./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor139319626 <...> Warning: Permanently added '10.128.1.10' (ECDSA) to the list of known hosts. execve("./syz-executor139319626", ["./syz-executor139319626"], 0x7ffdcc6456b0 /* 10 vars */) = 0 brk(NULL) = 0x555556a1c000 brk(0x555556a1cc40) = 0x555556a1cc40 arch_prctl(ARCH_SET_FS, 0x555556a1c300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor139319626", 4096) = 27 brk(0x555556a3dc40) = 0x555556a3dc40 brk(0x555556a3e000) = 0x555556a3e000 mprotect(0x7f9c2c6e0000, 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 ftruncate(3, 4194304) = 0 mmap(NULL, 4194304, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0x7f9c2c226000 munmap(0x7f9c2c226000, 4194304) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 mkdir("./file0", 0777) = 0 syzkaller login: [ 53.627003][ T3633] loop0: detected capacity change from 0 to 8192 [ 53.638330][ T3633] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 53.651498][ T3633] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 53.660801][ T3633] REISERFS (device loop0): using ordered data mode [ 53.667306][ T3633] reiserfs: using flush barriers [ 53.673756][ T3633] REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 [ 53.690244][ T3633] REISERFS (device loop0): checking transaction log (loop0) mount("/dev/loop0", "./file0", "reiserfs", 0, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 5 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 close(3) = 0 creat("./bus", 000) = 3 [ 53.734575][ T3633] REISERFS (device loop0): Using tea hash to sort names [ 53.742384][ T3633] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 53.756810][ T3633] [ 53.759143][ T3633] ====================================================== [ 53.766152][ T3633] WARNING: possible circular locking dependency detected [ 53.773164][ T3633] 6.1.0-rc6-syzkaller #0 Not tainted [ 53.778438][ T3633] ------------------------------------------------------ [ 53.785442][ T3633] syz-executor139/3633 is trying to acquire lock: [ 53.791839][ T3633] ffff888026b18460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 [ 53.801071][ T3633] [ 53.801071][ T3633] but task is already holding lock: [ 53.808416][ T3633] ffff88801f89c090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x77/0xd0 [ 53.817363][ T3633] [ 53.817363][ T3633] which lock already depends on the new lock. [ 53.817363][ T3633] [ 53.827832][ T3633] [ 53.827832][ T3633] the existing dependency chain (in reverse order) is: [ 53.836825][ T3633] [ 53.836825][ T3633] -> #2 (&sbi->lock){+.+.}-{3:3}: [ 53.844018][ T3633] lock_acquire+0x182/0x3c0 [ 53.849030][ T3633] __mutex_lock_common+0x1bd/0x26e0 [ 53.854746][ T3633] mutex_lock_nested+0x17/0x20 [ 53.860021][ T3633] reiserfs_write_lock+0x77/0xd0 [ 53.865468][ T3633] reiserfs_lookup+0x147/0x490 [ 53.870743][ T3633] __lookup_slow+0x266/0x3a0 [ 53.875842][ T3633] lookup_one_len+0x430/0x690 [ 53.881025][ T3633] reiserfs_lookup_privroot+0x85/0x1e0 [ 53.887163][ T3633] reiserfs_fill_super+0x2071/0x24a0 [ 53.892960][ T3633] mount_bdev+0x26c/0x3a0 [ 53.897803][ T3633] legacy_get_tree+0xea/0x180 [ 53.902991][ T3633] vfs_get_tree+0x88/0x270 [ 53.907911][ T3633] do_new_mount+0x289/0xad0 [ 53.912923][ T3633] __se_sys_mount+0x2d3/0x3c0 [ 53.918107][ T3633] do_syscall_64+0x3d/0xb0 [ 53.923033][ T3633] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 53.929436][ T3633] [ 53.929436][ T3633] -> #1 (&type->i_mutex_dir_key#6){+.+.}-{3:3}: [ 53.937851][ T3633] lock_acquire+0x182/0x3c0 [ 53.942862][ T3633] down_write+0x9c/0x270 [ 53.947617][ T3633] path_openat+0x7b9/0x2df0 [ 53.952625][ T3633] do_filp_open+0x264/0x4f0 [ 53.957634][ T3633] do_sys_openat2+0x124/0x4e0 [ 53.962819][ T3633] __x64_sys_creat+0x11f/0x160 [ 53.968092][ T3633] do_syscall_64+0x3d/0xb0 [ 53.973017][ T3633] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 53.979417][ T3633] [ 53.979417][ T3633] -> #0 (sb_writers#9){.