./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1402691401 <...> Warning: Permanently added '10.128.0.17' (ED25519) to the list of known hosts. execve("./syz-executor1402691401", ["./syz-executor1402691401"], 0x7ffe56d5f990 /* 10 vars */) = 0 brk(NULL) = 0x55557a5eb000 brk(0x55557a5ebd40) = 0x55557a5ebd40 arch_prctl(ARCH_SET_FS, 0x55557a5eb3c0) = 0 set_tid_address(0x55557a5eb690) = 289 set_robust_list(0x55557a5eb6a0, 24) = 0 rseq(0x55557a5ebce0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1402691401", 4096) = 28 getrandom("\xad\x49\x6d\x6e\x1c\x51\xe5\xc4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557a5ebd40 brk(0x55557a60cd40) = 0x55557a60cd40 brk(0x55557a60d000) = 0x55557a60d000 mprotect(0x7f351d9b2000, 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 mkdir("./syzkaller.AILJEa", 0700) = 0 chmod("./syzkaller.AILJEa", 0777) = 0 chdir("./syzkaller.AILJEa") = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55557a5eb690) = 290 ./strace-static-x86_64: Process 290 attached [pid 290] set_robust_list(0x55557a5eb6a0, 24) = 0 [pid 290] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 290] getppid() = 0 [pid 290] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 290] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 290] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 290] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 290] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 290] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 290] unshare(CLONE_NEWNS) = 0 [pid 290] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 290] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 290] unshare(CLONE_NEWCGROUP) = 0 [pid 290] unshare(CLONE_NEWUTS) = 0 [pid 290] unshare(CLONE_SYSVSEM) = 0 [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 290] getpid() = 1 [pid 290] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< {parent_tid=[3]}, 88) = 3 [pid 303] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 303] futex(0x7f351d9b86e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 303] futex(0x7f351d9b86ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000}./strace-static-x86_64: Process 304 attached [pid 304] set_robust_list(0x7f351d8e99a0, 24) = 0 [pid 304] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 304] memfd_create("syzkaller", 0) = 3 [pid 304] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f35154c9000 [pid 304] 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"..., 1048576) = 1048576 [pid 304] munmap(0x7f35154c9000, 138412032) = 0 [pid 304] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 304] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 304] close(3) = 0 [pid 304] close(4) = 0 [pid 304] mkdir("./file0", 0777) = 0 [ 30.025296][ T290] request_module fs-gadgetfs succeeded, but still no fs? [ 30.047655][ T28] audit: type=1400 audit(1755296403.922:72): avc: denied { mounton } for pid=290 comm="syz-executor140" path="/root/syzkaller.AILJEa/syz-tmp/newroot/dev" dev="tmpfs" ino=3 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_tmpfs_t tclass=dir permissive=1 [ 30.081514][ T304] loop0: detected capacity change from 0 to 2048 [pid 304] mount("/dev/loop0", "./file0", "ext4", MS_DIRSYNC|MS_NOATIME|MS_LAZYTIME, "jqfmt=vfsv0,norecovery,,errors=continue") = 0 [pid 304] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 304] chdir("./file0") = 0 [pid 304] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 304] ioctl(4, LOOP_CLR_FD) = 0 [pid 304] close(4) = 0 [pid 304] futex(0x7f351d9b86ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 303] <... futex resumed>) = 0 [pid 303] futex(0x7f351d9b86e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 303] futex(0x7f351d9b86ec, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 304] <... futex resumed>) = 1 [pid 304] openat(AT_FDCWD, "blkio.bfq.avg_queue_size", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [pid 