./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1496896390 <...> Warning: Permanently added '10.128.0.127' (ED25519) to the list of known hosts. execve("./syz-executor1496896390", ["./syz-executor1496896390"], 0x7ffe3bfa37e0 /* 10 vars */) = 0 brk(NULL) = 0x55556f2ce000 brk(0x55556f2ced00) = 0x55556f2ced00 arch_prctl(ARCH_SET_FS, 0x55556f2ce380) = 0 set_tid_address(0x55556f2ce650) = 5220 set_robust_list(0x55556f2ce660, 24) = 0 rseq(0x55556f2ceca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1496896390", 4096) = 28 getrandom("\xf6\x90\x4c\xd7\x97\xad\x4a\xd3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556f2ced00 brk(0x55556f2efd00) = 0x55556f2efd00 brk(0x55556f2f0000) = 0x55556f2f0000 mprotect(0x7f89afec0000, 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) = 0x7f89a7a00000 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(0x7f89a7a00000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file7", 0777) = 0 [ 55.316963][ T5220] loop0: detected capacity change from 0 to 32768 [ 55.359236][ T5220] ======================================================= [ 55.359236][ T5220] WARNING: The mand mount option has been deprecated and [ 55.359236][ T5220] and is ignored by this kernel. Remove the mand [ 55.359236][ T5220] option from the mount to silence this warning. [ 55.359236][ T5220] ======================================================= [ 55.462779][ T5220] 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 [ 55.481538][ T5220] [ 55.483852][ T5220] ============================================ [ 55.489976][ T5220] WARNING: possible recursive locking detected [ 55.496103][ T5220] 6.12.0-rc2-syzkaller-00205-g1d227fcc7222 #0 Not tainted [ 55.503193][ T5220] -------------------------------------------- [ 55.509318][ T5220] syz-executor149/5220 is trying to acquire lock: [ 55.515760][ T5220] ffff888079080908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 55.525585][ T5220] [ 55.525585][ T5220] but task is already holding lock: [ 55.532940][ T5220] ffff888079080908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 55.542687][ T5220] [ 55.542687][ T5220] other info that might help us debug this: [ 55.550731][ T5220] Possible unsafe locking scenario: [ 55.550731][ T5220] [ 55.558165][ T5220] CPU0 [ 55.561428][ T5220] ---- [ 55.564690][ T5220] lock(&c->sb_lock); [ 55.568747][ T5220] lock(&c->sb_lock); [ 55.572805][ T5220] [ 55.572805][ T5220] *** DEADLOCK *** [ 55.572805][ T5220] [ 55.580944][ T5220] May be due to missing lock nesting notation [ 55.580944][ T5220] [ 55.589253][ T5220] 2 locks held by syz-executor149/5220: [ 55.594785][ T5220] #0: ffff888079080278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 55.604102][ T5220] #1: ffff888079080908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 55.614281][ T5220] [ 55.614281][ T5220] stack backtrace: [ 55.620164][ T5220] CPU: 1 UID: 0 PID: 5220 Comm: syz-executor149 Not tainted 6.12.0-rc2-syzkaller-00205-g1d227fcc7222 #0 [ 55.631260][ T5220] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 55.641305][ T5220] Call Trace: [ 55.644581][ T5220] [ 55.647506][ T5220] dump_stack_lvl+0x241/0x360 [ 55.652180][ T5220] ? __pfx_dump_stack_lvl+0x10/0x10 [ 55.657364][ T5220] ? __pfx__printk+0x10/0x10 [ 55.661956][ T5220] ? lockdep_unlock+0x16a/0x300 [ 55.666921][ T5220] print_deadlock_bug+0x483/0x620 [ 55.671935][ T5220] validate_chain+0x15e2/0x5920 [ 55.676779][ T5220] ? __pfx___bfs+0x10/0x10 [ 55.681183][ T5220] ? __pfx_validate_chain+0x10/0x10 [ 55.686374][ T5220] ? mark_lock+0x9a/0x360 [ 55.690690][ T5220] ? __lock_acquire+0x1384/0x2050 [ 55.695711][ T5220] ? mark_lock+0x9a/0x360 [ 55.700028][ T5220] __lock_acquire+0x1384/0x2050 [ 55.704876][ T5220] lock_acquire+0x1ed/0x550 [ 55.709409][ T5220] ? bch2_replicas_entry_validate+0x2a/0x80 [ 55.715292][ T5220] ? __pfx_lock_acquire+0x10/0x10 [ 55.720308][ T5220] ? lockdep_hardirqs_on+0x99/0x150 [ 55.725528][ T5220] ? __pfx___might_resched+0x10/0x10 [ 55.730813][ T5220] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 55.736697][ T5220] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 55.743016][ T5220] ? stack_trace_save+0x118/0x1d0 [ 55.748032][ T5220] __mutex_lock+0x136/0xd70 [ 55.752523][ T5220] ? bch2_replicas_entry_validate+0x2a/0x80 [ 55.758424][ T5220] ? kasan_save_track+0x51/0x80 [ 55.763269][ T5220] ? kasan_save_track+0x3f/0x80 [ 55.768107][ T5220] ? __kasan_kmalloc+0x98/0xb0 [ 55.772859][ T5220] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 55.779433][ T5220] ? kmemdup_noprof+0x2a/0x60 [ 55.784101][ T5220] ? bch2_read_superblock_clean+0xd6/0x520 [ 55.789894][ T5220] ? bch2_replicas_entry_validate+0x2a/0x80 [ 55.795772][ T5220] ? bch2_fs_start+0x356/0x5b0 [ 55.800524][ T5220] ? __pfx___mutex_lock+0x10/0x10 [ 55.805533][ T5220] ? do_syscall_64+0xf3/0x230 [ 55.810201][ T5220] bch2_replicas_entry_validate+0x2a/0x80 [ 55.815910][ T5220] journal_entry_data_usage_validate+0x2b6/0x690 [ 55.822231][ T5220] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 55.829069][ T5220] ? journal_entry_usage_validate+0xc2/0x360 [ 55.835037][ T5220] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 55.841436][ T5220] ? rcu_is_watching+0x15/0xb0 [ 55.846229][ T5220] ? trace_kmalloc+0x1f/0xd0 [ 55.850816][ T5220] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 55.857396][ T5220] ? kmemdup_noprof+0x45/0x60 [ 55.862069][ T5220] ? bch2_journal_entry_validate+0x6a/0xf0 [ 55.867867][ T5220] bch2_read_superblock_clean+0x207/0x520 [ 55.873581][ T5220] bch2_fs_recovery+0x1f4/0x39c0 [ 55.878513][ T5220] ? mark_lock+0x9a/0x360 [ 55.882856][ T5220] ? __lock_acquire+0x1384/0x2050 [ 55.887881][ T5220] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 55.893255][ T5220] ? __pfx_lock_release+0x10/0x10 [ 55.898275][ T5220] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 55.903906][ T5220] ? __pfx_lock_release+0x10/0x10 [ 55.908927][ T5220] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 55.914552][ T5220] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 55.920263][ T5220] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 55.925888][ T5220] ? llist_reverse_order+0x72/0x90 [ 55.930985][ T5220] bch2_fs_start+0x356/0x5b0 [ 55.935570][ T5220] bch2_fs_get_tree+0xd68/0x1710 [ 55.940507][ T5220] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 55.945867][ T5220] ? smack_fs_context_parse_param+0xff/0x170 [ 55.951847][ T5220] ? generic_parse_monolithic+0x387/0x400 [ 55.957561][ T5220] ? cap_capable+0x1b4/0x250 [ 55.962142][ T5220] ? safesetid_security_capable+0xb2/0x1d0 [ 55.967936][ T5220] vfs_get_tree+0x90/0x2b0 [ 55.972343][ T5220] do_new_mount+0x2be/0xb40 [ 55.976848][ T5220] ? __pfx_do_new_mount+0x10/0x10 [ 55.981866][ T5220] __se_sys_mount+0x2d6/0x3c0 [ 55.986537][ T5220] ? __pfx___se_sys_mount+0x10/0x10 [ 55.991724][ T5220] ? do_syscall_64+0x100/0x230 [ 55.996478][ T5220] ? __x64_sys_mount+0x20/0xc0 [ 56.001236][ T5220] do_syscall_64+0xf3/0x230 [ 56.005732][ T5220] ? clear_bhb_loop+0x35/0x90 [ 56.010394][ T5220] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 56.016292][ T5220] RIP: 0033:0x7f89afe48c3a [ 56.020700][ 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 [ 56.040294][ T5220] RSP: 002b:00007ffc5194f148 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 56.048715][ T5220] RAX: ffffffffffffffda RBX: 00007ffc5194f160 RCX: 00007f89afe48c3a [ 56.056715][ T5220] RDX: 0000000020005d80 RSI: 0000000020000080 RDI: 00007ffc5194f160 [ 56.064676][ T5220] RBP: 0000000000000004 R08: 00007ffc5194f1a0 R09: 0000000000005e07 [ 56.072636][ T5220] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 56.080592][ T5220] R13: 00007ffc5194f1a0 R14: 0000000000000003 R15: 0000000001000000 [ 56.088559][ T5220]