./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1511582854 <...> Warning: Permanently added '10.128.1.144' (ECDSA) to the list of known hosts. execve("./syz-executor1511582854", ["./syz-executor1511582854"], 0x7ffe672af280 /* 10 vars */) = 0 brk(NULL) = 0x555555ebf000 brk(0x555555ebfc40) = 0x555555ebfc40 arch_prctl(ARCH_SET_FS, 0x555555ebf300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1511582854", 4096) = 28 brk(0x555555ee0c40) = 0x555555ee0c40 brk(0x555555ee1000) = 0x555555ee1000 mprotect(0x7f5507550000, 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) = 0x7f54ff096000 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(0x7f54ff096000, 4194304) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 54.485125][ T4991] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4991 'syz-executor151' ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 [ 54.529696][ T4991] loop0: detected capacity change from 0 to 8192 [ 54.540928][ T4991] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 54.554244][ T4991] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 54.563788][ T4991] REISERFS (device loop0): using ordered data mode [ 54.570286][ T4991] reiserfs: using flush barriers [ 54.576771][ T4991] REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 35870, max trans age 30 [ 54.593490][ T4991] REISERFS (device loop0): checking transaction log (loop0) mount("/dev/loop0", "./file0", "reiserfs", MS_NOSUID|MS_POSIXACL, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 [ 54.632685][ T4991] REISERFS (device loop0): Using r5 hash to sort names [ 54.640401][ T4991] REISERFS warning (device loop0): jdm-13090 reiserfs_new_inode: ACLs aren't enabled in the fs, but vfs thinks they are! [ 54.653333][ T4991] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 54.677075][ T4991] [ 54.679430][ T4991] ====================================================== [ 54.686452][ T4991] WARNING: possible circular locking dependency detected [ 54.693467][ T4991] 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0 Not tainted [ 54.700463][ T4991] ------------------------------------------------------ [ 54.707455][ T4991] syz-executor151/4991 is trying to acquire lock: [ 54.713844][ T4991] ffff888074940980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 [ 54.723669][ T4991] [ 54.723669][ T4991] but task is already holding lock: [ 54.731006][ T4991] ffff888012ab9090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 54.740544][ T4991] [ 54.740544][ T4991] which lock already depends on the new lock. [ 54.740544][ T4991] [ 54.750925][ T4991] [ 54.750925][ T4991] the existing dependency chain (in reverse order) is: [ 54.759918][ T4991] [ 54.759918][ T4991] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 54.767100][ T4991] lock_acquire+0x1e3/0x520 [ 54.772103][ T4991] __mutex_lock_common+0x1d8/0x2530 [ 54.777818][ T4991] mutex_lock_nested+0x1b/0x20 [ 54.783087][ T4991] reiserfs_write_lock+0x7a/0xd0 [ 54.788529][ T4991] reiserfs_mkdir+0x321/0x8f0 [ 54.793703][ T4991] open_xa_dir+0x2cd/0x610 [ 54.798618][ T4991] xattr_lookup+0x24/0x280 [ 54.803533][ T4991] reiserfs_xattr_set_handle+0xfc/0xdc0 [ 54.809576][ T4991] reiserfs_security_write+0x157/0x1d0 [ 54.815532][ T4991] reiserfs_new_inode+0x1631/0x1d40 [ 54.821231][ T4991] reiserfs_create+0x3e7/0x6e0 [ 54.826491][ T4991] path_openat+0x13df/0x3170 [ 54.831579][ T4991] do_filp_open+0x234/0x490 [ 54.836582][ T4991] do_sys_openat2+0x13f/0x500 [ 54.841760][ T4991] __x64_sys_creat+0x123/0x160 [ 54.847025][ T4991] do_syscall_64+0x41/0xc0 [ 54.851942][ T4991] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 54.858335][ T4991] [ 54.858335][ T4991] -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}: [ 54.866919][ T4991] validate_chain+0x166b/0x58f0 [ 54.872272][ T4991] __lock_acquire+0x1316/0x2070 [ 54.877626][ T4991] lock_acquire+0x1e3/0x520 [ 54.882631][ T4991] down_write_nested+0x3d/0x50 [ 54.887893][ T4991] open_xa_dir+0x136/0x610 [ 54.892811][ T4991] xattr_lookup+0x24/0x280 [ 54.897725][ T4991] reiserfs_xattr_get+0xfd/0x570 [ 54.903161][ T4991] __vfs_getxattr+0x436/0x470 [ 54.908335][ T4991] smk_fetch+0xb1/0x140 [ 54.912989][ T4991] smack_d_instantiate+0x6d9/0xb40 [ 54.918599][ T4991] security_d_instantiate+0x9b/0xf0 [ 54.924299][ T4991] d_instantiate_new+0x65/0x120 [ 54.929648][ T4991] reiserfs_create+0x5cf/0x6e0 [ 54.934908][ T4991] path_openat+0x13df/0x3170 [ 54.939998][ T4991] do_filp_open+0x234/0x490 [ 54.944996][ T4991] do_sys_openat2+0x13f/0x500 [ 54.950172][ T4991] __x64_sys_creat+0x123/0x160 [ 54.955446][ T4991] do_syscall_64+0x41/0xc0 [ 54.960379][ T4991] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 54.966783][ T4991] [ 54.966783][ T4991] other info that might help us debug this: [ 54.966783][ T4991] [ 54.977003][ T4991] Possible unsafe locking scenario: [ 54.977003][ T4991] [ 54.984433][ T4991] CPU0 CPU1 [ 54.989774][ T4991] ---- ---- [ 54.995129][ T4991] lock(&sbi->lock); [ 54.999094][ T4991] lock(&type->i_mutex_dir_key#6/3); [ 55.006973][ T4991] lock(&sbi->lock); [ 55.013450][ T4991] lock(&type->i_mutex_dir_key#6/3); [ 55.018823][ T4991] [ 55.018823][ T4991] *** DEADLOCK *** [ 55.018823][ T4991] [ 55.026957][ T4991] 3 locks held by syz-executor151/4991: [ 55.032482][ T4991] #0: ffff888079fe4460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 55.041617][ T4991] #1: ffff8880749402e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x7ba/0x3170 [ 55.051775][ T4991] #2: ffff888012ab9090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 55.061759][ T4991] [ 55.061759][ T4991] stack backtrace: [ 55.067626][ T4991] CPU: 0 PID: 4991 Comm: syz-executor151 Not tainted 6.4.0-rc5-syzkaller-00016-ga4d7d7011219 #0 [ 55.078013][ T4991] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 55.088047][ T4991] Call Trace: [ 55.091307][ T4991] [ 55.094253][ T4991] dump_stack_lvl+0x1e7/0x2d0 [ 55.098914][ T4991] ? nf_tcp_handle_invalid+0x650/0x650 [ 55.104357][ T4991] ? print_circular_bug+0x12b/0x1a0 [ 55.109539][ T4991] check_noncircular+0x2fe/0x3b0 [ 55.114467][ T4991] ? read_lock_is_recursive+0x20/0x20 [ 55.119823][ T4991] ? add_chain_block+0x850/0x850 [ 55.124787][ T4991] ? lockdep_lock+0x123/0x2b0 [ 55.129445][ T4991] ? check_path+0x40/0x40 [ 55.133756][ T4991] ? noop_count+0x30/0x30 [ 55.138066][ T4991] ? _find_first_zero_bit+0xd4/0x100 [ 55.143333][ T4991] validate_chain+0x166b/0x58f0 [ 55.148175][ T4991] ? stack_trace_save+0x1c0/0x1c0 [ 55.153189][ T4991] ? reacquire_held_locks+0x660/0x660 [ 55.158543][ T4991] ? look_up_lock_class+0x77/0x140 [ 55.163634][ T4991] ? register_lock_class+0x104/0x990 [ 55.168909][ T4991] ? __lock_acquire+0x1316/0x2070 [ 55.173917][ T4991] ? is_dynamic_key+0x1f0/0x1f0 [ 55.178751][ T4991] ? mark_lock+0x9a/0x340 [ 55.183072][ T4991] __lock_acquire+0x1316/0x2070 [ 55.187917][ T4991] lock_acquire+0x1e3/0x520 [ 55.192403][ T4991] ? open_xa_dir+0x136/0x610 [ 55.196979][ T4991] ? read_lock_is_recursive+0x20/0x20 [ 55.202340][ T4991] ? lockdep_hardirqs_on+0x98/0x140 [ 55.207519][ T4991] ? __might_sleep+0xc0/0xc0 [ 55.212092][ T4991] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 55.217973][ T4991] ? _raw_spin_unlock+0x40/0x40 [ 55.222818][ T4991] ? stack_trace_snprint+0xf0/0xf0 [ 55.227914][ T4991] down_write_nested+0x3d/0x50 [ 55.232658][ T4991] ? open_xa_dir+0x136/0x610 [ 55.237234][ T4991] open_xa_dir+0x136/0x610 [ 55.241635][ T4991] ? kasan_set_track+0x61/0x70 [ 55.246417][ T4991] ? kasan_set_track+0x4f/0x70 [ 55.251169][ T4991] ? security_d_instantiate+0x9b/0xf0 [ 55.256528][ T4991] ? listxattr_filler+0x500/0x500 [ 55.261548][ T4991] ? do_sys_openat2+0x13f/0x500 [ 55.266394][ T4991] ? __static_call_text_end+0x5ffa8/0x5ffa8 [ 55.272274][ T4991] xattr_lookup+0x24/0x280 [ 55.276678][ T4991] reiserfs_xattr_get+0xfd/0x570 [ 55.281601][ T4991] ? security_get+0x6d/0xc0 [ 55.286105][ T4991] ? security_list+0x80/0x80 [ 55.290687][ T4991] __vfs_getxattr+0x436/0x470 [ 55.295362][ T4991] smk_fetch+0xb1/0x140 [ 55.299509][ T4991] smack_d_instantiate+0x6d9/0xb40 [ 55.304615][ T4991] ? smack_sem_semop+0x230/0x230 [ 55.309543][ T4991] security_d_instantiate+0x9b/0xf0 [ 55.314725][ T4991] d_instantiate_new+0x65/0x120 [ 55.319563][ T4991] reiserfs_create+0x5cf/0x6e0 [ 55.324309][ T4991] ? reiserfs_lookup+0x580/0x580 [ 55.329230][ T4991] ? bpf_lsm_inode_create+0x9/0x10 [ 55.334318][ T4991] ? security_inode_create+0xb8/0x100 [ 55.339762][ T4991] ? reiserfs_lookup+0x580/0x580 [ 55.344682][ T4991] path_openat+0x13df/0x3170 [ 55.349260][ T4991] ? do_filp_open+0x490/0x490 [ 55.353919][ T4991] do_filp_open+0x234/0x490 [ 55.358407][ T4991] ? vfs_tmpfile+0x4a0/0x4a0 [ 55.362978][ T4991] ? _raw_spin_unlock+0x28/0x40 [ 55.367813][ T4991] ? alloc_fd+0x59c/0x640 [ 55.372129][ T4991] do_sys_openat2+0x13f/0x500 [ 55.376792][ T4991] ? do_sys_open+0x230/0x230 [ 55.381378][ T4991] ? _raw_spin_unlock_irq+0x2e/0x50 [ 55.386646][ T4991] ? ptrace_notify+0x278/0x380 [ 55.391391][ T4991] __x64_sys_creat+0x123/0x160 [ 55.396142][ T4991] ? __x64_compat_sys_openat+0x290/0x290 [ 55.401757][ T4991] ? syscall_enter_from_user_mode+0x32/0x230 [ 55.407716][ T4991] ? syscall_enter_from_user_mode+0x8c/0x230 [ 55.413689][ T4991] do_syscall_64+0x41/0xc0 [ 55.418101][ T4991] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 55.423988][ T4991] RIP: 0033:0x7f55074e2799 [ 55.428386][ T4991] 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 [ 55.447975][ T4991] RSP: 002b:00007fffcf5de098 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 55.456371][ T4991] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f55074e2799 [ 55.464325][ T4991] RDX: 00007f55074a0e13 RSI: 0000000000000000 RDI: 0000000020000000 [ 55.472369][ T4991] RBP: 00007f55074a2030 R08: 00000000000010e7 R09: 0000000000000000 creat("./bus", 000) = 4 exit_group(0) = ? +++ exited with 0 +++ [ 55.480317][ T4991] R10: 00007fffcf5ddf60 R11: 0000000000000246 R12: 00007f