./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1608466827 <...> Warning: Permanently added '10.128.1.53' (ED25519) to the list of known hosts. execve("./syz-executor1608466827", ["./syz-executor1608466827"], 0x7ffea1269db0 /* 10 vars */) = 0 brk(NULL) = 0x55558d7e4000 brk(0x55558d7e4d00) = 0x55558d7e4d00 arch_prctl(ARCH_SET_FS, 0x55558d7e4380) = 0 set_tid_address(0x55558d7e4650) = 5832 set_robust_list(0x55558d7e4660, 24) = 0 rseq(0x55558d7e4ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1608466827", 4096) = 28 getrandom("\x2c\xab\xa8\xe6\xfd\xb4\x47\x38", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558d7e4d00 brk(0x55558d805d00) = 0x55558d805d00 brk(0x55558d806000) = 0x55558d806000 mprotect(0x7fc232efd000, 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 5833 attached [pid 5833] set_robust_list(0x55558d7e4660, 24 [pid 5832] <... clone resumed>, child_tidptr=0x55558d7e4650) = 5833 [pid 5833] <... set_robust_list resumed>) = 0 [pid 5833] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5833] setpgid(0, 0) = 0 [pid 5833] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5833] write(3, "1000", 4) = 4 [pid 5833] close(3) = 0 [pid 5833] write(1, "executing program\n", 18executing program ) = 18 [pid 5833] memfd_create("syzkaller", 0) = 3 [pid 5833] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc22aa00000 [pid 5833] 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 5833] munmap(0x7fc22aa00000, 138412032) = 0 [pid 5833] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5833] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5833] close(3) = 0 [pid 5833] close(4) = 0 [pid 5833] mkdir("./file0", 0777) = 0 [ 99.863134][ T5833] loop0: detected capacity change from 0 to 32768 [ 99.958811][ T5833] 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 [ 99.978513][ T5833] bcachefs (loop0): recovering from clean shutdown, journal seq 13 [ 100.001884][ T5833] bcachefs (loop0): accounting_read... done [ 100.008840][ T5833] bcachefs (loop0): alloc_read... done [ 100.014567][ T5833] bcachefs (loop0): snapshots_read... done [ 100.023496][ T5833] bcachefs (loop0): going read-write [ 100.032429][ T5833] bcachefs (loop0): journal_replay... done [ 100.038310][ T5833] bcachefs (loop0): resume_logged_ops... done [ 100.045205][ T5833] bcachefs (loop0): delete_dead_inodes... done [ 100.053466][ T5833] bcachefs (loop0): done starting filesystem [pid 5833] mount("/dev/loop0", "./file0", "bcachefs", 0, "version_upgrade=none,background_compression=lz4,") = 0 [pid 5833] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5833] chdir("./file0") = 0 [pid 5833] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5833] ioctl(4, LOOP_CLR_FD) = 0 [pid 5833] close(4) = 0 [ 100.059930][ T5842] bcachefs (loop0): backpointer doesn't match extent it points to: [ 100.059954][ T5842] 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 [ 100.059971][ T5842] 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 [ 100.059991][ T5842] 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 [pid 5833] creat("./file2", 0401 [pid 5832] kill(-5833, SIGKILL) = 0 [pid 5832] kill(5833, SIGKILL) = 0 [pid 