./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2538466172 <...> Warning: Permanently added '10.128.0.159' (ED25519) to the list of known hosts. execve("./syz-executor2538466172", ["./syz-executor2538466172"], 0x7ffd30033b50 /* 10 vars */) = 0 brk(NULL) = 0x555590c20000 brk(0x555590c20d00) = 0x555590c20d00 arch_prctl(ARCH_SET_FS, 0x555590c20380) = 0 set_tid_address(0x555590c20650) = 5849 set_robust_list(0x555590c20660, 24) = 0 rseq(0x555590c20ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2538466172", 4096) = 28 getrandom("\x0f\x13\xd4\x19\xfa\xaa\x88\x91", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555590c20d00 brk(0x555590c41d00) = 0x555590c41d00 brk(0x555590c42000) = 0x555590c42000 mprotect(0x7ff72a057000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5850 attached [pid 5850] set_robust_list(0x555590c20660, 24) = 0 [pid 5850] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5849] <... clone resumed>, child_tidptr=0x555590c20650) = 5850 [pid 5850] <... prctl resumed>) = 0 [pid 5850] setpgid(0, 0) = 0 [pid 5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1000", 4) = 4 [pid 5850] close(3executing program ) = 0 [pid 5850] write(1, "executing program\n", 18) = 18 [pid 5850] memfd_create("syzkaller", 0) = 3 [pid 5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff721a00000 [pid 5850] 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 [pid 5850] munmap(0x7ff721a00000, 138412032) = 0 [pid 5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5850] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5850] close(3) = 0 [pid 5850] close(4) = 0 [pid 5850] mkdir("./file0", 0777) = 0 [ 201.090737][ T5850] loop0: detected capacity change from 0 to 32768 [ 201.182653][ T5850] bcachefs (baafa011-d992-4344-aaf9-4ff0e0bec0ff): Using encoding defined by superblock: utf8-12.1.0 [ 201.212946][ T5850] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,background_compression=lz4,nojournal_transaction_names,version_upgrade=none [ 201.212946][ T5850] allowing incompatible features above 0.0: (unknown version) [ 201.240514][ T5850] bcachefs (loop0): recovering from clean shutdown, journal seq 13 [ 201.263369][ T5850] bcachefs (loop0): accounting_read... done [ 201.270621][ T5850] bcachefs (loop0): alloc_read... done [ 201.276415][ T5850] bcachefs (loop0): snapshots_read... done [ 201.285109][ T5850] bcachefs (loop0): going read-write [ 201.296055][ T5850] bcachefs (loop0): journal_replay... done [ 201.302447][ T5850] bcachefs (loop0): resume_logged_ops... done [ 201.309391][ T5850] bcachefs (loop0): delete_dead_inodes... done [ 201.316622][ T5860] bcachefs (loop0): backpointer doesn't match extent it points to: [pid 5850] mount("/dev/loop0", "./file0", "bcachefs", 0, "version_upgrade=none,background_compression=lz4,") = 0 [pid 5850] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5850] chdir("./file0") = 0 [pid 5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5850] ioctl(4, LOOP_CLR_FD) = 0 [pid 5850] close(4) = 0 [ 201.316641][ T5860] u64s 9 type backpointer 0:8921088:0 len 0 ver 0: bucket=0:34:8 btree=extents level=0 data_type=user suboffset=0 len=8 gen=0 pos=1073741825:24:U32_MAX [ 201.316653][ T5860] u64s 8 type extent 1073741825:24:U32_MAX len 24 ver 2: durability: 1 crc: c_size 8 size 24 offset 0 nonce 0 csum chacha20_poly1305_80 5c1d:75853c64f7009f9d compress lz4 ptr: 0:34:8 gen 0 [ 201.316675][ T5860] u64s 9 type backpointer 0:8921088:0 len 0 ver 0: bucket=0:34:8 btree=extents level=0 data_type=user suboffset=0 len=8 gen=0 pos=1073741825:24:U32_MAX, fixing [ 201.376740][ T5850] bcachefs (loop0): done starting filesystem [pid 5850] chdir("./file0") = 0 [pid 5850] creat("./file0", 016 [pid 5849] kill(-5850, SIGKILL) = 