./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1673281829 <...> Warning: Permanently added '10.128.0.251' (ED25519) to the list of known hosts. execve("./syz-executor1673281829", ["./syz-executor1673281829"], 0x7ffe7c64cff0 /* 10 vars */) = 0 brk(NULL) = 0x55558f6f1000 brk(0x55558f6f1d00) = 0x55558f6f1d00 arch_prctl(ARCH_SET_FS, 0x55558f6f1380) = 0 set_tid_address(0x55558f6f1650) = 5830 set_robust_list(0x55558f6f1660, 24) = 0 rseq(0x55558f6f1ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1673281829", 4096) = 28 getrandom("\xc7\x8a\x9e\xf4\x15\x64\x8c\x63", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558f6f1d00 brk(0x55558f712d00) = 0x55558f712d00 brk(0x55558f713000) = 0x55558f713000 mprotect(0x7f75be8ea000, 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 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5831 attached [pid 5831] set_robust_list(0x55558f6f1660, 24 [pid 5830] <... clone resumed>, child_tidptr=0x55558f6f1650) = 5831 [pid 5831] <... set_robust_list resumed>) = 0 [pid 5831] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5831] setpgid(0, 0) = 0 [pid 5831] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5831] write(3, "1000", 4) = 4 [pid 5831] close(3) = 0 [pid 5831] write(1, "executing program\n", 18executing program ) = 18 [pid 5831] memfd_create("syzkaller", 0) = 3 [pid 5831] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f75b6400000 [pid 5831] 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 [pid 5831] munmap(0x7f75b6400000, 138412032) = 0 [pid 5831] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5831] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5831] close(3) = 0 [pid 5831] close(4) = 0 [pid 5831] mkdir("./file0", 0777) = 0 [pid 5831] mount("/dev/loop0", "./file0", "hfsplus", MS_NODEV|MS_NOEXEC|MS_I_VERSION, "") = 0 [ 71.029856][ T5831] loop0: detected capacity change from 0 to 1024 [pid 5831] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5831] chdir("./file0") = 0 [pid 5831] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5831] openat(AT_FDCWD, "hugetlb.2MB.usage_in_bytes", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [ 71.146094][ T5831] [ 71.148668][ T5831] ============================================ [ 71.154835][ T5831] WARNING: possible recursive locking detected [ 71.160981][ T5831] 6.13.0-rc3-next-20241220-syzkaller #0 Not tainted [ 71.167560][ T5831] -------------------------------------------- [ 71.173690][ T5831] syz-executor167/5831 is trying to acquire lock: [ 71.180097][ T5831] ffff888060da20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x14a/0x1c0 [ 71.189979][ T5831] [ 71.189979][ T5831] but task is already holding lock: [ 71.197881][ T5831] ffff888060da20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x14a/0x1c0 [ 71.208388][ T5831] [ 71.208388][ T5831] other info that might help us debug this: [ 71.216725][ T5831] Possible unsafe locking scenario: [ 71.216725][ T5831] [ 71.224181][ T5831] CPU0 [ 71.227522][ T5831] ---- [ 71.230833][ T5831] lock(&tree->tree_lock/1); [ 71.235543][ T5831] lock(&tree->tree_lock/1); [ 71.240242][ T5831] [ 71.240242][ T5831] *** DEADLOCK *** [ 71.240242][ T5831] [ 71.249090][ T5831] May be due to missing lock nesting notation [ 71.249090][ T5831] [ 71.257403][ T5831] 5 locks held by syz-executor167/5831: [ 71.262967][ T5831] #0: ffff888060da0420 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 [ 71.271894][ T5831] #1: ffff888034d582f8 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: generic_file_write_iter+0x82/0x310 [ 71.283275][ T5831] #2: ffff888034d58108 (&hip->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21b/0x1b70 [ 71.293657][ T5831] #3: ffff888060da20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x14a/0x1c0 [ 71.303796][ T5831] #4: ffff888012018108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21b/0x1b70 [ 71.315318][ T5831] [ 71.315318][ T5831] stack backtrace: [ 71.321217][ T5831] CPU: 0 UID: 0 PID: 5831 Comm: syz-executor167 Not tainted 6.13.0-rc3-next-20241220-syzkaller #0 [ 71.321238][ T5831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 71.321250][ T5831] Call Trace: [ 71.321258][ T5831] [ 71.321265][ T5831] dump_stack_lvl+0x241/0x360 [ 71.321286][ T5831] ? __pfx_dump_stack_lvl+0x10/0x10 [ 71.321300][ T5831] ? __pfx__printk+0x10/0x10 [ 71.321318][ T5831] ? lockdep_unlock+0x16a/0x300 [ 71.321337][ T5831] print_deadlock_bug+0x483/0x620 [ 71.321352][ T5831] validate_chain+0x15e2/0x5920 [ 71.321374][ T5831] ? mark_lock+0x9a/0x360 [ 71.321391][ T5831] ? __lock_acquire+0x1397/0x2100 [ 71.321407][ T5831] ? __pfx_validate_chain+0x10/0x10 [ 71.321431][ T5831] ? mark_lock+0x9a/0x360 [ 71.321448][ T5831] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 71.321465][ T5831] ? mark_lock+0x9a/0x360 [ 71.321482][ T5831] __lock_acquire+0x1397/0x2100 [ 71.321503][ T5831] lock_acquire+0x1ed/0x550 [ 71.321518][ T5831] ? hfsplus_find_init+0x14a/0x1c0 [ 71.321540][ T5831] ? __pfx_lock_acquire+0x10/0x10 [ 71.321555][ T5831] ? hfsplus_find_init+0x85/0x1c0 [ 71.321573][ T5831] ? hfsplus_file_extend+0x454/0x1b70 [ 71.321588][ T5831] ? __pfx___might_resched+0x10/0x10 [ 71.321608][ T5831] ? hfsplus_get_block+0x406/0x14f0 [ 71.321622][ T5831] ? __block_write_begin_int+0x692/0x19a0 [ 71.321635][ T5831] ? cont_write_begin+0x77f/0xb40 [ 71.321649][ T5831] ? hfsplus_write_begin+0x68/0xb0 [ 71.321662][ T5831] ? generic_perform_write+0x346/0x990 [ 71.321678][ T5831] ? generic_file_write_iter+0xae/0x310 [ 71.321693][ T5831] ? vfs_write+0xacf/0xd10 [ 71.321710][ T5831] ? ksys_write+0x18f/0x2b0 [ 71.321724][ T5831] ? do_syscall_64+0xf3/0x230 [ 71.321744][ T5831] __mutex_lock+0x1ac/0xee0 [ 71.321756][ T5831] ? hfsplus_find_init+0x14a/0x1c0 [ 71.321777][ T5831] ? hfsplus_find_init+0x14a/0x1c0 [ 71.321795][ T5831] ? __pfx___mutex_lock+0x10/0x10 [ 71.321809][ T5831] ? rcu_is_watching+0x15/0xb0 [ 71.321822][ T5831] ? __kmalloc_noprof+0x2a5/0x4c0 [ 71.321834][ T5831] ? hfsplus_find_init+0x85/0x1c0 [ 71.321854][ T5831] hfsplus_find_init+0x14a/0x1c0 [ 71.321872][ T5831] hfsplus_file_extend+0x454/0x1b70 [ 71.321891][ T5831] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 71.321907][ T5831] ? __pfx___mutex_trylock_common+0x10/0x10 [ 71.321922][ T5831] ? trace_contention_end+0x3c/0x120 [ 71.321936][ T5831] ? __mutex_lock+0x37f/0xee0 [ 71.321950][ T5831] ? hfsplus_brec_find+0x19d/0x570 [ 