./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2533112761 <...> Warning: Permanently added '10.128.10.56' (ED25519) to the list of known hosts. execve("./syz-executor2533112761", ["./syz-executor2533112761"], 0x7ffc4a5be600 /* 10 vars */) = 0 brk(NULL) = 0x5555577c4000 brk(0x5555577c4d00) = 0x5555577c4d00 arch_prctl(ARCH_SET_FS, 0x5555577c4380) = 0 set_tid_address(0x5555577c4650) = 5820 set_robust_list(0x5555577c4660, 24) = 0 rseq(0x5555577c4ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2533112761", 4096) = 28 getrandom("\xaa\x17\xe8\x5c\x52\xb4\x04\x88", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555577c4d00 brk(0x5555577e5d00) = 0x5555577e5d00 brk(0x5555577e6000) = 0x5555577e6000 mprotect(0x7f44473a1000, 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 5821 attached , child_tidptr=0x5555577c4650) = 5821 [pid 5821] set_robust_list(0x5555577c4660, 24) = 0 [pid 5821] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5821] setpgid(0, 0) = 0 [pid 5821] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1000", 4) = 4 [pid 5821] close(3) = 0 executing program [pid 5821] write(1, "executing program\n", 18) = 18 [pid 5821] memfd_create("syzkaller", 0) = 3 [pid 5821] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f443ee00000 [pid 5821] 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 5821] munmap(0x7f443ee00000, 138412032) = 0 [pid 5821] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5821] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5821] close(3) = 0 [pid 5821] close(4) = 0 [pid 5821] mkdir("./file0", 0777) = 0 [ 91.127959][ T5821] loop0: detected capacity change from 0 to 32768 [ 91.217238][ T5821] 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 [ 91.217238][ T5821] allowing incompatible features above 0.0: (unknown version) [ 91.244828][ T5821] bcachefs (loop0): recovering from clean shutdown, journal seq 13 [ 91.267547][ T5821] bcachefs (loop0): accounting_read... done [ 91.274955][ T5821] bcachefs (loop0): alloc_read... done [ 91.280884][ T5821] bcachefs (loop0): snapshots_read... done [ 91.289812][ T5821] bcachefs (loop0): going read-write [ 91.300563][ T5821] bcachefs (loop0): journal_replay... done [ 91.306468][ T5821] bcachefs (loop0): resume_logged_ops... done [ 91.315513][ T5831] bcachefs (loop0): backpointer doesn't match extent it points to: [ 91.315531][ T5831] 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 [ 91.315543][ T5831] 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 [ 91.315556][ T5831] 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 [ 91.317790][ T5821] bcachefs (loop0): delete_dead_inodes... done [ 91.391500][ T5821] bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean [ 91.401152][ T5821] bcachefs (loop0): resume_logged_ops... done [ 91.407479][ T5821] bcachefs (loop0): delete_dead_inodes... done [pid 5821] mount("/dev/loop0", "./file0", "bcachefs", 0, "version_upgrade=none,background_compression=lz4,") = 0 [pid 5821] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5821] chdir("./file0") = 0 [pid 5821] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 91.414685][ T5821] bcachefs (loop0): done starting filesystem [pid 5821] ioctl(4, LOOP_CLR_FD) = 0 [pid 5821] close(4) = 0 [ 92.039854][ T59] cfg80211: failed to load regulatory.db [pid 5821] openat(AT_FDCWD, "pids.current", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000 [pid 5820] kill(-5821, SIGKILL) = 0 [pid 5820] kill(5821, SIGKILL) = 0 [pid 5820] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5820] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5820] getdents64(3, 0x5555577c56f0 /* 2 entries */, 32768) = 48 [pid 5820] getdents64(3, 0x5555577c56f0 /* 0 entries */, 32768) = 0 [pid 5820] close(3) = 0 [ 122.128985][ T5821] Allocator stuck? Waited for 30 seconds [ 122.129013][ T5821] Allocator debug: [ 122.129024][ T5821] capacity1536 [ 122.129035][ T5821] reserved 31232 [ 122.129046][ T5821] hidden 0 [ 122.129056][ T5821] btree 0 [ 122.129067][ T5821] data 0 [ 122.129077][ T5821] cached 0 [ 122.129087][ T5821] reserved 0 [ 122.129097][ T5821] online_reserved 768 [ 122.129107][ T5821] nr_inodes 0 [ 122.129117][ T5821] [ 122.129126][ T5821] freelist_wait waiting [ 122.129136][ T5821] open buckets allocated1 [ 122.129146][ T5821] open buckets total 1024 [ 122.129156][ T5821] open_buckets_wait empty [ 122.129166][ T5821] open_buckets_btree 0 [ 122.129176][ T5821] open_buckets_user 0 [ 122.129186][ T5821] btree reserve cache 0 [ 122.129195][ T5821] [ 122.129204][ T5821] Dev 0: [ 122.129213][ T5821] buckets sectors fragmented [ 122.129225][ T5821] free 0 0 0 [ 122.129236][ T5821] sb 0 0 0 [ 122.129248][ T5821] journal 0 0 0 [ 122.129260][ T5821] btree 0 0 0 [ 122.129272][ T5821] user 0 0 0 [ 122.129284][ T5821] cached 0 0 0 [ 122.129295][ T5821] parity 0 0 0 [ 122.129307][ T5821] stripe 0 0 0 [ 122.129319][ T5821] need_gc_gens 0 0 0 [ 122.129331][ T5821] need_discard 0 0 0 [ 122.129342][ T5821] unstriped 0 0 0 [ 122.129354][ T5821] capacity 128 [ 122.129363][ T5821] [ 122.129372][ T5821] reserves: [ 122.129382][ T5821] stripe 60 [ 122.129392][ T5821] normal 58 [ 122.129402][ T5821] copygc 56 [ 122.129412][ T5821] btree 28 [ 122.129422][ T5821] btree_copygc 0 [ 122.129432][ T5821] reclaim 0 [ 122.129442][ T5821] interior_updates 0 [ 122.129452][ T5821] [ 122.129461][ T5821] open buckets 0 [ 122.129471][ T5821] buckets to invalidate 0 [ 122.129481][ T5821] [ 122.129495][ T5821] Copygc debug: [ 122.129504][ T5821] running: 1 [ 122.129518][ T5821] copygc_wait:0 [ 122.129527][ T5821] copygc_wait_at:0 [ 122.129536][ T5821] Currently waiting for:0 B [ 122.129545][ T5821] Currently waiting since:640 KiB [ 122.129554][ T5821] Currently calculated wait:0 B [ 122.129564][ T5821] [ 122.129573][ T5821] Journal debug: [ 122.129582][ T5821] flags: replay_done,running,may_skip_flush [ 122.129594][ T5821] dirty journal entries: 0/32768 [ 122.129604][ T5821] seq: 16 [ 122.129614][ T5821] seq_ondisk: 16 [ 122.129624][ T5821] last_seq: 17 [ 122.129634][ T5821] last_seq_ondisk: 16 [ 122.129645][ T5821] flushed_seq_ondisk: 16 [ 122.129655][ T5821] watermark: stripe [ 122.129665][ T5821] each entry reserved: 321 [ 122.129675][ T5821] nr flush writes: 2 [ 122.129685][ T5821] nr noflush writes: 1 [ 122.129695][ T5821] average write size: 1.20 KiB [ 122.129705][ T5821] free buf: 65536 [ 122.129715][ T5821] nr direct reclaim: 0 [ 122.129725][ T5821] nr background reclaim: 0 [ 122.129733][ T5821] reclaim kicked: 0 [ 122.129743][ T5821] reclaim