./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor126975048 <...> Warning: Permanently added '10.128.1.57' (ECDSA) to the list of known hosts. execve("./syz-executor126975048", ["./syz-executor126975048"], 0x7ffd99537420 /* 10 vars */) = 0 brk(NULL) = 0x55555588c000 brk(0x55555588cc40) = 0x55555588cc40 arch_prctl(ARCH_SET_FS, 0x55555588c300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor126975048", 4096) = 27 brk(0x5555558adc40) = 0x5555558adc40 brk(0x5555558ae000) = 0x5555558ae000 mprotect(0x7fea26a8f000, 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) = 0x7fea1e5d5000 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"..., 4194304) = 4194304 munmap(0x7fea1e5d5000, 4194304) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 71.151698][ T4996] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4996 'syz-executor126' ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 [ 71.204279][ T4996] loop0: detected capacity change from 0 to 8192 [ 71.216333][ T4996] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 71.229533][ T4996] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 71.239130][ T4996] REISERFS (device loop0): using ordered data mode [ 71.245735][ T4996] reiserfs: using flush barriers [ 71.252047][ T4996] 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 [ 71.268820][ T4996] REISERFS (device loop0): checking transaction log (loop0) mount("/dev/loop0", "./file0", "reiserfs", MS_NOEXEC|MS_I_VERSION, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 [ 71.320018][ T4996] REISERFS (device loop0): Using r5 hash to sort names [ 71.328039][ T4996] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 71.351383][ T4996] [ 71.353767][ T4996] ====================================================== [ 71.360807][ T4996] WARNING: possible circular locking dependency detected [ 71.367851][ T4996] 6.4.0-syzkaller-01554-g6f612579be9d #0 Not tainted [ 71.374545][ T4996] ------------------------------------------------------ [ 71.381570][ T4996] syz-executor126/4996 is trying to acquire lock: [ 71.388012][ T4996] ffff888078f70980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 [ 71.397892][ T4996] [ 71.397892][ T4996] but task is already holding lock: [ 71.405259][ T4996] ffff888015e92090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 71.414879][ T4996] [ 71.414879][ T4996] which lock already depends on the new lock. [ 71.414879][ T4996] [ 71.425282][ T4996] [ 71.425282][ T4996] the existing dependency chain (in reverse order) is: [ 71.434292][ T4996] [ 71.434292][ T4996] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 71.441505][ T4996] __mutex_lock_common+0x1d8/0x2530 [ 71.447245][ T4996] mutex_lock_nested+0x1b/0x20 [ 71.452536][ T4996] reiserfs_write_lock+0x7a/0xd0 [ 71.457997][ T4996] reiserfs_mkdir+0x321/0x8f0 [ 71.463200][ T4996] open_xa_dir+0x2cd/0x610 [ 71.468140][ T4996] xattr_lookup+0x24/0x280 [ 71.473085][ T4996] reiserfs_xattr_set_handle+0xfc/0xdc0 [ 71.479249][ T4996] reiserfs_security_write+0x157/0x1d0 [ 71.485235][ T4996] reiserfs_new_inode+0x1631/0x1d40 [ 71.490954][ T4996] reiserfs_create+0x3e7/0x6e0 [ 71.496247][ T4996] path_openat+0x13e7/0x3180 [ 71.501368][ T4996] do_filp_open+0x234/0x490 [ 71.506399][ T4996] do_sys_openat2+0x13a/0x520 [ 71.511605][ T4996] __x64_sys_open+0x225/0x270 [ 71.516813][ T4996] do_syscall_64+0x41/0xc0 [ 71.521756][ T4996] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.528172][ T4996] [ 71.528172][ T4996] -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}: [ 71.536788][ T4996] __lock_acquire+0x39ff/0x7f70 [ 71.542191][ T4996] lock_acquire+0x1e3/0x520 [ 71.547248][ T4996] down_write_nested+0x3d/0x50 [ 71.552536][ T4996] open_xa_dir+0x136/0x610 [ 71.557478][ T4996] xattr_lookup+0x24/0x280 [ 71.562446][ T4996] reiserfs_xattr_get+0xfd/0x570 [ 71.567909][ T4996] __vfs_getxattr+0x436/0x470 [ 71.573112][ T4996] smk_fetch+0xb1/0x140 [ 71.577786][ T4996] smack_d_instantiate+0x6d9/0xb40 [ 71.583417][ T4996] security_d_instantiate+0x9b/0xf0 [ 71.589139][ T4996] d_instantiate_new+0x65/0x120 [ 71.594513][ T4996] reiserfs_create+0x5cf/0x6e0 [ 71.599801][ T4996] path_openat+0x13e7/0x3180 [ 71.604937][ T4996] do_filp_open+0x234/0x490 [ 71.609962][ T4996] do_sys_openat2+0x13a/0x520 [ 71.615163][ T4996] __x64_sys_open+0x225/0x270 [ 71.620363][ T4996] do_syscall_64+0x41/0xc0 [ 71.625303][ T4996] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.631718][ T4996] [ 71.631718][ T4996] other info that might help us debug this: [ 71.631718][ T4996] [ 71.641939][ T4996] Possible unsafe locking scenario: [ 71.641939][ T4996] [ 71.649381][ T4996] CPU0 CPU1 [ 71.654742][ T4996] ---- ---- [ 71.660100][ T4996] lock(&sbi->lock); [ 71.664080][ T4996] lock(&type->i_mutex_dir_key#6/3); [ 71.671982][ T4996] lock(&sbi->lock); [ 71.678484][ T4996] lock(&type->i_mutex_dir_key#6/3); [ 71.683871][ T4996] [ 71.683871][ T4996] *** DEADLOCK *** [ 71.683871][ T4996] [ 71.692011][ T4996] 3 locks held by syz-executor126/4996: [ 71.697552][ T4996] #0: ffff88802caaa460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 71.706704][ T4996] #1: ffff888078f702e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x7c2/0x3180 [ 71.716906][ T4996] #2: ffff888015e92090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 71.726924][ T4996] [ 71.726924][ T4996] stack backtrace: [ 71.732804][ T4996] CPU: 0 PID: 4996 Comm: syz-executor126 Not tainted 6.4.0-syzkaller-01554-g6f612579be9d #0 [ 71.742865][ T4996] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 71.752921][ T4996] Call Trace: [ 71.756200][ T4996] [ 71.759142][ T4996] dump_stack_lvl+0x1e7/0x2d0 [ 71.763827][ T4996] ? nf_tcp_handle_invalid+0x650/0x650 [ 71.769294][ T4996] ? print_circular_bug+0x12b/0x1a0 [ 71.774499][ T4996] check_noncircular+0x375/0x4a0 [ 71.779447][ T4996] ? print_deadlock_bug+0x600/0x600 [ 71.784657][ T4996] ? lockdep_lock+0x123/0x2b0 [ 71.789364][ T4996] ? mark_lock+0x9a/0x340 [ 71.793706][ T4996] ? _find_first_zero_bit+0xd4/0x100 [ 71.798996][ T4996] __lock_acquire+0x39ff/0x7f70 [ 71.803864][ T4996] ? verify_lock_unused+0x140/0x140 [ 71.809076][ T4996] ? verify_lock_unused+0x140/0x140 [ 71.814285][ T4996] ? read_lock_is_recursive+0x20/0x20 [ 71.819663][ T4996] ? rcu_lock_release+0x5/0x30 [ 71.824432][ T4996] ? __lock_acquire+0x7f70/0x7f70 [ 71.829481][ T4996] ? unwind_next_frame+0x1a0d/0x2390 [ 71.834785][ T4996] ? mark_lock+0x9a/0x340 [ 71.839143][ T4996] lock_acquire+0x1e3/0x520 [ 71.843670][ T4996] ? open_xa_dir+0x136/0x610 [ 71.848275][ T4996] ? read_lock_is_recursive+0x20/0x20 [ 71.853654][ T4996] ? lockdep_hardirqs_on+0x98/0x140 [ 71.858853][ T4996] ? __might_sleep+0xc0/0xc0 [ 71.863447][ T4996] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 71.869354][ T4996] ? _raw_spin_unlock+0x40/0x40 [ 71.874213][ T4996] ? stack_trace_snprint+0xf0/0xf0 [ 71.879335][ T4996] down_write_nested+0x3d/0x50 [ 71.884119][ T4996] ? open_xa_dir+0x136/0x610 [ 71.888734][ T4996] open_xa_dir+0x136/0x610 [ 71.893167][ T4996] ? kasan_set_track+0x61/0x70 [ 71.897938][ T4996] ? kasan_set_track+0x4f/0x70 [ 71.902709][ T4996] ? security_d_instantiate+0x9b/0xf0 [ 71.908088][ T4996] ? listxattr_filler+0x500/0x500 [ 71.913247][ T4996] ? do_sys_openat2+0x13a/0x520 [ 71.918105][ T4996] ? __static_call_text_end+0x41970/0x41970 [ 71.924007][ T4996] xattr_lookup+0x24/0x280 [ 71.928519][ T4996] reiserfs_xattr_get+0xfd/0x570 [ 71.933463][ T4996] ? security_get+0x6d/0xc0 [ 71.937971][ T4996] ? security_list+0x80/0x80 [ 71.942566][ T4996] __vfs_getxattr+0x436/0x470 [ 71.947260][ T4996] smk_fetch+0xb1/0x140 [ 71.951420][ T4996] smack_d_instantiate+0x6d9/0xb40 [ 71.956538][ T4996] ? smack_sem_semop+0x230/0x230 [ 71.961478][ T4996] security_d_instantiate+0x9b/0xf0 [ 71.966681][ T4996] d_instantiate_new+0x65/0x120 [ 71.971661][ T4996] reiserfs_create+0x5cf/0x6e0 [ 71.976433][ T4996] ? reiserfs_lookup+0x580/0x580 [ 71.981385][ T4996] ? bpf_lsm_inode_create+0x9/0x10 [ 71.986498][ T4996] ? security_inode_create+0xb8/0x100 [ 71.991868][ T4996] ? reiserfs_lookup+0x580/0x580 [ 71.996810][ T4996] path_openat+0x13e7/0x3180 [ 72.001420][ T4996] ? do_filp_open+0x490/0x490 [ 72.006109][ T4996] do_filp_open+0x234/0x490 [ 72.010620][ T4996] ? vfs_tmpfile+0x4b0/0x4b0 [ 72.015224][ T4996] ? _raw_spin_unlock+0x28/0x40 [ 72.020082][ T4996] ? alloc_fd+0x59c/0x640 [ 72.024410][ T4996] do_sys_openat2+0x13a/0x520 [ 72.029090][ T4996] ? print_irqtrace_events+0x220/0x220 [ 72.034549][ T4996] ? ptrace_stop+0x75a/0x970 [ 72.039168][ T4996] ? do_sys_open+0x230/0x230 [ 72.043764][ T4996] ? lockdep_hardirqs_on+0x98/0x140 [ 72.048962][ T4996] ? _raw_spin_unlock_irq+0x2e/0x50 [ 72.054163][ T4996] ? ptrace_notify+0x278/0x380 [ 72.058932][ T4996] __x64_sys_open+0x225/0x270 [ 72.063665][ T4996] ? do_sys_openat2+0x520/0x520 [ 72.068537][ T4996] ? syscall_enter_from_user_mode+0x32/0x230 [ 72.074536][ T4996] ? syscall_enter_from_user_mode+0x8c/0x230 [ 72.080533][ T4996] do_syscall_64+0x41/0xc0 [ 72.085056][ T4996] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 72.090948][ T4996] RIP: 0033:0x7fea26a217a9 [ 72.095361][ T4996] 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 [ 72.114967][ T4996] RSP: 002b:00007ffcac91cf08 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 open("./bus", O_RDWR|O_CREAT|O_SYNC|O_LARGEFILE|O_NOATIME, 000) = 4 exit_group(0) = ? +++ exited with 0 +++ [