5832] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5832] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5832] getdents64(3, 0x55558d7e56f0 /* 2 entries */, 32768) = 48 [pid 5832] getdents64(3, 0x55558d7e56f0 /* 0 entries */, 32768) = 0 [pid 5832] close(3) = 0 [ 131.580256][ T5833] Allocator stuck? Waited for 30 seconds [ 131.580282][ T5833] Allocator debug: [ 131.580293][ T5833] capacity1536 [ 131.580303][ T5833] reserved 31232 [ 131.580314][ T5833] hidden 0 [ 131.580324][ T5833] btree 0 [ 131.580334][ T5833] data 0 [ 131.580344][ T5833] cached 0 [ 131.580354][ T5833] reserved 0 [ 131.580365][ T5833] online_reserved 768 [ 131.580375][ T5833] nr_inodes 0 [ 131.580385][ T5833] [ 131.580394][ T5833] freelist_wait waiting [ 131.580405][ T5833] open buckets allocated1 [ 131.580415][ T5833] open buckets total 1024 [ 131.580425][ T5833] open_buckets_wait empty [ 131.580436][ T5833] open_buckets_btree 0 [ 131.580446][ T5833] open_buckets_user 0 [ 131.580456][ T5833] btree reserve cache 0 [ 131.580466][ T5833] [ 131.580474][ T5833] Dev 0: [ 131.580484][ T5833] buckets sectors fragmented [ 131.580496][ T5833] free 0 0 0 [ 131.580508][ T5833] sb 0 0 0 [ 131.580520][ T5833] journal 0 0 0 [ 131.580539][ T5833] btree 0 0 0 [ 131.580551][ T5833] user 0 0 0 [ 131.580563][ T5833] cached 0 0 0 [ 131.580575][ T5833] parity 0 0 0 [ 131.580587][ T5833] stripe 0 0 0 [ 131.580599][ T5833] need_gc_gens 0 0 0 [ 131.580611][ T5833] need_discard 0 0 0 [ 131.580623][ T5833] unstriped 0 0 0 [ 131.580635][ T5833] capacity 128 [ 131.580645][ T5833] [ 131.580654][ T5833] reserves: [ 131.580664][ T5833] stripe 60 [ 131.580674][ T5833] normal 58 [ 131.580684][ T5833] copygc 56 [ 131.580695][ T5833] btree 28 [ 131.580705][ T5833] btree_copygc 0 [ 131.580715][ T5833] reclaim 0 [ 131.580726][ T5833] interior_updates 0 [ 131.580736][ T5833] [ 131.580745][ T5833] open buckets 0 [ 131.580755][ T5833] buckets to invalidate 0 [ 131.580765][ T5833] [ 131.580774][ T5833] Copygc debug: [ 131.580784][ T5833] running: 1 [ 131.580793][ T5833] copygc_wait:0 [ 131.580803][ T5833] copygc_wait_at:0 [ 131.580813][ T5833] Currently waiting for:0 B [ 131.580823][ T5833] Currently waiting since:640 KiB [ 131.580852][ T5833] Currently calculated wait:0 B [ 131.580862][ T5833] [ 131.580886][ T5833] Journal debug: [ 131.580896][ T5833] flags: replay_done,running,may_skip_flush [ 131.580908][ T5833] dirty journal entries: 0/32768 [ 131.580918][ T5833] seq: 14 [ 131.580929][ T5833] seq_ondisk: 14 [ 131.580939][ T5833] last_seq: 15 [ 131.580950][ T5833] last_seq_ondisk: 14 [ 131.580960][ T5833] flushed_seq_ondisk: 14 [ 131.580970][ T5833] watermark: stripe [ 131.580981][ T5833] each entry reserved: 321 [ 131.580991][ T5833] nr flush writes: 1 [ 131.581001][ T5833] nr noflush writes: 0 [ 131.581012][ T5833] average write size: 1.27 KiB [ 131.581023][ T5833] free buf: 65536 [ 131.581033][ T5833] nr direct reclaim: 0 [ 131.581043][ T5833] nr background reclaim: 1 [ 131.581053][ T5833] reclaim kicked: 0 [ 131.581063][ T5833] reclaim runs in: 0 ms [ 131.581074][ T5833] blocked: 0 [ 131.581084][ T5833] current entry sectors: 256 [ 131.581095][ T5833] current entry error: (No error) [ 131.581105][ T5833] current