./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1318887244 <...> Warning: Permanently added '10.128.0.17' (ED25519) to the list of known hosts. execve("./syz-executor1318887244", ["./syz-executor1318887244"], 0x7ffdb134c9b0 /* 10 vars */) = 0 brk(NULL) = 0x5555563e3000 brk(0x5555563e3d00) = 0x5555563e3d00 arch_prctl(ARCH_SET_FS, 0x5555563e3380) = 0 set_tid_address(0x5555563e3650) = 5815 set_robust_list(0x5555563e3660, 24) = 0 rseq(0x5555563e3ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1318887244", 4096) = 28 getrandom("\xa6\xe0\xb2\xa7\x06\x23\x6f\x62", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555563e3d00 brk(0x555556404d00) = 0x555556404d00 brk(0x555556405000) = 0x555556405000 mprotect(0x7f56253ba000, 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 5817 attached [pid 5817] set_robust_list(0x5555563e3660, 24 [pid 5815] <... clone resumed>, child_tidptr=0x5555563e3650) = 5817 [pid 5817] <... set_robust_list resumed>) = 0 [pid 5817] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5817] setpgid(0, 0) = 0 [pid 5817] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5817] write(3, "1000", 4) = 4 [pid 5817] close(3) = 0 executing program [pid 5817] write(1, "executing program\n", 18) = 18 [pid 5817] memfd_create("syzkaller", 0) = 3 [pid 5817] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f561ce00000 [pid 5817] 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 5817] munmap(0x7f561ce00000, 138412032) = 0 [pid 5817] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5817] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5817] close(3) = 0 [pid 5817] close(4) = 0 syzkaller login: [ 70.222276][ T5817] loop0: detected capacity change from 0 to 32768 [pid 5817] mkdir("./file0", 0777) = 0 [ 70.333960][ T5817] 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 [ 70.333960][ T5817] allowing incompatible features above 0.0: (unknown version) [ 70.361083][ T5817] bcachefs (loop0): recovering from clean shutdown, journal seq 13 [ 70.379580][ T5817] bcachefs (loop0): accounting_read... done [ 70.386292][ T5817] bcachefs (loop0): alloc_read... done [ 70.391875][ T5817] bcachefs (loop0): snapshots_read... done [ 70.399762][ T5817] bcachefs (loop0): going read-write [ 70.409284][ T5817] bcachefs (loop0): journal_replay... done [ 70.415187][ T5817] bcachefs (loop0): resume_logged_ops... done [ 70.421548][ T5817] bcachefs (loop0): delete_dead_inodes... done [ 70.428460][ T5826] bcachefs (loop0): backpointer doesn't match extent it points to: [ 70.428520][ T5826] 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 [ 70.428532][ T5826] 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 [pid 5817] mount("/dev/loop0", "./file0", "bcachefs", 0, "version_upgrade=none,background_compression=lz4,") = 0 [pid 5817] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5817] chdir("./file0") = 0 [pid 5817] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5817] ioctl(4, LOOP_CLR_FD) = 0 [pid 5817] close(4) = 0 [ 70.428543][ T5826] 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 [ 70.488228][ T5817] bcachefs (loop0): done starting filesystem [pid 5817] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC|O_NOATIME|FASYNC, 000) = 4 [pid 5817] pwrite64(4, "c", 1, 28828) = 1 [pid 5817] write(4, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00", 24 [pid 5815] kill(-5817, SIGKILL) = 0 [pid 5815] kill(5817, SIGKILL) = 0 [pid 5815] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5815] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5815] getdents64(3, 0x5555563e46f0 /* 2 entries */, 32768) = 48 [pid 5815] getdents64(3, 0x5555563e46f0 /* 0 entries */, 32768) = 0 [pid 5815] close(3) = 0 [ 81.564900][ T9] cfg80211: failed to load regulatory.db [ 132.133408][ T5817] Allocator stuck? Waited for 30 seconds [ 132.133456][ T5817] Allocator debug: [ 132.133465][ T5817] capacity1536 [ 132.133472][ T5817] reserved 31232 [ 132.133480][ T5817] hidden 0 [ 132.133487][ T5817] btree 0 [ 132.133495][ T5817] data 0 [ 132.133502][ T5817] cached 0 [ 132.133510][ T5817] reserved 0 [ 132.133517][ T5817] online_reserved 8 [ 132.133525][ T5817] nr_inodes 0 [ 132.133532][ T5817] [ 132.133539][ T5817] freelist_wait waiting [ 132.133546][ T5817] open buckets allocated1 [ 132.133552][ T5817] open buckets total 1024 [ 132.133559][ T5817] open_buckets_wait empty [ 132.133567][ T5817] open_buckets_btree 0 [ 132.133574][ T5817] open_buckets_user 0 [ 132.133581][ T5817] btree reserve cache 0 [ 132.133588][ T5817] [ 132.133595][ T5817] Dev 0: [ 132.133602][ T5817] buckets sectors fragmented [ 132.133611][ T5817] free 0 0 0 [ 132.133619][ T5817] sb 0 0 0 [ 132.133628][ T5817] journal 0 0 0 [ 132.133637][ T5817] btree 0 0 0 [ 132.133646][ T5817] user 0 0 0 [ 132.133661][ T5817] cached 0 0 0 [ 132.133670][ T5817] parity 0 0 0 [ 132.133678][ T5817] stripe 0 0 0 [ 132.133687][ T5817] need_gc_gens 0 0 0 [ 132.133696][ T5817] need_discard 0 0 0 [ 132.133704][ T5817] unstriped 0 0 0 [ 132.133713][ T5817] capacity 128 [ 132.133721][ T5817] [ 132.133727][ T5817] reserves: [ 132.133734][ T5817] stripe 60 [ 132.133742][ T5817] normal 58 [ 132.133750][ T5817] copygc 56 [ 132.133757][ T5817] btree 28 [ 132.133765][ T5817] btree_copygc 0 [ 132.133772][ T5817] reclaim 0 [ 132.133780][ T5817] interior_updates 0 [ 132.133787][ T5817] [ 132.133794][ T5817] open buckets 0 [ 132.133802][ T5817] buckets to invalidate 0 [ 132.133809][ T5817] [ 132.133816][ T5817] Copygc debug: [ 132.133823][ T5817] running: 1 [ 132.133830][ T5817] copygc_wait:0 [ 132.133837][ T5817] copygc_wait_at:0 [ 132.133844][ T5817] Currently waiting for:0 B [ 132.133852][ T5817] Currently waiting since:640 KiB [ 132.133860][ T5817] Currently calculated wait:0 B [ 132.133867][ T5817] [ 132.133874][ T5817] Journal debug: [ 132.133881][ T5817] flags: replay_done,running,may_skip_flush [ 132.133890][ T5817] dirty journal entries: 0/32768 [ 132.133897][ T5817] seq: 16 [ 132.133905][ T5817] seq_ondisk: 16 [ 132.133912][ T5817] last_seq: 17 [ 132.133920][ T5817] last_seq_ondisk: 16 [ 132.133927][ T5817] flushed_seq_ondisk: 16 [ 132.133935][ T5817] watermark: stripe [ 132.133943][ T5817] each entry reserved: 321 [ 132.133951][ T5817] nr flush writes: 3 [ 132.133958][ T5817] nr noflush writes: 0 [ 132.133966][ T5817] average write size: 1.41 KiB [ 132.133974][ T5817] free buf: 65536 [ 132.133981][ T5817] nr direct reclaim: 0 [ 132.133989][ T5817] nr background reclaim: 6 [ 132.133996][ T5817] reclaim kicked: 0 [ 132.134004][ T5817] reclaim runs in: 0 ms [ 132.134012][ T5817] blocked: 0 [ 132.134020][ T5817] current entry sectors: 256 [ 132.134027][ T5817] current entry error: (No error) [ 132.134035][ T5817] current entry: closed [ 132.134043][ T5817] unwritten entries: [ 132.134050][ T5817] last buf closed [ 132.134057][ T5817] space: [ 132.134064][ T5817] discarded 256:1536 [ 132.134072][ T5817] clean ondisk 256:1536 [ 132.134080][ T5817] clean 256:1536 [ 132.134087][ T5817] total 256:2048 [ 132.134095][ T5817] dev 0: [ 132.134102][ T5817] durability 1: [ 132.134109][ T5817] nr 8 [ 132.134117][ T5817] bucket size 256 [ 132.134124][ T5817] available 6:232 [ 132.134132][ T5817] discard_idx 0 [ 132.134140][ T5817] dirty_ondisk 0 (seq 16) [ 132.134148][ T5817] dirty_idx 0 (seq 16) [ 