./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1592007630 <...> Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. execve("./syz-executor1592007630", ["./syz-executor1592007630"], 0x7ffeec6b92f0 /* 10 vars */) = 0 brk(NULL) = 0x555555ccd000 brk(0x555555ccdc40) = 0x555555ccdc40 arch_prctl(ARCH_SET_FS, 0x555555ccd300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1592007630", 4096) = 28 brk(0x555555ceec40) = 0x555555ceec40 brk(0x555555cef000) = 0x555555cef000 mprotect(0x7f431a3bc000, 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) = 0x7f4311f02000 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(0x7f4311f02000, 4194304) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 syzkaller login: [ 70.933788][ T4995] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4995 'syz-executor159' ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 [ 70.990300][ T4995] loop0: detected capacity change from 0 to 8192 [ 71.002578][ T4995] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 71.015688][ T4995] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 71.025026][ T4995] REISERFS (device loop0): using ordered data mode [ 71.031541][ T4995] reiserfs: using flush barriers [ 71.037801][ T4995] 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 [ 71.054323][ T4995] REISERFS (device loop0): checking transaction log (loop0) mount("/dev/loop0", "./file0", "reiserfs", MS_DIRSYNC, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 [ 71.103538][ T4995] REISERFS (device loop0): Using r5 hash to sort names [ 71.111836][ T4995] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 71.140363][ T4995] [ 71.142728][ T4995] ====================================================== [ 71.149762][ T4995] WARNING: possible circular locking dependency detected [ 71.156789][ T4995] 6.4.0-rc7-syzkaller-00234-g547cc9be86f4 #0 Not tainted [ 71.163800][ T4995] ------------------------------------------------------ [ 71.170808][ T4995] syz-executor159/4995 is trying to acquire lock: [ 71.177212][ T4995] ffff888074ee82e0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 [ 71.187073][ T4995] [ 71.187073][ T4995] but task is already holding lock: [ 71.194424][ T4995] ffff888147ae7090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 71.203991][ T4995] [ 71.203991][ T4995] which lock already depends on the new lock. [ 71.203991][ T4995] [ 71.214385][ T4995] [ 71.214385][ T4995] the existing dependency chain (in reverse order) is: [ 71.223389][ T4995] [ 71.223389][ T4995] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 71.230608][ T4995] lock_acquire+0x1e3/0x520 [ 71.235649][ T4995] __mutex_lock_common+0x1d8/0x2530 [ 71.241379][ T4995] mutex_lock_nested+0x1b/0x20 [ 71.246664][ T4995] reiserfs_write_lock+0x7a/0xd0 [ 71.252132][ T4995] reiserfs_mkdir+0x321/0x8f0 [ 71.257336][ T4995] open_xa_dir+0x2cd/0x610 [ 71.262281][ T4995] xattr_lookup+0x24/0x280 [ 71.267220][ T4995] reiserfs_xattr_set_handle+0xfc/0xdc0 [ 71.273295][ T4995] reiserfs_security_write+0x157/0x1d0 [ 71.279293][ T4995] reiserfs_new_inode+0x1631/0x1d40 [ 71.285023][ T4995] reiserfs_create+0x3e7/0x6e0 [ 71.290311][ T4995] path_openat+0x13df/0x3170 [ 71.295423][ T4995] do_filp_open+0x234/0x490 [ 71.300450][ T4995] do_sys_openat2+0x13f/0x500 [ 71.305661][ T4995] __x64_sys_openat+0x247/0x290 [ 71.311041][ T4995] do_syscall_64+0x41/0xc0 [ 71.315984][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.322407][ T4995] [ 71.322407][ T4995] -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}: [ 71.331116][ T4995] validate_chain+0x166b/0x58f0 [ 71.336497][ T4995] __lock_acquire+0x1316/0x2070 [ 71.341876][ T4995] lock_acquire+0x1e3/0x520 [ 71.346909][ T4995] down_write_nested+0x3d/0x50 [ 71.352198][ T4995] open_xa_dir+0x136/0x610 [ 71.357156][ T4995] xattr_lookup+0x24/0x280 [ 71.362445][ T4995] reiserfs_xattr_get+0xfd/0x570 [ 71.367927][ T4995] __vfs_getxattr+0x436/0x470 [ 71.373132][ T4995] smk_fetch+0xb1/0x140 [ 71.377831][ T4995] smack_d_instantiate+0x6d9/0xb40 [ 71.383472][ T4995] security_d_instantiate+0x9b/0xf0 [ 71.389198][ T4995] d_instantiate_new+0x65/0x120 [ 71.394574][ T4995] reiserfs_create+0x5cf/0x6e0 [ 71.399864][ T4995] path_openat+0x13df/0x3170 [ 71.405352][ T4995] do_filp_open+0x234/0x490 [ 71.410378][ T4995] do_sys_openat2+0x13f/0x500 [ 71.415587][ T4995] __x64_sys_openat+0x247/0x290 [ 71.420967][ T4995] do_syscall_64+0x41/0xc0 [ 71.425904][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.432322][ T4995] [ 71.432322][ T4995] other info that might help us debug this: [ 71.432322][ T4995] [ 71.442547][ T4995] Possible unsafe locking scenario: [ 71.442547][ T4995] [ 71.449991][ T4995] CPU0 CPU1 [ 71.455356][ T4995] ---- ---- [ 71.460715][ T4995] lock(&sbi->lock); [ 71.464819][ T4995] lock(&type->i_mutex_dir_key#6/3); [ 71.472741][ T4995] lock(&sbi->lock); [ 71.479258][ T4995] lock(&type->i_mutex_dir_key#6/3); [ 71.484651][ T4995] [ 71.484651][ T4995] *** DEADLOCK *** [ 71.484651][ T4995] [ 71.492790][ T4995] 3 locks held by syz-executor159/4995: [ 71.498345][ T4995] #0: ffff88807cfde460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 71.507515][ T4995] #1: ffff888074dc02e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x7ba/0x3170 [ 71.517719][ T4995] #2: ffff888147ae7090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 71.527755][ T4995] [ 71.527755][ T4995] stack backtrace: [ 71.533642][ T4995] CPU: 0 PID: 4995 Comm: syz-executor159 Not tainted 6.4.0-rc7-syzkaller-00234-g547cc9be86f4 #0 [ 71.544093][ T4995] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 71.554150][ T4995] Call Trace: [ 71.557432][ T4995] [ 71.560366][ T4995] dump_stack_lvl+0x1e7/0x2d0 [ 71.565059][ T4995] ? nf_tcp_handle_invalid+0x650/0x650 [ 71.570541][ T4995] ? print_circular_bug+0x12b/0x1a0 [ 71.575754][ T4995] check_noncircular+0x2fe/0x3b0 [ 71.580702][ T4995] ? read_lock_is_recursive+0x20/0x20 [ 71.586172][ T4995] ? add_chain_block+0x850/0x850 [ 71.591123][ T4995] ? lockdep_lock+0x123/0x2b0 [ 71.595810][ T4995] ? check_path+0x40/0x40 [ 71.600153][ T4995] ? noop_count+0x30/0x30 [ 71.604488][ T4995] ? _find_first_zero_bit+0xd4/0x100 [ 71.609777][ T4995] validate_chain+0x166b/0x58f0 [ 71.614643][ T4995] ? stack_trace_save+0x1c0/0x1c0 [ 71.619690][ T4995] ? reacquire_held_locks+0x660/0x660 [ 71.625081][ T4995] ? look_up_lock_class+0x77/0x140 [ 71.630202][ T4995] ? register_lock_class+0x104/0x990 [ 71.635502][ T4995] ? __lock_acquire+0x1316/0x2070 [ 71.640533][ T4995] ? is_dynamic_key+0x1f0/0x1f0 [ 