0 [pid 5849] kill(5850, SIGKILL) = 0 [pid 5849] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5849] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5849] getdents64(3, 0x555590c216f0 /* 2 entries */, 32768) = 48 [pid 5849] getdents64(3, 0x555590c216f0 /* 0 entries */, 32768) = 0 [pid 5849] close(3) = 0 [ 232.636826][ T5850] Allocator stuck? Waited for 30 seconds [ 232.636855][ T5850] Allocator debug: [ 232.636867][ T5850] capacity1536 [ 232.636877][ T5850] reserved 31232 [ 232.636887][ T5850] hidden 0 [ 232.636897][ T5850] btree 0 [ 232.636908][ T5850] data 0 [ 232.636918][ T5850] cached 0 [ 232.636928][ T5850] reserved 0 [ 232.636939][ T5850] online_reserved 768 [ 232.636949][ T5850] nr_inodes 0 [ 232.636959][ T5850] [ 232.636968][ T5850] freelist_wait waiting [ 232.636978][ T5850] open buckets allocated1 [ 232.636989][ T5850] open buckets total 1024 [ 232.636999][ T5850] open_buckets_wait empty [ 232.637009][ T5850] open_buckets_btree 0 [ 232.637019][ T5850] open_buckets_user 0 [ 232.637030][ T5850] btree reserve cache 0 [ 232.637040][ T5850] [ 232.637049][ T5850] Dev 0: [ 232.637058][ T5850] buckets sectors fragmented [ 232.637070][ T5850] free 0 0 0 [ 232.637082][ T5850] sb 0 0 0 [ 232.637094][ T5850] journal 0 0 0 [ 232.637106][ T5850] btree 0 0 0 [ 232.637119][ T5850] user 0 0 0 [ 232.637131][ T5850] cached 0 0 0 [ 232.637143][ T5850] parity 0 0 0 [ 232.637155][ T5850] stripe 0 0 0 [ 232.637167][ T5850] need_gc_gens 0 0 0 [ 232.637179][ T5850] need_discard 0 0 0 [ 232.637192][ T5850] unstriped 0 0 0 [ 232.637204][ T5850] capacity 128 [ 232.637214][ T5850] [ 232.637223][ T5850] reserves: [ 232.637233][ T5850] stripe 60 [ 232.637243][ T5850] normal 58 [ 232.637254][ T5850] copygc 56 [ 232.637264][ T5850] btree 28 [ 232.637275][ T5850] btree_copygc 0 [ 232.637285][ T5850] reclaim 0 [ 232.637295][ T5850] interior_updates 0 [ 232.637305][ T5850] [ 232.637314][ T5850] open buckets 0 [ 232.637325][ T5850] buckets to invalidate 0 [ 232.637335][ T5850] [ 232.637344][ T5850] Copygc debug: [ 232.637353][ T5850] running: 1 [ 232.637363][ T5850] copygc_wait:0 [ 232.637372][ T5850] copygc_wait_at:0 [ 232.637382][ T5850] Currently waiting for:0 B [ 232.637393][ T5850] Currently waiting since:640 KiB [ 232.637403][ T5850] Currently calculated wait:0 B [ 232.637414][ T5850] [ 232.637422][ T5850] Journal debug: [ 232.637432][ T5850] flags: replay_done,running,may_skip_flush [ 232.637444][ T5850] dirty journal entries: 0/32768 [ 232.637455][ T5850] seq: 14 [ 232.637465][ T5850] seq_ondisk: 14 [ 232.637476][ T5850] last_seq: 15 [ 232.637486][ T5850] last_seq_ondisk: 14 [ 232.637497][ T5850] flushed_seq_ondisk: 14 [ 232.637507][ T5850] watermark: stripe [ 232.637518][ T5850] each entry reserved: 321 [ 232.637528][ T5850] nr flush writes: 1 [ 232.637539][ T5850] nr noflush writes: 0 [ 232.637549][ T5850] average write size: 1.27 KiB [ 232.637567][ T5850] free buf: 65536 [ 232.637577][ T5850] nr direct reclaim: 0 [ 232.637588][ T5850] nr background reclaim: 1 [ 232.637598][ T5850] reclaim kicked: 0 [ 232.637609][ T5850] reclaim runs in: 0 ms [ 232.637619][ T5850] blocked: 0 [ 232.637629][ T5850] current entry sectors: 256 [ 232.637640][ T5850] current entry error: (No error) [ 232.637651][ T5850] current entry: closed [ 232.637661][ T5850] unwritten entries: [ 232.637671][ T5850] last buf closed [ 232.637681][ T5850] space: [ 232.637690][ T5850] discarded 256:1536 [ 232.637701][ T5850] clean ondisk 256:1536 [ 232.637711][ T5850] clean 256:1536 [ 232.637722][ T5850] total 256:2048 [ 232.637733][ T5850] dev 0: [ 232.637742][ T5850] durability 1: [ 232.637752][ T5850] nr 8 [ 232.637763][ T5850] bucket size 256 [ 232.637773][ T5850] available 