./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3857140644 <...> Warning: Permanently added '10.128.1.249' (ED25519) to the list of known hosts. execve("./syz-executor3857140644", ["./syz-executor3857140644"], 0x7fff5aa100e0 /* 10 vars */) = 0 brk(NULL) = 0x555557f6b000 brk(0x555557f6bd00) = 0x555557f6bd00 arch_prctl(ARCH_SET_FS, 0x555557f6b380) = 0 set_tid_address(0x555557f6b650) = 5218 set_robust_list(0x555557f6b660, 24) = 0 rseq(0x555557f6bca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3857140644", 4096) = 28 getrandom("\x2f\x96\xf7\x56\xaf\x84\x8f\x1b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557f6bd00 brk(0x555557f8cd00) = 0x555557f8cd00 brk(0x555557f8d000) = 0x555557f8d000 mprotect(0x7fd1428b4000, 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) = 0x7fd13a200000 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(0x7fd13a200000, 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 [ 70.835097][ T5218] loop0: detected capacity change from 0 to 32768 [ 70.905445][ T5218] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,metadata_target=invalid device 255,noshard_inode_numbers,noinodes_use_key_cache,journal_flush_delay=1001,nojournal_transaction_names [ 70.931785][ T5218] [ 70.934127][ T5218] ============================================ [ 70.940260][ T5218] WARNING: possible recursive locking detected [ 70.946407][ T5218] 6.12.0-rc2-syzkaller-00100-geb952c47d154 #0 Not tainted [ 70.953529][ T5218] -------------------------------------------- [ 70.959670][ T5218] syz-executor385/5218 is trying to acquire lock: [ 70.966067][ T5218] ffff888075a80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 70.975912][ T5218] [ 70.975912][ T5218] but task is already holding lock: [ 70.983256][ T5218] ffff888075a80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 70.992988][ T5218] [ 70.992988][ T5218] other info that might help us debug this: [ 71.001030][ T5218] Possible unsafe locking scenario: [ 71.001030][ T5218] [ 71.008469][ T5218] CPU0 [ 71.011752][ T5218] ---- [ 71.015019][ T5218] lock(&c->sb_lock); [ 71.019094][ T5218] lock(&c->sb_lock); [ 71.023172][ T5218] [ 71.023172][ T5218] *** DEADLOCK *** [ 71.023172][ T5218] [ 71.031313][ T5218] May be due to missing lock nesting notation [ 71.031313][ T5218] [ 71.039628][ T5218] 2 locks held by syz-executor385/5218: [ 71.045164][ T5218] #0: ffff888075a80278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 71.054608][ T5218] #1: ffff888075a80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 71.064808][ T5218] [ 71.064808][ T5218] stack backtrace: [ 71.070800][ T5218] CPU: 0 UID: 0 PID: 5218 Comm: syz-executor385 Not tainted 6.12.0-rc2-syzkaller-00100-geb952c47d154 #0 [ 71.081910][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 71.091968][ T5218] Call Trace: [ 71.095290][ T5218] [ 71.098217][ T5218] dump_stack_lvl+0x241/0x360 [ 71.102898][ T5218] ? __pfx_dump_stack_lvl+0x10/0x10 [ 71.108092][ T5218] ? __pfx__printk+0x10/0x10 [ 71.112697][ T5218] ? lockdep_unlock+0x16a/0x300 [ 71.117567][ T5218] print_deadlock_bug+0x483/0x620 [ 71.122593][ T5218] validate_chain+0x15e2/0x5920 [ 71.127445][ T5218] ? __pfx___bfs+0x10/0x10 [ 71.131875][ T5218] ? __pfx_validate_chain+0x10/0x10 [ 71.137072][ T5218] ? mark_lock+0x9a/0x360 [ 71.141397][ T5218] ? __lock_acquire+0x1384/0x2050 [ 71.146423][ T5218] ? mark_lock+0x9a/0x360 [ 71.150774][ T5218] __lock_acquire+0x1384/0x2050 [ 71.155743][ T5218] lock_acquire+0x1ed/0x550 [ 71.160257][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 71.166145][ T5218] ? __pfx_lock_acquire+0x10/0x10 [ 71.171164][ T5218] ? lockdep_hardirqs_on+0x99/0x150 [ 71.176355][ T5218] ? __pfx___might_resched+0x10/0x10 [ 71.181633][ T5218] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 71.187525][ T5218] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 71.193851][ T5218] ? stack_trace_save+0x118/0x1d0 [ 71.198899][ T5218] __mutex_lock+0x136/0xd70 [ 71.203387][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 71.209268][ T5218] ? kasan_save_track+0x51/0x80 [ 71.214119][ T5218] ? kasan_save_track+0x3f/0x80 [ 71.218967][ T5218] ? __kasan_kmalloc+0x98/0xb0 [ 71.223723][ T5218] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 71.230316][ T5218] ? kmemdup_noprof+0x2a/0x60 [ 71.234987][ T5218] ? bch2_read_superblock_clean+0xd6/0x520 [ 71.240805][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 71.246781][ T5218] ? bch2_fs_start+0x356/0x5b0 [ 71.251545][ T5218] ? __pfx___mutex_lock+0x10/0x10 [ 71.256574][ T5218] ? do_syscall_64+0xf3/0x230 [ 71.261257][ T5218] bch2_replicas_entry_validate+0x2a/0x80 [ 71.267057][ T5218] journal_entry_data_usage_validate+0x2b6/0x690 [ 71.273391][ T5218] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 71.280235][ T5218] ? journal_entry_usage_validate+0xc2/0x360 [ 71.286236][ T5218] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 71.292673][ T5218] ? rcu_is_watching+0x15/0xb0 [ 71.297435][ T5218] ? trace_kmalloc+0x1f/0xd0 [ 71.302017][ T5218] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 71.308600][ T5218] ? kmemdup_noprof+0x45/0x60 [ 71.313280][ T5218] ? bch2_journal_entry_validate+0x6a/0xf0 [ 71.319077][ T5218] bch2_read_superblock_clean+0x207/0x520 [ 71.324790][ T5218] bch2_fs_recovery+0x1f4/0x39c0 [ 71.329727][ T5218] ? mark_lock+0x9a/0x360 [ 71.334064][ T5218] ? __lock_acquire+0x1384/0x2050 [ 71.339085][ T5218] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 71.344468][ T5218] ? __pfx_lock_release+0x10/0x10 [ 71.349490][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 71.355206][ T5218] ? __pfx_lock_release+0x10/0x10 [ 71.360244][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 71.365892][ T5218] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 71.371655][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 71.377312][ T5218] ? llist_reverse_order+0x72/0x90 [ 71.382416][ T5218] bch2_fs_start+0x356/0x5b0 [ 71.387101][ T5218] bch2_fs_get_tree+0xd68/0x1710 [ 71.392043][ T5218] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 71.397418][ T5218] ? generic_parse_monolithic+0x387/0x400 [ 71.403140][ T5218] ? cap_capable+0x1b4/0x250 [ 71.407724][ T5218] ? safesetid_security_capable+0xb2/0x1d0 [ 71.413541][ T5218] vfs_get_tree+0x90/0x2b0 [ 71.417957][ T5218] do_new_mount+0x2be/0xb40 [ 71.422459][ T5218] ? __pfx_do_new_mount+0x10/0x10 [ 71.427524][ T5218] __se_sys_mount+0x2d6/0x3c0 [ 71.432218][ T5218] ? __pfx___se_sys_mount+0x10/0x10 [ 71.437423][ T5218] ? do_syscall_64+0x100/0x230 [ 71.442206][ T5218] ? __x64_sys_mount+0x20/0xc0 [ 71.446973][ T5218] do_syscall_64+0xf3/0x230 [ 71.451471][ T5218] ? clear_bhb_loop+0x35/0x90 [ 71.456140][ T5218] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.462047][ T5218] RIP: 0033:0x7fd14283cc3a [ 71.466458][ 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 [ 71.486064][ T5218] RSP: 002b:00007ffec4925598 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 71.494503][ T5218] RAX: ffffffffffffffda RBX: 00007ffec49255b0 RCX: 00007fd14283cc3a [ 71.502460][ T5218] RDX: 0000000020000180 RSI: 0000000020000140 RDI: 00007ffec49255b0 [ 71.510435][ T5218] RBP: 0000000000000004 R08: 00007ffec49255f0 R09: 00000000000058a7 [ 71.518395][ T5218] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 [ 71.526365][ T5218] R13: 00007ffec49255f0 R14: 0000000000000003 R15: 0000000001000000 [ 71.534334][ T5218]