entry: closed [ 131.581116][ T5833] unwritten entries: [ 131.581126][ T5833] last buf closed [ 131.581150][ T5833] space: [ 131.581160][ T5833] discarded 256:1536 [ 131.581171][ T5833] clean ondisk 256:1536 [ 131.581200][ T5833] clean 256:1536 [ 131.581211][ T5833] total 256:2048 [ 131.581222][ T5833] dev 0: [ 131.581231][ T5833] durability 1: [ 131.581242][ T5833] nr 8 [ 131.581252][ T5833] bucket size 256 [ 131.581263][ T5833] available 6:248 [ 131.581274][ T5833] discard_idx 0 [ 131.581284][ T5833] dirty_ondisk 0 (seq 14) [ 131.581295][ T5833] dirty_idx 0 (seq 14) [ 131.581307][ T5833] cur_idx 0 (seq 14) [ 131.581318][ T5833] replicas want 1 need 1 [ 286.450566][ T31] INFO: task syz-executor160:5833 blocked for more than 143 seconds. [ 286.458871][ T31] Not tainted 6.15.0-rc2-syzkaller-00257-gb5c6891b2c5b #0 [ 286.466535][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.475627][ T31] task:syz-executor160 state:D stack:20144 pid:5833 tgid:5833 ppid:5832 task_flags:0x400140 flags:0x00004006 [ 286.488172][ T31] Call Trace: [ 286.491711][ T31] [ 286.494684][ T31] __schedule+0x1b33/0x51f0 [ 286.499574][ T31] ? schedule+0x163/0x360 [ 286.503962][ T31] ? __pfx___schedule+0x10/0x10 [ 286.509128][ T31] ? kfree+0x198/0x430 [ 286.513257][ T31] ? schedule+0x90/0x360 [ 286.517544][ T31] ? schedule+0x90/0x360 [ 286.522143][ T31] schedule+0x163/0x360 [ 286.526349][ T31] ? __closure_sync+0x143/0x2a0 [ 286.531537][ T31] __closure_sync+0x1c0/0x2a0 [ 286.536272][ T31] ? __pfx___closure_sync+0x10/0x10 [ 286.542218][ T31] ? __bch2_wait_on_allocator+0x1d6/0x250 [ 286.547990][ T31] bch2_btree_update_start+0x12bd/0x16c0 [ 286.553949][ T31] ? bch2_btree_split_leaf+0x12d/0x8a0 [ 286.559666][ T31] ? __pfx_bch2_btree_update_start+0x10/0x10 [ 286.565695][ T31] ? bch2_logged_op_start+0x1e6/0x3f0 [ 286.571382][ T31] ? bch2_btree_path_peek_slot+0x3f8/0xff0 [ 286.577241][ T31] ? __pfx_closure_sync_fn+0x10/0x10 [ 286.582861][ T31] ? __pfx_bch2_btree_path_peek_slot+0x10/0x10 [ 286.589288][ T31] ? bch2_trans_update_by_path+0xffe/0x2150 [ 286.595234][ T31] bch2_btree_split_leaf+0x12d/0x8a0 [ 286.600926][ T31] bch2_trans_commit_error+0x1b3/0x1480 [ 286.606531][ T31] ? bch2_logged_op_start+0x22d/0x3f0 [ 286.612213][ T31] ? six_unlock_ip+0x2f8/0x440 [ 286.617028][ T31] ? __pfx_bch2_trans_commit_error+0x10/0x10 [ 286.623341][ T31] ? bch2_trans_verify_locks+0x33c/0x3c0 [ 286.629252][ T31] __bch2_trans_commit+0x8886/0x9da0 [ 286.634620][ T31] ? bch2_logged_op_start+0x22d/0x3f0 [ 286.640311][ T31] ? __pfx___bch2_trans_commit+0x10/0x10 [ 286.646019][ T31] ? bch2_trans_begin+0x1795/0x1d30 [ 286.652105][ T31] ? bch2_path_put+0x1de/0x2330 [ 286.657020][ T31] ? __pfx_bch2_bkey_get_empty_slot+0x10/0x10 [ 286.663452][ T31] ? bch2_trans_iter_exit+0x18a/0x300 [ 286.669087][ T31] bch2_logged_op_start+0x22d/0x3f0 [ 286.674344][ T31] ? __pfx_bch2_logged_op_start+0x10/0x10 [ 286.680393][ T31] ? bch2_bkey_get_empty_slot+0x111/0x5b0 [ 286.686181][ T31] bch2_truncate+0x1eb/0x340 [ 286.691140][ T31] ? __pfx_bch2_truncate+0x10/0x10 [ 286.696302][ T31] ? unmap_mapping_range+0xfa/0x2a0 [ 286.701856][ T31] ? truncate_setsize+0xcf/0xf0 [ 286.706755][ T31] bchfs_truncate+0x97b/0xc60 [ 