./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4099230563 <...> Warning: Permanently added '10.128.1.178' (ED25519) to the list of known hosts. execve("./syz-executor4099230563", ["./syz-executor4099230563"], 0x7ffd110409a0 /* 10 vars */) = 0 brk(NULL) = 0x5555761e6000 brk(0x5555761e6d00) = 0x5555761e6d00 arch_prctl(ARCH_SET_FS, 0x5555761e6380) = 0 set_tid_address(0x5555761e6650) = 5841 set_robust_list(0x5555761e6660, 24) = 0 rseq(0x5555761e6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4099230563", 4096) = 28 getrandom("\x9d\x81\xbf\xca\xa9\xdd\x02\x00", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555761e6d00 brk(0x555576207d00) = 0x555576207d00 brk(0x555576208000) = 0x555576208000 mprotect(0x7fa0b500c000, 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 5842 attached [pid 5842] set_robust_list(0x5555761e6660, 24) = 0 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5841] <... clone resumed>, child_tidptr=0x5555761e6650) = 5842 [pid 5842] <... prctl resumed>) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 executing program [pid 5842] write(1, "executing program\n", 18) = 18 [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa0aca00000 [pid 5842] 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 5842] munmap(0x7fa0aca00000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5842] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5842] close(3) = 0 [pid 5842] close(4) = 0 [pid 5842] mkdir("./file0", 0777) = 0 [ 95.637710][ T5842] loop0: detected capacity change from 0 to 32768 [ 95.674666][ T5842] BTRFS: device fsid e417788f-7a09-42b2-9266-8ddc5d5d35d2 devid 1 transid 8 /dev/loop0 (7:0) scanned by syz-executor409 (5842) [ 95.719004][ T5842] BTRFS info (device loop0): first mount of filesystem e417788f-7a09-42b2-9266-8ddc5d5d35d2 [ 95.730546][ T5842] BTRFS info (device loop0): using xxhash64 (xxhash64-generic) checksum algorithm [ 95.742504][ T5842] BTRFS info (device loop0): disk space caching is enabled [ 95.749903][ T5842] BTRFS warning (device loop0): space cache v1 is being deprecated and will be removed in a future release, please use -o space_cache=v2 [ 95.842481][ T5842] BTRFS info (device loop0): rebuilding free space tree [ 95.874099][ T5842] BTRFS info (device loop0): disabling free space tree [ 95.881583][ T5842] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [pid 5842] 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 5842] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5842] ioctl(4, LOOP_CLR_FD) = 0 [ 95.892935][ T5842] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [pid 5842] close(4) = 0 [ 95.980310][ T5842] BTRFS info (device loop0): balance: start -susage=34359738372,drange=7..526332,limit=0..6 [ 95.996908][ T5842] ------------[ cut here ]------------ [ 96.003055][ T5842] BTRFS: Transaction aborted (error -28) [ 96.010283][ T5842] WARNING: CPU: 0 PID: 5842 at fs/btrfs/block-group.c:2781 btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.022377][ T5842] Modules linked in: [ 96.026568][ T5842] CPU: 0 UID: 0 PID: 5842 Comm: syz-executor409 Not tainted 6.16.0-rc4-syzkaller-00123-g4c06e63b9203 #0 PREEMPT(full) [ 96.041067][ T5842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 96.051727][ T5842] RIP: 0010:btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.059510][ T5842] Code: 48 c7 c6 40 a1 cf 8b 44 89 f2 e8 6b 6c 44 fd e9 38 fe ff ff e8 f1 a6 da fd 90 48 c7 c7 e0 a0 cf 8b 44 89 f6 e8 a1 4f 9e fd 90 <0f> 0b 90 90 e9 19 fe ff ff e8 d2 a6 da fd eb 05 e8 cb a6 da fd 4c [ 96.079837][ T5842] RSP: 