./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2804152109 <...> DUID 00:04:e5:d7:6b:3e:19:ba:e5:eb:4b:9e:6a:98:ce:0b:a0:29 forked to background, child pid 4660 [ 29.826840][ T4661] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.842601][ T4661] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. execve("./syz-executor2804152109", ["./syz-executor2804152109"], 0x7fff18dfc7e0 /* 10 vars */) = 0 brk(NULL) = 0x5555567ba000 brk(0x5555567bac40) = 0x5555567bac40 arch_prctl(ARCH_SET_FS, 0x5555567ba300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2804152109", 4096) = 28 brk(0x5555567dbc40) = 0x5555567dbc40 brk(0x5555567dc000) = 0x5555567dc000 mprotect(0x7fd6374c3000, 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) = 0x7fd62f009000 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(0x7fd62f009000, 4194304) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 syzkaller login: [ 56.279592][ T4991] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4991 'syz-executor280' ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 [ 56.326390][ T4991] loop0: detected capacity change from 0 to 8192 [ 56.338511][ T4991] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 56.351730][ T4991] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 56.361200][ T4991] REISERFS (device loop0): using ordered data mode [ 56.367694][ T4991] reiserfs: using flush barriers [ 56.374052][ T4991] 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 [ 56.390477][ T4991] REISERFS (device loop0): checking transaction log (loop0) [ 56.399814][ T4991] REISERFS (device loop0): Using r5 hash to sort names [ 56.407568][ T4991] REISERFS warning (device loop0): jdm-13090 reiserfs_new_inode: ACLs aren't enabled in the fs, but vfs thinks they are! mount("/dev/loop0", "./file0", "reiserfs", MS_DIRSYNC|MS_POSIXACL, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 [ 56.420415][ T4991] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 56.437160][ T4991] [ 56.439516][ T4991] ====================================================== [ 56.446544][ T4991] WARNING: possible circular locking dependency detected [ 56.453570][ T4991] 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 Not tainted [ 56.460595][ T4991] ------------------------------------------------------ [ 56.467591][ T4991] syz-executor280/4991 is trying to acquire lock: [ 56.473983][ T4991] ffff8880749b0980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 [ 56.483813][ T4991] [ 56.483813][ T4991] but task is already holding lock: [ 56.491156][ T4991] ffff88802a9bf090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 56.500710][ T4991] [ 56.500710][ T4991] which lock already depends on the new lock. [ 56.500710][ T4991] [ 56.511091][ T4991] [ 56.511091][ T4991] the existing dependency chain (in reverse order) is: [ 56.520085][ T4991] [ 56.520085][ T4991] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 56.527273][ T4991] lock_acquire+0x1e3/0x520 [ 56.532285][ T4991] __mutex_lock_common+0x1d8/0x2530 [ 56.537991][ T4991] mutex_lock_nested+0x1b/0x20 [ 56.543267][ T4991] reiserfs_write_lock+0x7a/0xd0 [ 56.548719][ T4991] reiserfs_mkdir+0x321/0x8f0 [ 56.553905][ T4991] open_xa_dir+0x2cd/0x610 [ 56.558852][ T4991] xattr_lookup+0x24/0x280 [ 56.564045][ T4991] reiserfs_xattr_set_handle+0xfc/0xdc0 [ 56.570103][ T4991] reiserfs_security_write+0x157/0x1d0 [ 56.576074][ T4991] reiserfs_new_inode+0x1631/0x1d40 [ 56.581781][ T4991] reiserfs_mkdir+0x5b0/0x8f0 [ 56.586969][ T4991] vfs_mkdir+0x29d/0x450 [ 56.591721][ T4991] do_mkdirat+0x264/0x520 [ 56.596558][ T4991] __x64_sys_mkdir+0x6e/0x80 [ 56.601658][ T4991] do_syscall_64+0x41/0xc0 [ 56.606593][ T4991] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 56.612996][ T4991] [ 56.612996][ T4991] -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}: [ 56.621595][ T4991] validate_chain+0x166b/0x58f0 [ 56.626957][ T4991] __lock_acquire+0x1316/0x2070 [ 56.632316][ T4991] lock_acquire+0x1e3/0x520 [ 56.637326][ T4991] down_write_nested+0x3d/0x50 [ 56.642598][ T4991] open_xa_dir+0x136/0x610 [ 56.647525][ T4991] xattr_lookup+0x24/0x280 [ 56.652452][ T4991] reiserfs_xattr_get+0xfd/0x570 [ 56.657898][ T4991] __vfs_getxattr+0x436/0x470 [ 56.663086][ T4991] smk_fetch+0xb1/0x140 [ 56.667754][ T4991] smack_d_instantiate+0x6d9/0xb40 [ 56.673375][ T4991] security_d_instantiate+0x9b/0xf0 [ 56.679083][ T4991] d_instantiate_new+0x65/0x120 [ 56.684438][ T4991] reiserfs_mkdir+0x769/0x8f0 [ 56.689621][ T4991] vfs_mkdir+0x29d/0x450 [ 56.694373][ T4991] do_mkdirat+0x264/0x520 [ 56.699214][ T4991] __x64_sys_mkdir+0x6e/0x80 [ 56.704313][ T4991] do_syscall_64+0x41/0xc0 [ 56.709235][ T4991] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 56.715645][ T4991] [ 56.715645][ T4991] other info that might help us debug this: [ 56.715645][ T4991] [ 56.726470][ T4991] Possible unsafe locking scenario: [ 56.726470][ T4991] [ 56.733929][ T4991] CPU0 CPU1 [ 56.739277][ T4991] ---- ---- [ 56.744627][ T4991] lock(&sbi->lock); [ 56.748601][ T4991] lock(&type->i_mutex_dir_key#6/3); [ 56.756492][ T4991] lock(&sbi->lock); [ 56.762985][ T4991] lock(&type->i_mutex_dir_key#6/3); [ 56.768357][ T4991] [ 56.768357][ T4991] *** DEADLOCK *** [ 56.768357][ T4991] [ 56.776489][ T4991] 3 locks held by syz-executor280/4991: [ 56.782021][ T4991] #0: ffff88807c498460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 56.791153][ T4991] #1: ffff8880749b02e0 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 [ 56.801765][ T4991] #2: ffff88802a9bf090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 56.811762][ T4991] [ 56.811762][ T4991] stack backtrace: [ 56.817636][ T4991] CPU: 0 PID: 4991 Comm: syz-executor280 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 [ 56.828030][ T4991] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 56.838074][ T4991] Call Trace: [ 56.841345][ T4991] [ 56.844264][ T4991] dump_stack_lvl+0x1e7/0x2d0 [ 56.848933][ T4991] ? nf_tcp_handle_invalid+0x650/0x650 [ 56.854381][ T4991] ? print_circular_bug+0x12b/0x1a0 [ 56.859573][ T4991] check_noncircular+0x2fe/0x3b0 [ 56.864507][ T4991] ? read_lock_is_recursive+0x20/0x20 [ 56.869877][ T4991] ? add_chain_block+0x850/0x850 [ 56.874819][ T4991] ? lockdep_lock+0x123/0x2b0 [ 56.879486][ T4991] ? check_path+0x40/0x40 [ 56.883811][ T4991] ? noop_count+0x30/0x30 [ 56.888136][ T4991] ? _find_first_zero_bit+0xd4/0x100 [ 56.893410][ T4991] validate_chain+0x166b/0x58f0 [ 56.898250][ T4991] ? stack_trace_save+0x1c0/0x1c0 [ 56.903272][ T4991] ? reacquire_held_locks+0x660/0x660 [ 56.908637][ T4991] ? look_up_lock_class+0x77/0x140 [ 56.913738][ T4991] ? register_lock_class+0x104/0x990 [ 56.919035][ T4991] ? __lock_acquire+0x1316/0x2070 [ 56.924081][ T4991] ? is_dynamic_key+0x1f0/0x1f0 [ 56.929112][ T4991] ? mark_lock+0x9a/0x340 [ 56.933445][ T4991] __lock_acquire+0x1316/0x2070 [ 56.938311][ T4991] lock_acquire+0x1e3/0x520 [ 56.942828][ T4991] ? open_xa_dir+0x136/0x610 [ 56.947422][ T4991] ? read_lock_is_recursive+0x20/0x20 [ 56.952794][ T4991] ? lockdep_hardirqs_on+0x98/0x140 [ 56.958028][ T4991] ? __might_sleep+0xc0/0xc0 [ 56.962638][ T4991] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 56.968531][ T4991] ? _raw_spin_unlock+0x40/0x40 [ 56.973380][ T4991] ? stack_trace_snprint+0xf0/0xf0 [ 56.978542][ T4991] down_write_nested+0x3d/0x50 [ 56.983358][ T4991] ? open_xa_dir+0x136/0x610 [ 56.987952][ T4991] open_xa_dir+0x136/0x610 [ 56.992382][ T4991] ? kasan_set_track+0x61/0x70 [ 56.997152][ T4991] ? kasan_set_track+0x4f/0x70 [ 57.001916][ T4991] ? security_d_instantiate+0x9b/0xf0 [ 57.007463][ T4991] ? listxattr_filler+0x500/0x500 [ 57.012481][ T4991] ? __x64_sys_mkdir+0x6e/0x80 [ 57.017247][ T4991] xattr_lookup+0x24/0x280 [ 57.021663][ T4991] reiserfs_xattr_get+0xfd/0x570 [ 57.026613][ T4991] ? security_get+0x6d/0xc0 [ 57.031302][ T4991] ? security_list+0x80/0x80 [ 57.036066][ T4991] __vfs_getxattr+0x436/0x470 [ 57.040749][ T4991] smk_fetch+0xb1/0x140 [ 57.044943][ T4991] smack_d_instantiate+0x6d9/0xb40 [ 57.050073][ T4991] ? smack_sem_semop+0x230/0x230 [ 57.055008][ T4991] ? __raw_spin_lock_init+0x45/0x100 [ 57.060294][ T4991] security_d_instantiate+0x9b/0xf0 [ 57.065509][ T4991] d_instantiate_new+0x65/0x120 [ 57.070375][ T4991] reiserfs_mkdir+0x769/0x8f0 [ 57.075061][ T4991] ? reiserfs_symlink+0x720/0x720 [ 57.080080][ T4991] ? from_kgid+0x1a7/0x730 [ 57.084499][ T4991] ? bpf_lsm_inode_mkdir+0x9/0x10 [ 57.089513][ T4991] ? security_inode_mkdir+0xb8/0x100 [ 57.094811][ T4991] vfs_mkdir+0x29d/0x450 [ 57.099070][ T4991] do_mkdirat+0x264/0x520 [ 57.103403][ T4991] ? vfs_mkdir+0x450/0x450 [ 57.107819][ T4991] ? getname_flags+0x1f0/0x4e0 [ 57.112587][ T4991] __x64_sys_mkdir+0x6e/0x80 [ 57.117171][ T4991] do_syscall_64+0x41/0xc0 [ 57.121596][ T4991] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 57.127495][ T4991] RIP: 0033:0x7fd637455819 [ 57.131918][ 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 [ 57.151525][ T4991] RSP: 002b:00007ffdd6b33d68 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 57.159956][ T4991] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd637455819 [ 57.167928][ T4991] RDX: 00007fd637413e93 RSI: 0000000000000000 RDI: 0000000020000040 mkdir("./file1", 000) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 57.175893][ T4991] RBP: 00007fd6374150b0 R08: