./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2499929842 <...> forked to background, child pid 4640 no interfaces have a carrier [ 27.262096][ T4641] 8021q: adding VLAN 0 to HW filter on device bond0 [ 27.271597][ T4641] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.189' (ECDSA) to the list of known hosts. execve("./syz-executor2499929842", ["./syz-executor2499929842"], 0x7ffce71897e0 /* 10 vars */) = 0 brk(NULL) = 0x555556ecb000 brk(0x555556ecbc40) = 0x555556ecbc40 arch_prctl(ARCH_SET_FS, 0x555556ecb300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2499929842", 4096) = 28 brk(0x555556eecc40) = 0x555556eecc40 brk(0x555556eed000) = 0x555556eed000 mprotect(0x7efcc46f0000, 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) = 0x7efcbc236000 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"..., 524288) = 524288 munmap(0x7efcbc236000, 524288) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 mount("/dev/loop0", "./file0", "hfsplus", MS_SYNCHRONOUS|MS_RELATIME|MS_I_VERSION|MS_LAZYTIME, "force") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 openat(AT_FDCWD, "./file0", O_RDONLY) = 4 openat(4, ".", O_RDONLY) = 5 openat(AT_FDCWD, "./file0", O_RDONLY) = 6 renameat(6, "./file1", 4, "./bus") = 0 syzkaller login: [ 52.040113][ T5062] loop0: detected capacity change from 0 to 1024 [ 52.072302][ T5062] [ 52.075025][ T5062] ============================================ [ 52.081350][ T5062] WARNING: possible recursive locking detected [ 52.087481][ T5062] 6.2.0-rc1-syzkaller #0 Not tainted [ 52.092740][ T5062] -------------------------------------------- [ 52.098878][ T5062] syz-executor249/5062 is trying to acquire lock: [ 52.105265][ T5062] ffff8880227c0108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x27b/0x9b0 [ 52.116049][ T5062] [ 52.116049][ T5062] but task is already holding lock: [ 52.123388][ T5062] ffff8880227c1c08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x205/0x10d0 [ 52.134600][ T5062] [ 52.134600][ T5062] other info that might help us debug this: [ 52.142639][ T5062] Possible unsafe locking scenario: [ 52.142639][ T5062] [ 52.150084][ T5062] CPU0 [ 52.153343][ T5062] ---- [ 52.156597][ T5062] lock(&HFSPLUS_I(inode)->extents_lock); [ 52.162378][ T5062] lock(&HFSPLUS_I(inode)->extents_lock); [ 52.168165][ T5062] [ 52.168165][ T5062] *** DEADLOCK *** [ 52.168165][ T5062] [ 52.176291][ T5062] May be due to missing lock nesting notation [ 52.176291][ T5062] [ 52.184620][ T5062] 7 locks held by syz-executor249/5062: [ 52.190157][ T5062] #0: ffff88801fdbc460 (sb_writers#9){.+.+}-{0:0}, at: do_renameat2+0x37f/0xc30 [ 52.199399][ T5062] #1: ffff8880227c1740 (&type->i_mutex_dir_key#6/1){+.+.}-{3:3}, at: lock_rename+0x229/0x280 [ 52.209677][ T5062] #2: ffff8880227c1e00 (&sb->s_type->i_mutex_key#16){+.+.}-{3:3}, at: lock_two_nondirectories+0xf0/0x110 [ 52.220991][ T5062] #3: ffff8880227c24c0 (&sb->s_type->i_mutex_key#15/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xd5/0x110 [ 52.232551][ T5062] #4: ffff88802997e998 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x151/0x830 [ 52.242011][ T5062] #5: ffff8880227c1c08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x205/0x10d0 [ 52.253641][ T5062] #6: ffff88802997e8f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xdd/0x500 [ 52.263628][ T5062] [ 52.263628][ T5062] stack backtrace: [ 52.269509][ T5062] CPU: 0 PID: 5062 Comm: syz-executor249 Not tainted 6.2.0-rc1-syzkaller #0 [ 52.278180][ T5062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 52.288216][ T5062] Call Trace: [ 52.291473][ T5062] [ 52.294406][ T5062] dump_stack_lvl+0xd1/0x138 [ 52.298992][ T5062] __lock_acquire.cold+0x116/0x3a7 [ 52.304099][ T5062] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 52.310066][ T5062] ? save_trace+0x43/0xad0 [ 52.314491][ T5062] ? create_page_buffers+0x440/0x640 [ 52.319756][ T5062] lock_acquire+0x1e3/0x630 [ 52.324241][ T5062] ? hfsplus_get_block+0x27b/0x9b0 [ 52.329336][ T5062] ? lock_release+0x810/0x810 [ 52.334184][ T5062] __mutex_lock+0x12f/0x1360 [ 52.338764][ T5062] ? hfsplus_get_block+0x27b/0x9b0 [ 52.343859][ T5062] ? hfsplus_get_block+0x27b/0x9b0 [ 52.349059][ T5062] ? mutex_lock_io_nested+0x11a0/0x11a0 [ 52.354600][ T5062] ? find_held_lock+0x2d/0x110 [ 52.359356][ T5062] ? create_page_buffers+0x440/0x640 [ 52.364627][ T5062] ? lock_downgrade+0x6e0/0x6e0 [ 52.369457][ T5062] hfsplus_get_block+0x27b/0x9b0 [ 52.374382][ T5062] block_read_full_folio+0x35b/0x9d0 [ 52.379653][ T5062] ? hfsplus_file_extend+0xf60/0xf60 [ 52.384946][ T5062] ? create_page_buffers+0x640/0x640 [ 52.390212][ T5062] ? folio_flags.constprop.0+0x53/0x150 [ 52.396063][ T5062] ? folio_add_lru+0x37b/0x680 [ 52.400907][ T5062] ? hfsplus_bmap+0x30/0x30 [ 52.405396][ T5062] filemap_read_folio+0xdb/0x2c0 [ 52.410334][ T5062] ? __folio_lock_killable+0x20/0x20 [ 52.415600][ T5062] ? mutex_lock_io_nested+0x11a0/0x11a0 [ 52.421135][ T5062] ? __mutex_lock+0x231/0x1360 [ 52.425884][ T5062] do_read_cache_folio+0x1df/0x510 [ 52.430977][ T5062] ? hfsplus_bmap+0x30/0x30 [ 52.435466][ T5062] read_cache_page+0x5d/0x160 [ 52.440137][ T5062] hfsplus_block_free+0x13d/0x500 [ 52.445234][ T5062] ? hfsplus_find_init+0x95/0x230 [ 52.450261][ T5062] hfsplus_free_extents+0x1ff/0x4f0 [ 52.455446][ T5062] hfsplus_file_truncate+0xe36/0x10d0 [ 52.460799][ T5062] ? hfsplus_find_exit+0x79/0xc0 [ 52.465735][ T5062] ? hfsplus_get_block+0x9b0/0x9b0 [ 52.470830][ T5062] ? mutex_lock_io_nested+0x11a0/0x11a0 [ 52.476380][ T5062] hfsplus_delete_inode+0x191/0x220 [ 52.481583][ T5062] hfsplus_unlink+0x5a6/0x830 [ 52.486268][ T5062] ? hfsplus_symlink+0x2e0/0x2e0 [ 52.491189][ T5062] ? down_write_nested+0x15b/0x220 [ 52.496286][ T5062] ? up_read+0x20/0x20 [ 52.500338][ T5062] hfsplus_rename+0xc2/0x210 [ 52.504912][ T5062] ? hfsplus_unlink+0x830/0x830 [ 52.509742][ T5062] vfs_rename+0x1162/0x1a90 [ 52.514233][ T5062] ? path_openat+0x2a50/0x2a50 [ 52.518975][ T5062] ? d_lookup+0x105/0x170 [ 52.523284][ T5062] ? bpf_lsm_path_rename+0x9/0x10 [ 52.528287][ T5062] ? security_path_rename+0x158/0x230 [ 52.533643][ T5062] do_renameat2+0xb22/0xc30 [ 52.538131][ T5062] ? __ia32_sys_link+0xa0/0xa0 [ 52.542881][ T5062] ? __virt_addr_valid+0x61/0x2e0 [ 52.547895][ T5062] ? __phys_addr_symbol+0x30/0x70 [ 52.552903][ T5062] ? strncpy_from_user+0x28b/0x3c0 [ 52.557997][ T5062] ? _raw_spin_unlock_irq+0x23/0x50 [ 52.563177][ T5062] __x64_sys_renameat2+0xe8/0x120 [ 52.568185][ T5062] do_syscall_64+0x39/0xb0 [ 52.572584][ T5062] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 52.578453][ T5062] RIP: 0033:0x7efcc4682b79 [ 52.582847][ T5062] 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 [ 52.602438][ T5062] RSP: 002b:00007ffdc7f4fd48 EFLAGS: 00000246 ORIG_RAX: 000000000000013c [ 52.611131][ T5062] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007efcc4682b79 [ 52.619089][ T5062] RDX: 0000000000000005 RSI: 00000000200001c0 RDI: 0000000000000005 [ 52.627041][ T5062] RBP: 00007efcc4642180 R08: 0000000000000000 R09: 0000000000000000 [ 52.634991][ T5062] R10: 0000000020000200 R11: 0000000000000246 R12: 00007efcc4642210 [ 52.642943][ T5062] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 52.650899][ T5062] [ 52.654106][ T5062] hfsplus: request for non-existent node 31668 in B*Tree [ 52.661137][ T5062] hfsplus: request for non-existent node 31668 in B*Tree [ 52.668210][ T5062] hfsplus: request for non-existent node 31668 in B*Tree [ 52.675247][ T5062] hfsplus: request for non-existent node 31668 in B*Tree [ 52.682274][ T5062] hfsplus: request for non-existent node 31668 in B*Tree renameat2(5, "./file0", 5, "./bus", 0) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 52.689305][ T5062] hfsplus: request for n