304] futex(0x7f351d9b86ec, FUTEX_WAKE_PRIVATE, 1000000 [pid 303] <... futex resumed>) = 0 [pid 303] futex(0x7f351d9b86e8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 303] futex(0x7f351d9b86fc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 303] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f351d8a8000 [pid 303] mprotect(0x7f351d8a9000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 303] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 303] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f351d8c8990, parent_tid=0x7f351d8c8990, exit_signal=0, stack=0x7f351d8a8000, stack_size=0x20300, tls=0x7f351d8c86c0}./strace-static-x86_64: Process 308 attached => {parent_tid=[4]}, 88) = 4 [pid 308] set_robust_list(0x7f351d8c89a0, 24) = 0 [pid 303] rt_sigprocmask(SIG_SETMASK, [], [pid 308] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 303] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 308] write(4, "0x0000000000000000", 18 [pid 303] futex(0x7f351d9b86f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 308] <... write resumed>) = 18 [pid 303] futex(0x7f351d9b86fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 308] futex(0x7f351d9b86fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 303] <... futex resumed>) = 0 [pid 303] futex(0x7f351d9b86f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 303] futex(0x7f351d9b86fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 308] mmap(0x200000000000, 11755520, PROT_WRITE|PROT_EXEC, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 4, 0 [pid 304] <... futex resumed>) = 1 [pid 304] write(4, "0x0000000000000000", 18 [pid 308] <... mmap resumed>) = 0x200000000000 [pid 308] futex(0x7f351d9b86fc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 303] <... futex resumed>) = 0 [pid 308] futex(0x7f351d9b86f8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 303] futex(0x7f351d9b86f8, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 303] futex(0x7f351d9b86fc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 308] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [ 30.087997][ T28] audit: type=1400 audit(1755296403.922:73): avc: denied { mount } for pid=290 comm="syz-executor140" name="/" dev="proc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:proc_t tclass=filesystem permissive=1 [ 30.122569][ T304] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. [pid 308] --- SIGBUS {si_signo=SIGBUS, si_code=BUS_ADRERR, si_addr=0x200000000380} --- [ 30.147921][ T308] EXT4-fs error (device loop0): ext4_mb_generate_buddy:1102: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters [ 30.164537][ T304] ------------[ cut here ]------------ [ 30.170749][ T304] kernel BUG at fs/ext4/ext4_jbd2.c:53! [ 30.177019][ T304] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 30.183494][ T304] CPU: 0 PID: 304 Comm: syz-executor140 Not tainted 6.1.145-syzkaller-00006-g831a57b4a783 #0 [ 30.194661][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 30.205265][ T304] RIP: 0010:__ext4_journal_stop+0x192/0x1a0 [ 30.211383][ T304] Code: c3 e8 82 40 8e ff e9 f7 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 14 ff ff ff e8 88 a3 d2 ff e9 0a ff ff ff e8 5e 40 8e ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 [ 30.231252][ T304] RSP: 0018:ffffc90000ea7738 EFLAGS: 00010293 [ 30.237412][ T304] RAX: ffffffff81e1c9c2 RBX: 0000000000000000 RCX: ffff888102739440 [ 30.245396][ T304] RDX: 0000000000000000 RSI: 000000000000032c RDI: ffffffff864177a3 [ 30.253784][ T304] RBP: ffffc90000ea7770 R08: dffffc0000000000 R09: ffffed10228ab276 [ 30.261926][ T304] R10: ffffed10228ab276 R11: 1ffff110228ab275 R12: 1ffff11020af70ee [ 30.269916][ T304] R13: ffff8881057b8770 R14: 000000000000032c R15: ffffffff864177a3 [ 30.278033][ T304] FS: 00007f351d8e96c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 30.287424][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.294285][ T304] CR2: 00007f351d8c8d58 