./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor116275845 <...> Warning: Permanently added '10.128.1.150' (ED25519) to the list of known hosts. execve("./syz-executor116275845", ["./syz-executor116275845"], 0x7ffe4087c760 /* 10 vars */) = 0 brk(NULL) = 0x55555c077000 brk(0x55555c077d00) = 0x55555c077d00 arch_prctl(ARCH_SET_FS, 0x55555c077380) = 0 set_tid_address(0x55555c077650) = 5221 set_robust_list(0x55555c077660, 24) = 0 rseq(0x55555c077ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor116275845", 4096) = 27 getrandom("\xb2\x74\x78\xc9\xd3\xb4\x15\xbe", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555c077d00 brk(0x55555c098d00) = 0x55555c098d00 brk(0x55555c099000) = 0x55555c099000 mprotect(0x7f47b1590000, 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) = 0x7f47a9000000 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(0x7f47a9000000, 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 [ 73.742320][ T5221] loop0: detected capacity change from 0 to 32768 [ 73.776012][ T5221] ======================================================= [ 73.776012][ T5221] WARNING: The mand mount option has been deprecated and [ 73.776012][ T5221] and is ignored by this kernel. Remove the mand [ 73.776012][ T5221] option from the mount to silence this warning. [ 73.776012][ T5221] ======================================================= [ 73.869323][ 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 [ 73.888586][ T5221] [ 73.891098][ T5221] ============================================ [ 73.897360][ T5221] WARNING: possible recursive locking detected [ 73.903561][ T5221] 6.12.0-rc2-syzkaller-00100-geb952c47d154 #0 Not tainted [ 73.910768][ T5221] -------------------------------------------- [ 73.917397][ T5221] syz-executor116/5221 is trying to acquire lock: [ 73.923977][ T5221] ffff888072500908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 73.933953][ T5221] [ 73.933953][ T5221] but task is already holding lock: [ 73.941329][ T5221] ffff888072500908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 73.951107][ T5221] [ 73.951107][ T5221] other info that might help us debug this: [ 73.959197][ T5221] Possible unsafe locking scenario: [ 73.959197][ T5221] [ 73.966729][ T5221] CPU0 [ 73.970119][ T5221] ---- [ 73.973429][ T5221] lock(&c->sb_lock); [ 73.977537][ T5221] lock(&c->sb_lock); [ 73.981621][ T5221] [ 73.981621][ T5221] *** DEADLOCK *** [ 73.981621][ T5221] [ 73.989805][ T5221] May be due to missing lock nesting notation [ 73.989805][ T5221] [ 73.998204][ T5221] 2 locks held by syz-executor116/5221: [ 74.004016][ T5221] #0: ffff888072500278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 74.013372][ T5221] #1: ffff888072500908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 74.023678][ T5221] [ 74.023678][ T5221] stack backtrace: [ 74.029693][ T5221] CPU: 1 UID: 0 PID: 5221 Comm: syz-executor116 Not tainted 6.12.0-rc2-syzkaller-00100-geb952c47d154 #0 [ 74.041343][ T5221] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 74.051431][ T5221] Call Trace: [ 74.054834][ T5221] [ 74.058042][ T5221] dump_stack_lvl+0x241/0x360 [ 74.062886][ T5221] ? __pfx_dump_stack_lvl+0x10/0x10 [ 74.068124][ T5221] ? __pfx__printk+0x10/0x10 [ 74.072767][ T5221] ? lockdep_unlock+0x16a/0x300 [ 74.077802][ T5221] print_deadlock_bug+0x483/0x620 [ 74.082932][ T5221] validate_chain+0x15e2/0x5920 [ 74.087808][ T5221] ? __pfx___bfs+0x10/0x10 [ 74.092455][ T5221] ? __pfx_validate_chain+0x10/0x10 [ 74.098461][ T5221] ? mark_lock+0x9a/0x360 [ 74.103046][ T5221] ? __lock_acquire+0x1384/0x2050 [ 74.108139][ T5221] ? mark_lock+0x9a/0x360 [ 74.112494][ T5221] __lock_acquire+0x1384/0x2050 [ 74.117535][ T5221] lock_acquire+0x1ed/0x550 [ 74.122157][ T5221] ? bch2_replicas_entry_validate+0x2a/0x80 [ 74.128193][ T5221] ? __pfx_lock_acquire+0x10/0x10 [ 74.133439][ T5221] ? lockdep_hardirqs_on+0x99/0x150 [ 74.138749][ T5221] ? __pfx___might_resched+0x10/0x10 [ 74.144156][ T5221] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 74.150074][ T5221] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 74.156518][ T5221] ? stack_trace_save+0x118/0x1d0 [ 74.161646][ T5221] __mutex_lock+0x136/0xd70 [ 74.166237][ T5221] ? bch2_replicas_entry_validate+0x2a/0x80 [ 74.172492][ T5221] ? kasan_save_track+0x51/0x80 [ 74.178153][ T5221] ? kasan_save_track+0x3f/0x80 [ 74.183249][ T5221] ? __kasan_kmalloc+0x98/0xb0 [ 74.188060][ T5221] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 74.194729][ T5221] ? kmemdup_noprof+0x2a/0x60 [ 74.199644][ T5221] ? bch2_read_superblock_clean+0xd6/0x520 [ 74.205480][ T5221] ? bch2_replicas_entry_validate+0x2a/0x80 [ 74.211389][ T5221] ? bch2_fs_start+0x356/0x5b0 [ 74.216177][ T5221] ? __pfx___mutex_lock+0x10/0x10 [ 74.221292][ T5221] ? do_syscall_64+0xf3/0x230 [ 74.226003][ T5221] bch2_replicas_entry_validate+0x2a/0x80 [ 74.231951][ T5221] journal_entry_data_usage_validate+0x2b6/0x690 [ 74.238373][ T5221] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 74.245322][ T5221] ? journal_entry_usage_validate+0xc2/0x360 [ 74.251325][ T5221] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 74.258067][ T5221] ? rcu_is_watching+0x15/0xb0 [ 74.262863][ T5221] ? trace_kmalloc+0x1f/0xd0 [ 74.267668][ T5221] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 74.274280][ T5221] ? kmemdup_noprof+0x45/0x60 [ 74.279424][ T5221] ? bch2_journal_entry_validate+0x6a/0xf0 [ 74.285264][ T5221] bch2_read_superblock_clean+0x207/0x520 [ 74.291123][ T5221] bch2_fs_recovery+0x1f4/0x39c0 [ 74.296119][ T5221] ? mark_lock+0x9a/0x360 [ 74.300469][ T5221] ? __lock_acquire+0x1384/0x2050 [ 74.305558][ T5221] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 74.310956][ T5221] ? __pfx_lock_release+0x10/0x10 [ 74.315999][ T5221] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 74.322165][ T5221] ? __pfx_lock_release+0x10/0x10 [ 74.327237][ T5221] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 74.332979][ T5221] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 74.338714][ T5221] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 74.344361][ T5221] ? llist_reverse_order+0x72/0x90 [ 74.349485][ T5221] bch2_fs_start+0x356/0x5b0 [ 74.354117][ T5221] bch2_fs_get_tree+0xd68/0x1710 [ 74.359126][ T5221] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 74.364531][ T5221] ? generic_parse_monolithic+0x387/0x400 [ 74.370285][ T5221] ? cap_capable+0x1b4/0x250 [ 74.374888][ T5221] ? safesetid_security_capable+0xb2/0x1d0 [ 74.380811][ T5221] vfs_get_tree+0x90/0x2b0 [ 74.385352][ T5221] do_new_mount+0x2be/0xb40 [ 74.389969][ T5221] ? __pfx_do_new_mount+0x10/0x10 [ 74.395045][ T5221] __se_sys_mount+0x2d6/0x3c0 [ 74.399849][ T5221] ? __pfx___se_sys_mount+0x10/0x10 [ 74.405153][ T5221] ? do_syscall_64+0x100/0x230 [ 74.410140][ T5221] ? __x64_sys_mount+0x20/0xc0 [ 74.414939][ T5221] do_syscall_64+0xf3/0x230 [ 74.419468][ T5221] ? clear_bhb_loop+0x35/0x90 [ 74.424275][ T5221] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.430198][ T5221] RIP: 0033:0x7f47b1518bfa [ 74.434720][ 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 [ 74.454648][ T5221] RSP: 002b:00007ffe67f629d8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 74.463103][ T5221] RAX: ffffffffffffffda RBX: 00007ffe67f629f0 RCX: 00007f47b1518bfa [ 74.471081][ T5221] RDX: 0000000020005d80 RSI: 0000000020000240 RDI: 00007ffe67f629f0 [ 74.479055][ T5221] RBP: 0000000000000004 R08: 00007ffe67f62a30 R09: 0000000000005db9 [ 74.487055][ T5221] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 74.495394][ T5221] R13: 00007ffe67f62a30 R14: 0000000000000003 R15: 0000000001000000 [ 74.503398][ T5221]