./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2866086841 <...> Warning: Permanently added '10.128.1.54' (ED25519) to the list of known hosts. execve("./syz-executor2866086841", ["./syz-executor2866086841"], 0x7fff0b688be0 /* 10 vars */) = 0 brk(NULL) = 0x5555791a9000 brk(0x5555791a9d00) = 0x5555791a9d00 arch_prctl(ARCH_SET_FS, 0x5555791a9380) = 0 set_tid_address(0x5555791a9650) = 5844 set_robust_list(0x5555791a9660, 24) = 0 rseq(0x5555791a9ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2866086841", 4096) = 28 getrandom("\xf1\x23\xac\x9e\x45\xd3\xef\x9e", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555791a9d00 brk(0x5555791cad00) = 0x5555791cad00 brk(0x5555791cb000) = 0x5555791cb000 mprotect(0x7f870a732000, 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, child_tidptr=0x5555791a9650) = 5846 ./strace-static-x86_64: Process 5846 attached [pid 5846] set_robust_list(0x5555791a9660, 24) = 0 [pid 5846] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5846] setpgid(0, 0) = 0 [pid 5846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5846] write(3, "1000", 4) = 4 [pid 5846] close(3) = 0 executing program [pid 5846] write(1, "executing program\n", 18) = 18 [pid 5846] memfd_create("syzkaller", 0) = 3 [pid 5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8702200000 [pid 5846] 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 5846] munmap(0x7f8702200000, 138412032) = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5846] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5846] close(3) = 0 [pid 5846] close(4) = 0 [pid 5846] mkdir("./file0", 0777) = 0 [ 174.388790][ T5846] loop0: detected capacity change from 0 to 32768 [ 174.503940][ T5846] bcachefs (baafa011-d992-4344-aaf9-4ff0e0bec0ff): Using encoding defined by superblock: utf8-12.1.0 [ 174.529856][ T5846] 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 [ 174.529856][ T5846] allowing incompatible features above 0.0: (unknown version) [ 174.556841][ T5846] bcachefs (loop0): recovering from clean shutdown, journal seq 13 [ 174.578820][ T5846] bcachefs (loop0): accounting_read... done [ 174.586155][ T5846] bcachefs (loop0): alloc_read... done [ 174.591966][ T5846] bcachefs (loop0): snapshots_read... done [ 174.600783][ T5846] bcachefs (loop0): going read-write [ 174.610319][ T5846] bcachefs (loop0): journal_replay... done [ 174.616589][ T5846] bcachefs (loop0): resume_logged_ops... done [ 174.623114][ T5846] bcachefs (loop0): delete_dead_inodes... done [ 174.629606][ T5855] bcachefs (loop0): backpointer doesn't match extent it points to: [ 174.629625][ T5855] 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 [pid 5846] mount("/dev/loop0", "./file0", "bcachefs", 0, "version_upgrade=none,background_compression=lz4,") = 0 [pid 5846] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5846] chdir("./file0") = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5846] ioctl(4, LOOP_CLR_FD) = 0 [pid 5846] close(4) = 0 [ 174.629640][ T5855] 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 [ 174.629657][ T5855] 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 [ 174.689326][ T5846] bcachefs (loop0): done starting filesystem [pid 5846] mknod("./bus", S_IFIFO|000 [pid 5844] kill(-5846, SIGKILL) = 0 [pid 5844] kill(5846, SIGKILL) = 0 [pid 5844] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5844] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5844] getdents64(3, 0x5555791aa6f0 /* 2 entries */, 32768) = 48 [pid 5844] getdents64(3, 0x5555791aa6f0 /* 0 entries */, 32768) = 0 [pid 5844] close(3) = 0 [ 206.416288][ T5846] Allocator stuck? Waited for 30 seconds [ 206.416319][ T5846] Allocator debug: [ 206.416330][ T5846] capacity1536 [ 206.416340][ T5846] reserved 31232 [ 206.416350][ T5846] hidden 0 [ 206.416360][ T5846] btree 0 [ 206.416370][ T5846] data 0 [ 206.416379][ T5846] cached 0 [ 206.416389][ T5846] reserved 0 [ 206.416399][ T5846] online_reserved 768 [ 206.416409][ T5846] nr_inodes 0 [ 206.416418][ T5846] [ 206.416427][ T5846] freelist_wait waiting [ 206.416437][ T5846] open buckets allocated1 [ 206.416447][ T5846] open buckets total 1024 [ 206.416457][ T5846] open_buckets_wait empty [ 206.416467][ T5846] open_buckets_btree 0 [ 206.416477][ T5846] open_buckets_user 0 [ 206.416486][ T5846] btree reserve cache 0 [ 206.416496][ T5846] [ 206.416505][ T5846] Dev 0: [ 206.416513][ T5846] buckets sectors fragmented [ 206.416532][ T5846] free 0 0 0 [ 206.416543][ T5846] sb 0 0 0 [ 206.416555][ T5846] journal 0 0 0 [ 206.416567][ T5846] btree 0 0 0 [ 206.416578][ T5846] user 0 0 0 [ 206.416590][ T5846] cached 0 0 0 [ 206.416601][ T5846] parity 0 0 0 [ 206.416613][ T5846] stripe 0 0 0 [ 206.416625][ T5846] need_gc_gens 0 0 0 [ 206.416636][ T5846] need_discard 0 0 0 [ 206.416648][ T5846] unstriped 0 0 0 [ 206.416660][ T5846] capacity 128 [ 206.416669][ T5846] [ 206.416678][ T5846] reserves: [ 206.416687][ T5846] stripe 60 [ 206.416697][ T5846] normal 58 [ 206.416707][ T5846] copygc 56 [ 206.416717][ T5846] btree 28 [ 206.416727][ T5846] btree_copygc 0 [ 206.416737][ T5846] reclaim 0 [ 206.416747][ T5846] interior_updates 0 [ 206.416756][ T5846] [ 206.416765][ T5846] open buckets 0 [ 206.416775][ T5846] buckets to invalidate 0 [ 206.416785][ T5846] [ 206.416793][ T5846] Copygc debug: [ 206.416802][ T5846] running: 1 [ 206.416812][ T5846] copygc_wait:0 [ 206.416821][ T5846] copygc_wait_at:0 [ 206.416830][ T5846] Currently waiting for:0 B [ 206.416840][ T5846] Currently waiting since:640 KiB [ 206.416850][ T5846] Currently calculated wait:0 B [ 206.416860][ T5846] [ 206.416869][ T5846] Journal debug: [ 206.416878][ T5846] flags: replay_done,running,may_skip_flush [ 206.416890][ T5846] dirty journal entries: 0/32768 [ 206.416900][ T5846] seq: 14 [ 206.416910][ T5846] seq_ondisk: 14 [ 206.416920][ T5846] last_seq: 15 [ 206.416930][ T5846] last_seq_ondisk: 14 [ 206.416940][ T5846] flushed_seq_ondisk: 14 [ 206.416950][ T5846] watermark: stripe [ 206.416960][ T5846] each entry reserved: 321 [ 206.416970][ T5846] nr flush writes: 1 [ 206.416980][ T5846] nr noflush writes: 0 [ 206.416990][ T5846] average write size: 1.27 KiB [ 206.417000][ T5846] free buf: 65536 [ 206.417011][ T5846] nr direct reclaim: 0 [ 206.417021][ T5846] nr background reclaim: 1 [ 206.417030][ T5846] reclaim kicked: 0 [ 206.417040][ T5846] reclaim runs in: 0 ms [ 206.417050][ T5846] blocked: 0 [ 206.417060][ T5846] current entry sectors: 256 [ 206.417070][ T5846] current entry error: (No error) [ 206.417081][ T5846] current entry: closed [ 206.417091][ T5846] unwritten entries: [ 206.417100][ T5846] last buf closed [ 206.417110][ T5846] space: [ 206.417119][ T5846] discarded 256:1536 [ 206.417129][ T5846] clean ondisk 256:1536 [ 206.417139][ T5846] clean 256:1536 [ 206.417149][ T5846] total 256:2048 [ 206.417160][ T5846] dev 0: [ 206.417169][ T5846] durability 1: [ 206.417178][ T5846] nr 8 [ 206.417200][ T5846] bucket size 256 [ 206.417211][ T5846] available 6:248 [ 206.417221][ T5846] discard_idx 0 [ 206.417231][ T5846] dirty_ondisk 0 (seq 14) [ 206.417241][ T5846] dirty_idx 0 (seq 14) [ 206.417251][ T5846] cur_idx 0 (seq 14) [ 206.417262][ T5846] replicas want 1 need 1 [ 429.765316][ T31] INFO: task syz-executor286:5846 blocked for more than 143 seconds. [ 429.773565][ T31] Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 [ 429.781906][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.791007][ T31] task:syz-executor286 state:D stack:19624 pid:5846 tgid:5846 ppid:5844 task_flags:0x400140 flags:0x00004006 [ 429.803361][ T31] Call Trace: [ 429.806953][ T31] [ 429.809932][ T31] __schedule+0x168f/0x4c70 [ 429.814550][ T31] ? schedule+0x165/0x360 [ 429.819474][ T31] ? __pfx___schedule+0x10/0x10 [ 429.824389][ T31] ? schedule+0x91/0x360 [ 429.829078][ T31] schedule+0x165/0x360 [ 429.833280][ T31] ? __closure_sync+0x113/0x220 [ 429.838601][ T31] __closure_sync+0x163/0x220 [ 429.843342][ T31] ? __pfx___closure_sync+0x10/0x10 [ 429.849031][ T31] ? __bch2_wait_on_allocator+0x1c7/0x240 [ 429.854801][ T31] bch2_btree_update_start+0x1193/0x14c0 [ 429.860945][ T31] ? bch2_btree_split_leaf+0x13c/0x8f0 [ 429.867171][ T31] ? __pfx_bch2_btree_update_start+0x10/0x10 [ 429.873214][ T31] ? stack_depot_save_flags+0x42b/0x910 [ 429.879245][ T31] ? __pfx_closure_sync_fn+0x10/0x10 [ 429.884586][ T31] ? bch2_mknod+0x67/0xd0 [ 429.889378][ T31] ? vfs_mknod+0x37c/0x3c0 [ 429.893840][ T31] ? do_mknodat+0x385/0x4d0 [ 429.898762][ T31] ? __x64_sys_mknod+0x8c/0xa0 [ 429.903569][ T31] ? do_syscall_64+0xf6/0x210 [ 429.908695][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.914815][ T31] bch2_btree_split_leaf+0x13c/0x8f0 [ 429.920542][ T31] bch2_trans_commit_error+0x1a8/0x1100 [ 429.926386][ T31] ? __bch2_create+0x887/0xb90 [ 429.931206][ T31] ? six_unlock_ip+0x302/0x430 [ 429.936384][ T31] ? __pfx_bch2_trans_commit_error+0x10/0x10 [ 429.942437][ T31] ? bch2_trans_verify_locks+0x31e/0x3c0 [ 429.948508][ T31] __bch2_trans_commit+0x779c/0x8ae0 [ 429.953867][ T31] ? __bch2_create+0x887/0xb90 [ 429.959416][ T31] ? __bch2_bkey_get_val_typed+0x279/0x390 [ 429.965598][ T31] ? __pfx___bch2_trans_commit+0x10/0x10 [ 429.971287][ T31] ? __bch2_bkey_get_val_typed+0x121/0x390 [ 429.977939][ T31] ? __pfx_bch2_subvol_is_ro_trans+0x10/0x10 [ 429.983973][ T31] ? from_kgid+0x1b0/0x650 [ 429.988803][ T31] ? bch2_subvolume_get+0x65/0x100 [ 429.993971][ T31] ? bch2_subvolume_get+0x7d/0x100 [ 429.999514][ T31] __bch2_create+0x887/0xb90 [ 430.004170][ T31] ? __pfx___bch2_create+0x10/0x10 [ 430.009575][ T31] ? tomoyo_path_number_perm+0x1bc/0x5a0 [ 430.015611][ T31] ? smack_log+0xef/0x3f0 [ 430.020008][ T31] ? smk_tskacc+0x2fc/0x370 [ 430.024574][ T31] ? smack_inode_permission+0x28f/0x320 [ 430.030705][ T31] ? from_kgid+0x1b0/0x650 [ 430.035440][ T31] ? generic_permission+0x2e5/0x690 [ 430.040685][ T31] bch2_mknod+0x67/0xd0 [ 430.044883][ T31] vfs_mknod+0x37c/0x3c0 [ 430.049670][ T31] do_mknodat+0x385/0x4d0 [ 430.054054][ T31] ? __pfx_do_mknodat+0x10/0x10 [ 430.059369][ T31] ? getname_flags+0x1e5/0x540 [ 430.064175][ T31] __x64_sys_mknod+0x8c/0xa0 [ 430.069178][ T31] do_syscall_64+0xf6/0x210 [ 430.073723][ T31] ? clear_bhb_loop+0x45/0xa0 [ 430.078821][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.084752][ T31] RIP: 0033:0x7f870a6aed59 [ 430.090025][ T31] RSP: 002b:00007ffec8ab8338 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 [ 430.098792][ T31] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f870a6aed59 [ 430.107074][ T31] RDX: 0000000000000000 RSI: 0000000000001000 RDI: 0000200000000080 [ 430.115344][ T31] RBP: 00007f870a7325f0 R08: 000000000000f624 R09: 00005555791aa4c0 [ 430.123354][ T31] R10: 00007ffec8ab8200 R11: 0000000000000246 R12: 00007ffec8ab8360 [ 430.131781][ T31] R13: 00007ffec8ab8588 R14: 431bde82d7b634db R15: 00007f870a6f803b [ 430.140129][ T31] [ 430.143203][ T31] [ 430.143203][ T31] Showing all locks held in the system: [ 430.151448][ T31] 1 lock held by khungtaskd/31: [ 430.156644][ T31] #0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.167585][ T31] 2 locks held by getty/5580: [ 430.172296][ T31] #0: ffff888034caa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.182483][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.193009][ T31] 5 locks held by syz-executor286/5846: [ 430.199303][ T31] #0: ffff88807dfa4420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 430.208799][ T31] #1: ffff888077ae0148 (&sb->s_type->i_mutex_key#14/1){+.