132.134156][ T5817] cur_idx 0 (seq 16) [ 132.134164][ T5817] replicas want 1 need 1 [ 286.363966][ T31] INFO: task syz-executor131:5817 blocked for more than 143 seconds. [ 286.372162][ T31] Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 [ 286.380738][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.390200][ T31] task:syz-executor131 state:D stack:19816 pid:5817 tgid:5817 ppid:5815 task_flags:0x440140 flags:0x00004006 [ 286.402525][ T31] Call Trace: [ 286.405827][ T31] [ 286.408783][ T31] __schedule+0x168f/0x4c70 [ 286.413947][ T31] ? blk_mq_flush_plug_list+0x10e/0x1760 [ 286.419626][ T31] ? __pfx_blk_mq_flush_plug_list+0x10/0x10 [ 286.425973][ T31] ? schedule+0x165/0x360 [ 286.430339][ T31] ? __pfx___schedule+0x10/0x10 [ 286.435640][ T31] ? schedule+0x91/0x360 [ 286.439918][ T31] schedule+0x165/0x360 [ 286.444588][ T31] ? __closure_sync+0x113/0x220 [ 286.449481][ T31] __closure_sync+0x163/0x220 [ 286.454616][ T31] ? __pfx___closure_sync+0x10/0x10 [ 286.459850][ T31] ? __bch2_wait_on_allocator+0x1c7/0x240 [ 286.466048][ T31] __bch2_write+0x324b/0x39b0 [ 286.470765][ T31] ? __lock_acquire+0xaac/0xd20 [ 286.476146][ T31] ? filemap_get_folios_tag+0x53b/0x630 [ 286.481731][ T31] ? __pfx_filemap_get_folios_tag+0x10/0x10 [ 286.488110][ T31] ? __pfx___bch2_write+0x10/0x10 [ 286.493861][ T31] ? mlock_drain_local+0x79/0x490 [ 286.498931][ T31] ? mlock_drain_local+0x79/0x490 [ 286.504418][ T31] ? mlock_drain_local+0x28e/0x490 [ 286.509569][ T31] ? bch2_write+0x7d7/0x11e0 [ 286.514677][ T31] ? write_cache_pages+0xc1/0x100 [ 286.519747][ T31] bch2_writepages+0x269/0x360 [ 286.525218][ T31] ? __lock_acquire+0xaac/0xd20 [ 286.530118][ T31] ? __pfx_bch2_writepages+0x10/0x10 [ 286.535991][ T31] ? is_bpf_text_address+0x26/0x2b0 [ 286.541230][ T31] ? __pfx_bch2_writepages+0x10/0x10 [ 286.546941][ T31] do_writepages+0x3ae/0x7b0 [ 286.551579][ T31] ? do_raw_spin_lock+0x121/0x290 [ 286.557416][ T31] ? __pfx_do_writepages+0x10/0x10 [ 286.562902][ T31] ? do_raw_spin_unlock+0x122/0x240 [ 286.568137][ T31] file_write_and_wait_range+0x22c/0x330 [ 286.574277][ T31] ? __pfx_file_write_and_wait_range+0x10/0x10 [ 286.580467][ T31] ? vfs_write+0x548/0xa90 [ 286.585285][ T31] bch2_fsync+0x127/0x330 [ 286.589671][ T31] bch2_write_iter+0x2822/0x2b90 [ 286.595161][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.600424][ T31] ? __pfx_bch2_write_iter+0x10/0x10 [ 286.606521][ T31] ? rcu_read_lock_any_held+0xb3/0x120 [ 286.612033][ T31] vfs_write+0x548/0xa90 [ 286.616799][ T31] ? __pfx_bch2_write_iter+0x10/0x10 [ 286.622109][ T31] ? __pfx_vfs_write+0x10/0x10 [ 286.627314][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.632876][ T31] ? ptrace_notify+0x22d/0x2c0 [ 286.637686][ T31] ksys_write+0x145/0x250 [ 286.642035][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.647413][ T31] ? __pfx_ksys_write+0x10/0x10 [ 286.652304][ T31] do_syscall_64+0xf6/0x210 [ 286.657322][ T31] ? clear_bhb_loop+0x45/0xa0 [ 286.662041][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.668452][ T31] RIP: 0033:0x7f5625337b99 [ 286.673250][ T31] RSP: 002b:00007ffd37935378 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 286.681692][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5625337b99 [ 286.690153][ T31] RDX: 0000000000000018 RSI: 0000200000000040 RDI: 0000000000000004 [ 286.698507][ T31] RBP: 00007f56253ba5f0 R08: 00005555563e44c0 R09: 00005555563e44c0 [ 286.706846][ T31] R10: 00005555563e44c0 R11: 0000000000000246 R12: 00007ffd379353a0 [ 286.715582][ T31] R13: 00007ffd379355c8 R14: 431bde82d7b634db R15: 00007f562538003b [ 286.723917][ T31] [ 286.727031][ T31] [ 286.727031][ T31] Showing