./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4126130716 <...> Warning: Permanently added '10.128.1.249' (ED25519) to the list of known hosts. execve("./syz-executor4126130716", ["./syz-executor4126130716"], 0x7fffc3f08b10 /* 10 vars */) = 0 brk(NULL) = 0x555558dcd000 brk(0x555558dcdd00) = 0x555558dcdd00 arch_prctl(ARCH_SET_FS, 0x555558dcd380) = 0 set_tid_address(0x555558dcd650) = 5218 set_robust_list(0x555558dcd660, 24) = 0 rseq(0x555558dcdca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4126130716", 4096) = 28 getrandom("\xe0\xe5\xdf\x1a\xd8\xfb\x44\x82", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555558dcdd00 brk(0x555558deed00) = 0x555558deed00 brk(0x555558def000) = 0x555558def000 mprotect(0x7f8e850de000, 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) = 0x7f8e7cc00000 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(0x7f8e7cc00000, 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 [ 54.949966][ T5218] loop0: detected capacity change from 0 to 32768 [ 54.986154][ T5218] ======================================================= [ 54.986154][ T5218] WARNING: The mand mount option has been deprecated and [ 54.986154][ T5218] and is ignored by this kernel. Remove the mand [ 54.986154][ T5218] option from the mount to silence this warning. [ 54.986154][ T5218] ======================================================= [ 55.061995][ T5218] 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 [ 55.080841][ T5218] [ 55.083175][ T5218] ============================================ [ 55.089347][ T5218] WARNING: possible recursive locking detected [ 55.095479][ T5218] 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 Not tainted [ 55.102565][ T5218] -------------------------------------------- [ 55.108706][ T5218] syz-executor412/5218 is trying to acquire lock: [ 55.115129][ T5218] ffff888072500908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 55.125067][ T5218] [ 55.125067][ T5218] but task is already holding lock: [ 55.132422][ T5218] ffff888072500908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 55.142170][ T5218] [ 55.142170][ T5218] other info that might help us debug this: [ 55.150237][ T5218] Possible unsafe locking scenario: [ 55.150237][ T5218] [ 55.157684][ T5218] CPU0 [ 55.160954][ T5218] ---- [ 55.164225][ T5218] lock(&c->sb_lock); [ 55.168288][ T5218] lock(&c->sb_lock); [ 55.172349][ T5218] [ 55.172349][ T5218] *** DEADLOCK *** [ 55.172349][ T5218] [ 55.180481][ T5218] May be due to missing lock nesting notation [ 55.180481][ T5218] [ 55.188807][ T5218] 2 locks held by syz-executor412/5218: [ 55.194342][ T5218] #0: ffff888072500278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 55.203658][ T5218] #1: ffff888072500908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 55.213834][ T5218] [ 55.213834][ T5218] stack backtrace: [ 55.219724][ T5218] CPU: 1 UID: 0 PID: 5218 Comm: syz-executor412 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 [ 55.230826][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 55.240882][ T5218] Call Trace: [ 55.244153][ T5218] [ 55.247075][ T5218] dump_stack_lvl+0x241/0x360 [ 55.251775][ T5218] ? __pfx_dump_stack_lvl+0x10/0x10 [ 55.256965][ T5218] ? __pfx__printk+0x10/0x10 [ 55.261550][ T5218] ? lockdep_unlock+0x16a/0x300 [ 55.266398][ T5218] print_deadlock_bug+0x483/0x620 [ 55.271417][ T5218] validate_chain+0x15e2/0x5920 [ 55.276262][ T5218] ? __pfx___bfs+0x10/0x10 [ 55.280672][ T5218] ? __pfx_validate_chain+0x10/0x10 [ 55.285866][ T5218] ? mark_lock+0x9a/0x360 [ 55.290187][ T5218] ? __lock_acquire+0x1384/0x2050 [ 55.295299][ T5218] ? mark_lock+0x9a/0x360 [ 55.299616][ T5218] __lock_acquire+0x1384/0x2050 [ 55.304466][ T5218] lock_acquire+0x1ed/0x550 [ 55.308962][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 55.314851][ T5218] ? __pfx_lock_acquire+0x10/0x10 [ 