./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2046631753 <...> Warning: Permanently added '10.128.1.214' (ED25519) to the list of known hosts. execve("./syz-executor2046631753", ["./syz-executor2046631753"], 0x7ffdf1f45340 /* 10 vars */) = 0 brk(NULL) = 0x555591823000 brk(0x555591823d00) = 0x555591823d00 arch_prctl(ARCH_SET_FS, 0x555591823380) = 0 set_tid_address(0x555591823650) = 5218 set_robust_list(0x555591823660, 24) = 0 rseq(0x555591823ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2046631753", 4096) = 28 getrandom("\xb0\xdf\x6e\x80\xd8\x27\xf6\x61", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555591823d00 brk(0x555591844d00) = 0x555591844d00 brk(0x555591845000) = 0x555591845000 mprotect(0x7f468c15a000, 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) = 0x7f4683c00000 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(0x7f4683c00000, 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 [ 67.426098][ T5218] loop0: detected capacity change from 0 to 32768 [ 67.514519][ T5218] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=compression=lz4,nojournal_transaction_names [ 67.526167][ T5218] [ 67.528495][ T5218] ============================================ [ 67.534631][ T5218] WARNING: possible recursive locking detected [ 67.540769][ T5218] 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 Not tainted [ 67.547862][ T5218] -------------------------------------------- [ 67.553998][ T5218] syz-executor204/5218 is trying to acquire lock: [ 67.560394][ T5218] ffff888074b80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 67.570250][ T5218] [ 67.570250][ T5218] but task is already holding lock: [ 67.577600][ T5218] ffff888074b80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 67.587352][ T5218] [ 67.587352][ T5218] other info that might help us debug this: [ 67.595406][ T5218] Possible unsafe locking scenario: [ 67.595406][ T5218] [ 67.602838][ T5218] CPU0 [ 67.606110][ T5218] ---- [ 67.609370][ T5218] lock(&c->sb_lock); [ 67.613430][ T5218] lock(&c->sb_lock); [ 67.617491][ T5218] [ 67.617491][ T5218] *** DEADLOCK *** [ 67.617491][ T5218] [ 67.625628][ T5218] May be due to missing lock nesting notation [ 67.625628][ T5218] [ 67.633932][ T5218] 2 locks held by syz-executor204/5218: [ 67.639461][ T5218] #0: ffff888074b80278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 67.648776][ T5218] #1: ffff888074b80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 67.658944][ T5218] [ 67.658944][ T5218] stack backtrace: [ 67.664823][ T5218] CPU: 1 UID: 0 PID: 5218 Comm: syz-executor204 Not tainted 6.12.0-rc1-syzkaller-00046-g7ec462100ef9 #0 [ 67.675914][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 67.685975][ T5218] Call Trace: [ 67.689239][ T5218] [ 67.692158][ T5218] dump_stack_lvl+0x241/0x360 [ 67.696835][ T5218] ? __pfx_dump_stack_lvl+0x10/0x10 [ 67.702017][ T5218] ? __pfx__printk+0x10/0x10 [ 67.706616][ T5218] ? lockdep_unlock+0x16a/0x300 [ 67.711462][ T5218] print_deadlock_bug+0x483/0x620 [ 67.716488][ T5218] validate_chain+0x15e2/0x5920 [ 67.721334][ T5218] ? __pfx___bfs+0x10/0x10 [ 67.725755][ T5218] ? __pfx_validate_chain+0x10/0x10 [ 67.730969][ T5218] ? mark_lock+0x9a/0x360 [ 67.735289][ T5218] ? __lock_acquire+0x1384/0x2050 [ 67.740308][ T5218] ? mark_lock+0x9a/0x360 [ 67.744624][ T5218] __lock_acquire+0x1384/0x2050 [ 67.749476][ T5218] lock_acquire+0x1ed/0x550 [ 67.754000][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 67.759887][ T5218] ? __pfx_lock_acquire+0x10/0x10 [ 67.764917][ T5218] ? lockdep_hardirqs_on+0x99/0x150 [ 67.770115][ T5218] ? __pfx___might_resched+0x10/0x10 [ 67.775393][ T5218] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 