./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4135852714 <...> Warning: Permanently added '10.128.10.51' (ED25519) to the list of known hosts. execve("./syz-executor4135852714", ["./syz-executor4135852714"], 0x7ffe2293c580 /* 10 vars */) = 0 brk(NULL) = 0x555566a7c000 brk(0x555566a7cd00) = 0x555566a7cd00 arch_prctl(ARCH_SET_FS, 0x555566a7c380) = 0 set_tid_address(0x555566a7c650) = 5847 set_robust_list(0x555566a7c660, 24) = 0 rseq(0x555566a7cca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4135852714", 4096) = 28 getrandom("\x84\x23\x2d\x3f\x84\x2e\x96\x54", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555566a7cd00 brk(0x555566a9dd00) = 0x555566a9dd00 brk(0x555566a9e000) = 0x555566a9e000 mprotect(0x7f3ce7055000, 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 5848 attached , child_tidptr=0x555566a7c650) = 5848 [pid 5848] set_robust_list(0x555566a7c660, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3) = 0 [pid 5848] write(1, "executing program\n", 18executing program ) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3cdea00000 [pid 5848] 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 5848] munmap(0x7f3cdea00000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5848] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5848] close(3) = 0 [pid 5848] close(4) = 0 [pid 5848] mkdir("./file0", 0777) = 0 [ 184.783678][ T5848] loop0: detected capacity change from 0 to 32768 [ 184.876382][ T5848] 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 [ 184.876382][ T5848] allowing incompatible features above 0.0: (unknown version) [ 184.903632][ T5848] bcachefs (loop0): recovering from clean shutdown, journal seq 13 [ 184.925971][ T5848] bcachefs (loop0): accounting_read... done [ 184.933343][ T5848] bcachefs (loop0): alloc_read... done [ 184.939051][ T5848] bcachefs (loop0): snapshots_read... done [ 184.947949][ T5848] bcachefs (loop0): going read-write [ 184.957085][ T5848] bcachefs (loop0): journal_replay... done [ 184.963395][ T5848] bcachefs (loop0): resume_logged_ops... done [ 184.969586][ T5848] bcachefs (loop0): delete_dead_inodes... done [pid 5848] mount("/dev/loop0", "./file0", "bcachefs", 0, "version_upgrade=none,background_compression=lz4,") = 0 [pid 5848] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5848] chdir("./file0") = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5848] ioctl(4, LOOP_CLR_FD) = 0 [ 184.978300][ T5848] bcachefs (loop0): done starting filesystem [ 184.984536][ T5858] bcachefs (loop0): backpointer doesn't match extent it points to: [ 184.984562][ T5858] 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 [ 184.984580][ T5858] 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 5848] close(4) = 0 [pid 5848] rename("./file1", "./file2") = 0 [ 184.984600][ T5858] 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 5848] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC|O_DIRECT, 0733 [pid 5847] kill(-5848, SIGKILL) = 0 [pid 5847] kill(5848, SIGKILL) = 0 [pid 5847] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5847] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5847] getdents64(3, 0x555566a7d6f0 /* 2 entries */, 32768) = 48 [pid 5847] getdents64(3, 0x555566a7d6f0 /* 0 entries */, 32768) = 0 [pid 5847] close(3) = 0 [ 216.571897][ T5848] Allocator stuck? Waited for 30 seconds [ 216.571922][ T5848] Allocator debug: [ 216.571933][ T5848] capacity1536 [ 