is trying to acquire lock: [ 52.709211][ T5068] ffff88802a0c9548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x3a3/0x1560 [ 52.720095][ T5068] [ 52.720095][ T5068] but task is already holding lock: [ 52.727435][ T5068] ffff88802a0ca988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x280/0xbb0 [ 52.738539][ T5068] [ 52.738539][ T5068] other info that might help us debug this: [ 52.746577][ T5068] Possible unsafe locking scenario: [ 52.746577][ T5068] [ 52.754007][ T5068] CPU0 [ 52.757266][ T5068] ---- [ 52.760524][ T5068] lock(&HFSPLUS_I(inode)->extents_lock); [ 52.766306][ T5068] lock(&HFSPLUS_I(inode)->extents_lock); [ 52.772089][ T5068] [ 52.772089][ T5068] *** DEADLOCK *** [ 52.772089][ T5068] [ 52.780210][ T5068] May be due to missing lock nesting notation [ 52.780210][ T5068] [ 52.788506][ T5068] 4 locks held by syz-executor283/5068: [ 52.794027][ T5068] #0: ffff88802ba46460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 [ 52.803206][ T5068] #1: ffff88802a0cab80 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x1ec/0x2f0 [ 52.813530][ T5068] #2: ffff88802a0ca988 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x280/0xbb0 [ 52.825072][ T5068] #3: ffff8880215fb0f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xb6/0x4e0 [ 52.835076][ T5068] [ 52.835076][ T5068] stack backtrace: [ 52.840941][ T5068] CPU: 1 PID: 5068 Comm: syz-executor283 Not tainted 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5 #0 [ 52.851330][ T5068] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 52.861364][ T5068] Call Trace: [ 52.864628][ T5068] [ 52.867544][ T5068] dump_stack_lvl+0x1b1/0x290 [ 52.872222][ T5068] ? nf_tcp_handle_invalid+0x630/0x630 [ 52.877665][ T5068] ? panic+0x710/0x710 [ 52.881731][ T5068] ? lockdep_unlock+0x144/0x2e0 [ 52.886585][ T5068] ? print_tainted+0x141/0x160 [ 52.891347][ T5068] ? lockdep_print_held_locks+0x10f/0x1b0 [ 52.897062][ T5068] validate_chain+0x4843/0x6ae0 [ 52.901908][ T5068] ? stack_trace_save+0x104/0x1e0 [ 52.906920][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.912273][ T5068] ? check_noncircular+0x1aa/0x390 [ 52.917386][ T5068] ? add_chain_block+0x850/0x850 [ 52.922333][ T5068] ? lockdep_unlock+0x144/0x2e0 [ 52.927183][ T5068] ? lockdep_lock+0x290/0x290 [ 52.931848][ T5068] ? add_lock_to_list+0x1c7/0x2d0 [ 52.936888][ T5068] ? validate_chain+0x1478/0x6ae0 [ 52.941900][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.947255][ T5068] ? lockdep_unlock+0x144/0x2e0 [ 52.952087][ T5068] ? lockdep_lock+0x290/0x290 [ 52.956745][ T5068] ? add_lock_to_list+0x1c7/0x2d0 [ 52.961756][ T5068] ? validate_chain+0x1478/0x6ae0 [ 52.966772][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.972134][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.977516][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.982873][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.988229][ T5068] ? reacquire_held_locks+0x650/0x650 [ 52.993585][ T5068] ? lockdep_unlock+0x144/0x2e0 [ 52.998427][ T5068] ? lockdep_lock+0x290/0x290 [ 53.003195][ T5068] ? add_lock_to_list+0x1c7/0x2d0 [ 53.008228][ T5068] ? validate_chain+0x1478/0x6ae0 [ 53.013273][ T5068] ? validate_chain+0x177/0x6ae0 [ 53.018214][ T5068] ? finish_lock_switch+0x89/0x100 [ 53.023338][ T5068] ? reacquire_held_locks+0x650/0x650 [ 53.028722][ T5068] ? reacquire_held_locks+0x650/0x650 [ 53.034107][ T5068] ? validate_chain+0x177/0x6ae0 [ 53.039068][ T5068] ? mark_lock+0x9a/0x350 [ 53.043408][ T5068] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.049027][ T5068] ? reacquire_held_locks+0x650/0x650 [ 53.054385][ T5068] ? mark_lock+0x9a/0x350 [ 53.058697][ T5068] ? __lock_acquire+0x1292/0x1f60 [ 53.063710][ T5068] ? rcu_preempt_deferred_qs_irqrestore+0x849/0xc10 [ 53.070286][ T5068] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 53.076258][ T5068] ? print_irqtrace_events+0x220/0x220 [ 53.081702][ T5068] ? do_raw_spin_unlock+0x134/0x8a0 [ 53.086898][ T5068] ? _raw_spin_unlock_irqrestore+0x8b/0x120 [ 53.092777][ T5068] ? lockdep_hardirqs_on+0x8d/0x130 [ 53.097957][ T5068] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 53.103836][ T5068] ? _raw_spin_unlock+0x40/0x40 [ 53.108676][ T5068] ? rcu_preempt_deferred_qs_irqrestore+0x849/0xc10 [ 53.115271][ T5068] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.120888][ T5068] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 53.126865][ T5068] ? stack_trace_save+0x1e0/0x1e0 [ 53.131877][ T5068] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.137519][ T5068] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 53.143486][ T5068] ? rcu_lock_release+0x5/0x20 [ 53.148239][ T5068] ? read_lock_is_recursive+0x10/0x10 [ 53.153593][ T5068] ? rcu_lock_release+0x5/0x20 [ 53.158345][ T5068] ? __lock_acquire+0x1f60/0x1f60 [ 53.163351][ T5068] ? deref_stack_reg+0x17a/0x210 [ 53.168292][ T5068] ? preempt_count_add+0x8d/0x180 [ 53.173302][ T5068] ? register_lock_class+0xc2/0x930 [ 53.178483][ T5068] ? is_bpf_text_address+0x253/0x270 [ 53.183752][ T5068] ? is_dynamic_key+0x1f0/0x1f0 [ 53.188584][ T5068] ? mark_lock+0x9a/0x350 [ 53.192984][ T5068] __lock_acquire+0x1292/0x1f60 [ 53.197822][ T5068] lock_acquire+0x182/0x3c0 [ 53.202306][ T5068] ? hfsplus_get_block+0x3a3/0x1560 [ 53.207506][ T5068] ? read_lock_is_recursive+0x10/0x10 [ 53.212861][ T5068] ? __might_sleep+0xc0/0xc0 [ 53.217432][ T5068] ? register_lock_class+0xc2/0x930 [ 53.222611][ T5068] ? create_page_buffers+0x1c8/0x4b0 [ 53.227880][ T5068] ? block_read_full_folio+0x177/0xfa0 [ 53.233320][ T5068] ? filemap_read_folio+0x187/0x7d0 [ 53.238502][ T5068] ? do_read_cache_folio+0x2d3/0x790 [ 53.243773][ T5068] ? read_cache_page+0x56/0x270 [ 53.248608][ T5068] ? hfsplus_free_extents+0x17f/0xad0 [ 53.254257][ T5068] ? hfsplus_file_truncate+0x827/0xbb0 [ 53.259701][ T5068] ? is_dynamic_key+0x1f0/0x1f0 [ 53.264533][ T5068] ? path_openat+0x272b/0x2dd0 [ 53.269281][ T5068] __mutex_lock_common+0x1bd/0x26e0 [ 53.274465][ T5068] ? hfsplus_get_block+0x3a3/0x1560 [ 53.279644][ T5068] ? __lock_acquire+0x1292/0x1f60 [ 53.284671][ T5068] ? hfsplus_get_block+0x3a3/0x1560 [ 53.289849][ T5068] ? mutex_lock_io_nested+0x60/0x60 [ 53.295028][ T5068] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.300652][ T5068] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 53.306617][ T5068] ? create_page_buffers+0x1c8/0x4b0 [ 53.311882][ T5068] ? trace_lock_release+0x95/0x220 [ 53.316979][ T5068] mutex_lock_nested+0x17/0x20 [ 53.321732][ T5068] hfsplus_get_block+0x3a3/0x1560 [ 53.326740][ T5068] ? __lock_acquire+0x1f60/0x1f60 [ 53.331793][ T5068] ? hfsplus_ext_write_extent+0x1e0/0x1e0 [ 53.337495][ T5068] ? do_raw_spin_unlock+0x134/0x8a0 [ 53.342680][ T5068] ? create_page_buffers+0x244/0x4b0 [ 53.347950][ T5068] block_read_full_folio+0x3b3/0xfa0 [ 53.353222][ T5068] ? hfsplus_ext_write_extent+0x1e0/0x1e0 [ 53.358925][ T5068] ? block_is_partially_uptodate+0x620/0x620 [ 53.364890][ T5068] ? folio_add_lru+0x480/0x960 [ 53.369640][ T5068] filemap_read_folio+0x187/0x7d0 [ 53.374676][ T5068] ? folio_alloc+0x47/0x50 [ 53.379075][ T5068] ? hfsplus_writepage+0x30/0x30 [ 53.383995][ T5068] ? maybe_unlock_mmap_for_io+0x130/0x130 [ 53.389700][ T5068] ? __mutex_lock_common+0x45f/0x26e0 [ 53.395077][ T5068] ? mutex_lock_io_nested+0x60/0x60 [ 53.400274][ T5068] ? __mutex_lock_common+0x45f/0x26e0 [ 53.405674][ T5068] do_read_cache_folio+0x2d3/0x790 [ 53.410780][ T5068] ? hfsplus_writepage+0x30/0x30 [ 53.415705][ T5068] read_cache_page+0x56/0x270 [ 53.420428][ T5068] hfsplus_block_free+0x123/0x4e0 [ 53.425464][ T5068] ? trace_kmalloc+0x30/0xf0 [ 53.430049][ T5068] hfsplus_free_extents+0x17f/0xad0 [ 53.435251][ T5068] hfsplus_file_truncate+0x827/0xbb0 [ 53.440529][ T5068] ? unmap_mapping_range+0xf3/0x2a0 [ 53.445803][ T5068] ? hfsplus_add_extent+0x860/0x860 [ 53.451018][ T5068] ? unmap_mapping_range+0xf3/0x2a0 [ 53.456210][ T5068] ? unmap_mapping_pages+0x190/0x190 [ 53.461480][ T5068] ? current_time+0x1ea/0x300 [ 53.466148][ T5068] ? setattr_prepare+0x1fc/0xc10 [ 53.471106][ T5068] ? truncate_setsize+0xcb/0xf0 [ 53.475953][ T5068] hfsplus_setattr+0x1b8/0x280 [ 53.480731][ T5068] ? hfsplus_fileattr_set+0x330/0x330 [ 53.486104][ T5068] notify_change+0xe50/0x1100 [ 53.490784][ T5068] do_truncate+0x200/0x2f0 [ 53.495228][ T5068] ? put_page_bootmem+0x2d0/0x2d0 [ 53.500245][ T5068] ? ima_bprm_check+0x270/0x270 [ 53.505088][ T5068] path_openat+0x272b/0x2dd0 [ 53.509672][ T5068] ? do_filp_open+0x4f0/0x4f0 [ 53.514337][ T5068] do_filp_open+0x264/0x4f0 [ 53.518828][ T5068] ? vfs_tmpfile+0x490/0x490 [ 53.523413][ T5068] ? do_raw_spin_unlock+0x134/0x8a0 [ 53.528598][ T5068] ? _raw_spin_unlock+0x24/0x40 [ 53.533434][ T5068] ? alloc_fd+0x5a7/0x640 [ 53.537752][ T5068] do_sys_openat2+0x124/0x4e0 [ 53.542417][ T5068] ? do_raw_spin_unlock+0x134/0x8a0 [ 53.547611][ T5068] ? do_sys_open+0x220/0x220 [ 53.552195][ T5068] ? _raw_spin_unlock_irq+0x2a/0x40 [ 53.557387][ T5068] ? ptrace_notify+0x245/0x340 [ 53.562140][ T5068] __x64_sys_creat+0x11f/0x160 [ 53.566889][ T5068] ? __x64_compat_sys_openat+0x290/0x290 [ 53.572499][ T5068] ? syscall_enter_from_user_mode+0x2e/0x1d0 [ 53.578462][ T5068] ? syscall_enter_from_user_mode+0x86/0x1d0 [ 53.584419][ T5068] do_syscall_64+0x3d/0xb0 [ 53.588819][ T5068] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 53.594692][ T5068] RIP: 0033:0x7f3b57d92759 [ 53.599107][ T5068] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 53.618712][ T5068] RSP: 002b:00007fff3f81abd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 53.627124][ T5068] RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f3b57d92759 [ 53.635089][ T5068] RDX: 00007f3b57d50dd3 RSI: 0000000000000020 RDI: 0000000020000180 [ 53.643061][ T5068] RBP: 00007f3b57d51ff0 R08: 00000000000005cd R09: 0000000000000000 creat("./file2", 040) = 4 exit_group(0) = ? +++ exited with 0 +++ [ 53.6510