./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1543140350 <...> Warning: Permanently added '10.128.1.68' (ECDSA) to the list of known hosts. execve("./syz-executor1543140350", ["./syz-executor1543140350"], 0x7fffc6640890 /* 10 vars */) = 0 brk(NULL) = 0x555555681000 brk(0x555555681c40) = 0x555555681c40 arch_prctl(ARCH_SET_FS, 0x555555681300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1543140350", 4096) = 28 brk(0x5555556a2c40) = 0x5555556a2c40 brk(0x5555556a3000) = 0x5555556a3000 mprotect(0x7f1316f4d000, 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 5075 attached , child_tidptr=0x5555556815d0) = 5075 [pid 5075] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5075] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5075] setsid() = 1 [pid 5075] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5075] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5075] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5075] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5075] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5075] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5075] unshare(CLONE_NEWNS) = 0 [pid 5075] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5075] unshare(CLONE_NEWIPC) = 0 [pid 5075] unshare(CLONE_NEWCGROUP) = 0 [pid 5075] unshare(CLONE_NEWUTS) = 0 [pid 5075] unshare(CLONE_SYSVSEM) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "16777216", 8) = 8 [pid 5075] close(3) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "536870912", 9) = 9 [pid 5075] close(3) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "1024", 4) = 4 [pid 5075] close(3) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "8192", 4) = 4 [pid 5075] close(3) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "1024", 4) = 4 [pid 5075] close(3) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "1024", 4) = 4 [pid 5075] close(3) = 0 [pid 5075] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5075] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5075] close(3) = 0 [pid 5075] getpid() = 1 [pid 5075] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<lcnbmp_lock){+.+.}-{3:3}, at: ntfs_put_super+0x36b/0xf80 [ 50.173438][ T5075] [ 50.173438][ T5075] which lock already depends on the new lock. [ 50.173438][ T5075] [ 50.183821][ T5075] [ 50.183821][ T5075] the existing dependency chain (in reverse order) is: [ 50.192816][ T5075] [ 50.192816][ T5075] -> #1 (&vol->lcnbmp_lock){+.+.}-{3:3}: [ 50.200617][ T5075] lock_acquire+0x182/0x3c0 [ 50.205633][ T5075] down_write+0x9c/0x270 [ 50.210388][ T5075] __ntfs_cluster_free+0xd4/0x890 [ 50.215922][ T5075] ntfs_truncate+0x119c/0x2720 [ 50.221195][ T5075] ntfs_setattr+0x2b9/0x3a0 [ 50.226208][ T5075] notify_change+0xe50/0x1100 [ 50.231393][ T5075] do_truncate+0x200/0x2f0 [ 50.236322][ T5075] path_openat+0x272b/0x2dd0 [ 50.241427][ T5075] do_file_open_root+0x339/0x790 [ 50.246875][ T5075] file_open_root+0x234/0x290 [ 50.252060][ T5075] do_handle_open+0x565/0x950 [ 50.257245][ T5075] do_syscall_64+0x3d/0xb0 [ 50.262173][ T5075] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.268577][ T5075] [ 50.268577][ T5075] -> #0 (&lcnbmp_mrec_lock_key){+.+.