./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1353918297 <...> Warning: Permanently added '10.128.0.251' (ED25519) to the list of known hosts. execve("./syz-executor1353918297", ["./syz-executor1353918297"], 0x7ffe2f868c50 /* 10 vars */) = 0 brk(NULL) = 0x555590a6c000 brk(0x555590a6cd00) = 0x555590a6cd00 arch_prctl(ARCH_SET_FS, 0x555590a6c380) = 0 set_tid_address(0x555590a6c650) = 5221 set_robust_list(0x555590a6c660, 24) = 0 rseq(0x555590a6cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1353918297", 4096) = 28 getrandom("\x07\xd3\xf6\x3a\x5c\x89\x73\x4d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555590a6cd00 brk(0x555590a8dd00) = 0x555590a8dd00 brk(0x555590a8e000) = 0x555590a8e000 mprotect(0x7f311ab00000, 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) = 0x7f3112600000 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(0x7f3112600000, 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 [ 53.944397][ T5221] loop0: detected capacity change from 0 to 32768 [ 53.963851][ T5221] ======================================================= [ 53.963851][ T5221] WARNING: The mand mount option has been deprecated and [ 53.963851][ T5221] and is ignored by this kernel. Remove the mand [ 53.963851][ T5221] option from the mount to silence this warning. [ 53.963851][ T5221] ======================================================= [ 54.056574][ T5221] 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 [ 54.075601][ T5221] [ 54.077923][ T5221] ============================================ [ 54.084138][ T5221] WARNING: possible recursive locking detected [ 54.090270][ T5221] 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0 Not tainted [ 54.097413][ T5221] -------------------------------------------- [ 54.103540][ T5221] syz-executor135/5221 is trying to acquire lock: [ 54.109930][ T5221] ffff88807d380908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 54.119770][ T5221] [ 54.119770][ T5221] but task is already holding lock: [ 54.127115][ T5221] ffff88807d380908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 54.136841][ T5221] [ 54.136841][ T5221] other info that might help us debug this: [ 54.144903][ T5221] Possible unsafe locking scenario: [ 54.144903][ T5221] [ 54.152338][ T5221] CPU0 [ 54.155608][ T5221] ---- [ 54.158865][ T5221] lock(&c->sb_lock); [ 54.162931][ T5221] lock(&c->sb_lock); [ 54.166993][ T5221] [ 54.166993][ T5221] *** DEADLOCK *** [ 54.166993][ T5221] [ 54.175120][ T5221] May be due to missing lock nesting notation [ 54.175120][ T5221] [ 54.183416][ T5221] 2 locks held by syz-executor135/5221: [ 54.188936][ T5221] #0: ffff88807d380278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 54.198248][ T5221] #1: ffff88807d380908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 54.208407][ T5221] [ 54.208407][ T5221] stack backtrace: [ 54.214288][ T5221] CPU: 1 UID: 0 PID: 5221 Comm: syz-executor135 Not tainted 6.12.0-rc1-syzkaller-00042-gf23aa4c0761a #0 [ 54.225390][ T5221] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 54.235440][ T5221] Call Trace: [ 54.238707][ T5221] [ 54.241625][ T5221] dump_stack_lvl+0x241/0x360 [ 54.246418][ T5221] ? __pfx_dump_stack_lvl+0x10/0x10 [ 54.252572][ T5221] ? __pfx__printk+0x10/0x10 [ 54.257328][ T5221] ? lockdep_unlock+0x16a/0x300 [ 54.262167][ T5221] print_deadlock_bug+0x483/0x620 [ 54.267189][ T5221] validate_chain+0x15e2/0x5920 [ 54.272028][ T5221] ? __pfx_validate_chain+0x10/0x10 [ 54.277227][ T5221] ? mark_lock+0x9a/0x360 [ 54.281538][ T5221] ? __lock_acquire+0x1384/0x2050 [ 54.286558][ T5221] ? mark_lock+0x9a/0x360 [ 54.290881][ T5221] __lock_acquire+0x1384/0x2050 [ 54.295753][ T5221] lock_acquire+0x1ed/0x550 [ 54.300264][ T5221] ? bch2_replicas_entry_validate+0x2a/0x80 [ 54.306157][ T5221] ? __pfx_lock_acquire+0x10/0x10 [ 54.311176][ T5221] ? lockdep_hardirqs_on+0x99/0x150 [ 54.316361][ T5221] ? __pfx___might_resched+0x10/0x10 [ 54.321638][ T5221] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 54.327516][ T5221] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 54.333912][ T5221] ? stack_trace_save+0x118/0x1d0 [ 54.338921][ T5221] __mutex_lock+0x136/0xd70 [ 54.343405][ T5221] ? bch2_replicas_entry_validate+0x2a/0x80 [ 54.349296][ T5221] ? kasan_save_track+0x51/0x80 [ 54.354139][ T5221] ? kasan_save_track+0x3f/0x80 [ 54.358977][ T5221] ? __kasan_kmalloc+0x98/0xb0 [ 54.363749][ T5221] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 54.370322][ T5221] ? kmemdup_noprof+0x2a/0x60 [ 54.375000][ T5221] ? bch2_read_superblock_clean+0xd6/0x520 [ 54.380793][ T5221] ? bch2_replicas_entry_validate+0x2a/0x80 [ 54.386676][ T5221] ? bch2_fs_start+0x356/0x5b0 [ 54.391423][ T5221] ? __pfx___mutex_lock+0x10/0x10 [ 54.396430][ T5221] ? do_syscall_64+0xf3/0x230 [ 54.401284][ T5221] bch2_replicas_entry_validate+0x2a/0x80 [ 54.406991][ T5221] journal_entry_data_usage_validate+0x2b6/0x690 [ 54.413303][ T5221] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 54.420145][ T5221] ? journal_entry_usage_validate+0xc2/0x360 [ 54.426109][ T5221] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 54.432505][ T5221] ? rcu_is_watching+0x15/0xb0 [ 54.437251][ T5221] ? trace_kmalloc+0x1f/0xd0 [ 54.441829][ T5221] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 54.448396][ T5221] ? kmemdup_noprof+0x45/0x60 [ 54.453055][ T5221] ? bch2_journal_entry_validate+0x6a/0xf0 [ 54.458839][ T5221] bch2_read_superblock_clean+0x207/0x520 [ 54.464553][ T5221] bch2_fs_recovery+0x1f4/0x39c0 [ 54.469485][ T5221] ? mark_lock+0x9a/0x360 [ 54.473799][ T5221] ? __lock_acquire+0x1384/0x2050 [ 54.478808][ T5221] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 54.484165][ T5221] ? __pfx_lock_release+0x10/0x10 [ 54.489193][ T5221] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 54.494831][ T5221] ? __pfx_lock_release+0x10/0x10 [ 54.499935][ T5221] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 54.505557][ T5221] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 54.511265][ T5221] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 54.516977][ T5221] ? llist_reverse_order+0x72/0x90 [ 54.522068][ T5221] bch2_fs_start+0x356/0x5b0 [ 54.526661][ T5221] bch2_fs_get_tree+0xd68/0x1710 [ 54.531614][ T5221] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 54.536973][ T5221] ? smack_fs_context_parse_param+0xff/0x170 [ 54.542948][ T5221] ? generic_parse_monolithic+0x387/0x400 [ 54.548676][ T5221] ? cap_capable+0x1b4/0x250 [ 54.553258][ T5221] ? safesetid_security_capable+0xb2/0x1d0 [ 54.559069][ T5221] vfs_get_tree+0x90/0x2b0 [ 54.563498][ T5221] do_new_mount+0x2be/0xb40 [ 54.567990][ T5221] ? __pfx_do_new_mount+0x10/0x10 [ 54.573003][ T5221] __se_sys_mount+0x2d6/0x3c0 [ 54.577666][ T5221] ? __pfx___se_sys_mount+0x10/0x10 [ 54.582848][ T5221] ? do_syscall_64+0x100/0x230 [ 54.587593][ T5221] ? __x64_sys_mount+0x20/0xc0 [ 54.592346][ T5221] do_syscall_64+0xf3/0x230 [ 54.596830][ T5221] ? clear_bhb_loop+0x35/0x90 [ 54.601491][ T5221] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.607378][ T5221] RIP: 0033:0x7f311aa88c3a [ 54.611779][ T5221] 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 [ 54.631384][ T5221] RSP: 002b:00007fff4aa26358 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 54.639786][ T5221] RAX: ffffffffffffffda RBX: 00007fff4aa26370 RCX: 00007f311aa88c3a [ 54.647742][ T5221] RDX: 0000000020005d80 RSI: 0000000020000240 RDI: 00007fff4aa26370 [ 54.655714][ T5221] RBP: 0000000000000004 R08: 00007fff4aa263b0 R09: 0000000000005e0b [ 54.663676][ T5221] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 54.671633][ T5221] R13: 00007fff4aa263b0 R14: 0000000000000003 R15: 0000000001000000 [ 54.679612][ T5221]