6:248 [ 232.637784][ T5850] discard_idx 0 [ 232.637794][ T5850] dirty_ondisk 0 (seq 14) [ 232.637805][ T5850] dirty_idx 0 (seq 14) [ 232.637816][ T5850] cur_idx 0 (seq 14) [ 232.637827][ T5850] replicas want 1 need 1 [ 429.745666][ T31] INFO: task syz-executor253:5850 blocked for more than 143 seconds. [ 429.753843][ T31] Not tainted 6.15.0-rc5-syzkaller-00204-g0e1329d4045c #0 [ 429.762162][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.771224][ T31] task:syz-executor253 state:D stack:21192 pid:5850 tgid:5850 ppid:5849 task_flags:0x400140 flags:0x00004006 [ 429.784017][ T31] Call Trace: [ 429.787621][ T31] [ 429.790611][ T31] __schedule+0x168f/0x4c70 [ 429.795185][ T31] ? schedule+0x165/0x360 [ 429.800095][ T31] ? __pfx___schedule+0x10/0x10 [ 429.805023][ T31] ? schedule+0x91/0x360 [ 429.809764][ T31] schedule+0x165/0x360 [ 429.813982][ T31] ? __closure_sync+0x113/0x220 [ 429.819452][ T31] __closure_sync+0x163/0x220 [ 429.824207][ T31] ? __pfx___closure_sync+0x10/0x10 [ 429.830014][ T31] ? __bch2_wait_on_allocator+0x1c7/0x240 [ 429.836131][ T31] bch2_btree_update_start+0x1193/0x14c0 [ 429.841846][ T31] ? bch2_btree_split_leaf+0x13c/0x8f0 [ 429.847802][ T31] ? __pfx_bch2_btree_update_start+0x10/0x10 [ 429.853876][ T31] ? __pfx_bch2_btree_path_peek_slot+0x10/0x10 [ 429.860534][ T31] ? __pfx_closure_sync_fn+0x10/0x10 [ 429.866188][ T31] ? bch2_btree_path_peek_slot+0x3f4/0xff0 [ 429.872142][ T31] ? __asan_memcpy+0x40/0x70 [ 429.877314][ T31] bch2_btree_split_leaf+0x13c/0x8f0 [ 429.882681][ T31] bch2_trans_commit_error+0x1a8/0x1100 [ 429.889251][ T31] ? bch2_logged_op_start+0x170/0x280 [ 429.894793][ T31] ? six_unlock_ip+0x302/0x430 [ 429.900061][ T31] ? __pfx_bch2_trans_commit_error+0x10/0x10 [ 429.906418][ T31] ? bch2_trans_verify_locks+0x31e/0x3c0 [ 429.912117][ T31] __bch2_trans_commit+0x779c/0x8ae0 [ 429.917944][ T31] ? bch2_logged_op_start+0x170/0x280 [ 429.923552][ T31] ? bch2_trans_begin+0x18e6/0x1f10 [ 429.929280][ T31] ? __pfx___bch2_trans_commit+0x10/0x10 [ 429.934974][ T31] ? __pfx_bch2_trans_update+0x10/0x10 [ 429.940942][ T31] ? bch2_path_put+0x1b2/0x1cc0 [ 429.946174][ T31] bch2_logged_op_start+0x170/0x280 [ 429.951433][ T31] ? __pfx_bch2_logged_op_start+0x10/0x10 [ 429.957488][ T31] ? bch2_truncate+0xeb/0x200 [ 429.962238][ T31] ? bch2_bkey_get_empty_slot+0xfd/0x500 [ 429.968394][ T31] ? __bch2_trans_get+0x9d7/0xda0 [ 429.973496][ T31] bch2_truncate+0x128/0x200 [ 429.978588][ T31] ? __pfx_bch2_truncate+0x10/0x10 [ 429.983852][ T31] ? unmap_mapping_range+0xde/0x170 [ 429.989572][ T31] ? truncate_setsize+0xcf/0xf0 [ 429.994485][ T31] bchfs_truncate+0x7b7/0xcc0 [ 430.000085][ T31] ? __pfx_bchfs_truncate+0x10/0x10 [ 430.005653][ T31] ? bch2_trans_put+0xa67/0x10a0 [ 430.010679][ T31] ? setattr_prepare+0x1e7/0xac0 [ 430.016195][ T31] ? bch2_setattr+0x1a7/0x220 [ 430.020930][ T31] ? __pfx_bch2_setattr+0x10/0x10 [ 430.026437][ T31] notify_change+0xb33/0xe40 [ 430.031102][ T31] do_truncate+0x19a/0x220 [ 430.035839][ T31] ? __pfx_do_truncate+0x10/0x10 [ 430.040858][ T31] path_openat+0x306c/0x3830 [ 430.046091][ T31] ? __pfx_path_openat+0x10/0x10 [ 430.051088][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.057747][ T31] do_filp_open+0x1fa/0x410 [ 430.062314][ T31] ? __pfx_do_filp_open+0x10/0x10 [ 430.067864][ T31] ? _raw_spin_unlock+0x28/0x50 [ 430.072771][ T31] ? alloc_fd+0x64c/0x6c0 [ 430.077608][ T31] do_sys_openat2+0x121/0x1c0 [ 430.082346][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 430.087964][ T31] ? __pfx_do_sys_openat2+0x10/0x10 [ 430.093229][ T31] ? rcu_is_watching+0x15/0xb0 [ 430.098516][ T31] __x64_sys_creat+0x8f/0xc0 [ 430.103168][ T31] do_syscall_64+0xf6/0x210 [ 430.108565][ T31] ? clear_bhb_loop+0x45/0xa0 [ 430.113301][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.119719][ T31] RIP: 0033:0x7ff729fd4ad9 [ 430.124205][ T31] RSP: 002b:00007ffc86562e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 430.133270][ T31] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007ff729fd4ad9 [ 430.141633][ T31] RDX: 00007ff729fd4ad9 RSI: 000000000000000e RDI: 00002000000023c0 [ 430.150134][ T31] RBP: 00007ff72a0575f0 R08: 0000555590c214c0 R09: 0000555590c214c0 [ 430.158628][ T31] R10: 000000000000f624 R11: 0000000000000246 R12: 00007ffc86562e40 [ 430.166959][ T31] R13: 00007ffc86563068 R14: 431bde82d7b634db R15: 00007ff72a01d03b [ 430.175011][ T31] [ 430.178544][ T31] [ 430.178544][ T31] Showing all locks held in the system: [ 430.186731][ T31] 1 lock held by khungtaskd/31: [ 430.191629][ T31] #0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.202140][ T31] 2 locks held by getty/5574: [ 430.207153][ T31] #0: ffff88814d3be0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.217762][ T31] #1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.228285][ T31] 5 locks held by syz-executor253/5850: [ 430.233878][ T31] #0: ffff88806f1dc420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 430.243601][ T31] #1: ffff888077369078 (&sb->s_type->i_mutex_key#14){++++}-{4:4}, at: do_truncate+0x186/0x220 [ 430.254379][ T31] #2: ffff888075680a70 (&c->snapshot_create_lock){.+.+}-{4:4}, at: bch2_truncate+0xeb/0x200 [ 430.264990][ T31] #3: ffff888075684228 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x806/0xda0 [ 430.275859][ T31] #4: ffff8880756a6590 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x68f/0x14c0 [ 430.286390][ T31] 2 locks held by bch-copygc/loop/5860: [ 430.291985][ T31] [ 430.294433][ T31] ============================================= [ 430.294433][ T31] [ 430.303590][ T31] NMI backtrace for cpu 0 [ 430.303617][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc5-syzkaller-00204-g0e1329d4045c #0 PREEMPT(full) [ 430.303642][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.303654][ T31] Call Trace: [ 430.303661][ T31] [ 430.303669][ T31] dump_stack_lvl+0x189/0x250 [ 430.303700][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.303725][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.303752][ T31] ? __pfx__printk+0x10/0x10 [ 430.303795][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.303831][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.303858][ T31] ? _printk+0xcf/0x120 [ 430.303893][ T31] ? __pfx__printk+0x10/0x10 [ 430.303926][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.303960][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.304022][ T31] watchdog+0xfee/0x1030 [ 430.304049][ T31] ? watchdog+0x1de/0x1030 [ 430.304080][ T31] kthread+0x70e/0x8a0 [ 430.304106][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.304128][ T31] ? __pfx_kthread+0x10/0x10 [ 430.304151][ T31] ? __pfx_kthread+0x10/0x10 [ 430.304171][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.304191][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.304213][ T31] ? __pfx_kthread+0x10/0x10 [ 430.304233][ T31] ret_from_fork+0x4b/0x80 [ 430.304250][ T31] ? __pfx_kthread+0x10/0x10 [ 430.304271][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.304316][ T31] [ 430.304323][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.452240][ C1] NMI backtrace for cpu 1 [ 430.452263][ C1] CPU: 1 UID: 0 PID: 5860 Comm: bch-copygc/loop Not tainted 6.15.0-rc5-syzkaller-00204-g0e1329d4045c #0 PREEMPT(full) [ 430.452285][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.452296][ C1] RIP: 0010:__sanitizer_cov_trace_switch+0x8a/0x130 [ 430.452322][ C1] Code: 85 c0 0f 84 b4 00 00 00 41 57 41 56 41 54 53 48 8b 