67.781280][ T5218] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 67.787607][ T5218] ? stack_trace_save+0x118/0x1d0 [ 67.792628][ T5218] __mutex_lock+0x136/0xd70 [ 67.797116][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 67.803007][ T5218] ? kasan_save_track+0x51/0x80 [ 67.807850][ T5218] ? kasan_save_track+0x3f/0x80 [ 67.812688][ T5218] ? __kasan_kmalloc+0x98/0xb0 [ 67.817446][ T5218] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 67.824028][ T5218] ? kmemdup_noprof+0x2a/0x60 [ 67.828699][ T5218] ? bch2_read_superblock_clean+0xd6/0x520 [ 67.834533][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 67.840417][ T5218] ? bch2_fs_start+0x356/0x5b0 [ 67.845183][ T5218] ? __pfx___mutex_lock+0x10/0x10 [ 67.850197][ T5218] ? do_syscall_64+0xf3/0x230 [ 67.854878][ T5218] bch2_replicas_entry_validate+0x2a/0x80 [ 67.860675][ T5218] journal_entry_data_usage_validate+0x2b6/0x690 [ 67.866997][ T5218] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 67.873845][ T5218] ? journal_entry_usage_validate+0xc2/0x360 [ 67.879835][ T5218] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 67.886240][ T5218] ? rcu_is_watching+0x15/0xb0 [ 67.890994][ T5218] ? trace_kmalloc+0x1f/0xd0 [ 67.895585][ T5218] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 67.902160][ T5218] ? kmemdup_noprof+0x45/0x60 [ 67.906821][ T5218] ? bch2_journal_entry_validate+0x6a/0xf0 [ 67.912624][ T5218] bch2_read_superblock_clean+0x207/0x520 [ 67.918345][ T5218] bch2_fs_recovery+0x1f4/0x39c0 [ 67.923282][ T5218] ? mark_lock+0x9a/0x360 [ 67.927615][ T5218] ? __lock_acquire+0x1384/0x2050 [ 67.932641][ T5218] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 67.938011][ T5218] ? __pfx_lock_release+0x10/0x10 [ 67.943032][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 67.948677][ T5218] ? __pfx_lock_release+0x10/0x10 [ 67.953701][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 67.959339][ T5218] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 67.965049][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 67.970670][ T5218] ? llist_reverse_order+0x72/0x90 [ 67.975780][ T5218] bch2_fs_start+0x356/0x5b0 [ 67.980361][ T5218] bch2_fs_get_tree+0xd68/0x1710 [ 67.985309][ T5218] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 67.990675][ T5218] ? generic_parse_monolithic+0x387/0x400 [ 67.996386][ T5218] ? __pfx_vfs_parse_fs_string+0x10/0x10 [ 68.002022][ T5218] ? cap_capable+0x1b4/0x250 [ 68.006597][ T5218] ? safesetid_security_capable+0xb2/0x1d0 [ 68.012388][ T5218] vfs_get_tree+0x90/0x2b0 [ 68.016795][ T5218] do_new_mount+0x2be/0xb40 [ 68.021299][ T5218] ? __pfx_do_new_mount+0x10/0x10 [ 68.026315][ T5218] __se_sys_mount+0x2d6/0x3c0 [ 68.030983][ T5218] ? __pfx___se_sys_mount+0x10/0x10 [ 68.036172][ T5218] ? do_syscall_64+0x100/0x230 [ 68.040919][ T5218] ? __x64_sys_mount+0x20/0xc0 [ 68.045671][ T5218] do_syscall_64+0xf3/0x230 [ 68.050157][ T5218] ? clear_bhb_loop+0x35/0x90 [ 68.054830][ T5218] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 68.060725][ T5218] RIP: 0033:0x7f468c0e2bba [ 68.065129][ 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 [ 68.084737][ T5218] RSP: 002b:00007ffe7c2d0508 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 68.093138][ T5218] RAX: ffffffffffffffda RBX: 00007ffe7c2d0520 RCX: 00007f468c0e2bba [ 68.101292][ T5218] RDX: 0000000020005d80 RSI: 0000000020000100 RDI: 00007ffe7c2d0520 [ 68.109260][ T5218] RBP: 0000000000000004 R08: 00007ffe7c2d0560 R09: 0000000000005d99 [ 68.117215][ T5218] R10: 0000000003000400 R11: 0000000000000282 R12: 0000000003000400 [ 68.125171][ T5218] R13: 00007ffe7c2d0560 R14: 0000000000000003 R15: 0000000001000000 [ 68.133146][ T5218]