./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2250712982 <...> Warning: Permanently added '10.128.0.21' (ED25519) to the list of known hosts. execve("./syz-executor2250712982", ["./syz-executor2250712982"], 0x7ffdb3b33150 /* 10 vars */) = 0 brk(NULL) = 0x55555ffb1000 brk(0x55555ffb1d00) = 0x55555ffb1d00 arch_prctl(ARCH_SET_FS, 0x55555ffb1380) = 0 set_tid_address(0x55555ffb1650) = 5839 set_robust_list(0x55555ffb1660, 24) = 0 rseq(0x55555ffb1ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2250712982", 4096) = 28 getrandom("\x6a\xed\x2f\x4b\x5b\xf4\x60\x03", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555ffb1d00 brk(0x55555ffd2d00) = 0x55555ffd2d00 brk(0x55555ffd3000) = 0x55555ffd3000 mprotect(0x7f7b3ab41000, 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 5840 attached [pid 5840] set_robust_list(0x55555ffb1660, 24 [pid 5839] <... clone resumed>, child_tidptr=0x55555ffb1650) = 5840 [pid 5840] <... set_robust_list resumed>) = 0 [pid 5840] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5840] setpgid(0, 0) = 0 [pid 5840] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5840] write(3, "1000", 4) = 4 [pid 5840] close(3) = 0 [pid 5840] write(1, "executing program\n", 18executing program ) = 18 [pid 5840] memfd_create("syzkaller", 0) = 3 [pid 5840] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7b32600000 [pid 5840] 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 5840] munmap(0x7f7b32600000, 138412032) = 0 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5840] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5840] close(3) = 0 [pid 5840] close(4) = 0 [pid 5840] mkdir("./file0", 0777) = 0 [ 91.865962][ T5840] loop0: detected capacity change from 0 to 32768 [ 91.891294][ T5840] BTRFS: device fsid e417788f-7a09-42b2-9266-8ddc5d5d35d2 devid 1 transid 8 /dev/loop0 (7:0) scanned by syz-executor225 (5840) [ 91.931402][ T5840] BTRFS info (device loop0): first mount of filesystem e417788f-7a09-42b2-9266-8ddc5d5d35d2 [ 91.942199][ T5840] BTRFS info (device loop0): using xxhash64 (xxhash64-generic) checksum algorithm [ 91.951985][ T5840] BTRFS info (device loop0): disk space caching is enabled [ 91.959900][ T5840] BTRFS warning (device loop0): space cache v1 is being deprecated and will be removed in a future release, please use -o space_cache=v2 [ 92.047254][ T5840] BTRFS info (device loop0): rebuilding free space tree [ 92.078814][ T5840] BTRFS info (device loop0): disabling free space tree [pid 5840] mount("/dev/loop0", "./file0", "btrfs", MS_NOEXEC|MS_NOATIME|MS_REC|MS_RELATIME|MS_STRICTATIME, "compress-force,clear_cache,nodatasum,nossd,degraded,space_cache=v1,") = 0 [pid 5840] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5840] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5840] ioctl(4, LOOP_CLR_FD) = 0 [pid 5840] close(4) = 0 [ 92.095481][ T5840] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 92.115232][ T5840] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 92.166855][ T5840] BTRFS info (device loop0): balance: start -susage=34359738372,drange=7..2048,limit=0..6 [ 92.192279][ T5840] ------------[ cut here ]------------ [ 92.198709][ T5840] BTRFS: Transaction aborted (error -28) [ 92.225064][ T5840] WARNING: CPU: 0 PID: 5840 at fs/btrfs/block-group.c:2781 btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.236670][ T5840] Modules linked in: [ 92.240830][ T5840] CPU: 0 UID: 0 PID: 5840 Comm: syz-executor225 Not tainted 6.16.0-rc5-syzkaller-00276-g5d5d62298b8b #0 PREEMPT(full) [ 92.253475][ T5840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 92.263681][ T5840] RIP: 0010:btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.271121][ T5840] Code: 