286.711781][ T31] ? bch2_trans_put+0xa59/0x1030 [ 286.716794][ T31] ? __pfx_bchfs_truncate+0x10/0x10 [ 286.722354][ T31] ? setattr_prepare+0x1f5/0xb20 [ 286.727366][ T31] ? bch2_setattr+0x1a4/0x220 [ 286.732348][ T31] ? __pfx_bch2_setattr+0x10/0x10 [ 286.737438][ T31] notify_change+0xbca/0xe90 [ 286.742328][ T31] do_truncate+0x222/0x310 [ 286.746789][ T31] ? __pfx_do_truncate+0x10/0x10 [ 286.752258][ T31] path_openat+0x2e4f/0x35d0 [ 286.756950][ T31] ? __pfx_path_openat+0x10/0x10 [ 286.762646][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.768969][ T31] do_filp_open+0x284/0x4e0 [ 286.773618][ T31] ? __pfx_do_filp_open+0x10/0x10 [ 286.778927][ T31] ? do_raw_spin_lock+0x151/0x370 [ 286.784031][ T31] do_sys_openat2+0x12b/0x1d0 [ 286.788995][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 286.794243][ T31] ? __pfx_do_sys_openat2+0x10/0x10 [ 286.799906][ T31] ? ptrace_notify+0x282/0x390 [ 286.804738][ T31] __x64_sys_creat+0x124/0x170 [ 286.809847][ T31] ? __pfx___x64_sys_creat+0x10/0x10 [ 286.815204][ T31] do_syscall_64+0xf3/0x210 [ 286.820009][ T31] ? clear_bhb_loop+0x45/0xa0 [ 286.824734][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.830925][ T31] RIP: 0033:0x7fc232e7ab19 [ 286.835389][ T31] RSP: 002b:00007ffd56149448 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 [ 286.844193][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc232e7ab19 [ 286.852455][ T31] RDX: 00007fc232e79d70 RSI: 0000000000000101 RDI: 0000200000000280 [ 286.860687][ T31] RBP: 00007fc232efd5f0 R08: 000000000000f624 R09: 000055558d7e54c0 [ 286.869392][ T31] R10: 00007ffd56149310 R11: 0000000000000246 R12: 00007ffd56149470 [ 286.877408][ T31] R13: 00007ffd56149698 R14: 431bde82d7b634db R15: 00007fc232ec303b [ 286.885763][ T31] [ 286.889134][ T31] [ 286.889134][ T31] Showing all locks held in the system: [ 286.896888][ T31] 1 lock held by khungtaskd/31: [ 286.902273][ T31] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 [ 286.912488][ T31] 1 lock held by syslogd/5183: [ 286.917285][ T31] #0: ffff8880b8639998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 286.927599][ T31] 2 locks held by getty/5584: [ 286.932614][ T31] #0: ffff8880319a40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.942664][ T31] #1: ffffc9000332e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 [ 286.953129][ T31] 5 locks held by syz-executor160/5833: [ 286.958994][ T31] #0: ffff888035e6a420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 286.968231][ T31] #1: ffff8880737c88e0 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: do_truncate+0x20e/0x310 [ 286.979595][ T31] #2: ffff888075280a58 (&c->snapshot_create_lock){.+.+}-{4:4}, at: bch2_truncate+0x1ae/0x340 [ 286.990213][ T31] #3: ffff888075284210 (&c->btree_trans_barrier){.+.