+.}-{4:4}, at: filename_create+0x1f9/0x470 [ 430.220149][ T31] #2: ffff888077ae0530 (&inode->ei_update_lock){+.+.}-{4:4}, at: __bch2_create+0x2f2/0xb90 [ 430.230589][ T31] #3: ffff888078184228 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x806/0xda0 [ 430.241404][ T31] #4: ffff8880781a6590 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x68f/0x14c0 [ 430.251954][ T31] 2 locks held by bch-copygc/loop/5855: [ 430.257882][ T31] [ 430.260248][ T31] ============================================= [ 430.260248][ T31] [ 430.269237][ T31] NMI backtrace for cpu 0 [ 430.269263][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 PREEMPT(full) [ 430.269293][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 [ 430.269305][ T31] Call Trace: [ 430.269314][ T31] [ 430.269321][ T31] dump_stack_lvl+0x189/0x250 [ 430.269352][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.269376][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.269403][ T31] ? __pfx__printk+0x10/0x10 [ 430.269446][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.269481][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.269509][ T31] ? _printk+0xcf/0x120 [ 430.269543][ T31] ? __pfx__printk+0x10/0x10 [ 430.269576][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.269610][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.269644][ T31] watchdog+0xfee/0x1030 [ 430.269670][ T31] ? watchdog+0x1de/0x1030 [ 430.269700][ T31] kthread+0x70e/0x8a0 [ 430.269726][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.269748][ T31] ? __pfx_kthread+0x10/0x10 [ 430.269770][ T31] ? __pfx_kthread+0x10/0x10 [ 430.269790][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.269810][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.269833][ T31] ? __pfx_kthread+0x10/0x10 [ 430.269853][ T31] ret_from_fork+0x4b/0x80 [ 430.269870][ T31] ? __pfx_kthread+0x10/0x10 [ 430.269891][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.269936][ T31] [ 430.269943][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.417347][ C1] NMI backtrace for cpu 1 [ 430.417369][ C1] CPU: 1 UID: 0 PID: 5855 Comm: bch-copygc/loop Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 PREEMPT(full) [ 430.417390][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 [ 430.417401][ C1] RIP: 0010:lock_acquire+0xb/0x360 [ 430.417427][ C1] Code: 95 c0 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 <41> 54 53 48 83 ec 60 4d 89 ce 45 89 c7 41 89 cc 89 54 24 04 89 f3 [ 430.417441][ C1] RSP: 0018:ffffc9000415ef08 EFLAGS: 00000246 [ 430.417456][ C1] RAX: 0000000000000001 RBX: ffffffff8171d298 RCX: 0000000000000002 [ 430.417467][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8df3b860 [ 430.417478][ C1] RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 [ 430.417488][ C1] R10: ffffc9000415f068 R11: fffff5200082be19 R12: 1ffff9200082be0d [ 430.417500][ C1] R13: ffffc9000415f0a0 R14: ffffc9000415f068 R15: ffffffff8171a9f5 [ 430.417512][ C1] FS: 0000000000000000(0000) GS:ffff888126200000(0000) knlGS:0000000000000000 [ 430.417525][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.417536][ C1] CR2: 00007ffde2a2af19 CR3: 000000000dd36000 CR4: 00000000003526f0 [ 430.417551][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.417560][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.417570][ C1] Call Trace: [ 430.417576][ C1] [ 430.417584][ C1] ? unwind_next_frame+0xa5/0x2390 [ 430.417603][ C1] unwind_next_frame+0xc2/0x2390 [ 430.417620][ C1] ? unwind_next_frame+0xa5/0x2390 [ 430.417642][ C1] ? get_stack_info_noinstr+0x1b/0x130 [ 430.417671][ C1] __unwind_start+0x5b9/0x760 [ 430.417691][ C1] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 430.417708][ C1] arch_stack_walk+0xe4/0x150 [ 430.417730][ C1] ? __unwind_start+0xf8/0x760 [ 430.417749][ C1] stack_trace_save+0x9c/0xe0 [ 430.417764][ C1] ? __pfx_stack_trace_save+0x10/0x10 [ 430.417781][ C1] ? unwind_next_frame+0xa5/0x2390 [ 430.417802][ C1] kasan_save_track+0x3e/0x80 [ 430.417851][ C1] kasan_save_free_info+0x46/0x50 [ 430.417868][ C1] __kasan_slab_free+0x62/0x70 [ 430.417890][ C1] ? move_buckets_wait+0x1024/0x12d0 [ 430.417911][ C1] kfree+0x193/0x440 [ 430.417932][ C1] ? move_buckets_wait+0x4a7/0x12d0 [ 430.417954][ C1] move_buckets_wait+0x1024/0x12d0 [ 430.417981][ C1] ? move_buckets_wait+0x4a7/0x12d0 [ 430.418012][ C1] ? __pfx_move_buckets_wait+0x10/0x10 [ 430.418033][ C1] ? kasan_quarantine_put+0xdd/0x220 [ 430.418053][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.418074][ C1] ? bch2_copygc+0x392f/0x3cf0 [ 430.418098][ C1] bch2_copygc+0x281/0x3cf0 [ 430.418120][ C1] ? bch2_copygc+0x3c0/0x3cf0 [ 430.418141][ C1] ? __lock_acquire+0xaac/0xd20 [ 430.418171][ C1] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 430.418192][ C1] ? __pfx_bch2_copygc+0x10/0x10 [ 430.418211][ C1] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 430.418231][ C1] ? bch2_copygc_wait_amount+0xb4e/0xbb0 [ 430.418252][ C1] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 430.418276][ C1] ? __pfx_bch2_copygc_wait_amount+0x10/0x10 [ 430.418295][ C1] ? do_raw_spin_lock+0x121/0x290 [ 430.418334][ C1] bch2_copygc_thread+0x8c9/0xd40 [ 430.418355][ C1] ? bch2_copygc_thread+0x17b/0xd40 [ 430.418384][ C1] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.418405][ C1] ? bch2_copygc_thread+0x3dd/0xd40 [ 430.418445][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 430.418462][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.418486][ C1] ? __kthread_parkme+0x7b/0x200 [ 430.418501][ C1] ? __kthread_parkme+0x1a1/0x200 [ 430.418519][ C1] kthread+0x70e/0x8a0 [ 430.418537][ C1] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.418558][ C1] ? __pfx_kthread+0x10/0x10 [ 430.418575][ C1] ? __pfx_kthread+0x10/0x10 [ 430.418591][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.418607][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.418624][ C1] ? __pfx_kthread+0x10/0x10 [ 430.418640][ C1] ret_from_fork+0x4b/0x80 [ 430.418654][ C1] ? __pfx_kthread+0x10/0x10 [ 430.418671][ C1] ret_from_fork_asm+0x1a/0x30 [ 430.418703][ C1] [ 430.418710][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.364 msecs [ 430.419482][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.839091][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc5-syzkaller-00136-g9c69f8884904 #0 PREEMPT(full) [ 430.850895][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 [ 430.860951][ T31] Call Trace: [ 430.864235][ T31] [ 430.867175][ T31] dump_stack_lvl+0x99/0x250 [ 430.871778][ T31] ? __asan_memcpy+0x40/0x70 [ 430.876379][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.881586][ T31] ? __pfx__printk+0x10/0x10 [ 430.886198][ T31] panic+0x2db/0x790 [ 430.890108][ T31] ? __pfx_panic+0x10/0x10 [ 430.894533][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.900346][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.905721][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 430.911891][ T31] watchdog+0x102d/0x1030 [ 430.916228][ T31] ? watchdog+0x1de/0x1030 [ 430.920660][ T31] kthread+0x70e/0x8a0 [ 430.924734][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.929416][ T31] ? __pfx_kthread+0x10/0x10 [ 430.934012][ T31] ? __pfx_kthread+0x10/0x10 [ 430.938604][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.943802][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.949378][ T31] ? __pfx_kthread+0x10/0x10 [ 430.953986][ T31] ret_from_fork+0x4b/0x80 [ 430.958410][ T31] ? __pfx_kthread+0x10/0x10 [ 430.963007][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.967801][ T31] [ 430.971138][ T31] Kernel Offset: disabled [ 430.975472][ T31] Rebooting in 86400 seconds..