48 c7 c6 40 ac cf 8b 44 89 f2 e8 ab 97 44 fd e9 38 fe ff ff e8 71 a7 da fd 90 48 c7 c7 e0 ab cf 8b 44 89 f6 e8 71 8a 9e fd 90 <0f> 0b 90 90 e9 19 fe ff ff e8 52 a7 da fd eb 05 e8 4b a7 da fd 4c [ 92.291676][ T5840] RSP: 0018:ffffc9000416f6e0 EFLAGS: 00010246 [ 92.298588][ T5840] RAX: 2fd6007757e69800 RBX: ffff8880721a4001 RCX: ffff8880770c1e00 [ 92.306920][ T5840] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 [ 92.314988][ T5840] RBP: ffffc9000416f958 R08: 0000000000000003 R09: 0000000000000004 [ 92.323039][ T5840] R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: 0000000000000000 [ 92.331244][ T5840] R13: dffffc0000000000 R14: 00000000ffffffe4 R15: ffff88814d55d858 [ 92.340284][ T5840] FS: 000055555ffb1380(0000) GS:ffff888125c4f000(0000) knlGS:0000000000000000 [ 92.350260][ T5840] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.357250][ T5840] CR2: 00007f7b3ab450f8 CR3: 0000000072158000 CR4: 00000000003526f0 [ 92.366646][ T5840] Call Trace: [ 92.370493][ T5840] [ 92.373498][ T5840] ? kfree+0x18e/0x440 [ 92.377709][ T5840] ? __pfx___reserve_bytes+0x10/0x10 [ 92.383048][ T5840] ? __pfx_btrfs_create_pending_block_groups+0x10/0x10 [ 92.390063][ T5840] ? btrfs_inc_block_group_ro+0x639/0x6f0 [ 92.395915][ T5840] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 92.401840][ T5840] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 92.408714][ T5840] ? btrfs_trans_release_metadata+0x22d/0x330 [ 92.415219][ T5840] __btrfs_end_transaction+0x140/0x640 [ 92.420943][ T5840] btrfs_inc_block_group_ro+0x641/0x6f0 [ 92.426738][ T5840] btrfs_relocate_block_group+0x47a/0xde0 [ 92.432631][ T5840] btrfs_relocate_chunk+0x12a/0x3b0 [ 92.438187][ T5840] __btrfs_balance+0x1870/0x21d0 [ 92.443306][ T5840] ? btrfs_balance+0xc8c/0x11d0 [ 92.448330][ T5840] ? __pfx___btrfs_balance+0x10/0x10 [ 92.453772][ T5840] ? __pfx_mutex_unlock+0x10/0x10 [ 92.459056][ T5840] ? do_raw_spin_unlock+0x122/0x240 [ 92.464502][ T5840] btrfs_balance+0xc94/0x11d0 [ 92.469297][ T5840] btrfs_ioctl_balance+0x3d3/0x610 [ 92.475143][ T5840] ? btrfs_ioctl+0xb19/0xd00 [ 92.480013][ T5840] ? __pfx_btrfs_ioctl+0x10/0x10 [ 92.485205][ T5840] __se_sys_ioctl+0xfc/0x170 [ 92.490126][ T5840] do_syscall_64+0xfa/0x3b0 [ 92.494754][ T5840] ? lockdep_hardirqs_on+0x9c/0x150 [ 92.501722][ T5840] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.508580][ T5840] ? clear_bhb_loop+0x60/0xb0 [ 92.513506][ T5840] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.519687][ T5840] RIP: 0033:0x7f7b3aac8d69 [ 92.524388][ T5840] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 92.544308][ T5840] RSP: 002b:00007fffc90cc408 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 92.552881][ T5840] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7b3aac8d69 [ 92.562142][ T5840] RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003 [ 92.570424][ T5840] RBP: 0000000000000000 R08: 0000000000000000 R09: 000055555ffb24c0 [ 92.578772][ T5840] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffc90cc430 [ 92.586835][ T5840] R13: 00007f7b3aaa9b14 R14: 431bde82d7b634db R15: 00007f7b3ab1201d [ 92.595193][ T5840] [ 92.598364][ T5840] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 92.607067][ T5840] CPU: 0 UID: 0 PID: 5840 Comm: syz-executor225 Not tainted 6.16.0-rc5-syzkaller-00276-g5d5d62298b8b #0 PREEMPT(full) [ 92.619762][ T5840] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 92.629928][ T5840] Call Trace: [ 92.633244][ T5840] [ 92.636390][ T5840] dump_stack_lvl+0x99/0x250 [ 92.641107][ T5840] ? __asan_memcpy+0x40/0x70 [ 92.645904][ T5840] ? __pfx_dump_stack_lvl+0x10/0x10 [ 92.651705][ T5840] ? __pfx__printk+0x10/0x10 [ 92.656439][ T5840] panic+0x2db/0x790 [ 92.660373][ T5840] ? __pfx_panic+0x10/0x10 [ 92.665005][ T5840] ? show_trace_log_lvl+0x4fb/0x550 [ 92.670282][ T5840] __warn+0x31b/0x4b0 [ 92.674439][ T5840] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.681253][ T5840] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.687960][ T5840] report_bug+0x2be/0x4f0 [ 92.692416][ T5840] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.699211][ T5840] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.705951][ T5840] ? btrfs_create_pending_block_groups+0x1122/0x1360 [ 92.712667][ T5840] handle_bug+0x84/0x160 [ 92.716946][ T5840] exc_invalid_op+0x1a/0x50 [ 92.721474][ T5840] asm_exc_invalid_op+0x1a/0x20 [ 92.726398][ T5840] RIP: 0010:btrfs_create_pending_block_groups+0x1120/0x1360 [ 92.733812][ T5840] Code: 48 c7 c6 40 ac cf 8b 44 89 f2 e8 ab 97 44 fd e9 38 fe ff ff e8 71 a7 da fd 90 48 c7 c7 e0 ab cf 8b 44 89 f6 e8 71 8a 9e fd 90 <0f> 0b 90 90 e9 19 fe ff ff e8 52 a7 da fd eb 05 e8 4b a7 da fd 4c [ 92.753494][ T5840] RSP: 0018:ffffc9000416f6e0 EFLAGS: 00010246 [ 92.759594][ T5840] RAX: 2fd6007757e69800 RBX: ffff8880721a4001 RCX: ffff8880770c1e00 [ 92.767589][ T5840] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 [ 92.775594][ T5840] RBP: ffffc9000416f958 R08: 0000000000000003 R09: 0000000000000004 [ 92.783595][ T5840] R10: dffffc0000000000 R11: fffffbfff1bfaa6c R12: 0000000000000000 [ 92.791618][ T5840] R13: dffffc0000000000 R14: 00000000ffffffe4 R15: ffff88814d55d858 [ 92.799652][ T5840] ? kfree+0x18e/0x440 [ 92.803754][ T5840] ? __pfx___reserve_bytes+0x10/0x10 [ 92.809058][ T5840] ? __pfx_btrfs_create_pending_block_groups+0x10/0x10 [ 92.815936][ T5840] ? btrfs_inc_block_group_ro+0x639/0x6f0 [ 92.821764][ T5840] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 92.827447][ T5840] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 92.833445][ T5840] ? btrfs_trans_release_metadata+0x22d/0x330 [ 92.839541][ T5840] __btrfs_end_transaction+0x140/0x640 [ 92.845032][ T5840] btrfs_inc_block_group_ro+0x641/0x6f0 [ 92.850609][ T5840] btrfs_relocate_block_group+0x47a/0xde0 [ 92.856369][ T5840] btrfs_relocate_chunk+0x12a/0x3b0 [ 92.861746][ T5840] __btrfs_balance+0x1870/0x21d0 [ 92.866744][ T5840] ? btrfs_balance+0xc8c/0x11d0 [ 92.871634][ T5840] ? __pfx___btrfs_balance+0x10/0x10 [ 92.876941][ T5840] ? __pfx_mutex_unlock+0x10/0x10 [ 92.882005][ T5840] ? do_raw_spin_unlock+0x122/0x240 [ 92.887429][ T5840] btrfs_balance+0xc94/0x11d0 [ 92.892173][ T5840] btrfs_ioctl_balance+0x3d3/0x610 [ 92.897489][ T5840] ? btrfs_ioctl+0xb19/0xd00 [ 92.902318][ T5840] ? __pfx_btrfs_ioctl+0x10/0x10 [ 92.907711][ T5840] __se_sys_ioctl+0xfc/0x170 [ 92.912416][ T5840] do_syscall_64+0xfa/0x3b0 [ 92.916958][ T5840] ? lockdep_hardirqs_on+0x9c/0x150 [ 92.922239][ T5840] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.928438][ T5840] ? clear_bhb_loop+0x60/0xb0 [ 92.933242][ T5840] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.939313][ T5840] RIP: 0033:0x7f7b3aac8d69 [ 92.943760][ T5840] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 92.963486][ T5840] RSP: 002b:00007fffc90cc408 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 92.972102][ T5840] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f7b3aac8d69 [ 92.980116][ T5840] RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003 [ 92.988211][ T5840] RBP: 0000000000000000 R08: 0000000000000000 R09: 000055555ffb24c0 [ 92.996202][ T5840] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffc90cc430 [ 93.004243][ T5840] R13: 00007f7b3aaa9b14 R14: 431bde82d7b634db R15: 00007f7b3ab1201d [ 93.012271][ T5840] [ 93.015621][ T5840] Kernel Offset: disabled [ 93.019980][ T5840] Rebooting in 86400 seconds..