216.571942][ T5848] reserved 31232 [ 216.571952][ T5848] hidden 0 [ 216.571961][ T5848] btree 0 [ 216.571971][ T5848] data 0 [ 216.571980][ T5848] cached 0 [ 216.571990][ T5848] reserved 0 [ 216.572000][ T5848] online_reserved 768 [ 216.572009][ T5848] nr_inodes 0 [ 216.572018][ T5848] [ 216.572027][ T5848] freelist_wait waiting [ 216.572036][ T5848] open buckets allocated1 [ 216.572046][ T5848] open buckets total 1024 [ 216.572055][ T5848] open_buckets_wait empty [ 216.572065][ T5848] open_buckets_btree 0 [ 216.572074][ T5848] open_buckets_user 0 [ 216.572083][ T5848] btree reserve cache 0 [ 216.572093][ T5848] [ 216.572102][ T5848] Dev 0: [ 216.572110][ T5848] buckets sectors fragmented [ 216.572121][ T5848] free 0 0 0 [ 216.572133][ T5848] sb 0 0 0 [ 216.572144][ T5848] journal 0 0 0 [ 216.572155][ T5848] btree 0 0 0 [ 216.572167][ T5848] user 0 0 0 [ 216.572178][ T5848] cached 0 0 0 [ 216.572189][ T5848] parity 0 0 0 [ 216.572199][ T5848] stripe 0 0 0 [ 216.572210][ T5848] need_gc_gens 0 0 0 [ 216.572221][ T5848] need_discard 0 0 0 [ 216.572232][ T5848] unstriped 0 0 0 [ 216.572243][ T5848] capacity 128 [ 216.572252][ T5848] [ 216.572261][ T5848] reserves: [ 216.572270][ T5848] stripe 60 [ 216.572279][ T5848] normal 58 [ 216.572289][ T5848] copygc 56 [ 216.572298][ T5848] btree 28 [ 216.572308][ T5848] btree_copygc 0 [ 216.572317][ T5848] reclaim 0 [ 216.572327][ T5848] interior_updates 0 [ 216.572344][ T5848] [ 216.572352][ T5848] open buckets 0 [ 216.572362][ T5848] buckets to invalidate 0 [ 216.572371][ T5848] [ 216.572380][ T5848] Copygc debug: [ 216.572389][ T5848] running: 1 [ 216.572397][ T5848] copygc_wait:0 [ 216.572406][ T5848] copygc_wait_at:0 [ 216.572415][ T5848] Currently waiting for:0 B [ 216.572425][ T5848] Currently waiting since:640 KiB [ 216.572435][ T5848] Currently calculated wait:0 B [ 216.572445][ T5848] [ 216.572453][ T5848] Journal debug: [ 216.572462][ T5848] flags: replay_done,running,may_skip_flush [ 216.572474][ T5848] dirty journal entries: 0/32768 [ 216.572483][ T5848] seq: 14 [ 216.572493][ T5848] seq_ondisk: 14 [ 216.572503][ T5848] last_seq: 15 [ 216.572512][ T5848] last_seq_ondisk: 14 [ 216.572522][ T5848] flushed_seq_ondisk: 14 [ 216.572532][ T5848] watermark: stripe [ 216.572542][ T5848] each entry reserved: 321 [ 216.572551][ T5848] nr flush writes: 1 [ 216.572561][ T5848] nr noflush writes: 0 [ 216.572571][ T5848] average write size: 2.00 KiB [ 216.572581][ T5848] free buf: 65536 [ 216.572591][ T5848] nr direct reclaim: 0 [ 216.572600][ T5848] nr background reclaim: 8 [ 216.572610][ T5848] reclaim kicked: 0 [ 216.572619][ T5848] reclaim runs in: 0 ms [ 216.572629][ T5848] blocked: 0 [ 216.572639][ T5848] current entry sectors: 256 [ 216.572649][ T5848] current entry error: (No error) [ 216.572659][ T5848] current entry: closed [ 216.572668][ T5848] unwritten entries: [ 216.572678][ T5848] last buf closed [ 216.572687][ T5848] space: [ 216.572695][ T5848] discarded 256:1536 [ 216.572705][ T5848] clean ondisk 256:1536 [ 216.572715][ T5848] clean 256:1536 [ 216.572725][ T5848] total 256:2048 [ 216.572735][ T5848] dev 0: [ 216.572744][ T5848] durability 1: [ 216.572753][ T5848] nr 8 [ 216.572762][ T5848] bucket size 256 [ 216.572772][ T5848] available 6:248 [ 216.572782][ T5848] discard_idx 0 [ 216.572792][ T5848] dirty_ondisk 0 (seq 14) [ 216.572802][ T5848] dirty_idx 0 (seq 14) [ 216.572813][ T5848] cur_idx 0 (seq 14) [ 216.572823][ T5848] replicas want 1 need 1 [ 429.681019][ T31] INFO: task syz-executor413:5848 blocked for more than 143 seconds. [ 429.689172][ T31] Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 [ 429.698222][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.707255][ T31] task:syz-executor413 state:D stack:18128 pid:5848 tgid:5848 ppid:5847 task_flags:0x400140 flags:0x00004006 [ 429.719968][ T31] Call Trace: [ 429.723586][ T31] [ 429.726553][ T31] __schedule+0x1b33/0x51f0 [ 429.731460][ T31] ? schedule+0x163/0x360 [ 429.735836][ T31] ? __pfx___schedule+0x10/0x10 [ 429.741294][ T31] ? kfree+0x198/0x430 [ 429.745430][ T31] ? schedule+0x90/0x360 [ 429.749711][ T31] ? schedule+0x90/0x360 [ 429.754569][ T31] schedule+0x163/0x360 [ 429.758770][ T31] ? __closure_sync+0x143/0x2a0 [ 429.764088][ T31] __closure_sync+0x1c0/0x2a0 [ 429.768817][ T31] ? __pfx___closure_sync+0x10/0x10 [ 429.774475][ T31] ? __bch2_wait_on_allocator+0x1d6/0x250 [ 429.780238][ T31] bch2_btree_update_start+0x12bd/0x16c0 [ 429.786367][ T31] ? __pfx_bch2_inode_has_child_snapshots+0x10/0x10 [ 429.793282][ T31] ? bch2_btree_split_leaf+0x12d/0x8a0 [ 429.798872][ T31] ? __pfx_bch2_btree_update_start+0x10/0x10 [ 429.805328][ T31] ? __asan_memset+0x23/0x50 [ 429.809961][ T31] ? __bch2_bkey_unpack_key+0x959/0xdd0 [ 429.815941][ T31] ? bch2_btree_path_peek_slot+0x3f8/0xff0 [ 429.822468][ T31] ? __pfx_closure_sync_fn+0x10/0x10 [ 429.827807][ T31] ? __pfx_bch2_btree_path_peek_slot+0x10/0x10 [ 429.834484][ T31] bch2_btree_split_leaf+0x12d/0x8a0 [ 429.839826][ T31] bch2_trans_commit_error+0x1b3/0x1480 [ 429.845878][ T31] ? __bch2_create+0xa79/0xf40 [ 429.850978][ T31] ? six_unlock_ip+0x2f8/0x440 [ 429.855785][ T31] ? __pfx_bch2_trans_commit_error+0x10/0x10 [ 429.862370][ T31] ? bch2_trans_verify_locks+0x33c/0x3c0 [ 429.868062][ T31] __bch2_trans_commit+0x8886/0x9da0 [ 429.873818][ T31] ? bch2_trans_iter_init_outlined+0x2d3/0x4b0 [ 429.880052][ T31] ? __bch2_create+0xa79/0xf40 [ 429.885280][ T31] ? __pfx___bch2_trans_commit+0x10/0x10 [ 429.891235][ T31] ? __pfx___bch2_bkey_get_val_typed+0x10/0x10 [ 429.897438][ T31] ? flush_warnings+0x3e2/0x470 [ 429.902768][ T31] ? bch2_subvolume_get+0x144/0x290 [ 429.908021][ T31] ? bch2_subvolume_get+0x15c/0x290 [ 429.913694][ T31] ? __bch2_create+0x793/0xf40 [ 429.918516][ T31] __bch2_create+0xa79/0xf40 [ 429.923636][ T31] ? __pfx___bch2_create+0x10/0x10 [ 429.928842][ T31] ? smk_access+0x4ab/0x4e0 [ 429.934232][ T31] ? smk_tskacc+0x300/0x370 [ 429.938787][ T31] ? smack_inode_permission+0x2dd/0x380 [ 429.944647][ T31] ? __pfx_smack_inode_permission+0x10/0x10 [ 429.950583][ T31] bch2_create+0xec/0x1c0 [ 429.955389][ T31] ? __pfx_bch2_create+0x10/0x10 [ 429.960372][ T31] ? bpf_lsm_inode_create+0x9/0x10 [ 429.965897][ T31] ? security_inode_create+0xbe/0x340 [ 429.971567][ T31] ? __pfx_bch2_create+0x10/0x10 [ 429.976558][ T31] path_openat+0x194b/0x35d0 [ 429.981664][ T31] ? __pfx_path_openat+0x10/0x10 [ 429.986643][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.993150][ T31] do_filp_open+0x284/0x4e0 [ 429.997705][ T31] ? __pfx_do_filp_open+0x10/0x10 [ 430.003181][ T31] ? do_raw_spin_lock+0x151/0x370 [ 430.008287][ T31] do_sys_openat2+0x12b/0x1d0 [ 430.013404][ T31] ? __pfx_do_sys_openat2+0x10/0x10 [ 430.018638][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.024296][ T31] ? _raw_spin_unlock_irq+0x2e/0x50 [ 430.029558][ T31] ? ptrace_notify+0x282/0x390 [ 430.034767][ T31] __x64_sys_openat+0x249/0x2a0 [ 430.039667][ T31] ? __pfx___x64_sys_openat+0x10/0x10 [ 430.045915][ T31] do_syscall_64+0xf3/0x210 [ 430.050450][ T31] ? clear_bhb_loop+0x45/0xa0 [ 430.055551][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.061751][ T31] RIP: 0033:0x7f3ce6fd2b59 [ 430.066203][ T31] RSP: 002b:00007ffc331b4b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 430.075029][ T31] RAX: ffffffffffffffda RBX: 0000200000000080 RCX: 00007f3ce6fd2b59 [ 430.083348][ T31] RDX: 0000000000105042 RSI: 0000200000000080 RDI: 00000000ffffff9c [ 430.091593][ T31] RBP: 0031656c69662f2e R08: 0000555566a7d4c0 R09: 0000555566a7d4c0 [ 430.099592][ T31] R10: 00000000000001db R11: 0000000000000246 R12: 00007ffc331b4b40 [ 430.108068][ T31] R13: 00007ffc331b4d68 R14: 431bde82d7b634db R15: 00007f3ce701b03b [ 430.116404][ T31] [ 430.119516][ T31] [ 430.119516][ T31] Showing all locks held in the system: [ 430.127870][ T31] 1 lock held by khungtaskd/31: [ 430.133040][ T31] #0: ffffffff8ed3df20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x30/0x180 [ 430.143395][ T31] 2 locks held by getty/5587: [ 430.148108][ T31] #0: ffff888035a8a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.158869][ T31] #1: ffffc9000334b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x5bb/0x1700 [ 430.169427][ T31] 5 locks held by syz-executor413/5848: [ 430.175313][ T31] #0: ffff88807c380420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 430.184802][ T31] #1: ffff8880746c0148 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: path_openat+0x8af/0x35d0 [ 430.195561][ T31] #2: ffff8880746c0530 (&inode->ei_update_lock#4){+.+.}-{4:4}, at: __bch2_create+0x359/0xf40 [ 430.206173][ T31] #3: ffff888076204228 (&c->btree_trans_barrier){.+.+}-{0:0}, at: bch2_trans_srcu_lock+0x9a/0x1a0 [ 430.217234][ T31] #4: ffff888076226590 (&c->gc_lock){.+.+}-{4:4}, at: bch2_btree_update_start+0x68a/0x16c0 [ 430.227637][ T31] 1 lock held by bch-copygc/loop/5858: [ 430.233483][ T31] [ 430.235834][ T31] ============================================= [ 430.235834][ T31] [ 430.244826][ T31] NMI backtrace for cpu 1 [ 430.244853][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) [ 430.244877][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 430.244889][ T31] Call Trace: [ 430.244897][ T31] [ 430.244905][ T31] dump_stack_lvl+0x241/0x360 [ 430.244940][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.244968][ T31] ? __pfx__printk+0x10/0x10 [ 430.245005][ T31] nmi_cpu_backtrace+0x4ab/0x4e0 [ 430.245040][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.245066][ T31] ? _printk+0xd5/0x120 [ 430.245092][ T31] ? __wake_up_klogd+0xcc/0x110 [ 430.245116][ T31] ? __pfx__printk+0x10/0x10 [ 430.245145][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.245177][ T31] nmi_trigger_cpumask_backtrace+0x198/0x320 [ 430.245209][ T31] watchdog+0x1058/0x10a0 [ 430.245244][ T31] ? watchdog+0x1ea/0x10a0 [ 430.245274][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.245299][ T31] kthread+0x7b7/0x940 [ 430.245323][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.245347][ T31] ? __pfx_kthread+0x10/0x10 [ 430.245366][ T31] ? __pfx_kthread+0x10/0x10 [ 430.245387][ T31] ? __pfx_kthread+0x10/0x10 [ 430.245407][ T31] ? __pfx_kthread+0x10/0x10 [ 430.245428][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.245455][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.245475][ T31] ? __pfx_kthread+0x10/0x10 [ 430.245497][ T31] ret_from_fork+0x4b/0x80 [ 430.245514][ T31] ? __pfx_kthread+0x10/0x10 [ 430.245536][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.245580][ T31] [ 430.245588][ T31] Sending NMI from CPU 1 to CPUs 0: [ 430.406355][ C0] NMI backtrace for cpu 0 [ 430.406374][ C0] CPU: 0 UID: 0 PID: 5858 Comm: bch-copygc/loop Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) [ 430.406394][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 430.406405][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x2f/0x90 [ 430.406430][ C0] Code: 8b 04 24 65 48 8b 14 25 08 10 65 93 65 8b 05 b8 50 a2 11 25 00 01 ff 00 74 10 3d 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 74 52 <8b> 82 18 16 00 00 83 f8 03 75 47 48 8b 8a 20 16 00 00 44 8b 8a 1c [ 430.406444][ C0] RSP: 0018:ffffc900041deb40 EFLAGS: 00000246 [ 430.406459][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff888035870000 [ 430.406470][ C0] RDX: ffff888035870000 RSI: 0000000000000001 RDI: 0000000000000000 [ 430.406480][ C0] RBP: 1ffff9200083be01 R08: ffffffff84771a7b R09: 0000000000000000 [ 430.406491][ C0] R10: ffffc900041deb00 R11: fffff5200083bd62 R12: ffffc900041df000 [ 430.406503][ C0] R13: dffffc0000000000 R14: ffffc900041df008 R15: ffffc900041df00e [ 430.406515][ C0] FS: 0000000000000000(0000) GS:ffff888124fcf000(0000) knlGS:0000000000000000 [ 430.406528][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.406539][ C0] CR2: 00007ffdb5ad8108 CR3: 000000000eb38000 CR4: 00000000003526f0 [ 430.406553][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.406562][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.406572][ C0] Call Trace: [ 430.406578][ C0] [ 430.406584][ C0] bch2_inode_opts_get+0x95b/0x1250 [ 430.406610][ C0] bch2_move_get_io_opts_one+0x646/0xa10 [ 430.406634][ C0] ? bch2_move_get_io_opts_one+0x2f3/0xa10 [ 430.406660][ C0] ? __pfx_bch2_move_get_io_opts_one+0x10/0x10 [ 430.406688][ C0] ? bch2_trans_begin+0x1795/0x1d30 [ 430.406713][ C0] ? bch2_move_get_io_opts_one+0x2f3/0xa10 [ 430.406734][ C0] ? bch2_backpointer_get_key+0x398/0x680 [ 430.406755][ C0] ? bch2_backpointer_get_key+0x3a5/0x680 [ 430.406787][ C0] ? bch2_write_ref_put+0x5b/0x670 [ 430.406814][ C0] __bch2_move_data_phys+0x1241/0x2830 [ 430.406842][ C0] ? __bch2_move_data_phys+0x26d/0x2830 [ 430.406871][ C0] ? __pfx___bch2_move_data_phys+0x10/0x10 [ 430.406896][ C0] ? unwind_next_frame+0xb8/0x23b0 [ 430.406915][ C0] ? unwind_next_frame+0xb8/0x23b0 [ 430.406938][ C0] ? bch2_backpointer_get_key+0x22f/0x680 [ 430.406959][ C0] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 430.406987][ C0] ? __bch2_move_data_phys+0x26d/0x2830 [ 430.407009][ C0] ? ret_from_fork_asm+0x1a/0x30 [ 430.407039][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 430.407064][ C0] ? kasan_save_track+0x51/0x80 [ 430.407079][ C0] ? kasan_save_track+0x3f/0x80 [ 430.407093][ C0] ? __kasan_kmalloc+0x9d/0xb0 [ 430.407108][ C0] ? __kmalloc_cache_noprof+0x236/0x370 [ 430.407128][ C0] ? bch2_copygc+0x2fd9/0x4db0 [ 430.407151][ C0] ? bch2_copygc_thread+0x705/0xc00 [ 430.407173][ C0] ? kthread+0x7b7/0x940 [ 430.407189][ C0] ? ret_from_fork+0x4b/0x80 [ 430.407201][ C0] ? ret_from_fork_asm+0x1a/0x30 [ 430.407231][ C0] ? bch2_evacuate_bucket+0x14c/0x2e0 [ 430.407255][ C0] bch2_evacuate_bucket+0x1d9/0x2e0 [ 430.407277][ C0] ? __pfx_evacuate_bucket_pred+0x10/0x10 [ 