+}-{0:0}, at: __bch2_trans_get+0x7ed/0xd40 [ 287.000978][ T31] #4: ffff8880752a6550 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x68a/0x16c0 [ 287.011371][ T31] 3 locks held by bch-copygc/loop/5842: [ 287.017007][ T31] [ 287.019694][ T31] ============================================= [ 287.019694][ T31] [ 287.028170][ T31] NMI backtrace for cpu 1 [ 287.028197][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00257-gb5c6891b2c5b #0 PREEMPT(full) [ 287.028222][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 287.028234][ T31] Call Trace: [ 287.028242][ T31] [ 287.028253][ T31] dump_stack_lvl+0x241/0x360 [ 287.028289][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.028318][ T31] ? __pfx__printk+0x10/0x10 [ 287.028357][ T31] nmi_cpu_backtrace+0x4ab/0x4e0 [ 287.028392][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.028418][ T31] ? _printk+0xd5/0x120 [ 287.028444][ T31] ? __wake_up_klogd+0xcc/0x110 [ 287.028469][ T31] ? __pfx__printk+0x10/0x10 [ 287.028499][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.028532][ T31] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 287.028566][ T31] watchdog+0x1058/0x10a0 [ 287.028593][ T31] ? watchdog+0x1ea/0x10a0 [ 287.028638][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.028661][ T31] kthread+0x7b7/0x940 [ 287.028685][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.028711][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028730][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028751][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028773][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028794][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.028823][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 287.028843][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028866][ T31] ret_from_fork+0x4b/0x80 [ 287.028890][ T31] ? __pfx_kthread+0x10/0x10 [ 287.028912][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.028959][ T31] [ 287.184683][ T31] Sending NMI from CPU 1 to CPUs 0: [ 287.189963][ C0] NMI backtrace for cpu 0 [ 287.189981][ C0] CPU: 0 UID: 0 PID: 5842 Comm: bch-copygc/loop Not tainted 6.15.0-rc2-syzkaller-00257-gb5c6891b2c5b #0 PREEMPT(full) [ 287.190001][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 287.190011][ C0] RIP: 0010:bch2_trans_iter_exit+0xd3/0x300 [ 287.190041][ C0] Code: 6b fd 4d 89 ef 49 c1 ef 03 41 0f b6 04 1f 84 c0 0f 85 4f 01 00 00 41 0f b7 6d 00 31 ff 89 ee e8 23 e1 6b fd 85 ed 4c 89 24 24 <74> 49 e8 76 dd 6b fd 48 89 d9 49 8d 5d 08 48 89 d8 48 c1 e8 03 0f [ 287.190056][ C0] RSP: 0018:ffffc9000411f4d0 EFLAGS: 00000202 [ 287.190071][ C0] RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88807d6d1e00 [ 287.190083][ C0] RDX: ffff88807d6d1e00 RSI: 0000000000000001 RDI: 0000000000000000 [ 287.190094][ C0] RBP: 0000000000000001 R08: ffffffff8456dc7d R09: 0000000000000000 [ 287.190104][ C0] R10: ffffc9000411ef40 R11: fffff52000823df4 R12: ffff8880728b0000 [ 287.190117][ C0] R13: ffffc9000411f980 R14: ffffc9000411f982 R15: 1ffff92000823f30 [ 287.190129][ C0] FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000 [ 287.190143][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.190154][ C0] CR2: 0000556147283600 CR3: 0000000030210000 CR4: 00000000003526f0 [ 287.190168][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 287.190199][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 287.190209][ C0] Call Trace: [ 287.190216][ C0] [ 287.190227][ C0] bch2_copygc+0x2e1f/0x4db0 [ 287.190257][ C0] ? bch2_copygc+0x457/0x4db0 [ 287.190304][ C0] ? __pfx_bch2_copygc+0x10/0x10 [ 287.190328][ C0] ? __lock_acquire+0xad5/0xd80 [ 287.190364][ C0] ? bch2_copygc_wait_amount+0x107/0xd00 [ 287.190393][ C0] ? bch2_copygc+0x457/0x4db0 [ 287.190417][ C0] ? bch2_copygc_wait_amount+0x107/0xd00 [ 287.190459][ C0] ? bch2_copygc+0x457/0x4db0 [ 287.190485][ C0] ? bch2_trans_srcu_unlock+0x459/0x5c0 [ 287.190515][ C0] bch2_copygc_thread+0x705/0xc00 [ 287.190547][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 287.190573][ C0] ? bch2_copygc_thread+0x1a3/0xc00 [ 287.190619][ C0] ? _raw_spin_unlock_irqrestore+0x90/0x140 [ 287.190645][ C0] ? lockdep_hardirqs_on+0x9d/0x150 [ 287.190670][ C0] ? __kthread_parkme+0x1a8/0x200 [ 287.190698][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 287.190724][ C0] kthread+0x7b7/0x940 [ 287.190742][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 287.190768][ C0] ? __pfx_kthread+0x10/0x10 [ 287.190784][ C0] ? __pfx_kthread+0x10/0x10 [ 287.190800][ C0] ? __pfx_kthread+0x10/0x10 [ 287.190817][ C0] ? __pfx_kthread+0x10/0x10 [ 287.190833][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.190857][ C0] ? lockdep_hardirqs_on+0x9d/0x150 [ 287.190872][ C0] ? __pfx_kthread+0x10/0x10 [ 287.190889][ C0] ret_from_fork+0x4b/0x80 [ 287.190903][ C0] ? __pfx_kthread+0x10/0x10 [ 287.190920][ C0] ret_from_fork_asm+0x1a/0x30 [ 287.190953][ C0] [ 287.196155][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.489394][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc2-syzkaller-00257-gb5c6891b2c5b #0 PREEMPT(full) [ 287.501231][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 287.511314][ T31] Call Trace: [ 287.514618][ T31] [ 287.517581][ T31] dump_stack_lvl+0x241/0x360 [ 287.522474][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.527708][ T31] ? __pfx__printk+0x10/0x10 [ 287.532343][ T31] ? vscnprintf+0x5d/0x90 [ 287.536711][ T31] panic+0x349/0x880 [ 287.540643][ T31] ? __pfx_preempt_schedule+0x10/0x10 [ 287.546060][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.552256][ T31] ? __pfx_panic+0x10/0x10 [ 287.556706][ T31] ? tick_nohz_tick_stopped+0x82/0xb0 [ 287.562122][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.567526][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 287.573723][ T31] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 287.579916][ T31] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 287.586108][ T31] watchdog+0x1097/0x10a0 [ 287.590471][ T31] ? watchdog+0x1ea/0x10a0 [ 287.594926][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.599648][ T31] kthread+0x7b7/0x940 [ 287.603788][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.608605][ T31] ? __pfx_kthread+0x10/0x10 [ 287.613239][ T31] ? __pfx_kthread+0x10/0x10 [ 287.617874][ T31] ? __pfx_kthread+0x10/0x10 [ 287.622510][ T31] ? __pfx_kthread+0x10/0x10 [ 287.627141][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.632376][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 287.637610][ T31] ? __pfx_kthread+0x10/0x10 [ 287.642243][ T31] ret_from_fork+0x4b/0x80 [ 287.646680][ T31] ? __pfx_kthread+0x10/0x10 [ 287.651302][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.656157][ T31] [ 287.659536][ T31] Kernel Offset: disabled [ 287.663887][ T31] Rebooting in 86400 seconds..