./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4079989795 <...> Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. execve("./syz-executor4079989795", ["./syz-executor4079989795"], 0x7ffdfe77dba0 /* 10 vars */) = 0 brk(NULL) = 0x55555562f000 brk(0x55555562fc40) = 0x55555562fc40 arch_prctl(ARCH_SET_FS, 0x55555562f300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor4079989795", 4096) = 28 brk(0x555555650c40) = 0x555555650c40 brk(0x555555651000) = 0x555555651000 mprotect(0x7fa127a77000, 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 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5066 attached , child_tidptr=0x55555562f5d0) = 5066 [pid 5066] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5066] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5066] setsid() = 1 [pid 5066] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5066] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5066] unshare(CLONE_NEWNS) = 0 [pid 5066] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5066] unshare(CLONE_NEWIPC) = 0 [pid 5066] unshare(CLONE_NEWCGROUP) = 0 [pid 5066] unshare(CLONE_NEWUTS) = 0 [pid 5066] unshare(CLONE_SYSVSEM) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "16777216", 8) = 8 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "536870912", 9) = 9 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "8192", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024", 4) = 4 [pid 5066] close(3) = 0 [pid 5066] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5066] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5066] close(3) = 0 [pid 5066] getpid() = 1 [pid 5066] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<lcnbmp_lock){+.+.}-{3:3}, at: ntfs_put_super+0x36b/0xf80 [ 62.799819][ T5066] [ 62.799819][ T5066] which lock already depends on the new lock. [ 62.799819][ T5066] [ 62.810198][ T5066] [ 62.810198][ T5066] the existing dependency chain (in reverse order) is: [ 62.819206][ T5066] [ 62.819206][ T5066] -> #1 (&vol->lcnbmp_lock){+.+.}-{3:3}: [ 62.827003][ T5066] lock_acquire+0x182/0x3c0 [ 62.832010][ T5066] down_write+0x9c/0x270 [ 62.836841][ T5066] __ntfs_cluster_free+0xd4/0x890 [ 62.842453][ T5066] ntfs_truncate+0x119c/0x2720 [ 62.847731][ T5066] ntfs_setattr+0x2b9/0x3a0 [ 62.852732][ T5066] notify_change+0xe50/0x1100 [ 62.857906][ T5066] do_truncate+0x200/0x2f0 [ 62.862817][ T5066] path_openat+0x272b/0x2dd0 [ 62.867907][ T5066] do_file_open_root+0x339/0x790 [ 62.873347][ T5066] file_open_root+0x234/0x290 [ 62.878521][ T5066] do_handle_open+0x565/0x950 [ 62.883702][ T5066] do_syscall_64+0x3d/0xb0 [ 62.888619][ T5066] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 62.895018][ T5066] [ 62.895018][ T5066] -> #0 (&lcnbmp_mrec_lock_key){+.+.}-{3:3}: [ 62.903157][ T5066] validate_chain+0x1898/0x6ae0 [ 62.908508][ T5066] __lock_acquire+0x1292/0x1f60 [ 62.913876][ T5066] lock_acquire+0x182/0x3c0 [ 62.918876][ T5066] __mutex_lock_common+0x1bd/0x26e0 [ 62.924575][ T5066] mutex_lock_nested+0x17/0x20 [ 62.929837][ T5066] map_mft_record+0x46/0x610 [ 62.934943][ T5066] __ntfs_write_inode+0x80/0xc90 [ 62.940393][ T5066] ntfs_put_super+0x3ba/0xf80 [ 62.945576][ T5066] generic_shutdown_super+0x130/0x310 [ 62.951449][ T5066] kill_block_super+0x79/0xd0 [ 62.956622][ T5066] deactivate_locked_super+0xa7/0xf0 [ 62.962409][ T5066] cleanup_mnt+0x494/0x520 [ 62.967326][ T5066] task_work_run+0x243/0x300 [ 62.972420][ T5066] do_exit+0x644/0x2150 [ 62.977163][ T5066] do_group_exit+0x1fd/0x2b0 [ 62.982248][ T5066] __x64_sys_exit_group+0x3b/0x40 [ 62.987772][ T5066] do_syscall_64+0x3d/0xb0 [ 62.992694][ T5066] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 62.999098][ T5066] [ 62.999098][ T5066] other info that might help us debug this: [ 62.999098][ T5066] [ 63.009299][ T5066] Possible unsafe locking scenario: [ 63.009299][ T5066] [ 63.016719][ T5066] CPU0 CPU1 [ 63.022060][ T5066] ---- ---- [ 63.027401][ T5066] lock(&vol->lcnbmp_lock); [ 63.031967][ T5066] lock(&lcnbmp_mrec_lock_key); [ 63.039397][ T5066] lock(&vol->lcnbmp_lock); [ 63.046478][ T5066] lock(&lcnbmp_mrec_lock_key); [ 63.051389][ T5066] [ 63.051389][ T5066] *** DEADLOCK *** [ 63.051389][ T5066] [ 63.059509][ T5066] 2 locks held by syz-executor407/5066: [ 63.065024][ T5066] #0: ffff88802c0a20e0 (&type->s_umount_key#46){+.+.}-{3:3}, at: deactivate_super+0x96/0xd0 [ 63.075181][ T5066] #1: ffff8880297d51f8 (&vol->lcnbmp_lock){+.+.}-{3:3}, at: ntfs_put_super+0x36b/0xf80 [ 63.084895][ T5066] [ 63.084895][ T5066] stack backtrace: [ 63.090759][ T5066] CPU: 0 PID: 5066 Comm: syz-executor407 Not tainted 6.2.0-rc1-syzkaller-00095-ge4cf7c25bae5 #0 [ 63.101172][ T5066] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 63.111466][ T5066] Call Trace: [ 63.114729][ T5066] [ 63.117656][ T5066] dump_stack_lvl+0x1b1/0x290 [ 63.122320][ T5066] ? nf_tcp_handle_invalid+0x630/0x630 [ 63.127764][ T5066] ? print_circular_bug+0x13e/0x1c0 [ 63.133048][ T5066] check_noncircular+0x2cc/0x390 [ 63.137983][ T5066] ? add_chain_block+0x850/0x850 [ 63.142990][ T5066] ? lockdep_lock+0x102/0x290 [ 63.147678][ T5066] ? kernel_text_address+0x9e/0xd0 [ 63.152792][ T5066] ? __kernel_text_address+0x9/0x40 [ 63.158065][ T5066] ? _find_first_zero_bit+0xe8/0x110 [ 63.163351][ T5066] validate_chain+0x1898/0x6ae0 [ 63.168194][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.173552][ T5066] ? lockdep_unlock+0x144/0x2e0 [ 63.178382][ T5066] ? lockdep_lock+0x290/0x290 [ 63.183043][ T5066] ? add_lock_to_list+0x1c7/0x2d0 [ 63.188050][ T5066] ? validate_chain+0x1478/0x6ae0 [ 63.193063][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.198417][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.203771][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.209125][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.214571][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.219928][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.225464][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.230818][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.236172][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.241540][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.246893][ T5066] ? reacquire_held_locks+0x650/0x650 [ 63.252246][ T5066] ? validate_chain+0x177/0x6ae0 [ 63.257170][ T5066] ? rcu_read_lock_sched_held+0x87/0x110 [ 63.262785][ T5066] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 63.268765][ T5066] ? bad_range+0x88/0x2e0 [ 63.273081][ T5066] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 63.279044][ T5066] ? print_irqtrace_events+0x220/0x220 [ 63.284660][ T5066] ? seqcount_lockdep_reader_access+0x10e/0x190 [ 63.290980][ T5066] ? mark_lock+0x9a/0x350 [ 63.295294][ T5066] ? rcu_read_lock_sched_held+0x87/0x110 [ 63.300996][ T5066] ? rcu_lock_release+0x5/0x20 [ 63.305757][ T5066] ? rcu_read_lock_sched_held+0x87/0x110 [ 63.311374][ T5066] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 63.317358][ T5066] ? finish_lock_switch+0x89/0x100 [ 63.322453][ T5066] ? trace_lock_release+0x95/0x220 [ 63.327547][ T5066] ? mark_lock+0x9a/0x350 [ 63.331945][ T5066] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 63.337995][ T5066] ? print_irqtrace_events+0x220/0x220 [ 63.343438][ T5066] ? do_raw_spin_unlock+0x134/0x8a0 [ 63.348621][ T5066] ? finish_lock_switch+0x8e/0x100 [ 63.353827][ T5066] ? lockdep_hardirqs_on+0x8d/0x130 [ 63.359192][ T5066] ? finish_lock_switch+0x8e/0x100 [ 63.364361][ T5066] ? finish_task_switch+0x140/0x610 [ 63.369576][ T5066] ? __switch_to_asm+0x34/0x60 [ 63.374365][ T5066] ? stack_trace_save+0x1e0/0x1e0 [ 63.379388][ T5066] ? rcu_read_lock_sched_held+0x87/0x110 [ 63.385095][ T5066] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 63.391065][ T5066] ? rcu_read_lock_sched_held+0x87/0x110 [ 63.396693][ T5066] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 63.402664][ T5066] ? __stack_depot_save+0x41c/0x4a0 [ 63.407858][ T5066] ? trace_lock_release+0x95/0x220 [ 63.412977][ T5066] ? mark_lock+0x9a/0x350 [ 63.417290][ T5066] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 63.423290][ T5066] ? mark_lock+0x9a/0x350 [ 63.427607][ T5066] __lock_acquire+0x1292/0x1f60 [ 63.432530][ T5066] lock_acquire+0x182/0x3c0 [ 63.437016][ T5066] ? map_mft_record+0x46/0x610 [ 63.441778][ T5066] ? read_lock_is_recursive+0x10/0x10 [ 63.447132][ T5066] ? __might_sleep+0xc0/0xc0 [ 63.451702][ T5066] ? unmap_mft_record+0x98/0xd0 [ 63.456537][ T5066] ? mark_lock+0x9a/0x350 [ 63.460873][ T5066] __mutex_lock_common+0x1bd/0x26e0 [ 63.466062][ T5066] ? map_mft_record+0x46/0x610 [ 63.470816][ T5066] ? map_mft_record+0x46/0x610 [ 63.475659][ T5066] ? mutex_lock_io_nested+0x60/0x60 [ 63.480851][ T5066] ? read_lock_is_recursive+0x10/0x10 [ 63.486303][ T5066] ? __might_sleep+0xc0/0xc0 [ 63.490976][ T5066] ? mutex_unlock+0x10/0x10 [ 63.495464][ T5066] mutex_lock_nested+0x17/0x20 [ 63.500298][ T5066] map_mft_record+0x46/0x610 [ 63.504877][ T5066] __ntfs_write_inode+0x80/0xc90 [ 63.509887][ T5066] ntfs_put_super+0x3ba/0xf80 [ 63.514634][ T5066] ? clear_inode+0x150/0x150 [ 63.519204][ T5066] ? fscrypt_destroy_keyring+0x285/0x2a0 [ 63.524821][ T5066] ? ntfs_write_inode+0x70/0x70 [ 63.529661][ T5066] generic_shutdown_super+0x130/0x310 [ 63.535017][ T5066] kill_block_super+0x79/0xd0 [ 63.539671][ T5066] deactivate_locked_super+0xa7/0xf0 [ 63.544936][ T5066] cleanup_mnt+0x494/0x520 [ 63.549330][ T5066] ? lockdep_hardirqs_on+0x8d/0x130 [ 63.554506][ T5066] task_work_run+0x243/0x300 [ 63.559081][ T5066] ? task_work_cancel+0x290/0x290 [ 63.564086][ T5066] ? do_exit+0x63f/0x2150 [ 63.568401][ T5066] do_exit+0x644/0x2150 [ 63.572538][ T5066] ? mm_update_next_owner+0x6d0/0x6d0 [ 63.577894][ T5066] ? print_irqtrace_events+0x220/0x220 [ 63.583339][ T5066] ? _raw_spin_unlock_irq+0x1f/0x40 [ 63.588606][ T5066] ? lockdep_hardirqs_on+0x8d/0x130 [ 63.593806][ T5066] do_group_exit+0x1fd/0x2b0 [ 63.598378][ T5066] __x64_sys_exit_group+0x3b/0x40 [ 63.603389][ T5066] do_syscall_64+0x3d/0xb0 [ 63.607794][ T5066] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 63.613669][ T5066] RIP: 0033:0x7fa1279e8a09 [ 63.618062][ T5066] Code: Unable to access opcode bytes at 0x7fa1279e89df. [ 63.625054][ T5066] RSP: 002b:00007fffb1d6d4f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [pid 5066] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5066, si_uid=0, si_status=1, si_utime=0, si_stime=9 /* 0.09 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 63.633456][ T5066] RAX: ffffffffffffffda RBX: 00007fa127a7d330 RCX: 00007fa1279e8a