71.321964][ T5831] hfsplus_bmap_reserve+0x105/0x4e0 [ 71.321985][ T5831] __hfsplus_ext_write_extent+0x2a4/0x5c0 [ 71.322002][ T5831] __hfsplus_ext_cache_extent+0x84/0xe10 [ 71.322020][ T5831] hfsplus_file_extend+0x48c/0x1b70 [ 71.322038][ T5831] ? __pfx_hfsplus_file_extend+0x10/0x10 [ 71.322055][ T5831] ? clean_bdev_aliases+0x6f8/0x890 [ 71.322070][ T5831] ? __pfx_clean_bdev_aliases+0x10/0x10 [ 71.322085][ T5831] hfsplus_get_block+0x406/0x14f0 [ 71.322103][ T5831] ? __pfx_hfsplus_get_block+0x10/0x10 [ 71.322119][ T5831] ? _raw_spin_unlock+0x28/0x50 [ 71.322134][ T5831] ? create_empty_buffers+0x471/0x530 [ 71.322148][ T5831] __block_write_begin_int+0x692/0x19a0 [ 71.322162][ T5831] ? __pfx_filemap_alloc_folio_noprof+0x10/0x10 [ 71.322179][ T5831] ? irqentry_exit+0x63/0x90 [ 71.322196][ T5831] ? __pfx_hfsplus_get_block+0x10/0x10 [ 71.322210][ T5831] ? __pfx___block_write_begin_int+0x10/0x10 [ 71.322226][ T5831] cont_write_begin+0x77f/0xb40 [ 71.322243][ T5831] ? __pfx_cont_write_begin+0x10/0x10 [ 71.322256][ T5831] ? __pfx_fault_in_readable+0x10/0x10 [ 71.322272][ T5831] ? __mark_inode_dirty+0x3db/0xe90 [ 71.322287][ T5831] hfsplus_write_begin+0x68/0xb0 [ 71.322301][ T5831] ? __pfx_hfsplus_get_block+0x10/0x10 [ 71.322316][ T5831] generic_perform_write+0x346/0x990 [ 71.322335][ T5831] ? __pfx_generic_perform_write+0x10/0x10 [ 71.322350][ T5831] ? file_update_time+0x3dd/0x450 [ 71.322367][ T5831] ? __generic_file_write_iter+0x102/0x230 [ 71.322384][ T5831] generic_file_write_iter+0xae/0x310 [ 71.322400][ T5831] vfs_write+0xacf/0xd10 [ 71.322416][ T5831] ? __pfx_generic_file_write_iter+0x10/0x10 [ 71.322432][ T5831] ? __pfx_vfs_write+0x10/0x10 [ 71.322450][ T5831] ? _raw_spin_unlock_irq+0x2e/0x50 [ 71.322465][ T5831] ? ptrace_notify+0x279/0x380 [ 71.322479][ T5831] ksys_write+0x18f/0x2b0 [ 71.322495][ T5831] ? __pfx_ksys_write+0x10/0x10 [ 71.322510][ T5831] ? exc_page_fault+0x590/0x8b0 [ 71.322529][ T5831] do_syscall_64+0xf3/0x230 [ 71.322541][ T5831] ? clear_bhb_loop+0x35/0x90 [ 71.322561][ T5831] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.322577][ T5831] RIP: 0033:0x7f75be876ad9 [ 71.322600][ T5831] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 71.322612][ T5831] RSP: 002b:00007ffc36152418 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 71.322627][ T5831] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f75be876ad9 [ 71.322637][ T5831] RDX: 000000000208e24b RSI: 0000000020000240 RDI: 0000000000000004 [ 71.322646][ T5831] RBP: 00007f75be8ea5f0 R08: 000055558f6f24c0 R09: 000055558f6f24c0 [ 71.322656][ T5831] R10: 00000000000006fb R11: 0000000000000246 R12: 00007ffc36152440 [ 71.322665][ T5831] R13: 00007ffc36152668 R14: 431bde82d7b634db R15: 00007f75be8bf03b [ 71.322679][ T5831] [pid 5831] write(4, "\x23\x21\x20\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651 [pid 5830] kill(-5831, SIGKILL) = 0 [pid 5830] kill(5831, SIGKILL) = 0 [pid 5830] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5830] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5830] getdents64(3, 0x55558f6f26f0 /* 2 entries */, 32768) = 48 [pid 5830] getdents64(3, 0x55558f6f26f0 /* 0 entries */, 32768) = 0 [pid 5830] close(3) = 0