./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1957891370 <...> Warning: Permanently added '10.128.1.75' (ED25519) to the list of known hosts. execve("./syz-executor1957891370", ["./syz-executor1957891370"], 0x7ffef7ec9b40 /* 10 vars */) = 0 brk(NULL) = 0x55558ec11000 brk(0x55558ec11d00) = 0x55558ec11d00 arch_prctl(ARCH_SET_FS, 0x55558ec11380) = 0 set_tid_address(0x55558ec11650) = 5219 set_robust_list(0x55558ec11660, 24) = 0 rseq(0x55558ec11ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1957891370", 4096) = 28 getrandom("\x09\x0f\x7e\xa1\x31\xd6\x99\xc4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558ec11d00 brk(0x55558ec32d00) = 0x55558ec32d00 brk(0x55558ec33000) = 0x55558ec33000 mprotect(0x7f3d9baca000, 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, 0executing program ) = 0x21000000 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) = 0x7f3d93600000 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(0x7f3d93600000, 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 [ 54.228895][ T5219] loop0: detected capacity change from 0 to 32768 [ 54.293351][ T5219] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names [ 54.310248][ T5219] [ 54.312567][ T5219] ============================================ [ 54.318788][ T5219] WARNING: possible recursive locking detected [ 54.324937][ T5219] 6.12.0-rc2-syzkaller-00305-g7234e2ea0edd #0 Not tainted [ 54.332030][ T5219] -------------------------------------------- [ 54.338159][ T5219] syz-executor195/5219 is trying to acquire lock: [ 54.344550][ T5219] ffff888072280908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 54.354379][ T5219] [ 54.354379][ T5219] but task is already holding lock: [ 54.361718][ T5219] ffff888072280908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 54.371789][ T5219] [ 54.371789][ T5219] other info that might help us debug this: [ 54.379827][ T5219] Possible unsafe locking scenario: [ 54.379827][ T5219] [ 54.387255][ T5219] CPU0 [ 54.390514][ T5219] ---- [ 54.393773][ T5219] lock(&c->sb_lock); [ 54.397824][ T5219] lock(&c->sb_lock); [ 54.401873][ T5219] [ 54.401873][ T5219] *** DEADLOCK *** [ 54.401873][ T5219] [ 54.409991][ T5219] May be due to missing lock nesting notation [ 54.409991][ T5219] [ 54.418311][ T5219] 2 locks held by syz-executor195/5219: [ 54.423832][ T5219] #0: ffff888072280278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 54.433143][ T5219] #1: ffff888072280908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 54.443297][ T5219] [ 54.443297][ T5219] stack backtrace: [ 54.449176][ T5219] CPU: 0 UID: 0 PID: 5219 Comm: syz-executor195 Not tainted 6.12.0-rc2-syzkaller-00305-g7234e2ea0edd #0 [ 54.460272][ T5219] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 54.470313][ T5219] Call Trace: [ 54.473574][ T5219] [ 54.476489][ T5219] dump_stack_lvl+0x241/0x360 [ 54.481162][ T5219] ? __pfx_dump_stack_lvl+0x10/0x10 [ 54.486355][ T5219] ? __pfx__printk+0x10/0x10 [ 54.490937][ T5219] ? lockdep_unlock+0x16a/0x300 [ 54.495781][ T5219] print_deadlock_bug+0x483/0x620 [ 54.500798][ T5219] validate_chain+0x15e2/0x5920 [ 54.505638][ T5219] ? __pfx___bfs+0x10/0x10 [ 54.510045][ T5219] ? __pfx_validate_chain+0x10/0x10 [ 54.515235][ T5219] ? mark_lock+0x9a/0x360 [ 54.519546][ T5219] ? __lock_acquire+0x1384/0x2050 [ 54.524559][ T5219] ? mark_lock+0x9a/0x360 [ 54.528867][ T5219] __lock_acquire+0x1384/0x2050 [ 54.533737][ T5219] lock_acquire+0x1ed/0x550 [ 54.538246][ T5219] ? bch2_replicas_entry_validate+0x2a/0x80 [ 54.544129][ T5219] ? __pfx_lock_acquire+0x10/0x10 [ 54.549141][ T5219] ? lockdep_hardirqs_on+0x99/0x150 [ 54.554328][ T5219] ? __pfx___might_resched+0x10/0x10 [ 54.559600][ T5219] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 54.565484][ T5219] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 54.571799][ T5219] ? stack_trace_save+0x118/0x1d0 [ 54.576826][ T5219] __mutex_lock+0x136/0xd70 [ 54.581311][ T5219] ? bch2_replicas_entry_validate+0x2a/0x80 [ 54.587194][ T5219] ? kasan_save_track+0x51/0x80 [ 54.592031][ T5219] ? kasan_save_track+0x3f/0x80 [ 54.596877][ T5219] ? __kasan_kmalloc+0x98/0xb0 [ 54.601643][ T5219] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 54.608241][ T5219] ? kmemdup_noprof+0x2a/0x60 [ 54.612907][ T5219] ? bch2_read_superblock_clean+0xd6/0x520 [ 54.618717][ T5219] ? bch2_replicas_entry_validate+0x2a/0x80 [ 54.624605][ T5219] ? bch2_fs_start+0x356/0x5b0 [ 54.629379][ T5219] ? __pfx___mutex_lock+0x10/0x10 [ 54.634409][ T5219] ? do_syscall_64+0xf3/0x230 [ 54.639077][ T5219] bch2_replicas_entry_validate+0x2a/0x80 [ 54.644781][ T5219] journal_entry_data_usage_validate+0x2b6/0x690 [ 54.651122][ T5219] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 54.657954][ T5219] ? journal_entry_usage_validate+0xc2/0x360 [ 54.663927][ T5219] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 54.670337][ T5219] ? rcu_is_watching+0x15/0xb0 [ 54.675087][ T5219] ? trace_kmalloc+0x1f/0xd0 [ 54.679675][ T5219] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 54.686256][ T5219] ? kmemdup_noprof+0x45/0x60 [ 54.690917][ T5219] ? bch2_journal_entry_validate+0x6a/0xf0 [ 54.696709][ T5219] bch2_read_superblock_clean+0x207/0x520 [ 54.702414][ T5219] bch2_fs_recovery+0x1f4/0x39c0 [ 54.707340][ T5219] ? mark_lock+0x9a/0x360 [ 54.711704][ T5219] ? __lock_acquire+0x1384/0x2050 [ 54.716739][ T5219] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 54.722111][ T5219] ? __pfx_lock_release+0x10/0x10 [ 54.727126][ T5219] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 54.732773][ T5219] ? __pfx_lock_release+0x10/0x10 [ 54.737892][ T5219] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 54.743535][ T5219] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 54.749249][ T5219] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 54.754872][ T5219] ? llist_reverse_order+0x72/0x90 [ 54.759969][ T5219] bch2_fs_start+0x356/0x5b0 [ 54.764548][ T5219] bch2_fs_get_tree+0xd68/0x1710 [ 54.769477][ T5219] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 54.774855][ T5219] ? generic_parse_monolithic+0x387/0x400 [ 54.780564][ T5219] ? cap_capable+0x1b4/0x250 [ 54.785133][ T5219] ? safesetid_security_capable+0xb2/0x1d0 [ 54.790933][ T5219] vfs_get_tree+0x90/0x2b0 [ 54.795333][ T5219] do_new_mount+0x2be/0xb40 [ 54.799991][ T5219] ? __pfx_do_new_mount+0x10/0x10 [ 54.805002][ T5219] __se_sys_mount+0x2d6/0x3c0 [ 54.809708][ T5219] ? __pfx___se_sys_mount+0x10/0x10 [ 54.814913][ T5219] ? do_syscall_64+0x100/0x230 [ 54.819660][ T5219] ? __x64_sys_mount+0x20/0xc0 [ 54.824406][ T5219] do_syscall_64+0xf3/0x230 [ 54.828891][ T5219] ? clear_bhb_loop+0x35/0x90 [ 54.833549][ T5219] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 54.839437][ T5219] RIP: 0033:0x7f3d9ba5293a [ 54.843836][ T5219] 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 [ 54.863436][ T5219] RSP: 002b:00007ffea1c22d48 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 54.871953][ T5219] RAX: ffffffffffffffda RBX: 00007ffea1c22d60 RCX: 00007f3d9ba5293a [ 54.879914][ T5219] RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007ffea1c22d60 [ 54.887868][ T5219] RBP: 0000000000000004 R08: 00007ffea1c22da0 R09: 00000000000058ff [ 54.895823][ T5219] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 [ 54.903786][ T5219] R13: 00007ffea1c22da0 R14: 0000000000000003 R15: 0000000001000000 [ 54.911746][ T5219]