55.319875][ T5218] ? lockdep_hardirqs_on+0x99/0x150 [ 55.325070][ T5218] ? __pfx___might_resched+0x10/0x10 [ 55.330352][ T5218] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 55.336247][ T5218] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 55.342575][ T5218] ? stack_trace_save+0x118/0x1d0 [ 55.347600][ T5218] __mutex_lock+0x136/0xd70 [ 55.352095][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 55.357983][ T5218] ? kasan_save_track+0x51/0x80 [ 55.362918][ T5218] ? kasan_save_track+0x3f/0x80 [ 55.367762][ T5218] ? __kasan_kmalloc+0x98/0xb0 [ 55.372526][ T5218] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 55.379132][ T5218] ? kmemdup_noprof+0x2a/0x60 [ 55.383894][ T5218] ? bch2_read_superblock_clean+0xd6/0x520 [ 55.389693][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 55.395578][ T5218] ? bch2_fs_start+0x356/0x5b0 [ 55.400332][ T5218] ? __pfx___mutex_lock+0x10/0x10 [ 55.405346][ T5218] ? do_syscall_64+0xf3/0x230 [ 55.410020][ T5218] bch2_replicas_entry_validate+0x2a/0x80 [ 55.415732][ T5218] journal_entry_data_usage_validate+0x2b6/0x690 [ 55.422053][ T5218] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 55.428893][ T5218] ? journal_entry_usage_validate+0xc2/0x360 [ 55.434866][ T5218] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 55.441272][ T5218] ? rcu_is_watching+0x15/0xb0 [ 55.446028][ T5218] ? trace_kmalloc+0x1f/0xd0 [ 55.450609][ T5218] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 55.457186][ T5218] ? kmemdup_noprof+0x45/0x60 [ 55.461856][ T5218] ? bch2_journal_entry_validate+0x6a/0xf0 [ 55.467657][ T5218] bch2_read_superblock_clean+0x207/0x520 [ 55.473460][ T5218] bch2_fs_recovery+0x1f4/0x39c0 [ 55.478407][ T5218] ? mark_lock+0x9a/0x360 [ 55.482730][ T5218] ? __lock_acquire+0x1384/0x2050 [ 55.487754][ T5218] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 55.493128][ T5218] ? __pfx_lock_release+0x10/0x10 [ 55.498155][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 55.503869][ T5218] ? __pfx_lock_release+0x10/0x10 [ 55.508892][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 55.514606][ T5218] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 55.520322][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 55.525949][ T5218] ? llist_reverse_order+0x72/0x90 [ 55.531058][ T5218] bch2_fs_start+0x356/0x5b0 [ 55.535642][ T5218] bch2_fs_get_tree+0xd68/0x1710 [ 55.540583][ T5218] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 55.545944][ T5218] ? smack_fs_context_parse_param+0xff/0x170 [ 55.551925][ T5218] ? generic_parse_monolithic+0x387/0x400 [ 55.557644][ T5218] ? cap_capable+0x1b4/0x250 [ 55.562224][ T5218] ? safesetid_security_capable+0xb2/0x1d0 [ 55.568021][ T5218] vfs_get_tree+0x90/0x2b0 [ 55.572431][ T5218] do_new_mount+0x2be/0xb40 [ 55.576928][ T5218] ? __pfx_do_new_mount+0x10/0x10 [ 55.581947][ T5218] __se_sys_mount+0x2d6/0x3c0 [ 55.586619][ T5218] ? __pfx___se_sys_mount+0x10/0x10 [ 55.591812][ T5218] ? do_syscall_64+0x100/0x230 [ 55.596568][ T5218] ? __x64_sys_mount+0x20/0xc0 [ 55.601325][ T5218] do_syscall_64+0xf3/0x230 [ 55.605842][ T5218] ? clear_bhb_loop+0x35/0x90 [ 55.610524][ T5218] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 55.616430][ T5218] RIP: 0033:0x7f8e85066c3a [ 55.620848][ 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 [ 55.640447][ T5218] RSP: 002b:00007ffeda230cd8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 55.648883][ T5218] RAX: ffffffffffffffda RBX: 00007ffeda230cf0 RCX: 00007f8e85066c3a [ 55.656845][ T5218] RDX: 0000000020000000 RSI: 0000000020000240 RDI: 00007ffeda230cf0 [ 55.664829][ T5218] RBP: 0000000000000004 R08: 00007ffeda230d30 R09: 0000000000005daf [ 55.672811][ T5218] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 55.680787][ T5218] R13: 00007ffeda230d30 R14: 0000000000000003 R15: 0000000001000000 [ 55.688756][ T5218]