0018:ffffc9000418f6e0 EFLAGS: 00010246 [ 96.086495][ T5842] RAX: b7de7e768d7b7400 RBX: ffff888072f08001 RCX: ffff8880330f1e00 [ 96.094989][ T5842] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 [ 96.103495][ T5842] RBP: ffffc9000418f958 R08: 0000000000000003 R09: 0000000000000004 [ 96.111857][ T5842] R10: dffffc0000000000 R11: fffffbfff1bfa9fc R12: 0000000000000000 [ 96.119897][ T5842] R13: dffffc0000000000 R14: 00000000ffffffe4 R15: ffff888026fff858 [ 96.127995][ T5842] FS: 00005555761e6380(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 [ 96.137037][ T5842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 96.143753][ T5842] CR2: 00007f28a29cd000 CR3: 0000000074af6000 CR4: 00000000003526f0 [ 96.151889][ T5842] Call Trace: [ 96.155232][ T5842] [ 96.158235][ T5842] ? kfree+0x18e/0x440 [ 96.162461][ T5842] ? __pfx___reserve_bytes+0x10/0x10 [ 96.167853][ T5842] ? __pfx_btrfs_create_pending_block_groups+0x10/0x10 [ 96.174886][ T5842] ? btrfs_inc_block_group_ro+0x639/0x6f0 [ 96.180801][ T5842] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 96.186630][ T5842] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 96.192726][ T5842] ? btrfs_trans_release_metadata+0x22d/0x330 [ 96.198908][ T5842] __btrfs_end_transaction+0x140/0x640 [ 96.204522][ T5842] btrfs_inc_block_group_ro+0x641/0x6f0 [ 96.210141][ T5842] btrfs_relocate_block_group+0x47a/0xde0 [ 96.216038][ T5842] btrfs_relocate_chunk+0x12a/0x3b0 [ 96.221372][ T5842] __btrfs_balance+0x1870/0x21d0 [ 96.226421][ T5842] ? btrfs_balance+0xc8c/0x11d0 [ 96.231414][ T5842] ? __pfx___btrfs_balance+0x10/0x10 [ 96.236777][ T5842] ? __wait_for_common+0x6f0/0x710 [ 96.242027][ T5842] ? do_raw_spin_unlock+0x122/0x240 [ 96.247301][ T5842] btrfs_balance+0xc94/0x11d0 [ 96.252111][ T5842] btrfs_ioctl_balance+0x3d3/0x610 [ 96.257299][ T5842] ? btrfs_ioctl+0xb19/0xd00 [ 96.262120][ T5842] ? __pfx_btrfs_ioctl+0x10/0x10 [ 96.267189][ T5842] __se_sys_ioctl+0xfc/0x170 [ 96.271903][ T5842] do_syscall_64+0xfa/0x3b0 [ 96.276470][ T5842] ? lockdep_hardirqs_on+0x9c/0x150 [ 96.281821][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 96.287948][ T5842] ? clear_bhb_loop+0x60/0xb0 [ 96.292750][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 96.298714][ T5842] RIP: 0033:0x7fa0b4f93d69 [ 96.303377][ T5842] 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 [ 96.323082][ T5842] RSP: 002b:00007fff51d695f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 96.331576][ T5842] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa0b4f93d69 [ 96.339597][ T5842] RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003 [ 96.348535][ T5842] RBP: 0000000000000000 R08: 0000000000000000 R09: 00005555761e74c0 [ 96.356703][ T5842] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 96.365434][ T5842] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 96.374472][ T5842] [ 96.377603][ T5842] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 96.385330][ T5842] CPU: 0 UID: 0 PID: 5842 Comm: syz-executor409 Not tainted 6.16.0-rc4-syzkaller-00123-g4c06e63b9203 #0 PREEMPT(full) [ 96.398027][ T5842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 96.408125][ T5842] Call Trace: [ 96.411554][ T5842] [ 96.414518][ T5842] dump_stack_lvl+0x99/0x250 [ 96.419164][ T5842] ? __asan_memcpy+0x40/0x70 [ 96.423800][ T5842] ? __pfx_dump_stack_lvl+0x10/0x10 [ 96.429047][ T5842] ? __pfx__printk+0x10/0x10 [ 96.433706][ T5842] panic+0x2db/0x790 [ 96.437672][ T5842] ? __pfx_panic+0x10/0x10 [ 96.442132][ T5842] ? show_trace_log_lvl+0x4fb/0x550 [ 96.447418][ T5842] __warn+0x31b/0x4b0 [ 96.451445][ T5842] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.458183][ T5842] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.464904][ T5842] report_bug+0x2be/0x4f0 [ 96.469285][ T5842] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.475989][ T5842] ? btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.482688][ T5842] ? btrfs_create_pending_block_groups+0x1122/0x1360 [ 96.489384][ T5842] handle_bug+0x84/0x160 [ 96.493863][ T5842] exc_invalid_op+0x1a/0x50 [ 96.498397][ T5842] asm_exc_invalid_op+0x1a/0x20 [ 96.503272][ T5842] RIP: 0010:btrfs_create_pending_block_groups+0x1120/0x1360 [ 96.510577][ T5842] Code: 48 c7 c6 40 a1 cf 8b 44 89 f2 e8 6b 6c 44 fd e9 38 fe ff ff e8 f1 a6 da fd 90 48 c7 c7 e0 a0 cf 8b 44 89 f6 e8 a1 4f 9e fd 90 <0f> 0b 90 90 e9 19 fe ff ff e8 d2 a6 da fd eb 05 e8 cb a6 da fd 4c [ 96.530226][ T5842] RSP: 0018:ffffc9000418f6e0 EFLAGS: 00010246 [ 96.536337][ T5842] RAX: b7de7e768d7b7400 RBX: ffff888072f08001 RCX: ffff8880330f1e00 [ 96.544339][ T5842] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 [ 96.552528][ T5842] RBP: ffffc9000418f958 R08: 0000000000000003 R09: 0000000000000004 [ 96.560532][ T5842] R10: dffffc0000000000 R11: fffffbfff1bfa9fc R12: 0000000000000000 [ 96.568652][ T5842] R13: dffffc0000000000 R14: 00000000ffffffe4 R15: ffff888026fff858 [ 96.576688][ T5842] ? kfree+0x18e/0x440 [ 96.580839][ T5842] ? __pfx___reserve_bytes+0x10/0x10 [ 96.586286][ T5842] ? __pfx_btrfs_create_pending_block_groups+0x10/0x10 [ 96.593174][ T5842] ? btrfs_inc_block_group_ro+0x639/0x6f0 [ 96.599024][ T5842] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 96.604874][ T5842] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 96.611189][ T5842] ? btrfs_trans_release_metadata+0x22d/0x330 [ 96.617295][ T5842] __btrfs_end_transaction+0x140/0x640 [ 96.622876][ T5842] btrfs_inc_block_group_ro+0x641/0x6f0 [ 96.628540][ T5842] btrfs_relocate_block_group+0x47a/0xde0 [ 96.634302][ T5842] btrfs_relocate_chunk+0x12a/0x3b0 [ 96.639595][ T5842] __btrfs_balance+0x1870/0x21d0 [ 96.644579][ T5842] ? btrfs_balance+0xc8c/0x11d0 [ 96.649474][ T5842] ? __pfx___btrfs_balance+0x10/0x10 [ 96.654785][ T5842] ? __wait_for_common+0x6f0/0x710 [ 96.659951][ T5842] ? do_raw_spin_unlock+0x122/0x240 [ 96.665281][ T5842] btrfs_balance+0xc94/0x11d0 [ 96.670186][ T5842] btrfs_ioctl_balance+0x3d3/0x610 [ 96.675327][ T5842] ? btrfs_ioctl+0xb19/0xd00 [ 96.679968][ T5842] ? __pfx_btrfs_ioctl+0x10/0x10 [ 96.685057][ T5842] __se_sys_ioctl+0xfc/0x170 [ 96.689677][ T5842] do_syscall_64+0xfa/0x3b0 [ 96.694204][ T5842] ? lockdep_hardirqs_on+0x9c/0x150 [ 96.699480][ T5842] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 96.705591][ T5842] ? clear_bhb_loop+0x60/0xb0 [ 96.710307][ T5842] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 96.716283][ T5842] RIP: 0033:0x7fa0b4f93d69 [ 96.720837][ T5842] 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 [ 96.741288][ T5842] RSP: 002b:00007fff51d695f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 96.749850][ T5842] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa0b4f93d69 [ 96.758131][ T5842] RDX: 0000200000000440 RSI: 00000000c4009420 RDI: 0000000000000003 [ 96.766323][ T5842] RBP: 0000000000000000 R08: 0000000000000000 R09: 00005555761e74c0 [ 96.774371][ T5842] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 96.782742][ T5842] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 96.790967][ T5842] [ 96.794444][ T5842] Kernel Offset: disabled [ 96.798817][ T5842] Rebooting in 86400 seconds..