./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2323024601 <...> Warning: Permanently added '10.128.1.13' (ED25519) to the list of known hosts. execve("./syz-executor2323024601", ["./syz-executor2323024601"], 0x7ffc91b30de0 /* 10 vars */) = 0 brk(NULL) = 0x55558fa9a000 brk(0x55558fa9ad00) = 0x55558fa9ad00 arch_prctl(ARCH_SET_FS, 0x55558fa9a380) = 0 set_tid_address(0x55558fa9a650) = 5839 set_robust_list(0x55558fa9a660, 24) = 0 rseq(0x55558fa9aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2323024601", 4096) = 28 getrandom("\xc3\x8a\x88\x05\x15\xa1\x4b\x5b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558fa9ad00 brk(0x55558fabbd00) = 0x55558fabbd00 brk(0x55558fabc000) = 0x55558fabc000 mprotect(0x7fc9b875c000, 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 executing program write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc9b0200000 write(3, "\xeb\x52\x90\x4e\x54\x46\x53\x20\x20\x20\x20\x00\x02\x08\x00\x00\x00\x00\x00\x00\x00\xf8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x80\x00\xff\x0f\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\xff\x00\x00\x00\x00\x00\x00\x00\xf6\x00\x00\x00\x01\x00\x00\x00\x51\x49\x92\x54\x8e\xa5\x9a\x39\x00\x00\x00\x00\x0e\x1f\xbe\x71\x7c\xac\x22\xc0\x74\x0b\x56\xb4\x0e\xbb\x07\x00"..., 2097152) = 2097152 munmap(0x7fc9b0200000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file0", 0777) = 0 mount("/dev/loop0", "./file0", "ntfs3", 0, "") = 0 [ 79.362210][ T5839] loop0: detected capacity change from 0 to 4096 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) mknod("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", 000) = 0 openat(AT_FDCWD, "./file0", O_RDWR|O_CREAT|O_TRUNC|O_NONBLOCK|O_SYNC|FASYNC, 000) = 4 [ 79.487289][ T5839] [ 79.489764][ T5839] ============================================ [ 79.495922][ T5839] WARNING: possible recursive locking detected [ 79.502084][ T5839] 6.12.0-syzkaller-01892-g8f7c8b88bda4 #0 Not tainted [ 79.508889][ T5839] -------------------------------------------- [ 79.515040][ T5839] syz-executor232/5839 is trying to acquire lock: [ 79.521470][ T5839] ffff888077029e60 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: mi_read+0x2e1/0x5a0 [ 79.530241][ T5839] [ 79.530241][ T5839] but task is already holding lock: [ 79.537898][ T5839] ffff88807702ef28 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_link+0xf4/0x270 [ 79.546632][ T5839] [ 79.546632][ T5839] other info that might help us debug this: [ 79.555052][ T5839] Possible unsafe locking scenario: [ 79.555052][ T5839] [ 79.562553][ T5839] CPU0 [ 79.565847][ T5839] ---- [ 79.569216][ T5839] lock(&ni->ni_lock#3/5); [ 79.573830][ T5839] lock(&ni->ni_lock#3/5); [ 79.578372][ T5839] [ 79.578372][ T5839] *** DEADLOCK *** [ 79.578372][ T5839] [ 79.586613][ T5839] May be due to missing lock nesting notation [ 79.586613][ T5839] [ 79.595030][ T5839] 6 locks held by syz-executor232/5839: [ 79.600587][ T5839] #0: ffff88807d4ca420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 79.609889][ T5839] #1: ffff88807702ea68 (&type->i_mutex_dir_key#6/1){+.+.}-{4:4}, at: filename_create+0x260/0x540 [ 79.620563][ T5839] #2: ffff88807702f1c0 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: vfs_link+0x3b2/0x6e0 [ 79.630721][ T5839] #3: ffff88807702e7d0 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_link+0xd9/0x270 [ 79.639746][ T5839] #4: ffff88807702ef28 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_link+0xf4/0x270 [ 79.648939][ T5839] #5: ffff88807d4c8128 (&wnd->rw_lock/1){+.+.