./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1483960905 <...> Warning: Permanently added '10.128.0.170' (ED25519) to the list of known hosts. execve("./syz-executor1483960905", ["./syz-executor1483960905"], 0x7ffcbcf36ba0 /* 10 vars */) = 0 brk(NULL) = 0x55558a0c8000 brk(0x55558a0c8d00) = 0x55558a0c8d00 arch_prctl(ARCH_SET_FS, 0x55558a0c8380) = 0 set_tid_address(0x55558a0c8650) = 5217 set_robust_list(0x55558a0c8660, 24) = 0 rseq(0x55558a0c8ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1483960905", 4096) = 28 getrandom("\xe2\x84\xf6\xfb\xcb\x08\xe2\xab", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558a0c8d00 brk(0x55558a0e9d00) = 0x55558a0e9d00 brk(0x55558a0ea000) = 0x55558a0ea000 mprotect(0x7fc28cf3e000, 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) = 0x7fc284a00000 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(0x7fc284a00000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file1", 0777) = 0 syzkaller login: [ 60.800920][ T5217] loop0: detected capacity change from 0 to 32768 [ 60.837267][ T5217] ======================================================= [ 60.837267][ T5217] WARNING: The mand mount option has been deprecated and [ 60.837267][ T5217] and is ignored by this kernel. Remove the mand [ 60.837267][ T5217] option from the mount to silence this warning. [ 60.837267][ T5217] ======================================================= [ 60.903678][ T5217] 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 [ 60.923284][ T5217] [ 60.925612][ T5217] ============================================ [ 60.931750][ T5217] WARNING: possible recursive locking detected [ 60.937897][ T5217] 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 Not tainted [ 60.944985][ T5217] -------------------------------------------- [ 60.951134][ T5217] syz-executor148/5217 is trying to acquire lock: [ 60.957532][ T5217] ffff888076580908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 60.967382][ T5217] [ 60.967382][ T5217] but task is already holding lock: [ 60.974736][ T5217] ffff888076580908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 60.984483][ T5217] [ 60.984483][ T5217] other info that might help us debug this: [ 60.992527][ T5217] Possible unsafe locking scenario: [ 60.992527][ T5217] [ 60.999975][ T5217] CPU0 [ 61.003241][ T5217] ---- [ 61.006521][ T5217] lock(&c->sb_lock); [ 61.010580][ T5217] lock(&c->sb_lock); [ 61.014639][ T5217] [ 61.014639][ T5217] *** DEADLOCK *** [ 61.014639][ T5217] [ 61.022761][ T5217] May be due to missing lock nesting notation [ 61.022761][ T5217] [ 61.031066][ T5217] 2 locks held by syz-executor148/5217: [ 61.036605][ T5217] #0: ffff888076580278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 61.045921][ T5217] #1: ffff888076580908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 61.056098][ T5217] [ 61.056098][ T5217] stack backtrace: [ 61.061989][ T5217] CPU: 0 UID: 0 PID: 5217 Comm: syz-executor148 Not tainted 6.12.0-rc1-syzkaller-00031-ge32cde8d2bd7 #0 [ 61.073098][ T5217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 61.083178][ T5217] Call Trace: [ 61.086454][ T5217] [ 61.089383][ T5217] dump_stack_lvl+0x241/0x360 [ 61.094078][ T5217] ? __pfx_dump_stack_lvl+0x10/0x10 [ 61.099267][ T5217] ? __pfx__printk+0x10/0x10 [ 61.103848][ T5217] ? lockdep_unlock+0x16a/0x300 [ 61.108703][ T5217] print_deadlock_bug+0x483/0x620 [ 61.113734][ T5217] validate_chain+0x15e2/0x5920 [ 61.118587][ T5217] ? __pfx___bfs+0x10/0x10 [ 61.123014][ T5217] ? __pfx_validate_chain+0x10/0x10 [ 61.128215][ T5217] ? mark_lock+0x9a/0x360 [ 61.132555][ T5217] ? __lock_acquire+0x1384/0x2050 [ 61.137607][ T5217] ? mark_lock+0x9a/0x360 [ 61.141956][ T5217] __lock_acquire+0x1384/0x2050 [ 61.146848][ T5217] lock_acquire+0x1ed/0x550 [ 61.151376][ T5217] ? bch2_replicas_entry_validate+0x2a/0x80 [ 61.157363][ T5217] ? __pfx_lock_acquire+0x10/0x10 [ 61.162416][ T5217] ? lockdep_hardirqs_on+0x99/0x150 [ 61.167651][ T5217] ? __pfx___might_resched+0x10/0x10 [ 61.172940][ T5217] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 61.178839][ T5217] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 61.185168][ T5217] ? stack_trace_save+0x118/0x1d0 [ 61.190192][ T5217] __mutex_lock+0x136/0xd70 [ 61.194687][ T5217] ? bch2_replicas_entry_validate+0x2a/0x80 [ 61.200600][ T5217] ? kasan_save_track+0x51/0x80 [ 61.205455][ T5217] ? kasan_save_track+0x3f/0x80 [ 61.210323][ T5217] ? __kasan_kmalloc+0x98/0xb0 [ 61.215087][ T5217] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 61.221682][ T5217] ? kmemdup_noprof+0x2a/0x60 [ 61.226381][ T5217] ? bch2_read_superblock_clean+0xd6/0x520 [ 61.232272][ T5217] ? bch2_replicas_entry_validate+0x2a/0x80 [ 61.238175][ T5217] ? bch2_fs_start+0x356/0x5b0 [ 61.242935][ T5217] ? __pfx___mutex_lock+0x10/0x10 [ 61.247954][ T5217] ? do_syscall_64+0xf3/0x230 [ 61.252638][ T5217] bch2_replicas_entry_validate+0x2a/0x80 [ 61.258356][ T5217] journal_entry_data_usage_validate+0x2b6/0x690 [ 61.264681][ T5217] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 61.271540][ T5217] ? journal_entry_usage_validate+0xc2/0x360 [ 61.277523][ T5217] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 61.283945][ T5217] ? rcu_is_watching+0x15/0xb0 [ 61.288710][ T5217] ? trace_kmalloc+0x1f/0xd0 [ 61.293301][ T5217] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 61.299899][ T5217] ? kmemdup_noprof+0x45/0x60 [ 61.304583][ T5217] ? bch2_journal_entry_validate+0x6a/0xf0 [ 61.310390][ T5217] bch2_read_superblock_clean+0x207/0x520 [ 61.316118][ T5217] bch2_fs_recovery+0x1f4/0x39c0 [ 61.321064][ T5217] ? mark_lock+0x9a/0x360 [ 61.325399][ T5217] ? __lock_acquire+0x1384/0x2050 [ 61.330443][ T5217] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 61.335870][ T5217] ? __pfx_lock_release+0x10/0x10 [ 61.340907][ T5217] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 61.346549][ T5217] ? __pfx_lock_release+0x10/0x10 [ 61.351588][ T5217] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 61.357230][ T5217] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 61.362955][ T5217] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 61.368593][ T5217] ? llist_reverse_order+0x72/0x90 [ 61.373707][ T5217] bch2_fs_start+0x356/0x5b0 [ 61.378303][ T5217] bch2_fs_get_tree+0xd68/0x1710 [ 61.383257][ T5217] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 61.388675][ T5217] ? smack_fs_context_parse_param+0xff/0x170 [ 61.394672][ T5217] ? generic_parse_monolithic+0x387/0x400 [ 61.400420][ T5217] ? cap_capable+0x1b4/0x250 [ 61.405034][ T5217] ? safesetid_security_capable+0xb2/0x1d0 [ 61.410931][ T5217] vfs_get_tree+0x90/0x2b0 [ 61.415357][ T5217] do_new_mount+0x2be/0xb40 [ 61.419884][ T5217] ? __pfx_do_new_mount+0x10/0x10 [ 61.424920][ T5217] __se_sys_mount+0x2d6/0x3c0 [ 61.429624][ T5217] ? __pfx___se_sys_mount+0x10/0x10 [ 61.434833][ T5217] ? do_syscall_64+0x100/0x230 [ 61.439600][ T5217] ? __x64_sys_mount+0x20/0xc0 [ 61.444377][ T5217] do_syscall_64+0xf3/0x230 [ 61.448881][ T5217] ? clear_bhb_loop+0x35/0x90 [ 61.453558][ T5217] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.459477][ T5217] RIP: 0033:0x7fc28cec6c3a [ 61.463900][ T5217] 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 [ 61.483509][ T5217] RSP: 002b:00007ffcb853f008 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 61.491919][ T5217] RAX: ffffffffffffffda RBX: 00007ffcb853f020 RCX: 00007fc28cec6c3a [ 61.499886][ T5217] RDX: 0000000020005d80 RSI: 0000000020000240 RDI: 00007ffcb853f020 [ 61.507859][ T5217] RBP: 0000000000000004 R08: 00007ffcb853f060 R09: 0000000000005daf [ 61.515830][ T5217] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 61.523798][ T5217] R13: 00007ffcb853f060 R14: 0000000000000003 R15: 0000000001000000 [ 61.531775][ T5217]