./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor69225188 <...> Warning: Permanently added '10.128.0.48' (ED25519) to the list of known hosts. execve("./syz-executor69225188", ["./syz-executor69225188"], 0x7ffec29186d0 /* 10 vars */) = 0 brk(NULL) = 0x55556ad85000 brk(0x55556ad85d00) = 0x55556ad85d00 arch_prctl(ARCH_SET_FS, 0x55556ad85380) = 0 set_tid_address(0x55556ad85650) = 5218 set_robust_list(0x55556ad85660, 24) = 0 rseq(0x55556ad85ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor69225188", 4096) = 26 getrandom("\x6d\xb9\xa6\x6d\xb3\xac\xe9\x1c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556ad85d00 brk(0x55556ada6d00) = 0x55556ada6d00 brk(0x55556ada7000) = 0x55556ada7000 mprotect(0x7f79a646a000, 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) = 0x7f799de00000 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"..., 16777216) = 16777216 munmap(0x7f799de00000, 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 [ 56.208905][ T5218] loop0: detected capacity change from 0 to 32768 [ 56.251553][ T5218] ======================================================= [ 56.251553][ T5218] WARNING: The mand mount option has been deprecated and [ 56.251553][ T5218] and is ignored by this kernel. Remove the mand [ 56.251553][ T5218] option from the mount to silence this warning. [ 56.251553][ T5218] ======================================================= [ 56.358127][ T5218] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,compression=zstd,norecovery,recovery_pass_last=check_dirents,nojournal_transaction_names,version_upgrade=none [ 56.377004][ T5218] [ 56.379322][ T5218] ============================================ [ 56.385446][ T5218] WARNING: possible recursive locking detected [ 56.391569][ T5218] 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 Not tainted [ 56.398690][ T5218] -------------------------------------------- [ 56.404826][ T5218] syz-executor692/5218 is trying to acquire lock: [ 56.411338][ T5218] ffff888073080908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 56.421185][ T5218] [ 56.421185][ T5218] but task is already holding lock: [ 56.428529][ T5218] ffff888073080908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 56.438251][ T5218] [ 56.438251][ T5218] other info that might help us debug this: [ 56.446303][ T5218] Possible unsafe locking scenario: [ 56.446303][ T5218] [ 56.453750][ T5218] CPU0 [ 56.457010][ T5218] ---- [ 56.460283][ T5218] lock(&c->sb_lock); [ 56.464361][ T5218] lock(&c->sb_lock); [ 56.468426][ T5218] [ 56.468426][ T5218] *** DEADLOCK *** [ 56.468426][ T5218] [ 56.476566][ T5218] May be due to missing lock nesting notation [ 56.476566][ T5218] [ 56.484894][ T5218] 2 locks held by syz-executor692/5218: [ 56.490434][ T5218] #0: ffff888073080278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 56.499742][ T5218] #1: ffff888073080908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 56.509925][ T5218] [ 56.509925][ T5218] stack backtrace: [ 56.515814][ T5218] CPU: 1 UID: 0 PID: 5218 Comm: syz-executor692 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 [ 56.526927][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 56.536988][ T5218] Call Trace: [ 56.540262][ T5218] [ 56.543183][ T5218] dump_stack_lvl+0x241/0x360 [ 56.547870][ T5218] ? __pfx_dump_stack_lvl+0x10/0x10 [ 56.553057][ T5218] ? __pfx__printk+0x10/0x10 [ 56.557652][ T5218] ? lockdep_unlock+0x16a/0x300 [ 56.562488][ T5218] print_deadlock_bug+0x483/0x620 [ 56.567497][ T5218] validate_chain+0x15e2/0x5920 [ 56.572340][ T5218] ? __pfx___bfs+0x10/0x10 [ 56.576763][ T5218] ? __pfx_validate_chain+0x10/0x10 [ 56.581941][ T5218] ? mark_lock+0x9a/0x360 [ 56.586250][ T5218] ? __lock_acquire+0x1384/0x2050 [ 56.591277][ T5218] ? mark_lock+0x9a/0x360 [ 56.595584][ T5218] __lock_acquire+0x1384/0x2050 [ 56.600436][ T5218] lock_acquire+0x1ed/0x550 [ 