./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2021977834 <...> 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 [ 42.717803][ T4661] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.749086][ T4661] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.38' (ECDSA) to the list of known hosts. execve("./syz-executor2021977834", ["./syz-executor2021977834"], 0x7fff34044900 /* 10 vars */) = 0 brk(NULL) = 0x55555704f000 brk(0x55555704fc40) = 0x55555704fc40 arch_prctl(ARCH_SET_FS, 0x55555704f300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2021977834", 4096) = 28 brk(0x555557070c40) = 0x555557070c40 brk(0x555557071000) = 0x555557071000 mprotect(0x7f3b06623000, 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) = 0x7f3afe169000 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(0x7f3afe169000, 4194304) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 syzkaller login: [ 71.163873][ T4999] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4999 'syz-executor202' ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 [ 71.217356][ T4999] loop0: detected capacity change from 0 to 8192 [ 71.230415][ T4999] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 71.243751][ T4999] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 71.253520][ T4999] REISERFS (device loop0): using ordered data mode [ 71.260283][ T4999] reiserfs: using flush barriers [ 71.266337][ T4999] 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 [ 71.283162][ T4999] REISERFS (device loop0): checking transaction log (loop0) mount("/dev/loop0", "./file0", "reiserfs", MS_NOSUID, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 [ 71.334592][ T4999] REISERFS (device loop0): Using r5 hash to sort names [ 71.342683][ T4999] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 71.363150][ T4999] [ 71.365622][ T4999] ====================================================== [ 71.372668][ T4999] WARNING: possible circular locking dependency detected [ 71.379689][ T4999] 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 Not tainted [ 71.386708][ T4999] ------------------------------------------------------ [ 71.393723][ T4999] syz-executor202/4999 is trying to acquire lock: [ 71.400235][ T4999] ffff888076240980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610 [ 71.410136][ T4999] [ 71.410136][ T4999] but task is already holding lock: [ 71.417506][ T4999] ffff888014eee090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 71.427109][ T4999] [ 71.427109][ T4999] which lock already depends on the new lock. [ 71.427109][ T4999] [ 71.437532][ T4999] [ 71.437532][ T4999] the existing dependency chain (in reverse order) is: [ 71.446560][ T4999] [ 71.446560][ T4999] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 71.453877][ T4999] lock_acquire+0x1e3/0x520 [ 71.458932][ T4999] __mutex_lock_common+0x1d8/0x2530 [ 71.464684][ T4999] mutex_lock_nested+0x1b/0x20 [ 71.469988][ T4999] reiserfs_write_lock+0x7a/0xd0 [ 71.475477][ T4999] reiserfs_mkdir+0x321/0x8f0 [ 71.480689][ T4999] open_xa_dir+0x2cd/0x610 [ 71.485637][ T4999] xattr_lookup+0x24/0x280 [ 71.490584][ T4999] reiserfs_xattr_set_handle+0xfc/0xdc0 [ 71.496664][ T4999] reiserfs_security_write+0x157/0x1d0 [ 71.502658][ T4999] reiserfs_new_inode+0x1631/0x1d40 [ 71.508391][ T4999] reiserfs_create+0x3e7/0x6e0 [ 71.513695][ T4999] path_openat+0x13df/0x3170 [ 71.518822][ T4999] do_filp_open+0x234/0x490 [ 71.523857][ T4999] do_sys_openat2+0x13f/0x500 [ 71.529072][ T4999] __x64_sys_openat+0x247/0x290 [ 71.534476][ T4999] do_syscall_64+0x41/0xc0 [ 71.539465][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.545903][ T4999] [ 71.545903][ T4999] -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}: [ 71.554532][ T4999] validate_chain+0x166b/0x58f0 [ 71.559925][ T4999] __lock_acquire+0x1316/0x2070 [ 71.565333][ T4999] lock_acquire+0x1e3/0x520 [ 71.570379][ T4999] down_write_nested+0x3d/0x50 [ 71.575678][ T4999] open_xa_dir+0x136/0x610 [ 71.580627][ T4999] xattr_lookup+0x24/0x280 [ 71.585584][ T4999] reiserfs_xattr_get+0xfd/0x570 [ 71.591055][ T4999] __vfs_getxattr+0x436/0x470 [ 71.596359][ T4999] smk_fetch+0xb1/0x140 [ 71.601167][ T4999] smack_d_instantiate+0x6d9/0xb40 [ 71.606823][ T4999] security_d_instantiate+0x9b/0xf0 [ 71.612562][ T4999] d_instantiate_new+0x65/0x120 [ 71.617955][ T4999] reiserfs_create+0x5cf/0x6e0 [ 71.623274][ T4999] path_openat+0x13df/0x3170 [ 71.628411][ T4999] do_filp_open+0x234/0x490 [ 71.633447][ T4999] do_sys_openat2+0x13f/0x500 [ 71.638658][ T4999] __x64_sys_openat+0x247/0x290 [ 71.644039][ T4999] do_syscall_64+0x41/0xc0 [ 71.648985][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 71.655411][ T4999] [ 71.655411][ T4999] other info that might help us debug this: [ 71.655411][ T4999] [ 71.665671][ T4999] Possible unsafe locking scenario: [ 71.665671][ T4999] [ 71.673129][ T4999] CPU0 CPU1 [ 71.678494][ T4999] ---- ---- [ 71.683862][ T4999] lock(&sbi->lock); [ 71.687856][ T4999] lock(&type->i_mutex_dir_key#6/3); [ 71.695772][ T4999] lock(&sbi->lock); [ 71.702279][ T4999] lock(&type->i_mutex_dir_key#6/3); [ 71.707671][ T4999] [ 71.707671][ T4999] *** DEADLOCK *** [ 71.707671][ T4999] [ 71.715813][ T4999] 3 locks held by syz-executor202/4999: [ 71.721364][ T4999] #0: ffff88807c7e6460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 71.730549][ T4999] #1: ffff8880762402e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x7ba/0x3170 [ 71.740770][ T4999] #2: ffff888014eee090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0 [ 71.751416][ T4999] [ 71.751416][ T4999] stack backtrace: [ 71.757405][ T4999] CPU: 0 PID: 4999 Comm: syz-executor202 Not tainted 6.4.0-rc6-syzkaller-00037-gb6dad5178cea #0 [ 71.767838][ T4999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 71.777914][ T4999] Call Trace: [ 71.781216][ T4999] [ 71.784181][ T4999] dump_stack_lvl+0x1e7/0x2d0 [ 71.788903][ T4999] ? nf_tcp_handle_invalid+0x650/0x650 [ 71.794395][ T4999] ? print_circular_bug+0x12b/0x1a0 [ 71.799616][ T4999] check_noncircular+0x2fe/0x3b0 [ 71.804658][ T4999] ? read_lock_is_recursive+0x20/0x20 [ 71.810046][ T4999] ? add_chain_block+0x850/0x850 [ 71.815005][ T4999] ? lockdep_lock+0x123/0x2b0 [ 71.819702][ T4999] ? check_path+0x40/0x40 [ 71.824051][ T4999] ? noop_count+0x30/0x30 [ 71.828394][ T4999] ? _find_first_zero_bit+0xd4/0x100 [ 71.833689][ T4999] validate_chain+0x166b/0x58f0 [ 71.838555][ T4999] ? stack_trace_save+0x1c0/0x1c0 [ 71.843603][ T4999] ? reacquire_held_locks+0x660/0x660 [ 71.849000][ T4999] ? look_up_lock_class+0x77/0x140 [ 71.854125][ T4999] ? register_lock_class+0x104/0x990 [ 71.859428][ T4999] ? __lock_acquire+0x1316/0x2070 [ 71.864467][ T4999] ? is_dynamic_key+0x1f0/0x1f0 [ 71.869333][ T4999] ? mark_lock+0x9a/0x340 [ 71.873678][ T4999] __lock_acquire+0x1316/0x2070 [ 71.878553][ T4999] lock_acquire+0x1e3/0x520 [ 71.883069][ T4999] ? open_xa_dir+0x136/0x610 [ 71.887678][ T4999] ? read_lock_is_recursive+0x20/0x20 [ 71.893067][ T4999] ? lockdep_hardirqs_on+0x98/0x140 [ 71.898284][ T4999] ? __might_sleep+0xc0/0xc0 [ 71.902891][ T4999] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 71.908800][ T4999] ? _raw_spin_unlock+0x40/0x40 [ 71.913666][ T4999] ? stack_trace_snprint+0xf0/0xf0 [ 71.918801][ T4999] down_write_nested+0x3d/0x50 [ 71.923579][ T4999] ? open_xa_dir+0x136/0x610 [ 71.928181][ T4999] open_xa_dir+0x136/0x610 [ 71.932608][ T4999] ? kasan_set_track+0x61/0x70 [ 71.937378][ T4999] ? kasan_set_track+0x4f/0x70 [ 71.942155][ T4999] ? security_d_instantiate+0x9b/0xf0 [ 71.947544][ T4999] ? listxattr_filler+0x500/0x500 [ 71.952578][ T4999] ? do_sys_openat2+0x13f/0x500 [ 71.957527][ T4999] ? __static_call_text_end+0x5cfa8/0x5cfa8 [ 71.963435][ T4999] xattr_lookup+0x24/0x280 [ 71.967867][ T4999] reiserfs_xattr_get+0xfd/0x570 [ 71.972819][ T4999] ? security_get+0x6d/0xc0 [ 71.977341][ T4999] ? security_list+0x80/0x80 [ 71.981949][ T4999] __vfs_getxattr+0x436/0x470 [ 71.986660][ T4999] smk_fetch+0xb1/0x140 [ 71.990837][ T4999] smack_d_instantiate+0x6d9/0xb40 [ 71.995974][ T4999] ? smack_sem_semop+0x230/0x230 [ 72.000934][ T4999] security_d_instantiate+0x9b/0xf0 [ 72.006158][ T4999] d_instantiate_new+0x65/0x120 [ 72.011020][ T4999] reiserfs_create+0x5cf/0x6e0 [ 72.015798][ T4999] ? reiserfs_lookup+0x580/0x580 [ 72.020751][ T4999] ? bpf_lsm_inode_create+0x9/0x10 [ 72.025871][ T4999] ? security_inode_create+0xb8/0x100 [ 72.031257][ T4999] ? reiserfs_lookup+0x580/0x580 [ 72.036205][ T4999] path_openat+0x13df/0x3170 [ 72.040819][ T4999] ? do_filp_open+0x490/0x490 [ 72.045518][ T4999] do_filp_open+0x234/0x490 [ 72.050031][ T4999] ? vfs_tmpfile+0x4a0/0x4a0 [ 72.054639][ T4999] ? _raw_spin_unlock+0x28/0x40 [ 72.059509][ T4999] ? alloc_fd+0x59c/0x640 [ 72.063863][ T4999] do_sys_openat2+0x13f/0x500 [ 72.068555][ T4999] ? print_irqtrace_events+0x220/0x220 [ 72.074030][ T4999] ? do_sys_open+0x230/0x230 [ 72.078647][ T4999] ? lockdep_hardirqs_on+0x98/0x140 [ 72.083863][ T4999] ? _raw_spin_unlock_irq+0x2e/0x50 [ 72.089072][ T4999] ? ptrace_notify+0x278/0x380 [ 72.093860][ T4999] __x64_sys_openat+0x247/0x290 [ 72.098730][ T4999] ? __ia32_sys_open+0x270/0x270 [ 72.103683][ T4999] ? syscall_enter_from_user_mode+0x32/0x230 [ 72.109680][ T4999] ? syscall_enter_from_user_mode+0x8c/0x230 [ 72.115674][ T4999] do_syscall_64+0x41/0xc0 [ 72.120105][ T4999] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 72.126016][ T4999] RIP: 0033:0x7f3b065b57e9 [ 72.130443][ T4999] 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 [ 72.150061][ T4999] RSP: 002b:00007ffd7dda0328 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 72.158493][ T4999] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3b065b57e9 [ 72.166470][ T4999] RDX: 000000000000275a RSI: 00000000200001c0 RDI: 00000000ffffff9c [ 72.174449][ T4999] RBP: 00007f3b06575080 R08: 00000000000010e6 R09: 0000000000000000 openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 exit_group(0) = ? +++ exited with 0 +++ [ 72.182436][ T4999] R10: 0000000000000000 R11: 0000000000000246 R12