}-{4:4}, at: ntfs_look_free_mft+0x1e5/0x10c0 [ 79.658997][ T5839] [ 79.658997][ T5839] stack backtrace: [ 79.664939][ T5839] CPU: 0 UID: 0 PID: 5839 Comm: syz-executor232 Not tainted 6.12.0-syzkaller-01892-g8f7c8b88bda4 #0 [ 79.675728][ T5839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 [ 79.685811][ T5839] Call Trace: [ 79.689103][ T5839] [ 79.692142][ T5839] dump_stack_lvl+0x241/0x360 [ 79.696848][ T5839] ? __pfx_dump_stack_lvl+0x10/0x10 [ 79.702068][ T5839] ? __pfx__printk+0x10/0x10 [ 79.706673][ T5839] ? lockdep_unlock+0x16a/0x300 [ 79.711559][ T5839] print_deadlock_bug+0x483/0x620 [ 79.716619][ T5839] validate_chain+0x15e2/0x5920 [ 79.721496][ T5839] ? __pfx_validate_chain+0x10/0x10 [ 79.726805][ T5839] ? __pfx_validate_chain+0x10/0x10 [ 79.732112][ T5839] ? look_up_lock_class+0x77/0x170 [ 79.737238][ T5839] ? register_lock_class+0x102/0x980 [ 79.742554][ T5839] ? __pfx_register_lock_class+0x10/0x10 [ 79.748210][ T5839] ? mark_lock+0x9a/0x360 [ 79.752558][ T5839] __lock_acquire+0x1397/0x2100 [ 79.757432][ T5839] lock_acquire+0x1ed/0x550 [ 79.762077][ T5839] ? mi_read+0x2e1/0x5a0 [ 79.766342][ T5839] ? __pfx_lock_acquire+0x10/0x10 [ 79.771401][ T5839] ? __pfx___might_resched+0x10/0x10 [ 79.776714][ T5839] ? ntfs_read_run_nb+0x35c/0xf70 [ 79.781766][ T5839] ? ntfs_look_free_mft+0x878/0x10c0 [ 79.787079][ T5839] __mutex_lock+0x1ac/0xee0 [ 79.791613][ T5839] ? mi_read+0x2e1/0x5a0 [ 79.795873][ T5839] ? mi_read+0x2e1/0x5a0 [ 79.800136][ T5839] ? __pfx___mutex_lock+0x10/0x10 [ 79.805180][ T5839] ? __up_read+0x2c2/0x6b0 [ 79.809621][ T5839] ? __pfx___up_read+0x10/0x10 [ 79.814503][ T5839] mi_read+0x2e1/0x5a0 [ 79.818596][ T5839] mi_format_new+0x1ab/0x5d0 [ 79.823207][ T5839] ni_add_subrecord+0xe2/0x430 [ 79.827992][ T5839] ntfs_look_free_mft+0x878/0x10c0 [ 79.833133][ T5839] ? __pfx_ntfs_look_free_mft+0x10/0x10 [ 79.838714][ T5839] ? ni_create_attr_list+0x1f4/0x1480 [ 79.844106][ T5839] ? ni_create_attr_list+0x1f4/0x1480 [ 79.849499][ T5839] ? ni_create_attr_list+0x1f4/0x1480 [ 79.854888][ T5839] ? mi_enum_attr+0x1ea/0xa10 [ 79.859620][ T5839] ni_create_attr_list+0x9bd/0x1480 [ 79.864949][ T5839] ? __pfx_ni_create_attr_list+0x10/0x10 [ 79.870601][ T5839] ? _raw_spin_unlock_irqrestore+0x8f/0x140 [ 79.876654][ T5839] ? lockdep_hardirqs_on+0x99/0x150 [ 79.881878][ T5839] ? stack_trace_save+0x118/0x1d0 [ 79.887055][ T5839] ? __lock_acquire+0x1397/0x2100 [ 79.892103][ T5839] ni_ins_attr_ext+0x369/0xbe0 [ 79.896909][ T5839] ? ni_find_attr+0x390/0x8d0 [ 79.901797][ T5839] ? __pfx_ni_ins_attr_ext+0x10/0x10 [ 79.907646][ T5839] ? __pfx_ni_find_attr+0x10/0x10 [ 79.912703][ T5839] ni_add_name+0x809/0xe90 [ 79.917143][ T5839] ? __pfx_ni_add_name+0x10/0x10 [ 79.922130][ T5839] ? __pfx_ntfs_set_state+0x10/0x10 [ 79.927350][ T5839] ? ntfs_link_inode+0x8c/0x170 [ 79.932225][ T5839] ? fill_name_de+0x135/0x340 [ 79.936927][ T5839] ntfs_link_inode+0x130/0x170 [ 79.941721][ T5839] ntfs_link+0x116/0x270 [ 79.946003][ T5839] ? bpf_lsm_inode_link+0x9/0x10 [ 79.951333][ T5839] ? security_inode_link+0xdb/0x350 [ 79.956575][ T5839] vfs_link+0x4f0/0x6e0 [ 79.960758][ T5839] do_linkat+0x555/0x6f0 [ 79.965549][ T5839] ? __pfx_do_linkat+0x10/0x10 [ 79.970354][ T5839] ? strncpy_from_user+0x13a/0x260 [ 79.975485][ T5839] ? getname_flags+0x1e3/0x540 [ 79.980281][ T5839] __x64_sys_link+0x82/0x90 [ 79.984857][ T5839] do_syscall_64+0xf3/0x230 [ 79.989384][ T5839] ? clear_bhb_loop+0x35/0x90 [ 79.994109][ T5839] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 80.000064][ T5839] RIP: 0033:0x7fc9b86c9779 [ 80.004516][ T5839] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 80.024335][ T5839] RSP: 002b:00007ffd2d3a0638 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 link("./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", "./file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") = -1 ENOMEM (Cannot allocate memory) exit_group(0) = ? +++ exited with 0 +++ [ 80.032798][ T5839] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fc