./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2292107429 <...> Warning: Permanently added '10.128.1.15' (ED25519) to the list of known hosts. execve("./syz-executor2292107429", ["./syz-executor2292107429"], 0x7ffc17fc3310 /* 10 vars */) = 0 brk(NULL) = 0x55558cde9000 brk(0x55558cde9d00) = 0x55558cde9d00 arch_prctl(ARCH_SET_FS, 0x55558cde9380) = 0 set_tid_address(0x55558cde9650) = 5220 set_robust_list(0x55558cde9660, 24) = 0 rseq(0x55558cde9ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2292107429", 4096) = 28 getrandom("\x64\xc3\x2f\xf7\xe3\xf7\x89\xdf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558cde9d00 brk(0x55558ce0ad00) = 0x55558ce0ad00 brk(0x55558ce0b000) = 0x55558ce0b000 mprotect(0x7fa68f78e000, 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 write(1, "executing program\n", 18executing program ) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa687200000 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(0x7fa687200000, 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 [ 55.756387][ T5220] loop0: detected capacity change from 0 to 32768 [ 55.858003][ T5220] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,compression=lz4,nojournal_transaction_names [ 55.870985][ T5220] [ 55.873299][ T5220] ============================================ [ 55.879420][ T5220] WARNING: possible recursive locking detected [ 55.885542][ T5220] 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 Not tainted [ 55.892620][ T5220] -------------------------------------------- [ 55.898740][ T5220] syz-executor229/5220 is trying to acquire lock: [ 55.905123][ T5220] ffff888077d80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 55.914942][ T5220] [ 55.914942][ T5220] but task is already holding lock: [ 55.922282][ T5220] ffff888077d80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 55.931992][ T5220] [ 55.931992][ T5220] other info that might help us debug this: [ 55.940020][ T5220] Possible unsafe locking scenario: [ 55.940020][ T5220] [ 55.947441][ T5220] CPU0 [ 55.950698][ T5220] ---- [ 55.953952][ T5220] lock(&c->sb_lock); [ 55.958000][ T5220] lock(&c->sb_lock); [ 55.962043][ T5220] [ 55.962043][ T5220] *** DEADLOCK *** [ 55.962043][ T5220] [ 55.970161][ T5220] May be due to missing lock nesting notation [ 55.970161][ T5220] [ 55.978457][ T5220] 2 locks held by syz-executor229/5220: [ 55.983984][ T5220] #0: ffff888077d80278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 55.993286][ T5220] #1: ffff888077d80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 56.003450][ T5220] [ 56.003450][ T5220] stack backtrace: [ 56.009328][ T5220] CPU: 0 UID: 0 PID: 5220 Comm: syz-executor229 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 [ 56.020419][ T5220] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 56.030465][ T5220] Call Trace: [ 56.033732][ T5220] [ 56.036649][ T5220] dump_stack_lvl+0x241/0x360 [ 56.041320][ T5220] ? __pfx_dump_stack_lvl+0x10/0x10 [ 56.046502][ T5220] ? __pfx__printk+0x10/0x10 [ 56.051081][ T5220] ? lockdep_unlock+0x16a/0x300 [ 56.055923][ T5220] print_deadlock_bug+0x483/0x620 [ 56.060935][ T5220] validate_chain+0x15e2/0x5920 [ 56.065775][ T5220] ? __pfx___bfs+0x10/0x10 [ 56.070186][ T5220] ? __pfx_validate_chain+0x10/0x10 [ 56.075374][ T5220] ? mark_lock+0x9a/0x360 [ 56.079690][ T5220] ? __lock_acquire+0x1384/0x2050 [ 56.084705][ T5220] ? mark_lock+0x9a/0x360 [ 56.089019][ T5220] __lock_acquire+0x1384/0x2050 [ 56.093862][ T5220] lock_acquire+0x1ed/0x550 [ 56.098354][ T5220] ? bch2_replicas_entry_validate+0x2a/0x80 [ 56.104234][ T5220] ? __pfx_lock_acquire+0x10/0x10 [ 56.109246][ T5220] ? lockdep_hardirqs_on+0x99/0x150 [ 56.114433][ T5220] ? __pfx___might_resched+0x10/0x10 [ 56.119705][ T5220] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 56.125584][ T5220] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 56.131897][ T5220] ? stack_trace_save+0x118/0x1d0 [ 56.136910][ T5220] __mutex_lock+0x136/0xd70 [ 56.141394][ T5220] ? bch2_replicas_entry_validate+0x2a/0x80 [ 56.147270][ T5220] ? kasan_save_track+0x51/0x80 [ 56.152107][ T5220] ? kasan_save_track+0x3f/0x80 [ 56.156942][ T5220] ? __kasan_kmalloc+0x98/0xb0 [ 56.161691][ T5220] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 56.168263][ T5220] ? kmemdup_noprof+0x2a/0x60 [ 56.172924][ T5220] ? bch2_read_superblock_clean+0xd6/0x520 [ 56.178715][ T5220] ? bch2_replicas_entry_validate+0x2a/0x80 [ 56.184591][ T5220] ? bch2_fs_start+0x356/0x5b0 [ 56.189360][ T5220] ? __pfx___mutex_lock+0x10/0x10 [ 56.194376][ T5220] ? do_syscall_64+0xf3/0x230 [ 56.199047][ T5220] bch2_replicas_entry_validate+0x2a/0x80 [ 56.204753][ T5220] journal_entry_data_usage_validate+0x2b6/0x690 [ 56.211069][ T5220] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 56.217904][ T5220] ? journal_entry_usage_validate+0xc2/0x360 [ 56.223870][ T5220] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 56.230271][ T5220] ? rcu_is_watching+0x15/0xb0 [ 56.235020][ T5220] ? trace_kmalloc+0x1f/0xd0 [ 56.239600][ T5220] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 56.246173][ T5220] ? kmemdup_noprof+0x45/0x60 [ 56.250839][ T5220] ? bch2_journal_entry_validate+0x6a/0xf0 [ 56.256638][ T5220] bch2_read_superblock_clean+0x207/0x520 [ 56.262354][ T5220] bch2_fs_recovery+0x1f4/0x39c0 [ 56.267290][ T5220] ? mark_lock+0x9a/0x360 [ 56.271695][ T5220] ? __lock_acquire+0x1384/0x2050 [ 56.276712][ T5220] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 56.282080][ T5220] ? __pfx_lock_release+0x10/0x10 [ 56.287095][ T5220] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 56.292716][ T5220] ? __pfx_lock_release+0x10/0x10 [ 56.297731][ T5220] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 56.303351][ T5220] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 56.309056][ T5220] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 56.314678][ T5220] ? llist_reverse_order+0x72/0x90 [ 56.319774][ T5220] bch2_fs_start+0x356/0x5b0 [ 56.324355][ T5220] bch2_fs_get_tree+0xd68/0x1710 [ 56.329293][ T5220] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 56.334663][ T5220] ? generic_parse_monolithic+0x387/0x400 [ 56.340374][ T5220] ? cap_capable+0x1b4/0x250 [ 56.344952][ T5220] ? safesetid_security_capable+0xb2/0x1d0 [ 56.350745][ T5220] vfs_get_tree+0x90/0x2b0 [ 56.355168][ T5220] do_new_mount+0x2be/0xb40 [ 56.359675][ T5220] ? __pfx_do_new_mount+0x10/0x10 [ 56.364782][ T5220] __se_sys_mount+0x2d6/0x3c0 [ 56.369458][ T5220] ? __pfx___se_sys_mount+0x10/0x10 [ 56.374660][ T5220] ? do_syscall_64+0x100/0x230 [ 56.379418][ T5220] ? __x64_sys_mount+0x20/0xc0 [ 56.384188][ T5220] do_syscall_64+0xf3/0x230 [ 56.388688][ T5220] ? clear_bhb_loop+0x35/0x90 [ 56.393353][ T5220] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.399246][ T5220] RIP: 0033:0x7fa68f7168fa [ 56.403650][ T5220] 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 [ 56.423245][ T5220] RSP: 002b:00007ffc47b20058 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 56.431649][ T5220] RAX: ffffffffffffffda RBX: 00007ffc47b20070 RCX: 00007fa68f7168fa [ 56.439608][ T5220] RDX: 0000000020005d80 RSI: 0000000020005dc0 RDI: 00007ffc47b20070 [ 56.447577][ T5220] RBP: 0000000000000004 R08: 00007ffc47b200b0 R09: 0000000000005d77 [ 56.455538][ T5220] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 [ 56.463493][ T5220] R13: 00007ffc47b200b0 R14: 0000000000000003 R15: 0000000001000000 [ 56.471460][ T5220]