runs in: 0 ms [ 122.129753][ T5821] blocked: 0 [ 122.129762][ T5821] current entry sectors: 256 [ 122.129772][ T5821] current entry error: (No error) [ 122.129791][ T5821] current entry: closed [ 122.129802][ T5821] unwritten entries: [ 122.129811][ T5821] last buf closed [ 122.129821][ T5821] space: [ 122.129831][ T5821] discarded 256:1536 [ 122.129841][ T5821] clean ondisk 256:1536 [ 122.129852][ T5821] clean 256:1536 [ 122.129862][ T5821] total 256:2048 [ 122.129873][ T5821] dev 0: [ 122.129882][ T5821] durability 1: [ 122.129891][ T5821] nr 8 [ 122.129901][ T5821] bucket size 256 [ 122.129911][ T5821] available 6:232 [ 122.129922][ T5821] discard_idx 0 [ 122.129932][ T5821] dirty_ondisk 0 (seq 16) [ 122.129943][ T5821] dirty_idx 0 (seq 16) [ 122.129954][ T5821] cur_idx 0 (seq 16) [ 122.129964][ T5821] replicas want 1 need 1 [ 286.599896][ T31] INFO: task syz-executor253:5821 blocked for more than 143 seconds. [ 286.608189][ T31] Not tainted 6.15.0-rc3-syzkaller-00342-g5bc1018675ec #0 [ 286.615867][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.625470][ T31] task:syz-executor253 state:D stack:21192 pid:5821 tgid:5821 ppid:5820 task_flags:0x400140 flags:0x00004006 [ 286.638221][ T31] Call Trace: [ 286.641562][ T31] [ 286.644629][ T31] __schedule+0x168f/0x4c70 [ 286.650337][ T31] ? schedule+0x165/0x360 [ 286.654745][ T31] ? __pfx___schedule+0x10/0x10 [ 286.660685][ T31] ? schedule+0x91/0x360 [ 286.665005][ T31] schedule+0x165/0x360 [ 286.669841][ T31] ? __closure_sync+0x113/0x220 [ 286.674762][ T31] __closure_sync+0x163/0x220 [ 286.680029][ T31] ? __pfx___closure_sync+0x10/0x10 [ 286.685297][ T31] ? __bch2_wait_on_allocator+0x1c7/0x240 [ 286.691779][ T31] bch2_btree_update_start+0x1193/0x14c0 [ 286.697497][ T31] ? bch2_btree_split_leaf+0x13c/0x8f0 [ 286.703553][ T31] ? __pfx_bch2_btree_update_start+0x10/0x10 [ 286.710032][ T31] ? stack_depot_save_flags+0x42b/0x910 [ 286.716279][ T31] ? __pfx_closure_sync_fn+0x10/0x10 [ 286.722713][ T31] ? bch2_create+0x66/0xd0 [ 286.727289][ T31] ? path_openat+0x14f1/0x3830 [ 286.732699][ T31] ? do_filp_open+0x1fa/0x410 [ 286.737452][ T31] ? do_sys_openat2+0x121/0x1c0 [ 286.742920][ T31] ? __x64_sys_openat+0x138/0x170 [ 286.748564][ T31] ? do_syscall_64+0xf6/0x210 [ 286.753316][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.760541][ T31] bch2_btree_split_leaf+0x13c/0x8f0 [ 286.765918][ T31] bch2_trans_commit_error+0x1a8/0x1100 [ 286.772178][ T31] ? __bch2_create+0x887/0xb90 [ 286.777016][ T31] ? six_unlock_ip+0x302/0x430 [ 286.782497][ T31] ? __pfx_bch2_trans_commit_error+0x10/0x10 [ 286.788934][ T31] ? bch2_trans_verify_locks+0x31e/0x3c0 [ 286.794632][ T31] __bch2_trans_commit+0x779c/0x8ae0 [ 286.800579][ T31] ? __bch2_create+0x887/0xb90 [ 286.805398][ T31] ? __bch2_bkey_get_val_typed+0x279/0x390 [ 286.811800][ T31] ? __pfx___bch2_trans_commit+0x10/0x10 [ 286.817502][ T31] ? __bch2_bkey_get_val_typed+0x121/0x390 [ 286.823919][ T31] ? __pfx_bch2_subvol_is_ro_trans+0x10/0x10 [ 286.830530][ T31] ? from_kgid+0x1b0/0x650 [ 286.835016][ T31] ? bch2_subvolume_get+0x65/0x100 [ 286.840600][ T31] ? bch2_subvolume_get+0x7d/0x100 [ 286.845784][ T31] __bch2_create+0x887/0xb90 [ 286.851018][ T31] ? __pfx___bch2_create+0x10/0x10 [ 286.856243][ T31] ? smk_tskacc+0x2fc/0x370 [ 286.861309][ T31] ? smack_inode_permission+0x28f/0x320 [ 286.867015][ T31] ? tomoyo_path_mknod+0x142/0x190 [ 286.873254][ T31] ? generic_permission+0x2e5/0x690 [ 286.879070][ T31] bch2_create+0x66/0xd0 [ 286.883383][ T31] ? __pfx_bch2_create+0x10/0x10 [ 286.888943][ T31] path_openat+0x14f1/0x3830 [ 286.893641][ T31] ? arch_stack_walk+0xfc/0x150 [ 286.899210][ T31] ? __pfx_path_openat+0x10/0x10 [ 286.904203][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.910916][ T31] do_filp_open+0x1fa/0x410 [ 286.915489][ T31] ? __pfx_do_filp_open+0x10/0x10 [ 286.921169][ T31] ? _raw_spin_unlock+0x28/0x50 [ 286.926077][ T31] ? alloc_fd+0x64c/0x6c0 [ 286.931006][ T31] do_sys_openat2+0x121/0x1c0 [ 286.935750][ T31] ? __pfx_do_sys_openat2+0x10/0x10 [ 286.941384][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.946207][ T31] __x64_sys_openat+0x138/0x170 [ 286.952380][ T31] do_syscall_64+0xf6/0x210 [ 286.957085][ T31] ? clear_bhb_loop+0x45/0xa0 [ 286.962357][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.968701][ T31] RIP: 0033:0x7f444731eb59 [ 286.973203][ T31] RSP: 002b:00007ffd25e3c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 286.982845][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f444731eb59 [ 286.991294][ T31] RDX: 000000000000275a RSI: 00002000000000c0 RDI: 00000000ffffff9c [ 286.999952][ T31] RBP: 00007f44473a15f0 R08: 000000000000f624 R09: 00005555577c54c0 [ 287.008492][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd25e3c240 [ 287.016524][ T31] R13: 00007ffd25e3c468 R14: 431bde82d7b634db R15: 00007f444736703b [ 287.025141][ T31] [ 287.028759][ T31] [ 287.028759][ T31] Showing all locks held in the system: [ 287.036534][ T31] 1 lock held by khungtaskd/31: [ 287.042172][ T31] #0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.052661][ T31] 2 locks held by getty/5577: [ 287.057427][ T31] #0: ffff8880307bc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.067847][ T31] #1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.078522][ T31] 5 locks held by syz-executor253/5821: [ 287.084131][ T31] #0: ffff88803004a420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 287.094407][ T31] #1: ffff888074928148 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: path_openat+0x8da/0x3830 [ 287.105362][ T31] #2: ffff888074928530 (&inode->ei_update_lock){+.+.}-{4:4}, at: __bch2_create+0x2f2/0xb90 [ 287.116037][ T31] #3: ffff888079d04228 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x806/0xda0 [ 287.127096][ T31] #4: ffff888079d26590 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x68f/0x14c0 [ 287.137885][ T31] 1 lock held by bch-copygc/loop/5831: [ 287.143404][ T31] [ 287.145778][ T31] ============================================= [ 287.145778][ T31] [ 287.155051][ T31] NMI backtrace for cpu 1 [ 287.155079][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00342-g5bc1018675ec #0 PREEMPT(full) [ 287.155103][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 287.155115][ T31] Call Trace: [ 287.155123][ T31] [ 287.155132][ T31] dump_stack_lvl+0x189/0x250 [ 287.155163][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.155188][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.155214][ T31] ? __pfx__printk+0x10/0x10 [ 