71.645391][ T4995] ? mark_lock+0x9a/0x340 [ 71.649730][ T4995] __lock_acquire+0x1316/0x2070 [ 71.654602][ T4995] lock_acquire+0x1e3/0x520 [ 71.659114][ T4995] ? open_xa_dir+0x136/0x610 [ 71.663722][ T4995] ? read_lock_is_recursive+0x20/0x20 [ 71.669115][ T4995] ? lockdep_hardirqs_on+0x98/0x140 [ 71.674319][ T4995] ? __might_sleep+0xc0/0xc0 [ 71.678921][ T4995] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 71.684821][ T4995] ? _raw_spin_unlock+0x40/0x40 [ 71.689698][ T4995] ? stack_trace_snprint+0xf0/0xf0 [ 71.694843][ T4995] down_write_nested+0x3d/0x50 [ 71.699633][ T4995] ? open_xa_dir+0x136/0x610 [ 71.704240][ T4995] open_xa_dir+0x136/0x610 [ 71.708684][ T4995] ? kasan_set_track+0x61/0x70 [ 71.713472][ T4995] ? kasan_set_track+0x4f/0x70 [ 71.718249][ T4995] ? security_d_instantiate+0x9b/0xf0 [ 71.723667][ T4995] ? listxattr_filler+0x500/0x500 [ 71.728705][ T4995] ? do_sys_openat2+0x13f/0x500 [ 71.733574][ T4995] ? __static_call_text_end+0x52188/0x52188 [ 71.739496][ T4995] xattr_lookup+0x24/0x280 [ 71.743925][ T4995] reiserfs_xattr_get+0xfd/0x570 [ 71.748876][ T4995] ? security_get+0x6d/0xc0 [ 71.753479][ T4995] ? security_list+0x80/0x80 [ 71.758092][ T4995] __vfs_getxattr+0x436/0x470 [ 71.762821][ T4995] smk_fetch+0xb1/0x140 [ 71.767004][ T4995] smack_d_instantiate+0x6d9/0xb40 [ 71.772583][ T4995] ? smack_sem_semop+0x230/0x230 [ 71.777544][ T4995] security_d_instantiate+0x9b/0xf0 [ 71.782779][ T4995] d_instantiate_new+0x65/0x120 [ 71.787646][ T4995] reiserfs_create+0x5cf/0x6e0 [ 71.792417][ T4995] ? reiserfs_lookup+0x580/0x580 [ 71.797367][ T4995] ? bpf_lsm_inode_create+0x9/0x10 [ 71.802479][ T4995] ? security_inode_create+0xb8/0x100 [ 71.807856][ T4995] ? reiserfs_lookup+0x580/0x580 [ 71.812891][ T4995] path_openat+0x13df/0x3170 [ 71.817506][ T4995] ? do_filp_open+0x490/0x490 [ 71.822198][ T4995] do_filp_open+0x234/0x490 [ 71.826711][ T4995] ? vfs_tmpfile+0x4a0/0x4a0 [ 71.831314][ T4995] ? _raw_spin_unlock+0x28/0x40 [ 71.836177][ T4995] ? alloc_fd+0x59c/0x640 [ 71.840687][ T4995] do_sys_openat2+0x13f/0x500 [ 71.845460][ T4995] ? print_irqtrace_events+0x220/0x220 [ 71.850926][ T4995] ? do_sys_open+0x230/0x230 [ 71.855526][ T4995] ? lockdep_hardirqs_on+0x98/0x140 [ 71.860735][ T4995] ? _raw_spin_unlock_irq+0x2e/0x50 [ 71.866035][ T4995] ? ptrace_notify+0x278/0x380 [ 71.870811][ T4995] __x64_sys_openat+0x247/0x290 [ 71.875762][ T4995] ? __ia32_sys_open+0x270/0x270 [ 71.880713][ T4995] ? syscall_enter_from_user_mode+0x32/0x230 [ 71.886700][ T4995] ? syscall_enter_from_user_mode+0x8c/0x230 [ 71.892720][ T4995] do_syscall_64+0x41/0xc0 [ 71.897149][ T4995] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.903051][ T4995] RIP: 0033:0x7f431a34e799 [ 71.907469][ T4995] 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 [ 71.927101][ T4995] RSP: 002b:00007ffc8e08b698 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 71.935524][ T4995] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f431a34e799 [ 71.943498][ T4995] RDX: 000000000000275a RSI: 0000000020006ac0 RDI: 00000000ffffff9c openat(AT_FDCWD, "cpuacct.stat", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 exit_group(0) = ? +++ exited with 0 +++ [ 71.951474][ T4995] RBP: 00007f431a30e030 R08: 0000000000001102 R0