CR3: 00000001238d9000 CR4: 00000000003506b0 [ 30.302379][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.310380][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.318441][ T304] Call Trace: [ 30.321895][ T304] [ 30.324840][ T304] ext4_write_inline_data_end+0x7b8/0xa90 [ 30.330692][ T304] ? __cfi_ext4_write_inline_data_end+0x10/0x10 [ 30.336975][ T304] ? __cfi_copy_page_from_iter_atomic+0x10/0x10 [ 30.343300][ T304] ext4_da_write_end+0x1ce/0x8c0 [ 30.348353][ T304] generic_perform_write+0x3a2/0x6d0 [ 30.353827][ T304] ? __cfi_generic_perform_write+0x10/0x10 [ 30.359895][ T304] ext4_buffered_write_iter+0x36f/0x660 [ 30.365613][ T304] ext4_file_write_iter+0x18f/0x13d0 [ 30.371089][ T304] ? _raw_spin_unlock+0x4c/0x70 [ 30.376484][ T304] ? finish_task_switch+0x16b/0x7b0 [ 30.381857][ T304] ? __switch_to_asm+0x3a/0x60 [ 30.386622][ T304] ? avc_policy_seqno+0x1b/0x70 [ 30.391507][ T304] ? __cfi_ext4_file_write_iter+0x10/0x10 [ 30.397310][ T304] ? fsnotify_perm+0x67/0x5b0 [ 30.401978][ T304] ? security_file_permission+0x8a/0xb0 [ 30.407531][ T304] vfs_write+0x5db/0xca0 [ 30.411811][ T304] ? __kasan_check_write+0x14/0x20 [ 30.416940][ T304] ? __cfi_vfs_write+0x10/0x10 [ 30.421725][ T304] ? __cfi_mutex_lock+0x10/0x10 [ 30.426742][ T304] ? __fdget_pos+0x2cd/0x380 [ 30.431721][ T304] ? ksys_write+0x71/0x240 [ 30.436153][ T304] ksys_write+0x140/0x240 [ 30.440501][ T304] ? __cfi_ksys_write+0x10/0x10 [ 30.445370][ T304] ? fpregs_restore_userregs+0x128/0x260 [ 30.451186][ T304] __x64_sys_write+0x7b/0x90 [ 30.455815][ T304] x64_sys_call+0x27b/0x9a0 [ 30.460584][ T304] do_syscall_64+0x4c/0xa0 [ 30.465187][ T304] ? clear_bhb_loop+0x30/0x80 [ 30.470236][ T304] ? clear_bhb_loop+0x30/0x80 [ 30.475160][ T304] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 30.481243][ T304] RIP: 0033:0x7f351d930cb9 [ 30.485862][ T304] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 91 1a 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 b0 ff ff ff f7 d8 64 89 01 48 [ 30.505910][ T304] RSP: 002b:00007f351d8e9218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 30.514342][ T304] RAX: ffffffffffffffda RBX: 00007f351d9b86e8 RCX: 00007f351d930cb9 [ 30.522327][ T304] RDX: 0000000000000012 RSI: 0000200000000040 RDI: 0000000000000004 [ 30.530323][ T304] RBP: 00007f351d9b86e0 R08: 00007f351d8e8fb7 R09: 0000000000000000 [ 30.538441][ T304] R10: 0000000000000012 R11: 0000000000000246 R12: 00007f351d984de8 [ 30.546434][ T304] R13: 00007f351d984052 R14: 0000200000000000 R15: 0000200000000040 [ 30.554690][ T304] [ 30.557715][ T304] Modules linked in: [ 30.563524][ T304] ---[ end trace 0000000000000000 ]--- [ 30.569022][ T304] RIP: 0010:__ext4_journal_stop+0x192/0x1a0 [ 30.575228][ T304] Code: c3 e8 82 40 8e ff e9 f7 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 14 ff ff ff e8 88 a3 d2 ff e9 0a ff ff ff e8 5e 40 8e ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 [ 30.595422][ T304] RSP: 0018:ffffc90000ea7738 EFLAGS: 00010293 [ 30.601612][ T304] RAX: ffffffff81e1c9c2 RBX: 0000000000000000 RCX: ffff888102739440 [ 30.609604][ T304] RDX: 0000000000000000 RSI: 000000000000032c RDI: ffffffff864177a3 [ 30.617721][ T304] RBP: ffffc90000ea7770 R08: dffffc0000000000 R09: ffffed10228ab276 [ 30.625887][ T304] R10: ffffed10228ab276 R11: 1ffff110228ab275 R12: 1ffff11020af70ee [ 30.633906][ T304] R13: ffff8881057b8770 R14: 000000000000032c R15: ffffffff864177a3 [ 30.641921][ T304] FS: 00007f351d8e96c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 30.651043][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.657707][ T304] CR2: 00007f351d8c8d58 CR3: 00000001238d9000 CR4: 00000000003506b0 [ 30.666034][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.674245][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.682276][ T304] Kernel panic - not syncing: Fatal exception [ 30.688665][ T304] Kernel Offset: disabled [ 30.693017][ T304] Rebooting in 86400 seconds..