./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor860140858 <...> Warning: Permanently added '10.128.0.146' (ED25519) to the list of known hosts. execve("./syz-executor860140858", ["./syz-executor860140858"], 0x7ffddebd0fa0 /* 10 vars */) = 0 brk(NULL) = 0x55557fdf0000 brk(0x55557fdf0d00) = 0x55557fdf0d00 arch_prctl(ARCH_SET_FS, 0x55557fdf0380) = 0 set_tid_address(0x55557fdf0650) = 288 set_robust_list(0x55557fdf0660, 24) = 0 rseq(0x55557fdf0ca0, 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-executor860140858", 4096) = 27 getrandom("\xa1\xd8\x6a\xb2\x55\x9a\xca\xf4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557fdf0d00 brk(0x55557fe11d00) = 0x55557fe11d00 brk(0x55557fe12000) = 0x55557fe12000 mprotect(0x7f8e7db15000, 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 write(1, "executing program\n", 18executing program ) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8e75660000 [ 29.731082][ T30] audit: type=1400 audit(1747670967.312:64): avc: denied { execmem } for pid=288 comm="syz-executor860" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 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"..., 20699119) = 20699119 munmap(0x7f8e75660000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 29.858948][ T30] audit: type=1400 audit(1747670967.442:65): avc: denied { read write } for pid=288 comm="syz-executor860" name="loop0" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 29.861345][ T288] loop0: detected capacity change from 0 to 40427 close(4) = 0 mkdir("./file0", 0777) = 0 [ 29.898456][ T30] audit: type=1400 audit(1747670967.442:66): avc: denied { open } for pid=288 comm="syz-executor860" path="/dev/loop0" dev="devtmpfs" ino=116 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 29.964161][ T30] audit: type=1400 audit(1747670967.442:67): avc: denied { ioctl } for pid=288 comm="syz-executor860" path="/dev/loop0" dev="devtmpfs" ino=116 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 30.023436][ T30] audit: type=1400 audit(1747670967.612:68): avc: denied { mounton } for pid=288 comm="syz-executor860" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 30.042793][ T288] F2FS-fs (loop0): Fix alignment : internally, start(4096) end(16896) block(12288) [ 30.069513][ T288] ================================================================================ [ 30.085147][ T288] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:911:5 [ 30.099370][ T288] shift exponent 92 is too large for 32-bit type 'int' [ 30.109739][ T288] CPU: 1 PID: 288 Comm: syz-executor860 Not tainted 5.15.182-syzkaller-00462-g57725b368731 #0 [ 30.123615][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 30.137999][ T288] Call Trace: [ 30.143714][ T288] [ 30.151382][ T288] __dump_stack+0x21/0x30 [ 30.159796][ T288] dump_stack_lvl+0xee/0x150 [ 30.168881][ T288] ? show_regs_print_info+0x20/0x20 [ 30.175146][ T288] ? slab_free_freelist_hook+0xc2/0x190 [ 30.186482][ T288] dump_stack+0x15/0x20 [ 30.197658][ T288] ubsan_epilogue+0xe/0x40 [ 30.206349][ T288] __ubsan_handle_shift_out_of_bounds+0x37c/0x400 [ 30.214127][ T288] ? match_int+0x13c/0x190 [ 30.226733][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 30.234020][ T288] parse_options+0x442f/0x4460 [ 30.243357][ T288] ? default_options+0xb10/0xb10 [ 30.248575][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 30.255022][ T288] ? memcpy+0x56/0x70 [ 30.263076][ T288] f2fs_fill_super+0x1f9d/0x6d10 [ 30.274084][ T288] ? kill_f2fs_super+0x390/0x390 [ 30.283150][ T288] ? vscnprintf+0x80/0x80 [ 30.289052][ T288] ? mutex_unlock+0x89/0x220 [ 30.294453][ T288] ? set_blocksize+0x1fc/0x380 [ 30.300143][ T288] ? sb_set_blocksize+0xaa/0xf0 [ 30.306653][ T288] ? kill_f2fs_super+0x390/0x390 [ 30.311927][ T288] mount_bdev+0x2ae/0x3e0 [ 30.318003][ T288] ? kill_f2fs_super+0x390/0x390 [ 30.325719][ T288] f2fs_mount+0x34/0x40 [ 30.333214][ T288] legacy_get_tree+0xed/0x190 [ 30.339472][ T288] ? trace_raw_output_f2fs__rw_end+0x110/0x110 [ 30.347956][ T288] vfs_get_tree+0x89/0x260 [ 30.353113][ T288] do_new_mount+0x25a/0xa20 [ 30.358906][ T288] path_mount+0x675/0x1020 [ 30.364333][ T288] ? user_path_at_empty+0x161/0x1c0 [ 30.370952][ T288] __se_sys_mount+0x318/0x380 [ 30.376153][ T288] ? __x64_sys_mount+0xd0/0xd0 [ 30.383421][ T288] ? __kasan_check_write+0x14/0x20 [ 30.389073][ T288] __x64_sys_mount+0xbf/0xd0 [ 30.393997][ T288] x64_sys_call+0x6bf/0x9a0 [ 30.399737][ T288] do_syscall_64+0x4c/0xa0 [ 30.406972][ T288] ? clear_bhb_loop+0x35/0x90 [ 30.412586][ T288] ? clear_bhb_loop+0x35/0x90 [ 30.418684][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 30.425599][ T288] RIP: 0033:0x7f8e7da9ecfa [ 30.430498][ T288] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 30.452456][ T288] RSP: 002b:00007ffc0441dd18 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 30.461978][ T288] RAX: ffffffffffffffda RBX: 00007ffc0441dd30 RCX: 00007f8e7da9ecfa [ 30.471002][ T288] RDX: 0000200000000140 RSI: 00002000000000c0 RDI: 00007ffc0441dd30 [ 30.480561][ T288] RBP: 00002000000000c0 R08: 00007ffc0441dd70 R09: 00000000000054ff [ 30.492022][ T288] R10: 0000000000000003 R11: 0000000000000286 R12: 0000200000000140 [ 30.505462][ T288] R13: 0000000000000004 R14: 0000000000000003 R15: 00007ffc0441dd70 mount("/dev/loop0", "./file0", "f2fs", MS_RDONLY|MS_NOSUID, "io_bits=00000000000000000134,background_gc=sync,alloc_mode=default,active_logs=6,noflush_merge,disab"...) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 30.525687][ T288] [ 30.530575][ T288] ================================================================================ [ 30.541879][ T288] F2FS-fs (loop0): Not support 268435456, larger than 256 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++