./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2956404802 <...> [ 29.006423][ T4650] dhcpcd-run-hook (4650) used greatest stack depth: 16320 bytes left forked to background, child pid 4646 [ 30.889471][ T4647] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.903145][ T4647] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.18' (ECDSA) to the list of known hosts. execve("./syz-executor2956404802", ["./syz-executor2956404802"], 0x7ffd5b56d8d0 /* 10 vars */) = 0 brk(NULL) = 0x555555878000 brk(0x555555878c40) = 0x555555878c40 arch_prctl(ARCH_SET_FS, 0x555555878300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2956404802", 4096) = 28 brk(0x555555899c40) = 0x555555899c40 brk(0x55555589a000) = 0x55555589a000 mprotect(0x7fe347831000, 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) = 0x7fe33f378000 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(0x7fe33f378000, 524288) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./bus", 0777) = 0 mount("/dev/loop0", "./bus", "hfsplus", MS_SYNCHRONOUS|MS_MANDLOCK, "") = 0 openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 chdir("./bus") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 syzkaller login: [ 53.194793][ T5075] loop0: detected capacity change from 0 to 1024 [ 53.205471][ T5075] ======================================================= [ 53.205471][ T5075] WARNING: The mand mount option has been deprecated and [ 53.205471][ T5075] and is ignored by this kernel. Remove the mand [ 53.205471][ T5075] option from the mount to silence this warning. [ 53.205471][ T5075] ======================================================= [ 53.261322][ T5075] [ 53.263707][ T5075] ============================================ [ 53.269880][ T5075] WARNING: possible recursive locking detected [ 53.276010][ T5075] 6.1.0-syzkaller-14587-g51094a24b85e #0 Not tainted [ 53.282672][ T5075] -------------------------------------------- [ 53.288806][ T5075] syz-executor295/5075 is trying to acquire lock: [ 53.295207][ T5075] ffff888029b99548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x3a3/0x1560 [ 53.306088][ T5075] [ 53.306088][ T5075] but task is already holding lock: [ 53.313437][ T5075] ffff888029b9b048 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x280/0xbb0 [ 53.324557][ T5075] [ 53.324557][ T5075] other info that might help us debug this: [ 53.332626][ T5075] Possible unsafe locking scenario: [ 53.332626][ T5075] [ 53.340255][ T5075] CPU0 [ 53.343546][ T5075] ---- [ 53.346813][ T5075] lock(&HFSPLUS_I(inode)->extents_lock); [ 53.352619][ T5075] lock(&HFSPLUS_I(inode)->extents_lock); [ 53.358420][ T5075] [ 53.358420][ T5075] *** DEADLOCK *** [ 53.358420][ T5075] [ 53.366553][ T5075] May be due to missing lock nesting notation [ 53.366553][ T5075] [ 53.374868][ T5075] 4 locks held by syz-executor295/5075: [ 53.380403][ T5075] #0: ffff888079b7a460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 [ 53.389543][ T5075] #1: ffff888029b9b240 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: do_truncate+0x1ec/0x2f0 [ 53.399920][ T5075] #2: ffff888029b9b048 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x280/0xbb0 [ 53.411482][ T5075] #3: ffff8880799fb8f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xb6/0x4e0 [ 53.421478][ T5075] [ 53.421478][ T5075] stack backtrace: [ 53.427349][ T5075] CPU: 0 PID: 5075 Comm: syz-executor295 Not tainted 6.1.0-syzkaller-14587-g51094a24b85e #0 [ 53.437399][ T5075] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 53.447442][ T5075] Call Trace: [ 53.450723][ T5075] [ 53.453656][ T5075] dump_stack_lvl+0x1b1/0x290 [ 53.458359][ T5075] ? nf_tcp_handle_invalid+0x630/0x630 [ 53.463821][ T5075] ? panic+0x710/0x710 [ 53.467883][ T5075] ? lockdep_unlock+0x144/0x2e0 [ 53.472818][ T5075] ? print_tainted+0x141/0x160 [ 53.477582][ T5075] ? lockdep_print_held_locks+0x10f/0x1b0 [ 53.483308][ T5075] validate_chain+0x4843/0x6ae0 [ 53.488163][ T5075] ? stack_trace_save+0x104/0x1e0 [ 53.493186][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.498550][ T5075] ? check_noncircular+0x1aa/0x390 [ 53.503658][ T5075] ? add_chain_block+0x850/0x850 [ 53.508591][ T5075] ? lockdep_unlock+0x144/0x2e0 [ 53.513432][ T5075] ? lockdep_lock+0x290/0x290 [ 53.518097][ T5075] ? add_lock_to_list+0x1c7/0x2d0 [ 53.523118][ T5075] ? validate_chain+0x1478/0x6ae0 [ 53.528229][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.533597][ T5075] ? lockdep_unlock+0x144/0x2e0 [ 53.538441][ T5075] ? lockdep_lock+0x290/0x290 [ 53.543104][ T5075] ? add_lock_to_list+0x1c7/0x2d0 [ 53.548121][ T5075] ? validate_chain+0x1478/0x6ae0 [ 53.553149][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.558512][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.563874][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.569241][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.574611][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.579996][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.585378][ T5075] ? lockdep_unlock+0x144/0x2e0 [ 53.590225][ T5075] ? lockdep_lock+0x290/0x290 [ 53.594892][ T5075] ? add_lock_to_list+0x1c7/0x2d0 [ 53.599921][ T5075] ? validate_chain+0x1478/0x6ae0 [ 53.604949][ T5075] ? validate_chain+0x177/0x6ae0 [ 53.609893][ T5075] ? finish_lock_switch+0x89/0x100 [ 53.615022][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.620394][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.625762][ T5075] ? validate_chain+0x177/0x6ae0 [ 53.630719][ T5075] ? mark_lock+0x9a/0x350 [ 53.635054][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.640683][ T5075] ? reacquire_held_locks+0x650/0x650 [ 53.646047][ T5075] ? mark_lock+0x9a/0x350 [ 53.650373][ T5075] ? __lock_acquire+0x1292/0x1f60 [ 53.655385][ T5075] ? rcu_preempt_deferred_qs_irqrestore+0x849/0xc10 [ 53.661964][ T5075] ? trace_lock_release+0x95/0x220 [ 53.667073][ T5075] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 53.673042][ T5075] ? print_irqtrace_events+0x220/0x220 [ 53.678491][ T5075] ? do_raw_spin_unlock+0x134/0x8a0 [ 53.683682][ T5075] ? _raw_spin_unlock_irqrestore+0x8b/0x120 [ 53.689585][ T5075] ? lockdep_hardirqs_on+0x8d/0x130 [ 53.694807][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.700450][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.706077][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 53.712060][ T5075] ? stack_trace_save+0x1e0/0x1e0 [ 53.717080][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.722709][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 53.728692][ T5075] ? rcu_lock_release+0x5/0x20 [ 53.733449][ T5075] ? read_lock_is_recursive+0x10/0x10 [ 53.738812][ T5075] ? rcu_lock_release+0x5/0x20 [ 53.743567][ T5075] ? __lock_acquire+0x1f60/0x1f60 [ 53.748584][ T5075] ? deref_stack_reg+0x17a/0x210 [ 53.753517][ T5075] ? preempt_count_add+0x8d/0x180 [ 53.758535][ T5075] ? register_lock_class+0xc2/0x930 [ 53.763721][ T5075] ? is_bpf_text_address+0x253/0x270 [ 53.768995][ T5075] ? is_dynamic_key+0x1f0/0x1f0 [ 53.773836][ T5075] ? mark_lock+0x9a/0x350 [ 53.778158][ T5075] __lock_acquire+0x1292/0x1f60 [ 53.783017][ T5075] lock_acquire+0x182/0x3c0 [ 53.787510][ T5075] ? hfsplus_get_block+0x3a3/0x1560 [ 53.792700][ T5075] ? read_lock_is_recursive+0x10/0x10 [ 53.798062][ T5075] ? __might_sleep+0xc0/0xc0 [ 53.802645][ T5075] ? register_lock_class+0xc2/0x930 [ 53.807838][ T5075] ? create_page_buffers+0x1c8/0x4b0 [ 53.813129][ T5075] ? block_read_full_folio+0x177/0xfa0 [ 53.818591][ T5075] ? filemap_read_folio+0x187/0x7d0 [ 53.823799][ T5075] ? do_read_cache_folio+0x2d3/0x790 [ 53.829089][ T5075] ? read_cache_page+0x56/0x270 [ 53.833952][ T5075] ? hfsplus_free_extents+0x17f/0xad0 [ 53.839325][ T5075] ? hfsplus_file_truncate+0x827/0xbb0 [ 53.844780][ T5075] ? is_dynamic_key+0x1f0/0x1f0 [ 53.849641][ T5075] ? path_openat+0x272b/0x2dd0 [ 53.854414][ T5075] __mutex_lock_common+0x1bd/0x26e0 [ 53.859612][ T5075] ? hfsplus_get_block+0x3a3/0x1560 [ 53.864818][ T5075] ? __lock_acquire+0x1292/0x1f60 [ 53.869936][ T5075] ? hfsplus_get_block+0x3a3/0x1560 [ 53.875139][ T5075] ? mutex_lock_io_nested+0x60/0x60 [ 53.880347][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 53.885980][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 53.891955][ T5075] ? create_page_buffers+0x1c8/0x4b0 [ 53.897232][ T5075] ? trace_lock_release+0x95/0x220 [ 53.902336][ T5075] mutex_lock_nested+0x17/0x20 [ 53.907096][ T5075] hfsplus_get_block+0x3a3/0x1560 [ 53.912126][ T5075] ? __lock_acquire+0x1f60/0x1f60 [ 53.917153][ T5075] ? hfsplus_ext_write_extent+0x1e0/0x1e0 [ 53.922864][ T5075] ? do_raw_spin_unlock+0x134/0x8a0 [ 53.928063][ T5075] ? create_page_buffers+0x244/0x4b0 [ 53.933343][ T5075] block_read_full_folio+0x3b3/0xfa0 [ 53.938639][ T5075] ? hfsplus_ext_write_extent+0x1e0/0x1e0 [ 53.944350][ T5075] ? block_is_partially_uptodate+0x620/0x620 [ 53.950325][ T5075] ? folio_add_lru+0x480/0x960 [ 53.955086][ T5075] filemap_read_folio+0x187/0x7d0 [ 53.960105][ T5075] ? folio_alloc+0x47/0x50 [ 53.964519][ T5075] ? hfsplus_writepage+0x30/0x30 [ 53.969461][ T5075] ? maybe_unlock_mmap_for_io+0x130/0x130 [ 53.975178][ T5075] ? __mutex_lock_common+0x45f/0x26e0 [ 53.980540][ T5075] ? mutex_lock_io_nested+0x60/0x60 [ 53.985737][ T5075] do_read_cache_folio+0x2d3/0x790 [ 53.990849][ T5075] ? hfsplus_writepage+0x30/0x30 [ 53.995780][ T5075] read_cache_page+0x56/0x270 [ 54.000450][ T5075] hfsplus_block_free+0x123/0x4e0 [ 54.005477][ T5075] ? trace_kmalloc+0x30/0xf0 [ 54.010068][ T5075] hfsplus_free_extents+0x17f/0xad0 [ 54.015264][ T5075] hfsplus_file_truncate+0x827/0xbb0 [ 54.020572][ T5075] ? unmap_mapping_range+0xf3/0x2a0 [ 54.025774][ T5075] ? hfsplus_add_extent+0x860/0x860 [ 54.030964][ T5075] ? unmap_mapping_range+0xf3/0x2a0 [ 54.036158][ T5075] ? unmap_mapping_pages+0x190/0x190 [ 54.041444][ T5075] ? current_time+0x1ea/0x300 [ 54.046114][ T5075] ? setattr_prepare+0x1fc/0xc10 [ 54.051047][ T5075] ? truncate_setsize+0xcb/0xf0 [ 54.055889][ T5075] hfsplus_setattr+0x1b8/0x280 [ 54.060645][ T5075] ? hfsplus_fileattr_set+0x330/0x330 [ 54.066008][ T5075] notify_change+0xe50/0x1100 [ 54.070684][ T5075] do_truncate+0x200/0x2f0 [ 54.075092][ T5075] ? put_page_bootmem+0x2d0/0x2d0 [ 54.080118][ T5075] ? ima_bprm_check+0x270/0x270 [ 54.084970][ T5075] path_openat+0x272b/0x2dd0 [ 54.089567][ T5075] ? do_filp_open+0x4f0/0x4f0 [ 54.094244][ T5075] do_filp_open+0x264/0x4f0 [ 54.098749][ T5075] ? vfs_tmpfile+0x490/0x490 [ 54.103346][ T5075] ? do_raw_spin_unlock+0x134/0x8a0 [ 54.108543][ T5075] ? _raw_spin_unlock+0x24/0x40 [ 54.113388][ T5075] ? alloc_fd+0x5a7/0x640 [ 54.117711][ T5075] do_sys_openat2+0x124/0x4e0 [ 54.122379][ T5075] ? do_raw_spin_unlock+0x134/0x8a0 [ 54.127570][ T5075] ? do_sys_open+0x220/0x220 [ 54.132236][ T5075] ? _raw_spin_unlock_irq+0x2a/0x40 [ 54.137427][ T5075] ? ptrace_notify+0x245/0x340 [ 54.142182][ T5075] __x64_sys_creat+0x11f/0x160 [ 54.146943][ T5075] ? __x64_compat_sys_openat+0x290/0x290 [ 54.152569][ T5075] ? syscall_enter_from_user_mode+0x2e/0x1d0 [ 54.158540][ T5075] ? syscall_enter_from_user_mode+0x86/0x1d0 [ 54.164512][ T5075] do_syscall_64+0x3d/0xb0 [ 54.168937][ T5075] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 54.174911][ T5075] RIP: 0033:0x7fe3477c4779 [ 54.179402][ T5075] 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 [ 54.199000][ T5075] RSP: 002b:00007ffe340ad788 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 54.207406][ T5075] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe3477c4779 creat("./file0/file0", 012) = 4 exit_group(0) = ? +++ exited with 0 +++ [ 5