54 24 20 65 4c 8b 04 25 08 00 72 92 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 <4e> 8b 54 ce 10 65 44 8b 1d d9 2a b2 10 41 81 e3 00 01 ff 00 74 13 [ 430.452336][ C1] RSP: 0018:ffffc900044ff958 EFLAGS: 00000246 [ 430.452352][ C1] RAX: 0000000000000002 RBX: 1ffff1100ea85850 RCX: 0000000000000005 [ 430.452364][ C1] RDX: ffffffff841dfb4d RSI: ffffffff8e55a360 RDI: 0000000000000001 [ 430.452375][ C1] RBP: 0000000000000000 R08: ffff88802ffcbc00 R09: 0000000000000000 [ 430.452386][ C1] R10: dffffc0000000000 R11: ffffed100fbfe701 R12: 0000000000000000 [ 430.452398][ C1] R13: 0000000000000001 R14: ffff88807542c268 R15: ffff88807542c282 [ 430.452409][ C1] FS: 0000000000000000(0000) GS:ffff888126200000(0000) knlGS:0000000000000000 [ 430.452423][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.452435][ C1] CR2: 000055b01d422168 CR3: 00000000326d2000 CR4: 00000000003526f0 [ 430.452450][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.452475][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.452485][ C1] Call Trace: [ 430.452492][ C1] [ 430.452501][ C1] btree_node_unlock+0x8d/0x240 [ 430.452522][ C1] bch2_trans_unlock+0x1d3/0x4b0 [ 430.452543][ C1] ? bch2_copygc_thread+0x17b/0xd40 [ 430.452565][ C1] bch2_trans_unlock_long+0x15/0x20 [ 430.452582][ C1] bch2_copygc_thread+0x4b2/0xd40 [ 430.452604][ C1] ? bch2_copygc_thread+0x17b/0xd40 [ 430.452635][ C1] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.452657][ C1] ? bch2_copygc_thread+0x3dd/0xd40 [ 430.452699][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 430.452716][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.452742][ C1] ? __kthread_parkme+0x7b/0x200 [ 430.452758][ C1] ? __kthread_parkme+0x1a1/0x200 [ 430.452776][ C1] kthread+0x70e/0x8a0 [ 430.452795][ C1] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.452816][ C1] ? __pfx_kthread+0x10/0x10 [ 430.452834][ C1] ? __pfx_kthread+0x10/0x10 [ 430.452850][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.452866][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.452883][ C1] ? __pfx_kthread+0x10/0x10 [ 430.452900][ C1] ret_from_fork+0x4b/0x80 [ 430.452916][ C1] ? __pfx_kthread+0x10/0x10 [ 430.452933][ C1] ret_from_fork_asm+0x1a/0x30 [ 430.452973][ C1] [ 430.453254][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.717480][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc5-syzkaller-00204-g0e1329d4045c #0 PREEMPT(full) [ 430.729297][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.739365][ T31] Call Trace: [ 430.742689][ T31] [ 430.745642][ T31] dump_stack_lvl+0x99/0x250 [ 430.750517][ T31] ? __asan_memcpy+0x40/0x70 [ 430.755136][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.760443][ T31] ? __pfx__printk+0x10/0x10 [ 430.765077][ T31] panic+0x2db/0x790 [ 430.769021][ T31] ? __pfx_panic+0x10/0x10 [ 430.773481][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.779323][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.784807][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 430.790995][ T31] watchdog+0x102d/0x1030 [ 430.795356][ T31] ? watchdog+0x1de/0x1030 [ 430.799811][ T31] kthread+0x70e/0x8a0 [ 430.803901][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.808597][ T31] ? __pfx_kthread+0x10/0x10 [ 430.813309][ T31] ? __pfx_kthread+0x10/0x10 [ 430.817917][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.823129][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.828351][ T31] ? __pfx_kthread+0x10/0x10 [ 430.833134][ T31] ret_from_fork+0x4b/0x80 [ 430.837572][ T31] ? __pfx_kthread+0x10/0x10 [ 430.842183][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.847183][ T31] [ 430.850378][ T31] Kernel Offset: disabled [ 430.854716][ T31] Rebooting in 86400 seconds..