56.604923][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 56.610800][ T5218] ? __pfx_lock_acquire+0x10/0x10 [ 56.615809][ T5218] ? lockdep_hardirqs_on+0x99/0x150 [ 56.621006][ T5218] ? __pfx___might_resched+0x10/0x10 [ 56.626271][ T5218] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 56.632158][ T5218] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 56.638479][ T5218] ? stack_trace_save+0x118/0x1d0 [ 56.643493][ T5218] __mutex_lock+0x136/0xd70 [ 56.648021][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 56.653914][ T5218] ? kasan_save_track+0x51/0x80 [ 56.658860][ T5218] ? kasan_save_track+0x3f/0x80 [ 56.663705][ T5218] ? __kasan_kmalloc+0x98/0xb0 [ 56.668450][ T5218] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 56.675016][ T5218] ? kmemdup_noprof+0x2a/0x60 [ 56.679672][ T5218] ? bch2_read_superblock_clean+0xd6/0x520 [ 56.685482][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 56.691366][ T5218] ? bch2_fs_start+0x356/0x5b0 [ 56.696112][ T5218] ? __pfx___mutex_lock+0x10/0x10 [ 56.701111][ T5218] ? do_syscall_64+0xf3/0x230 [ 56.705768][ T5218] bch2_replicas_entry_validate+0x2a/0x80 [ 56.711467][ T5218] journal_entry_data_usage_validate+0x2b6/0x690 [ 56.717798][ T5218] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 56.724633][ T5218] ? journal_entry_usage_validate+0xc2/0x360 [ 56.730695][ T5218] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 56.737090][ T5218] ? rcu_is_watching+0x15/0xb0 [ 56.741834][ T5218] ? trace_kmalloc+0x1f/0xd0 [ 56.746406][ T5218] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 56.752988][ T5218] ? kmemdup_noprof+0x45/0x60 [ 56.757677][ T5218] ? bch2_journal_entry_validate+0x6a/0xf0 [ 56.763475][ T5218] bch2_read_superblock_clean+0x207/0x520 [ 56.769185][ T5218] bch2_fs_recovery+0x1f4/0x39c0 [ 56.774128][ T5218] ? mark_lock+0x9a/0x360 [ 56.778450][ T5218] ? __lock_acquire+0x1384/0x2050 [ 56.783469][ T5218] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 56.788837][ T5218] ? __pfx_lock_release+0x10/0x10 [ 56.793859][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 56.799495][ T5218] ? __pfx_lock_release+0x10/0x10 [ 56.804518][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 56.810135][ T5218] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 56.815844][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 56.821467][ T5218] ? llist_reverse_order+0x72/0x90 [ 56.826573][ T5218] bch2_fs_start+0x356/0x5b0 [ 56.831151][ T5218] bch2_fs_get_tree+0xd68/0x1710 [ 56.836083][ T5218] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 56.841462][ T5218] ? generic_parse_monolithic+0x387/0x400 [ 56.847186][ T5218] ? cap_capable+0x1b4/0x250 [ 56.851762][ T5218] ? safesetid_security_capable+0xb2/0x1d0 [ 56.857569][ T5218] vfs_get_tree+0x90/0x2b0 [ 56.861977][ T5218] do_new_mount+0x2be/0xb40 [ 56.866472][ T5218] ? __pfx_do_new_mount+0x10/0x10 [ 56.871487][ T5218] __se_sys_mount+0x2d6/0x3c0 [ 56.876153][ T5218] ? __pfx___se_sys_mount+0x10/0x10 [ 56.881334][ T5218] ? do_syscall_64+0x100/0x230 [ 56.886080][ T5218] ? __x64_sys_mount+0x20/0xc0 [ 56.890827][ T5218] do_syscall_64+0xf3/0x230 [ 56.895312][ T5218] ? clear_bhb_loop+0x35/0x90 [ 56.899984][ T5218] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.905873][ T5218] RIP: 0033:0x7f79a63f2d3a [ 56.910270][ T5218] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 56.929875][ T5218] RSP: 002b:00007fff0f38f968 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 56.938275][ T5218] RAX: ffffffffffffffda RBX: 00007fff0f38f980 RCX: 00007f79a63f2d3a [ 56.946300][ T5218] RDX: 0000000020005d80 RSI: 0000000020000240 RDI: 00007fff0f38f980 [ 56.954269][ T5218] RBP: 0000000000000004 R08: 00007fff0f38f9c0 R09: 0000000000005daf [ 56.962223][ T5218] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 56.970204][ T5218] R13: 00007fff0f38f9c0 R14: 0000000000000003 R15: 0000000001000000 [ 56.978183][ T5218]