}-{3:3}: [ 50.276725][ T5075] validate_chain+0x1898/0x6ae0 [ 50.282085][ T5075] __lock_acquire+0x1292/0x1f60 [ 50.287446][ T5075] lock_acquire+0x182/0x3c0 [ 50.292454][ T5075] __mutex_lock_common+0x1bd/0x26e0 [ 50.298161][ T5075] mutex_lock_nested+0x17/0x20 [ 50.303430][ T5075] map_mft_record+0x46/0x610 [ 50.308527][ T5075] __ntfs_write_inode+0x80/0xc90 [ 50.313971][ T5075] ntfs_put_super+0x3ba/0xf80 [ 50.319165][ T5075] generic_shutdown_super+0x130/0x310 [ 50.325046][ T5075] kill_block_super+0x79/0xd0 [ 50.330227][ T5075] deactivate_locked_super+0xa7/0xf0 [ 50.336027][ T5075] cleanup_mnt+0x494/0x520 [ 50.340949][ T5075] task_work_run+0x243/0x300 [ 50.346049][ T5075] do_exit+0x644/0x2150 [ 50.350718][ T5075] do_group_exit+0x1fd/0x2b0 [ 50.355901][ T5075] __x64_sys_exit_group+0x3b/0x40 [ 50.361431][ T5075] do_syscall_64+0x3d/0xb0 [ 50.366379][ T5075] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.372786][ T5075] [ 50.372786][ T5075] other info that might help us debug this: [ 50.372786][ T5075] [ 50.382998][ T5075] Possible unsafe locking scenario: [ 50.382998][ T5075] [ 50.390438][ T5075] CPU0 CPU1 [ 50.395786][ T5075] ---- ---- [ 50.401138][ T5075] lock(&vol->lcnbmp_lock); [ 50.405718][ T5075] lock(&lcnbmp_mrec_lock_key); [ 50.413163][ T5075] lock(&vol->lcnbmp_lock); [ 50.420257][ T5075] lock(&lcnbmp_mrec_lock_key); [ 50.425186][ T5075] [ 50.425186][ T5075] *** DEADLOCK *** [ 50.425186][ T5075] [ 50.433315][ T5075] 2 locks held by syz-executor154/5075: [ 50.438852][ T5075] #0: ffff88807a03e0e0 (&type->s_umount_key#46){+.+.}-{3:3}, at: deactivate_super+0x96/0xd0 [ 50.449129][ T5075] #1: ffff88802ac261f8 (&vol->lcnbmp_lock){+.+.}-{3:3}, at: ntfs_put_super+0x36b/0xf80 [ 50.458861][ T5075] [ 50.458861][ T5075] stack backtrace: [ 50.464733][ T5075] CPU: 1 PID: 5075 Comm: syz-executor154 Not tainted 6.2.0-rc1-syzkaller-00043-g2258c2dc850b #0 [ 50.475127][ T5075] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 50.485171][ T5075] Call Trace: [ 50.488442][ T5075] [ 50.491367][ T5075] dump_stack_lvl+0x1b1/0x290 [ 50.496040][ T5075] ? nf_tcp_handle_invalid+0x630/0x630 [ 50.501494][ T5075] ? print_circular_bug+0x13e/0x1c0 [ 50.506686][ T5075] check_noncircular+0x2cc/0x390 [ 50.511619][ T5075] ? add_chain_block+0x850/0x850 [ 50.516548][ T5075] ? lockdep_lock+0x102/0x290 [ 50.521215][ T5075] ? kernel_text_address+0x9e/0xd0 [ 50.526328][ T5075] ? __kernel_text_address+0x9/0x40 [ 50.531520][ T5075] ? _find_first_zero_bit+0xe8/0x110 [ 50.536797][ T5075] validate_chain+0x1898/0x6ae0 [ 50.541649][ T5075] ? reacquire_held_locks+0x650/0x650 [ 50.547031][ T5075] ? lockdep_unlock+0x144/0x2e0 [ 50.551871][ T5075] ? lockdep_lock+0x290/0x290 [ 50.556536][ T5075] ? add_lock_to_list+0x1c7/0x2d0 [ 50.561552][ T5075] ? validate_chain+0x1478/0x6ae0 [ 50.566589][ T5075] ? reacquire_held_locks+0x650/0x650 [ 50.571955][ T5075] ? reacquire_held_locks+0x650/0x650 [ 50.577325][ T5075] ? reacquire_held_locks+0x650/0x650 [ 50.582685][ T5075] ? reacquire_held_locks+0x650/0x650 [ 50.588048][ T5075] ? reacquire_held_locks+0x650/0x650 [ 50.593415][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.599038][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 50.605004][ T5075] ? cpufreq_update_util+0x8a/0x240 [ 50.610192][ T5075] ? detach_entity_load_avg+0x3e5/0x490 [ 50.615735][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.621357][ T5075] ? bad_range+0x88/0x2e0 [ 50.625681][ T5075] ? mark_lock+0x9a/0x350 [ 50.630003][ T5075] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 50.635976][ T5075] ? mark_lock+0x9a/0x350 [ 50.640294][ T5075] ? __lock_acquire+0x1292/0x1f60 [ 50.645315][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.650944][ T5075] ? rcu_lock_release+0x5/0x20 [ 50.655698][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.661340][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.666963][ T5075] ? stack_trace_save+0x1e0/0x1e0 [ 50.671984][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.677611][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 50.683581][ T5075] ? rcu_lock_release+0x5/0x20 [ 50.688340][ T5075] ? trace_lock_release+0x95/0x220 [ 50.693440][ T5075] ? lock_release+0x81/0x820 [ 50.698018][ T5075] ? read_lock_is_recursive+0x10/0x10 [ 50.703376][ T5075] ? deref_stack_reg+0x17a/0x210 [ 50.708366][ T5075] ? stack_trace_save+0x1e0/0x1e0 [ 50.713379][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.719006][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 50.724983][ T5075] ? rcu_read_lock_sched_held+0x87/0x110 [ 50.730617][ T5075] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 50.736590][ T5075] ? __stack_depot_save+0x41c/0x4a0 [ 50.741778][ T5075] ? trace_lock_release+0x95/0x220 [ 50.746879][ T5075] ? mark_lock+0x9a/0x350 [ 50.751199][ T5075] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 50.757170][ T5075] ? mark_lock+0x9a/0x350 [ 50.761583][ T5075] __lock_acquire+0x1292/0x1f60 [ 50.766432][ T5075] lock_acquire+0x182/0x3c0 [ 50.770926][ T5075] ? map_mft_record+0x46/0x610 [ 50.775679][ T5075] ? read_lock_is_recursive+0x10/0x10 [ 50.781039][ T5075] ? __might_sleep+0xc0/0xc0 [ 50.785617][ T5075] ? unmap_mft_record+0x98/0xd0 [ 50.790542][ T5075] ? mark_lock+0x9a/0x350 [ 50.794861][ T5075] __mutex_lock_common+0x1bd/0x26e0 [ 50.800049][ T5075] ? map_mft_record+0x46/0x610 [ 50.804804][ T5075] ? map_mft_record+0x46/0x610 [ 50.809561][ T5075] ? mutex_lock_io_nested+0x60/0x60 [ 50.814749][ T5075] ? read_lock_is_recursive+0x10/0x10 [ 50.820109][ T5075] ? __might_sleep+0xc0/0xc0 [ 50.824688][ T5075] ? mutex_unlock+0x10/0x10 [ 50.829183][ T5075] mutex_lock_nested+0x17/0x20 [ 50.833937][ T5075] map_mft_record+0x46/0x610 [ 50.838520][ T5075] __ntfs_write_inode+0x80/0xc90 [ 50.843448][ T5075] ntfs_put_super+0x3ba/0xf80 [ 50.848117][ T5075] ? clear_inode+0x150/0x150 [ 50.852692][ T5075] ? fscrypt_destroy_keyring+0x285/0x2a0 [ 50.858327][ T5075] ? ntfs_write_inode+0x70/0x70 [ 50.863169][ T5075] generic_shutdown_super+0x130/0x310 [ 50.868536][ T5075] kill_block_super+0x79/0xd0 [ 50.873201][ T5075] deactivate_locked_super+0xa7/0xf0 [ 50.878479][ T5075] cleanup_mnt+0x494/0x520 [ 50.882885][ T5075] ? lockdep_hardirqs_on+0x8d/0x130 [ 50.888074][ T5075] task_work_run+0x243/0x300 [ 50.892660][ T5075] ? task_work_cancel+0x290/0x290 [ 50.897682][ T5075] ? do_exit+0x63f/0x2150 [ 50.902008][ T5075] do_exit+0x644/0x2150 [ 50.906161][ T5075] ? mm_update_next_owner+0x6d0/0x6d0 [ 50.911523][ T5075] ? print_irqtrace_events+0x220/0x220 [ 50.916974][ T5075] ? _raw_spin_unlock_irq+0x1f/0x40 [ 50.922168][ T5075] ? lockdep_hardirqs_on+0x8d/0x130 [ 50.927364][ T5075] do_group_exit+0x1fd/0x2b0 [ 50.931943][ T5075] __x64_sys_exit_group+0x3b/0x40 [ 50.936960][ T5075] do_syscall_64+0x3d/0xb0 [ 50.941371][ T5075] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 50.947268][ T5075] RIP: 0033:0x7f1316ebea09 [ 50.951676][ T5075] Code: Unable to access opcode bytes at 0x7f1316ebe9df. [pid 5075] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5075, si_uid=0, si_status=1, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} --- exit_group(0) = ? +++ exited with 0 +++ [ 50.958677][ T5075] RSP: 002b:00007ffe53bdb118 EFLAGS: 0000