./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor615709222 <...> Warning: Permanently added '10.128.1.128' (ED25519) to the list of known hosts. execve("./syz-executor615709222", ["./syz-executor615709222"], 0x7ffc39245b70 /* 10 vars */) = 0 brk(NULL) = 0x5555589ee000 brk(0x5555589eed00) = 0x5555589eed00 arch_prctl(ARCH_SET_FS, 0x5555589ee380) = 0 set_tid_address(0x5555589ee650) = 5218 set_robust_list(0x5555589ee660, 24) = 0 rseq(0x5555589eeca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor615709222", 4096) = 27 getrandom("\x6a\x9f\x1b\x8e\x1e\x54\x61\x81", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555589eed00 brk(0x555558a0fd00) = 0x555558a0fd00 brk(0x555558a10000) = 0x555558a10000 mprotect(0x7f6a510ca000, 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) = 0x7f6a48c00000 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(0x7f6a48c00000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file2", 0777) = 0 [ 58.313221][ T5218] loop0: detected capacity change from 0 to 32768 [ 58.405706][ T5218] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=crc64,data_checksum=xxhash,str_hash=crc32c,nojournal_transaction_names,version_upgrade=none [ 58.423278][ T5218] [ 58.425622][ T5218] ============================================ [ 58.431767][ T5218] WARNING: possible recursive locking detected [ 58.437926][ T5218] 6.12.0-rc2-syzkaller-00291-g09f6b0c8904b #0 Not tainted [ 58.445030][ T5218] -------------------------------------------- [ 58.451172][ T5218] syz-executor615/5218 is trying to acquire lock: [ 58.457579][ T5218] ffff888075f80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 58.467551][ T5218] [ 58.467551][ T5218] but task is already holding lock: [ 58.474914][ T5218] ffff888075f80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 58.484687][ T5218] [ 58.484687][ T5218] other info that might help us debug this: [ 58.492742][ T5218] Possible unsafe locking scenario: [ 58.492742][ T5218] [ 58.500185][ T5218] CPU0 [ 58.503459][ T5218] ---- [ 58.506738][ T5218] lock(&c->sb_lock); [ 58.510811][ T5218] lock(&c->sb_lock); [ 58.514933][ T5218] [ 58.514933][ T5218] *** DEADLOCK *** [ 58.514933][ T5218] [ 58.523071][ T5218] May be due to missing lock nesting notation [ 58.523071][ T5218] [ 58.531392][ T5218] 2 locks held by syz-executor615/5218: [ 58.536953][ T5218] #0: ffff888075f80278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 58.546280][ T5218] #1: ffff888075f80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 58.556474][ T5218] [ 58.556474][ T5218] stack backtrace: [ 58.562383][ T5218] CPU: 0 UID: 0 PID: 5218 Comm: syz-executor615 Not tainted 6.12.0-rc2-syzkaller-00291-g09f6b0c8904b #0 [ 58.573493][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 58.583554][ T5218] Call Trace: [ 58.586847][ T5218] [ 58.589778][ T5218] dump_stack_lvl+0x241/0x360 [ 58.594468][ T5218] ? __pfx_dump_stack_lvl+0x10/0x10 [ 58.599666][ T5218] ? __pfx__printk+0x10/0x10 [ 58.604255][ T5218] ? lockdep_unlock+0x16a/0x300 [ 58.609128][ T5218] print_deadlock_bug+0x483/0x620 [ 58.614157][ T5218] validate_chain+0x15e2/0x5920 [ 58.619018][ T5218] ? __pfx_validate_chain+0x10/0x10 [ 58.624217][ T5218] ? mark_lock+0x9a/0x360 [ 58.628548][ T5218] ? __lock_acquire+0x1384/0x2050 [ 58.633586][ T5218] ? mark_lock+0x9a/0x360 [ 58.637932][ T5218] ? mark_lock+0x9a/0x360 [ 58.642261][ T5218] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 58.648596][ T5218] __lock_acquire+0x1384/0x2050 [ 58.653461][ T5218] lock_acquire+0x1ed/0x550 [ 58.657976][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 58.663873][ T5218] ? __pfx_lock_acquire+0x10/0x10 [ 58.668914][ T5218] ? __pfx_kfence_guarded_alloc+0x10/0x10 [ 58.674637][ T5218] ? __pfx___might_resched+0x10/0x10 [ 58.679935][ T5218] __mutex_lock+0x136/0xd70 [ 58.684449][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 58.690340][ T5218] ? __kfence_alloc+0x274/0x370 [ 58.695195][ T5218] ? __kmalloc_node_track_caller_noprof+0x395/0x440 [ 58.701791][ T5218] ? bch2_read_superblock_clean+0xd6/0x520 [ 58.707615][ T5218] ? bch2_fs_recovery+0x1f4/0x39c0 [ 58.712735][ T5218] ? bch2_fs_get_tree+0xd68/0x1710 [ 58.717852][ T5218] ? vfs_get_tree+0x90/0x2b0 [ 58.722473][ T5218] ? do_new_mount+0x2be/0xb40 [ 58.727156][ T5218] ? __se_sys_mount+0x2d6/0x3c0 [ 58.732016][ T5218] ? do_syscall_64+0xf3/0x230 [ 58.736694][ T5218] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.742769][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 58.748663][ T5218] ? __pfx___mutex_lock+0x10/0x10 [ 58.753693][ T5218] bch2_replicas_entry_validate+0x2a/0x80 [ 58.759414][ T5218] journal_entry_data_usage_validate+0x2b6/0x690 [ 58.765750][ T5218] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 58.772606][ T5218] ? journal_entry_usage_validate+0xc2/0x360 [ 58.778589][ T5218] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 58.785009][ T5218] ? rcu_is_watching+0x15/0xb0 [ 58.789792][ T5218] ? trace_kmalloc+0x1f/0xd0 [ 58.794382][ T5218] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 58.800971][ T5218] ? kmemdup_noprof+0x45/0x60 [ 58.805655][ T5218] ? bch2_journal_entry_validate+0x6a/0xf0 [ 58.811465][ T5218] bch2_read_superblock_clean+0x207/0x520 [ 58.817188][ T5218] bch2_fs_recovery+0x1f4/0x39c0 [ 58.822131][ T5218] ? mark_lock+0x9a/0x360 [ 58.826462][ T5218] ? __lock_acquire+0x1384/0x2050 [ 58.831495][ T5218] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 58.836888][ T5218] ? mark_lock+0x9a/0x360 [ 58.841219][ T5218] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 58.847226][ T5218] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 58.853562][ T5218] ? irqentry_exit+0x63/0x90 [ 58.858154][ T5218] ? lockdep_hardirqs_on+0x99/0x150 [ 58.863365][ T5218] ? bch2_fs_start+0x32f/0x5b0 [ 58.868133][ T5218] ? bch2_fs_start+0x34e/0x5b0 [ 58.872901][ T5218] bch2_fs_start+0x356/0x5b0 [ 58.877498][ T5218] bch2_fs_get_tree+0xd68/0x1710 [ 58.882450][ T5218] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 58.887832][ T5218] ? generic_parse_monolithic+0x387/0x400 [ 58.893564][ T5218] ? cap_capable+0x1b4/0x250 [ 58.898157][ T5218] ? safesetid_security_capable+0xb2/0x1d0 [ 58.903969][ T5218] vfs_get_tree+0x90/0x2b0 [ 58.908492][ T5218] do_new_mount+0x2be/0xb40 [ 58.913009][ T5218] ? __pfx_do_new_mount+0x10/0x10 [ 58.918047][ T5218] __se_sys_mount+0x2d6/0x3c0 [ 58.922734][ T5218] ? __pfx___se_sys_mount+0x10/0x10 [ 58.927937][ T5218] ? do_syscall_64+0x100/0x230 [ 58.932696][ T5218] ? __x64_sys_mount+0x20/0xc0 [ 58.937475][ T5218] do_syscall_64+0xf3/0x230 [ 58.941986][ T5218] ? clear_bhb_loop+0x35/0x90 [ 58.946663][ T5218] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.952581][ T5218] RIP: 0033:0x7f6a5105297a [ 58.956997][ 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 [ 58.976610][ T5218] RSP: 002b:00007fffbfdaf168 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 58.985017][ T5218] RAX: ffffffffffffffda RBX: 00007fffbfdaf180 RCX: 00007f6a5105297a [ 58.992979][ T5218] RDX: 0000000020005b00 RSI: 0000000020005b40 RDI: 00007fffbfdaf180 [ 59.000943][ T5218] RBP: 0000000000000004 R08: 00007fffbfdaf1c0 R09: 0000000000005b29 [ 59.008909][ T5218] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 [ 59.016868][ T5218] R13: 00007fffbfdaf1c0 R14: 0000000000000003 R15: 0000000001000000 [ 59.024836][ T5218]