all locks held in the system: [ 286.735389][ T31] 1 lock held by khungtaskd/31: [ 286.740262][ T31] #0: ffffffff8df3b860 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.750630][ T31] 2 locks held by getty/5574: [ 286.755633][ T31] #0: ffff8880324b80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.765760][ T31] #1: ffffc90002ffe2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.776245][ T31] 1 lock held by syz-executor131/5817: [ 286.781717][ T31] #0: ffff888047c3e420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x211/0xa90 [ 286.791105][ T31] 3 locks held by bch-copygc/loop/5826: [ 286.796995][ T31] [ 286.799335][ T31] ============================================= [ 286.799335][ T31] [ 286.808350][ T31] NMI backtrace for cpu 0 [ 286.808373][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 PREEMPT(full) [ 286.808392][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 286.808402][ T31] Call Trace: [ 286.808409][ T31] [ 286.808415][ T31] dump_stack_lvl+0x189/0x250 [ 286.808438][ T31] ? __wake_up_klogd+0xd9/0x110 [ 286.808457][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 286.808477][ T31] ? __pfx__printk+0x10/0x10 [ 286.808510][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 286.808534][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 286.808552][ T31] ? _printk+0xcf/0x120 [ 286.808579][ T31] ? __pfx__printk+0x10/0x10 [ 286.808603][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 286.808628][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 286.808658][ T31] watchdog+0xfee/0x1030 [ 286.808679][ T31] ? watchdog+0x1de/0x1030 [ 286.808704][ T31] kthread+0x70e/0x8a0 [ 286.808724][ T31] ? __pfx_watchdog+0x10/0x10 [ 286.808740][ T31] ? __pfx_kthread+0x10/0x10 [ 286.808758][ T31] ? __pfx_kthread+0x10/0x10 [ 286.808773][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.808795][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.808818][ T31] ? __pfx_kthread+0x10/0x10 [ 286.808833][ T31] ret_from_fork+0x4b/0x80 [ 286.808847][ T31] ? __pfx_kthread+0x10/0x10 [ 286.808863][ T31] ret_from_fork_asm+0x1a/0x30 [ 286.808898][ T31] [ 286.808903][ T31] Sending NMI from CPU 0 to CPUs 1: [ 286.955756][ C1] NMI backtrace for cpu 1 [ 286.955772][ C1] CPU: 1 UID: 0 PID: 5826 Comm: bch-copygc/loop Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 PREEMPT(full) [ 286.955791][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 286.955801][ C1] RIP: 0010:bch2_btree_write_buffer_flush_locked+0x45/0x45a0 [ 286.955827][ C1] Code: 00 49 89 ff 65 48 8b 05 99 0c 4e 0e 48 89 84 24 00 03 00 00 49 bd 00 00 00 00 00 fc ff df 48 c7 84 24 80 01 00 00 b3 8a b5 41 <48> c7 84 24 88 01 00 00 2e 06 91 8d 48 c7 84 24 90 01 00 00 60 c3 [ 286.955845][ C1] RSP: 0018:ffffc9000408f2c0 EFLAGS: 00000286 [ 286.955860][ C1] RAX: 2c4ea47cbfb1f900 RBX: ffff88807a100000 RCX: ffff88807fd61e00 [ 286.955872][ C1] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880280cc000 [ 286.955882][ C1] RBP: ffffc9000408f618 R08: 0000000000000000 R09: 0000000000000000 [ 286.955892][ C1] R10: 0000000000008000 R11: ffffffff84240a40 R12: 0000000000000001 [ 286.955902][ C1] R13: dffffc0000000000 R14: ffff8880280cc000 R15: ffff8880280cc000 [ 286.955914][ C1] FS: 0000000000000000(0000) GS:ffff888126203000(0000) knlGS:0000000000000000 [ 286.955927][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.955937][ C1] CR2: 0000563e76368600 CR3: 00000000330b8000 CR4: 00000000003526f0 [ 286.955951][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.955960][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.955969][ C1] Call Trace: [ 286.955975][ C1] [ 286.955991][ C1] ? kasan_quarantine_put+0xdd/0x220 [ 286.956011][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.956035][ C1] ? bch2_trans_srcu_unlock+0x6e/0x620 [ 286.956051][ C1] ? bch2_trans_unlock+0x320/0x4b0 [ 286.956070][ C1] ? move_buckets_wait+0x1264/0x12d0 [ 286.956094][ C1] ? __lock_acquire+0xaac/0xd20 [ 286.956117][ C1] ? bch2_btree_write_buffer_tryflush+0x130/0x1a0 [ 286.956135][ C1] ? kasan_quarantine_put+0xdd/0x220 [ 286.956154][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.956180][ C1] bch2_btree_write_buffer_tryflush+0x150/0x1a0 [ 286.956199][ C1] bch2_copygc+0x28a/0x3cf0 [ 286.956218][ C1] ? bch2_copygc+0x3c0/0x3cf0 [ 286.956237][ C1] ? __lock_acquire+0xaac/0xd20 [ 286.956263][ C1] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 286.956281][ C1] ? __pfx_bch2_copygc+0x10/0x10 [ 286.956298][ C1] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 286.956315][ C1] ? bch2_copygc_wait_amount+0xb4e/0xbb0 [ 286.956333][ C1] ? bch2_copygc_wait_amount+0xdc/0xbb0 [ 286.956354][ C1] ? __pfx_bch2_copygc_wait_amount+0x10/0x10 [ 286.956371][ C1] ? do_raw_spin_lock+0x121/0x290 [ 286.956405][ C1] bch2_copygc_thread+0x8c9/0xd40 [ 286.956423][ C1] ? bch2_copygc_thread+0x17b/0xd40 [ 286.956448][ C1] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 286.956466][ C1] ? bch2_copygc_thread+0x3dd/0xd40 [ 286.956501][ C1] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 286.956523][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.956550][ C1] ? __kthread_parkme+0x7b/0x200 [ 286.956572][ C1] ? __kthread_parkme+0x1a1/0x200 [ 286.956596][ C1] kthread+0x70e/0x8a0 [ 286.956613][ C1] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 286.956636][ C1] ? __pfx_kthread+0x10/0x10 [ 286.956652][ C1] ? __pfx_kthread+0x10/0x10 [ 286.956666][ C1] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.956686][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.956708][ C1] ? __pfx_kthread+0x10/0x10 [ 286.956722][ C1] ret_from_fork+0x4b/0x80 [ 286.956736][ C1] ? __pfx_kthread+0x10/0x10 [ 286.956751][ C1] ret_from_fork_asm+0x1a/0x30 [ 286.956780][ C1] [ 286.956786][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.031 msecs [ 286.957836][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.316916][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc4-syzkaller-00021-gca91b9500108 #0 PREEMPT(full) [ 287.328708][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 287.338755][ T31] Call Trace: [ 287.342031][ T31] [ 287.344956][ T31] dump_stack_lvl+0x99/0x250 [ 287.349553][ T31] ? __asan_memcpy+0x40/0x70 [ 287.354140][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.359330][ T31] ? __pfx__printk+0x10/0x10 [ 287.364011][ T31] panic+0x2db/0x790 [ 287.367908][ T31] ? __pfx_panic+0x10/0x10 [ 287.372403][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.378204][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.383567][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.389721][ T31] watchdog+0x102d/0x1030 [ 287.394046][ T31] ? watchdog+0x1de/0x1030 [ 287.398456][ T31] kthread+0x70e/0x8a0 [ 287.402519][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.407187][ T31] ? __pfx_kthread+0x10/0x10 [ 287.411786][ T31] ? __pfx_kthread+0x10/0x10 [ 287.416387][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.421580][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.426771][ T31] ? __pfx_kthread+0x10/0x10 [ 287.431350][ T31] ret_from_fork+0x4b/0x80 [ 287.435755][ T31] ? __pfx_kthread+0x10/0x10 [ 287.440336][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.445103][ T31] [ 287.448358][ T31] Kernel Offset: disabled [ 287.452676][ T31] Rebooting in 86400 seconds..