430.407302][ C0] ? __pfx_bch2_evacuate_bucket+0x10/0x10 [ 430.407333][ C0] ? rht_lock+0x147/0x270 [ 430.407362][ C0] bch2_copygc+0x4058/0x4db0 [ 430.407392][ C0] ? bch2_copygc+0x457/0x4db0 [ 430.407437][ C0] ? __pfx_bch2_copygc+0x10/0x10 [ 430.407460][ C0] ? __lock_acquire+0xad5/0xd80 [ 430.407490][ C0] ? bch2_copygc_wait_amount+0x107/0xd00 [ 430.407518][ C0] ? bch2_copygc+0x457/0x4db0 [ 430.407541][ C0] ? bch2_copygc_wait_amount+0x107/0xd00 [ 430.407582][ C0] ? bch2_copygc+0x457/0x4db0 [ 430.407607][ C0] ? bch2_trans_srcu_unlock+0x459/0x5c0 [ 430.407636][ C0] bch2_copygc_thread+0x705/0xc00 [ 430.407667][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.407692][ C0] ? bch2_copygc_thread+0x1a3/0xc00 [ 430.407736][ C0] ? _raw_spin_unlock_irqrestore+0x90/0x140 [ 430.407760][ C0] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.407784][ C0] ? __kthread_parkme+0x1a8/0x200 [ 430.407811][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.407835][ C0] kthread+0x7b7/0x940 [ 430.407853][ C0] ? __pfx_bch2_copygc_thread+0x10/0x10 [ 430.407877][ C0] ? __pfx_kthread+0x10/0x10 [ 430.407893][ C0] ? __pfx_kthread+0x10/0x10 [ 430.407908][ C0] ? __pfx_kthread+0x10/0x10 [ 430.407924][ C0] ? __pfx_kthread+0x10/0x10 [ 430.407940][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.407962][ C0] ? lockdep_hardirqs_on+0x9d/0x150 [ 430.407982][ C0] ? __pfx_kthread+0x10/0x10 [ 430.407999][ C0] ret_from_fork+0x4b/0x80 [ 430.408012][ C0] ? __pfx_kthread+0x10/0x10 [ 430.408028][ C0] ret_from_fork_asm+0x1a/0x30 [ 430.408060][ C0] [ 430.408067][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.713 msecs [ 430.881755][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.888629][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) [ 430.900459][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 [ 430.910542][ T31] Call Trace: [ 430.913842][ T31] [ 430.916792][ T31] dump_stack_lvl+0x241/0x360 [ 430.921516][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.926746][ T31] ? __pfx__printk+0x10/0x10 [ 430.931412][ T31] ? vscnprintf+0x5d/0x90 [ 430.935777][ T31] panic+0x349/0x880 [ 430.939705][ T31] ? __pfx_preempt_schedule+0x10/0x10 [ 430.945115][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 430.951302][ T31] ? __pfx_panic+0x10/0x10 [ 430.955740][ T31] ? tick_nohz_tick_stopped+0x82/0xb0 [ 430.961150][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.966543][ T31] ? nmi_trigger_cpumask_backtrace+0x244/0x320 [ 430.972724][ T31] ? nmi_trigger_cpumask_backtrace+0x2d4/0x320 [ 430.978906][ T31] ? nmi_trigger_cpumask_backtrace+0x2d9/0x320 [ 430.985097][ T31] watchdog+0x1097/0x10a0 [ 430.989488][ T31] ? watchdog+0x1ea/0x10a0 [ 430.993943][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.998655][ T31] kthread+0x7b7/0x940 [ 431.002757][ T31] ? __pfx_watchdog+0x10/0x10 [ 431.007472][ T31] ? __pfx_kthread+0x10/0x10 [ 431.012196][ T31] ? __pfx_kthread+0x10/0x10 [ 431.016815][ T31] ? __pfx_kthread+0x10/0x10 [ 431.021433][ T31] ? __pfx_kthread+0x10/0x10 [ 431.026052][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 431.031280][ T31] ? lockdep_hardirqs_on+0x9d/0x150 [ 431.036503][ T31] ? __pfx_kthread+0x10/0x10 [ 431.041129][ T31] ret_from_fork+0x4b/0x80 [ 431.045558][ T31] ? __pfx_kthread+0x10/0x10 [ 431.050168][ T31] ret_from_fork_asm+0x1a/0x30 [ 431.054989][ T31] [ 431.058405][ T31] Kernel Offset: disabled [ 431.062734][ T31] Rebooting in 86400 seconds..