./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2740593796 <...> Warning: Permanently added '10.128.1.33' (ED25519) to the list of known hosts. execve("./syz-executor2740593796", ["./syz-executor2740593796"], 0x7ffe07bab2d0 /* 10 vars */) = 0 brk(NULL) = 0x55556c484000 brk(0x55556c484d00) = 0x55556c484d00 arch_prctl(ARCH_SET_FS, 0x55556c484380) = 0 set_tid_address(0x55556c484650) = 5821 set_robust_list(0x55556c484660, 24) = 0 rseq(0x55556c484ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2740593796", 4096) = 28 getrandom("\x58\xf4\x1b\xaf\x7f\x62\xb1\x49", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556c484d00 brk(0x55556c4a5d00) = 0x55556c4a5d00 brk(0x55556c4a6000) = 0x55556c4a6000 mprotect(0x7fc37089c000, 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=0x55556c484650) = 5823 ./strace-static-x86_64: Process 5823 attached [pid 5823] set_robust_list(0x55556c484660, 24) = 0 [pid 5823] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5823] setpgid(0, 0) = 0 [pid 5823] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5823] write(3, "1000", 4) = 4 [pid 5823] close(3) = 0 [pid 5823] write(1, "executing program\n", 18executing program ) = 18 [pid 5823] memfd_create("syzkaller", 0) = 3 [pid 5823] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fc368200000 [pid 5823] 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 5823] munmap(0x7fc368200000, 138412032) = 0 [pid 5823] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5823] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5823] close(3) = 0 [pid 5823] close(4) = 0 [pid 5823] mkdir("./file0", 0777) = 0 [ 87.662480][ T5823] loop0: detected capacity change from 0 to 32768 [ 87.709905][ T5823] bcachefs (loop0): Using encoding defined by superblock: utf8-12.1.0 [ 87.747682][ T5823] bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,erasure_code,degraded=yes,no_splitbrain_check,fsck,norecovery,nojournal_transaction_names,reconstruct_alloc,nocow [ 87.747682][ T5823] allowing incompatible features above 0.0: (unknown version) [ 87.747682][ T5823] features: lz4,new_siphash,inline_data,new_extent_overwrite,btree_ptr_v2,new_varint,journal_no_flush,alloc_v2,extents_across_btree_nodes [ 87.792278][ T5823] bcachefs (loop0): recovering from clean shutdown, journal seq 10 [ 87.800388][ T5823] bcachefs (loop0): Version upgrade required: [ 87.800388][ T5823] Version upgrade from 0.24: unwritten_extents to 1.7: mi_btree_bitmap incomplete [ 87.800388][ T5823] Doing incompatible version upgrade from 0.24: unwritten_extents to 1.28: inode_has_case_insensitive [ 87.800388][ T5823] running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,check_rebalance_work,set_fs_needs_rebalance [ 87.874401][ T5823] bcachefs (loop0): dropping and reconstructing all alloc info [ 87.899443][ T5823] bcachefs (loop0): accounting_read... done [pid 5823] mount("/dev/loop0", "./file0", "bcachefs", MS_POSIXACL, "fsck,inline_data,nocow,degraded,str_hash=siphash,norecovery,discard,reconstruct_alloc,erasure_code,a"...) = 0 [pid 5823] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5823] chdir("./file0") = 0 [pid 5823] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5823] ioctl(4, LOOP_CLR_FD) = 0 [pid 5823] close(4) = 0 [ 87.906635][ T5823] bcachefs (loop0): alloc_read... done [ 87.912500][ T5823] bcachefs (loop0): snapshots_read... done [ 87.919509][ T5823] bcachefs (loop0): done starting filesystem [pid 5823] openat(AT_FDCWD, "./file0/file0", O_RDONLY|O_NOCTTY|O_SYNC) = 4 [pid 5823] ioctl(4, _IOC(_IOC_WRITE, 0xbc, 0xa, 0x70), 0x200000000340) = 5 [pid 5823] exit_group(0) = ? [ 87.986873][ T5828] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 87.994728][ T5828] #PF: supervisor instruction fetch in kernel mode [ 88.001246][ T5828] #PF: error_code(0x0010) - not-present page [ 88.007238][ T5828] PGD 0 P4D 0 [ 88.010663][ T5828] Oops: Oops: 0010 [#1] SMP KASAN PTI [ 88.016071][ T5828] CPU: 1 UID: 0 PID: 5828 Comm: syz-executor274 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) [ 88.028151][ T5828] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 88.038213][ T5828] RIP: 0010:0x0 [ 88.041707][ T5828] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 88.049068][ T5828] RSP: 0018:ffffc9000435edb8 EFLAGS: 00010246 [ 88.055130][ T5828] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff888077f03ee8 [ 88.063097][ T5828] RDX: 1ffff1100efe07dd RSI: 0000000000000000 RDI: 0000000000092800 [ 88.071060][ T5828] RBP: ffffc9000435ef10 R08: ffffc9000435ee87 R09: 0000000000000000 [ 88.079028][ T5828] R10: ffffc9000435ee60 R11: 0000000000000000 R12: 1ffff9200086bdc8 [ 88.086994][ T5828] R13: ffff888077f03ee8 R14: 0000000000092c40 R15: 0000000000092800 [ 88.094955][ T5828] FS: 0000000000000000(0000) GS:ffff888125d99000(0000) knlGS:0000000000000000 [ 88.103872][ T5828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.110446][ T5828] CR2: ffffffffffffffd6 CR3: 0000000077cc2000 CR4: 00000000003526f0 [ 88.118415][ T5828] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.126376][ T5828] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.134343][ T5828] Call Trace: [ 88.137641][ T5828] [ 88.140567][ T5828] mempool_alloc_noprof+0x1a4/0x510 [ 88.145779][ T5828] ? __trans_next_path_with_node+0x454/0x4d0 [ 88.151782][ T5828] ? __pfx_mempool_alloc_noprof+0x10/0x10 [ 88.157501][ T5828] ? bch2_btree_update_start+0x51e/0x1480 [ 88.163221][ T5828] ? __pfx_down_read_trylock+0x10/0x10 [ 88.168696][ T5828] ? bch2_btree_path_traverse_one+0x1b62/0x2460 [ 88.174956][ T5828] bch2_btree_update_start+0x549/0x1480 [ 88.180504][ T5828] ? bch2_btree_path_traverse_one+0x9e8/0x2460 [ 88.186667][ T5828] ? __pfx_bch2_btree_update_start+0x10/0x10 [ 88.192645][ T5828] ? __bch2_btree_path_set_pos+0xe0c/0x1530 [ 88.198538][ T5828] ? __pfx_bch2_btree_path_traverse_one+0x10/0x10 [ 88.204954][ T5828] ? __pfx___bch2_btree_path_set_pos+0x10/0x10 [ 88.211115][ T5828] ? bch2_btree_iter_peek_node+0x566/0xbc0 [ 88.216930][ T5828] ? bch2_btree_iter_verify+0x1d/0x360 [ 88.222401][ T5828] bch2_btree_node_rewrite+0x17e/0x1120 [ 88.227952][ T5828] ? rewrite_old_nodes_pred+0x408/0x550 [ 88.233494][ T5828] ? bch2_move_btree+0x6a8/0xc70 [ 88.238464][ T5828] bch2_move_btree+0x6f0/0xc70 [ 88.243224][ T5828] ? sched_clock+0x3f/0x60 [ 88.247649][ T5828] ? __pfx_rewrite_old_nodes_pred+0x10/0x10 [ 88.253545][ T5828] ? __pfx_bch2_move_btree+0x10/0x10 [ 88.258839][ T5828] ? psi_group_change+0xbc7/0x1210 [ 88.263951][ T5828] ? rcu_read_lock_sched_held+0x89/0x100 [ 88.269586][ T5828] ? dl_server_start+0xe5/0x280 [ 88.274437][ T5828] ? psi_task_change+0xe5/0x250 [ 88.279291][ T5828] ? bch2_move_btree+0x23f/0xc70 [ 88.284240][ T5828] ? format_decode+0x5ee/0xe30 [ 88.289017][ T5828] ? string+0x279/0x2b0 [ 88.293175][ T5828] ? widen_string+0x3b/0x2a0 [ 88.297769][ T5828] ? bch2_move_btree+0x44e/0xc70 [ 88.302716][ T5828] ? scnprintf+0x109/0x170 [ 88.307136][ T5828] bch2_scan_old_btree_nodes+0x95/0x240 [ 88.312689][ T5828] bch2_data_job+0x646/0x910 [ 88.317281][ T5828] ? __pfx_bch2_data_job+0x10/0x10 [ 88.322402][ T5828] ? kvm_sched_clock_read+0x11/0x20 [ 88.327608][ T5828] ? sched_clock+0x3f/0x60 [ 88.332030][ T5828] ? sched_clock_cpu+0x74/0x430 [ 88.336882][ T5828] ? psi_task_switch+0x39e/0x6d0 [ 88.341824][ T5828] ? __switch_to+0xd74/0x1600 [ 88.346516][ T5828] ? __lock_acquire+0xab9/0xd20 [ 88.351402][ T5828] ? finish_task_switch+0x18b/0x950 [ 88.356598][ T5828] ? finish_task_switch+0x266/0x950 [ 88.361880][ T5828] ? lockdep_hardirqs_on+0x9c/0x150 [ 88.367078][ T5828] ? rcu_is_watching+0x15/0xb0 [ 88.371844][ T5828] ? trace_sched_exit_tp+0x38/0x120 [ 88.377037][ T5828] ? __lock_acquire+0xab9/0xd20 [ 88.381884][ T5828] ? do_raw_spin_lock+0x121/0x290 [ 88.386918][ T5828] ? _raw_spin_unlock_irqrestore+0x85/0x110 [ 88.392830][ T5828] ? lockdep_hardirqs_on+0x9c/0x150 [ 88.398019][ T5828] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 88.403913][ T5828] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 88.410238][ T5828] bch2_data_thread+0x8f/0x1d0 [ 88.414998][ T5828] kthread+0x711/0x8a0 [ 88.419069][ T5828] ? __pfx_bch2_data_thread+0x10/0x10 [ 88.424439][ T5828] ? __pfx_kthread+0x10/0x10 [ 88.429029][ T5828] ? _raw_spin_unlock_irq+0x23/0x50 [ 88.434230][ T5828] ? lockdep_hardirqs_on+0x9c/0x150 [ 88.439442][ T5828] ? __pfx_kthread+0x10/0x10 [ 88.444041][ T5828] ret_from_fork+0x3fc/0x770 [ 88.448629][ T5828] ? __pfx_ret_from_fork+0x10/0x10 [ 88.453739][ T5828] ? __switch_to_asm+0x39/0x70 [ 88.458500][ T5828] ? __switch_to_asm+0x33/0x70 [ 88.463260][ T5828] ? __pfx_kthread+0x10/0x10 [ 88.467872][ T5828] ret_from_fork_asm+0x1a/0x30 [ 88.472658][ T5828] [ 88.475675][ T5828] Modules linked in: [ 88.479584][ T5828] CR2: 0000000000000000 [ 88.483735][ T5828] ---[ end trace 0000000000000000 ]--- [ 88.489188][ T5828] RIP: 0010:0x0 [ 88.492648][ T5828] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 88.500009][ T5828] RSP: 0018:ffffc9000435edb8 EFLAGS: 00010246 [ 88.506078][ T5828] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff888077f03ee8 [ 88.514040][ T5828] RDX: 1ffff1100efe07dd RSI: 0000000000000000 RDI: 0000000000092800 [ 88.522013][ T5828] RBP: ffffc9000435ef10 R08: ffffc9000435ee87 R09: 0000000000000000 [ 88.529980][ T5828] R10: ffffc9000435ee60 R11: 0000000000000000 R12: 1ffff9200086bdc8 [ 88.537945][ T5828] R13: ffff888077f03ee8 R14: 0000000000092c40 R15: 0000000000092800 [ 88.545910][ T5828] FS: 0000000000000000(0000) GS:ffff888125d99000(0000) knlGS:0000000000000000 [ 88.554835][ T5828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.561432][ T5828] CR2: ffffffffffffffd6 CR3: 0000000077cc2000 CR4: 00000000003526f0 [ 88.569404][ T5828] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.577369][ T5828] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.585330][ T5828] Kernel panic - not syncing: Fatal exception [ 88.591739][ T5828] Kernel Offset: disabled [ 88.596057][ T5828] Rebooting in 86400 seconds..