./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3844650763 <...> Warning: Permanently added '10.128.0.204' (ED25519) to the list of known hosts. execve("./syz-executor3844650763", ["./syz-executor3844650763"], 0x7fff0cc0a620 /* 10 vars */) = 0 brk(NULL) = 0x555555f1d000 brk(0x555555f1dd00) = 0x555555f1dd00 arch_prctl(ARCH_SET_FS, 0x555555f1d380) = 0 set_tid_address(0x555555f1d650) = 5218 set_robust_list(0x555555f1d660, 24) = 0 rseq(0x555555f1dca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3844650763", 4096) = 28 getrandom("\xa1\xb3\x89\x9f\x2b\xbb\x70\xc4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555f1dd00 brk(0x555555f3ed00) = 0x555555f3ed00 brk(0x555555f3f000) = 0x555555f3f000 mprotect(0x7fb545bc3000, 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 write(1, "executing program\n", 18executing program ) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fb53d600000 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(0x7fb53d600000, 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 [ 57.166144][ T5218] loop0: detected capacity change from 0 to 32768 [ 57.197646][ T5218] ======================================================= [ 57.197646][ T5218] WARNING: The mand mount option has been deprecated and [ 57.197646][ T5218] and is ignored by this kernel. Remove the mand [ 57.197646][ T5218] option from the mount to silence this warning. [ 57.197646][ T5218] ======================================================= [ 57.234865][ T5218] bcachefs (/dev/loop0): error reading default superblock: checksum error, type crc32c_nonzero: got 98a2a226 should be 29d2fb78 [ 57.274846][ T5218] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,compression=gzip,recovery_pass_last=check_dirents,nojournal_transaction_names,version_upgrade=none [ 57.292741][ T5218] [ 57.295054][ T5218] ============================================ [ 57.301175][ T5218] WARNING: possible recursive locking detected [ 57.307299][ T5218] 6.12.0-rc2-syzkaller-00291-g09f6b0c8904b #0 Not tainted [ 57.314377][ T5218] -------------------------------------------- [ 57.320497][ T5218] syz-executor384/5218 is trying to acquire lock: [ 57.326877][ T5218] ffff888072d80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_replicas_entry_validate+0x2a/0x80 [ 57.336696][ T5218] [ 57.336696][ T5218] but task is already holding lock: [ 57.344033][ T5218] ffff888072d80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 57.353756][ T5218] [ 57.353756][ T5218] other info that might help us debug this: [ 57.361791][ T5218] Possible unsafe locking scenario: [ 57.361791][ T5218] [ 57.369216][ T5218] CPU0 [ 57.372478][ T5218] ---- [ 57.375737][ T5218] lock(&c->sb_lock); [ 57.379780][ T5218] lock(&c->sb_lock); [ 57.383821][ T5218] [ 57.383821][ T5218] *** DEADLOCK *** [ 57.383821][ T5218] [ 57.391936][ T5218] May be due to missing lock nesting notation [ 57.391936][ T5218] [ 57.400226][ T5218] 2 locks held by syz-executor384/5218: [ 57.405758][ T5218] #0: ffff888072d80278 (&c->state_lock){+.+.}-{3:3}, at: bch2_fs_start+0x45/0x5b0 [ 57.415040][ T5218] #1: ffff888072d80908 (&c->sb_lock){+.+.}-{3:3}, at: bch2_read_superblock_clean+0x36/0x520 [ 57.425186][ T5218] [ 57.425186][ T5218] stack backtrace: [ 57.431067][ T5218] CPU: 1 UID: 0 PID: 5218 Comm: syz-executor384 Not tainted 6.12.0-rc2-syzkaller-00291-g09f6b0c8904b #0 [ 57.442146][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 57.452179][ T5218] Call Trace: [ 57.455439][ T5218] [ 57.458348][ T5218] dump_stack_lvl+0x241/0x360 [ 57.463008][ T5218] ? __pfx_dump_stack_lvl+0x10/0x10 [ 57.468179][ T5218] ? __pfx__printk+0x10/0x10 [ 57.472742][ T5218] ? lockdep_unlock+0x16a/0x300 [ 57.477570][ T5218] print_deadlock_bug+0x483/0x620 [ 57.482571][ T5218] validate_chain+0x15e2/0x5920 [ 57.487405][ T5218] ? __pfx_validate_chain+0x10/0x10 [ 57.492584][ T5218] ? mark_lock+0x9a/0x360 [ 57.496888][ T5218] ? __lock_acquire+0x1384/0x2050 [ 57.501891][ T5218] ? mark_lock+0x9a/0x360 [ 57.506196][ T5218] __lock_acquire+0x1384/0x2050 [ 57.511069][ T5218] lock_acquire+0x1ed/0x550 [ 57.515579][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 57.521457][ T5218] ? __pfx_lock_acquire+0x10/0x10 [ 57.526462][ T5218] ? lockdep_hardirqs_on+0x99/0x150 [ 57.531641][ T5218] ? __pfx___might_resched+0x10/0x10 [ 57.536905][ T5218] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 57.542774][ T5218] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 57.549078][ T5218] ? stack_trace_save+0x118/0x1d0 [ 57.554079][ T5218] __mutex_lock+0x136/0xd70 [ 57.558556][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 57.564423][ T5218] ? kasan_save_track+0x51/0x80 [ 57.569252][ T5218] ? kasan_save_track+0x3f/0x80 [ 57.574076][ T5218] ? __kasan_kmalloc+0x98/0xb0 [ 57.578814][ T5218] ? __kmalloc_node_track_caller_noprof+0x225/0x440 [ 57.585382][ T5218] ? kmemdup_noprof+0x2a/0x60 [ 57.590038][ T5218] ? bch2_read_superblock_clean+0xd6/0x520 [ 57.595822][ T5218] ? bch2_replicas_entry_validate+0x2a/0x80 [ 57.601692][ T5218] ? bch2_fs_start+0x356/0x5b0 [ 57.606441][ T5218] ? __pfx___mutex_lock+0x10/0x10 [ 57.611444][ T5218] ? do_syscall_64+0xf3/0x230 [ 57.616099][ T5218] bch2_replicas_entry_validate+0x2a/0x80 [ 57.621792][ T5218] journal_entry_data_usage_validate+0x2b6/0x690 [ 57.628097][ T5218] ? __pfx_journal_entry_data_usage_validate+0x10/0x10 [ 57.634922][ T5218] ? journal_entry_usage_validate+0xc2/0x360 [ 57.640876][ T5218] ? __pfx_journal_entry_usage_validate+0x10/0x10 [ 57.647265][ T5218] ? rcu_is_watching+0x15/0xb0 [ 57.652005][ T5218] ? trace_kmalloc+0x1f/0xd0 [ 57.656571][ T5218] ? __kmalloc_node_track_caller_noprof+0x242/0x440 [ 57.663133][ T5218] ? kmemdup_noprof+0x45/0x60 [ 57.667793][ T5218] ? bch2_journal_entry_validate+0x6a/0xf0 [ 57.673573][ T5218] bch2_read_superblock_clean+0x207/0x520 [ 57.679269][ T5218] bch2_fs_recovery+0x1f4/0x39c0 [ 57.684184][ T5218] ? mark_lock+0x9a/0x360 [ 57.688490][ T5218] ? __lock_acquire+0x1384/0x2050 [ 57.693492][ T5218] ? __pfx_bch2_fs_recovery+0x10/0x10 [ 57.698865][ T5218] ? __pfx_lock_release+0x10/0x10 [ 57.703879][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 57.709494][ T5218] ? __pfx_lock_release+0x10/0x10 [ 57.714503][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 57.720118][ T5218] ? bch2_get_next_online_dev+0x4b9/0x4f0 [ 57.725819][ T5218] ? bch2_get_next_online_dev+0x2b/0x4f0 [ 57.731435][ T5218] ? llist_reverse_order+0x72/0x90 [ 57.736523][ T5218] bch2_fs_start+0x356/0x5b0 [ 57.741096][ T5218] bch2_fs_get_tree+0xd68/0x1710 [ 57.746019][ T5218] ? __pfx_bch2_fs_get_tree+0x10/0x10 [ 57.751379][ T5218] ? generic_parse_monolithic+0x387/0x400 [ 57.757080][ T5218] ? cap_capable+0x1b4/0x250 [ 57.761677][ T5218] ? safesetid_security_capable+0xb2/0x1d0 [ 57.767485][ T5218] vfs_get_tree+0x90/0x2b0 [ 57.771890][ T5218] do_new_mount+0x2be/0xb40 [ 57.776380][ T5218] ? __pfx_do_new_mount+0x10/0x10 [ 57.781386][ T5218] __se_sys_mount+0x2d6/0x3c0 [ 57.786042][ T5218] ? __pfx___se_sys_mount+0x10/0x10 [ 57.791221][ T5218] ? do_syscall_64+0x100/0x230 [ 57.795962][ T5218] ? __x64_sys_mount+0x20/0xc0 [ 57.800706][ T5218] do_syscall_64+0xf3/0x230 [ 57.805185][ T5218] ? clear_bhb_loop+0x35/0x90 [ 57.809840][ T5218] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 57.815727][ T5218] RIP: 0033:0x7fb545b4ba3a [ 57.820129][ 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 [ 57.839716][ T5218] RSP: 002b:00007ffc65991f48 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 57.848109][ T5218] RAX: ffffffffffffffda RBX: 00007ffc65991f60 RCX: 00007fb545b4ba3a [ 57.856080][ T5218] RDX: 0000000020005d80 RSI: 0000000020000240 RDI: 00007ffc65991f60 [ 57.864037][ T5218] RBP: 0000000000000004 R08: 00007ffc65991fa0 R09: 0000000000005e24 [ 57.871989][ T5218] R10: 0000000000000044 R11: 0000000000000282 R12: 0000000000000044 [ 57.879936][ T5218] R13: 00007ffc65991fa0 R14: 0000000000000003 R15: 0000000001000000 [ 57.887886][ T5218]