287.155257][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.155288][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.155312][ T31] ? _printk+0xcf/0x120 [ 287.155346][ T31] ? __pfx__printk+0x10/0x10 [ 287.155379][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.155413][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.155444][ T31] watchdog+0xfee/0x1030 [ 287.155468][ T31] ? watchdog+0x1de/0x1030 [ 287.155499][ T31] kthread+0x70e/0x8a0 [ 287.155524][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.155546][ T31] ? __pfx_kthread+0x10/0x10 [ 287.155568][ T31] ? __pfx_kthread+0x10/0x10 [ 287.155588][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.155618][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.155649][ T31] ? __pfx_kthread+0x10/0x10 [ 287.155669][ T31] ret_from_fork+0x4b/0x80 [ 287.155686][ T31] ? __pfx_kthread+0x10/0x10 [ 287.155707][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.155757][ T31] [ 287.155777][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.304155][ C0] NMI backtrace for cpu 0 [ 287.304173][ C0] CPU: 0 UID: 0 PID: 5831 Comm: bch-copygc/loop Not tainted 6.15.0-rc3-syzkaller-00342-g5bc1018675ec #0 PREEMPT(full) [ 287.304194][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 287.304205][ C0] RIP: 0010:unwind_next_frame+0x214/0x2390 [ 287.304229][ C0] Code: ef 08 8b 15 be e5 23 0c 8d 42 ff 44 39 f8 0f 86 65 18 00 00 44 89 f8 4c 8d 2c 85 54 33 b6 90 4c 89 e8 48 c1 e8 03 0f b6 04 28 <84> c0 48 89 eb 0f 85 1c 1c 00 00 45 8b 6d 00 44 89 f8 ff c0 48 8d [ 287.304244][ C0] RSP: 0018:ffffc900041cf0b8 EFLAGS: 00000a06 [ 287.304259][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: cb9867d05cff2b00 [ 287.304278][ C0] RDX: 00000000000a524b RSI: ffffffff8bc0fa40 RDI: ffffffff8bc0fa00 [ 287.304290][ C0] RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 [ 287.304301][ C0] R10: 0000000000000000 R11: ffffffff817199f5 R12: ffffffff8166f9aa [ 287.304312][ C0] R13: ffffffff90b7cf38 R14: ffffc900041cf188 R15: 00000000000066f9 [ 287.304324][ C0] FS: 0000000000000000(0000) GS:ffff888126102000(0000) knlGS:0000000000000000 [ 287.304337][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.304348][ C0] CR2: 00007ffee1ed2288 CR3: 000000000dd36000 CR4: 00000000003526f0 [ 287.304363][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.304373][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.304383][ C0] Call Trace: [ 287.304389][ C0] [ 287.304400][ C0] ? unwind_next_frame+0xa5/0x2390 [ 287.304419][ C0] ? ret_from_fork+0x4b/0x80 [ 287.304437][ C0] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 287.304454][ C0] arch_stack_walk+0x11c/0x150 [ 287.304477][ C0] ? ret_from_fork+0x4b/0x80 [ 287.304494][ C0] stack_trace_save+0x9c/0xe0 [ 287.304509][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 287.304524][ C0] ? irq_work_queue+0xdb/0x140 [ 287.304547][ C0] __kfence_alloc+0x2b2/0x3b0 [ 287.304570][ C0] ? __pfx___kfence_alloc+0x10/0x10 [ 287.304590][ C0] ? __kfence_alloc+0x2b2/0x3b0 [ 287.304610][ C0] ? __kvmalloc_node_noprof+0x52f/0x5e0 [ 287.304634][ C0] ? __bch2_darray_resize_noprof+0xd7/0x290 [ 287.304653][ C0] ? bch2_copygc+0x1c01/0x3cf0 [ 287.304672][ C0] ? bch2_copygc_thread+0x8c9/0xd40 [ 287.304691][ C0] ? kthread+0x70e/0x8a0 [ 287.304706][ C0] ? ret_from_fork+0x4b/0x80 [ 287.304749][ C0] ? fs_reclaim_acquire+0x7d/0x100 [ 287.304768][ C0] ? __bch2_darray_resize_noprof+0xd7/0x290 [ 287.304785][ C0] __kvmalloc_node_noprof+0x52f/0x5e0 [ 287.304809][ C0] ? __bch2_darray_resize_noprof+0xd7/0x290 [ 287.304830][ C0] __bch2_darray_resize_noprof+0xd7/0x290 [ 287.304851][ C0] bch2_copygc+0x1c01/0x3cf0 [ 287.304872][ C0] ? bch2_copygc+0x3c0/0x3cf0 [ 287.304906][ C0] ? __pfx_bch2_copygc+0x10/0x10 [ 287.304924][ C0] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 287.304944][ C0] ? bch2_copygc_wait_amount+0xb4e/0xbb0 [ 287.304964][ C0] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 287.304989][ C0] ? bch2_copygc+0x3c0/0x3cf0 [ 287.305018][ C0] ? bch2_copygc+0x3c0/0x3cf0 [ 287.305046][ C0] bch2_copygc_thread+0x8c9/0xd40 [ 287.305066][ C0] ? bch2_copygc_thread+0x17b/0xd40 [ 287.305096][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 287.305116][ C0] ? bch2_copygc_thread+0x3dd/0xd40 [ 287.305156][ C0] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 287.305181][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.305214][ C0] ? __kthread_parkme+0x7b/0x200 [ 287.305240][ C0] ? __kthread_parkme+0x1a1/0x200 [ 287.305275][ C0] kthread+0x70e/0x8a0 [ 287.305293][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 287.305313][ C0] ? __pfx_kthread+0x10/0x10 [ 287.305330][ C0] ? __pfx_kthread+0x10/0x10 [ 287.305346][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.305369][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.305394][ C0] ? __pfx_kthread+0x10/0x10 [ 287.305410][ C0] ret_from_fork+0x4b/0x80 [ 287.305425][ C0] ? __pfx_kthread+0x10/0x10 [ 287.305442][ C0] ret_from_fork_asm+0x1a/0x30 [ 287.305476][ C0] [ 287.305483][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.330 msecs [ 287.306167][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.714433][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00342-g5bc1018675ec #0 PREEMPT(full) [ 287.726421][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 287.736486][ T31] Call Trace: [ 287.739779][ T31] [ 287.742721][ T31] dump_stack_lvl+0x99/0x250 [ 287.747328][ T31] ? __asan_memcpy+0x40/0x70 [ 287.751932][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.757145][ T31] ? __pfx__printk+0x10/0x10 [ 287.761999][ T31] panic+0x2db/0x790 [ 287.765916][ T31] ? __pfx_panic+0x10/0x10 [ 287.770351][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.776173][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.781559][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.787865][ T31] watchdog+0x102d/0x1030 [ 287.792232][ T31] ? watchdog+0x1de/0x1030 [ 287.796697][ T31] kthread+0x70e/0x8a0 [ 287.800781][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.805505][ T31] ? __pfx_kthread+0x10/0x10 [ 287.810125][ T31] ? __pfx_kthread+0x10/0x10 [ 287.814729][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.820034][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.825259][ T31] ? __pfx_kthread+0x10/0x10 [ 287.829863][ T31] ret_from_fork+0x4b/0x80 [ 287.834287][ T31] ? __pfx_kthread+0x10/0x10 [ 287.838887][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.843708][ T31] [ 287.847108][ T31] Kernel Offset: disabled [ 287.851477][ T31] Rebooting in 86400 seconds..