+.+}-{0:0}: [ 53.986790][ T3633] validate_chain+0x1898/0x6ae0 [ 53.992147][ T3633] __lock_acquire+0x1292/0x1f60 [ 53.997511][ T3633] lock_acquire+0x182/0x3c0 [ 54.002544][ T3633] sb_start_write+0x4d/0x1a0 [ 54.007646][ T3633] mnt_want_write_file+0x5a/0x1f0 [ 54.013180][ T3633] reiserfs_ioctl+0x16e/0x340 [ 54.018365][ T3633] __se_sys_ioctl+0xfb/0x170 [ 54.023467][ T3633] do_syscall_64+0x3d/0xb0 [ 54.028395][ T3633] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 54.034813][ T3633] [ 54.034813][ T3633] other info that might help us debug this: [ 54.034813][ T3633] [ 54.045022][ T3633] Chain exists of: [ 54.045022][ T3633] sb_writers#9 --> &type->i_mutex_dir_key#6 --> &sbi->lock [ 54.045022][ T3633] [ 54.058138][ T3633] Possible unsafe locking scenario: [ 54.058138][ T3633] [ 54.065567][ T3633] CPU0 CPU1 [ 54.070914][ T3633] ---- ---- [ 54.076263][ T3633] lock(&sbi->lock); [ 54.080230][ T3633] lock(&type->i_mutex_dir_key#6); [ 54.087937][ T3633] lock(&sbi->lock); [ 54.094424][ T3633] lock(sb_writers#9); [ 54.098576][ T3633] [ 54.098576][ T3633] *** DEADLOCK *** [ 54.098576][ T3633] [ 54.106700][ T3633] 1 lock held by syz-executor139/3633: [ 54.112141][ T3633] #0: ffff88801f89c090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x77/0xd0 [ 54.121529][ T3633] [ 54.121529][ T3633] stack backtrace: [ 54.127398][ T3633] CPU: 1 PID: 3633 Comm: syz-executor139 Not tainted 6.1.0-rc6-syzkaller #0 [ 54.136064][ T3633] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 54.146111][ T3633] Call Trace: [ 54.149386][ T3633] [ 54.152309][ T3633] dump_stack_lvl+0x1b1/0x28e [ 54.156993][ T3633] ? nf_tcp_handle_invalid+0x62e/0x62e [ 54.162451][ T3633] ? print_circular_bug+0x13e/0x1c0 [ 54.167652][ T3633] check_noncircular+0x2cc/0x390 [ 54.172593][ T3633] ? add_chain_block+0x850/0x850 [ 54.177526][ T3633] ? lockdep_lock+0x102/0x290 [ 54.182190][ T3633] ? reacquire_held_locks+0x650/0x650 [ 54.187552][ T3633] ? _find_first_zero_bit+0xe8/0x110 [ 54.192917][ T3633] validate_chain+0x1898/0x6ae0 [ 54.197770][ T3633] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.203395][ T3633] ? reacquire_held_locks+0x650/0x650 [ 54.208763][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.213777][ T3633] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.219396][ T3633] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 54.225368][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.230120][ T3633] ? trace_lock_release+0x95/0x220 [ 54.235227][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.239982][ T3633] ? lock_release+0x81/0x820 [ 54.244570][ T3633] ? read_lock_is_recursive+0x10/0x10 [ 54.250017][ T3633] ? deref_stack_reg+0x17a/0x210 [ 54.254944][ T3633] ? __lock_acquire+0x1f60/0x1f60 [ 54.259960][ T3633] ? unwind_next_frame+0x1b06/0x24c0 [ 54.265232][ T3633] ? deref_stack_reg+0x17a/0x210 [ 54.270157][ T3633] ? preempt_count_add+0x8d/0x180 [ 54.275178][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.280192][ T3633] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.285810][ T3633] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 54.291778][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.296541][ T3633] ? read_lock_is_recursive+0x10/0x10 [ 54.301986][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.306738][ T3633] ? __lock_acquire+0x1f60/0x1f60 [ 54.311752][ T3633] ? deref_stack_reg+0x17a/0x210 [ 54.316676][ T3633] ? preempt_count_add+0x8d/0x180 [ 54.321703][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.326742][ T3633] ? is_bpf_text_address+0x253/0x270 [ 54.332025][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.337142][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.342251][ T3633] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.347877][ T3633] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 54.353853][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.358616][ T3633] ? read_lock_is_recursive+0x10/0x10 [ 54.363986][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.368742][ T3633] ? __lock_acquire+0x1f60/0x1f60 [ 54.373758][ T3633] ? deref_stack_reg+0x17a/0x210 [ 54.378690][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.383705][ T3633] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.389328][ T3633] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 54.395298][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.400054][ T3633] ? read_lock_is_recursive+0x10/0x10 [ 54.405502][ T3633] ? rcu_lock_release+0x5/0x20 [ 54.410255][ T3633] ? __lock_acquire+0x1f60/0x1f60 [ 54.415357][ T3633] ? deref_stack_reg+0x17a/0x210 [ 54.420283][ T3633] ? preempt_count_add+0x8d/0x180 [ 54.425307][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.430319][ T3633] ? is_bpf_text_address+0x253/0x270 [ 54.435589][ T3633] ? stack_trace_save+0x1e0/0x1e0 [ 54.440601][ T3633] ? kernel_text_address+0x9e/0xd0 [ 54.445705][ T3633] ? __kernel_text_address+0x9/0x40 [ 54.450893][ T3633] ? unwind_get_return_address+0x48/0x80 [ 54.456513][ T3633] ? arch_stack_walk+0x98/0xe0 [ 54.461269][ T3633] ? stack_trace_save+0x104/0x1e0 [ 54.466282][ T3633] ? stack_trace_snprint+0xf0/0xf0 [ 54.471381][ T3633] ? __kmem_cache_free+0x71/0x110 [ 54.476394][ T3633] ? __stack_depot_save+0x36/0x4a0 [ 54.481503][ T3633] ? __kmem_cache_free+0x71/0x110 [ 54.486518][ T3633] ? kasan_set_track+0x52/0x60 [ 54.491265][ T3633] ? kasan_set_track+0x3d/0x60 [ 54.496014][ T3633] ? kasan_save_free_info+0x27/0x40 [ 54.501199][ T3633] ? ____kasan_slab_free+0xd6/0x120 [ 54.506384][ T3633] ? slab_free_freelist_hook+0x12e/0x1a0 [ 54.512006][ T3633] ? __kmem_cache_free+0x71/0x110 [ 54.517017][ T3633] ? tomoyo_path_number_perm+0x59e/0x760 [ 54.522643][ T3633] ? security_file_ioctl+0x55/0xb0 [ 54.527746][ T3633] ? __se_sys_ioctl+0x48/0x170 [ 54.532496][ T3633] ? do_syscall_64+0x3d/0xb0 [ 54.537073][ T3633] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 54.543137][ T3633] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 54.549111][ T3633] ? rcu_read_lock_sched_held+0x87/0x110 [ 54.554737][ T3633] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 54.560701][ T3633] ? _raw_spin_unlock_irqrestore+0xc1/0x120 [ 54.566581][ T3633] ? lockdep_hardirqs_on_prepare+0x428/0x790 [ 54.572548][ T3633] ? mark_lock+0x9a/0x350 [ 54.576868][ T3633] ? __lock_acquire+0x1292/0x1f60 [ 54.581890][ T3633] ? mark_lock+0x9a/0x350 [ 54.586210][ T3633] __lock_acquire+0x1292/0x1f60 [ 54.591059][ T3633] lock_acquire+0x182/0x3c0 [ 54.595550][ T3633] ? mnt_want_write_file+0x5a/0x1f0 [ 54.600744][ T3633] ? read_lock_is_recursive+0x10/0x10 [ 54.606108][ T3633] ? __might_sleep+0xc0/0xc0 [ 54.610692][ T3633] ? mutex_lock_io_nested+0x60/0x60 [ 54.615888][ T3633] sb_start_write+0x4d/0x1a0 [ 54.620473][ T3633] ? mnt_want_write_file+0x5a/0x1f0 [ 54.625664][ T3633] mnt_want_write_file+0x5a/0x1f0 [ 54.630680][ T3633] reiserfs_ioctl+0x16e/0x340 [ 54.635346][ T3633] ? __se_sys_ioctl+0xf0/0x170 [ 54.640100][ T3633] ? reiserfs_unpack+0x390/0x390 [ 54.645032][ T3633] __se_sys_ioctl+0xfb/0x170 [ 54.649621][ T3633] do_syscall_64+0x3d/0xb0 [ 54.654037][ T3633] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 54.659921][ T3633] RIP: 0033:0x7f9c2c672829 [ 54.664325][ T3633] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 c0 ff ff ff f7 d8 64 89 01 48 ioctl(3, FS_IOC_SETVERSION, 0) = -1 EFAULT (Bad address) exit_group(0) = ? +++ exited with 0 +++ [ 54.683916][ T3633] RSP: 002b:00007ffffe9d1ea8 EFLAGS: