./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3147694080 <...> Warning: Permanently added '10.128.0.225' (ED25519) to the list of known hosts. execve("./syz-executor3147694080", ["./syz-executor3147694080"], 0x7ffc044024b0 /* 10 vars */) = 0 brk(NULL) = 0x55558adae000 brk(0x55558adaed00) = 0x55558adaed00 arch_prctl(ARCH_SET_FS, 0x55558adae380) = 0 set_tid_address(0x55558adae650) = 280 set_robust_list(0x55558adae660, 24) = 0 rseq(0x55558adaeca0, 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-executor3147694080", 4096) = 28 getrandom("\x03\x16\x98\x17\x80\x93\xf4\x18", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55558adaed00 brk(0x55558adcfd00) = 0x55558adcfd00 brk(0x55558add0000) = 0x55558add0000 mprotect(0x7f3914dec000, 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) = 0x7f390c937000 [ 23.960991][ T28] audit: type=1400 audit(1746471046.999:80): avc: denied { execmem } for pid=280 comm="syz-executor314" 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(0x7f390c937000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./bus", 0777) = 0 [ 24.080679][ T28] audit: type=1400 audit(1746471047.119:81): avc: denied { read write } for pid=280 comm="syz-executor314" name="loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.081587][ T280] loop0: detected capacity change from 0 to 40427 [ 24.105068][ T28] audit: type=1400 audit(1746471047.119:82): avc: denied { open } for pid=280 comm="syz-executor314" path="/dev/loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.114830][ T280] ================================================================================ [ 24.141727][ T28] audit: type=1400 audit(1746471047.119:83): avc: denied { ioctl } for pid=280 comm="syz-executor314" path="/dev/loop0" dev="devtmpfs" ino=118 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.150677][ T280] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:919:5 [ 24.170766][ T28] audit: type=1400 audit(1746471047.159:84): avc: denied { mounton } for pid=280 comm="syz-executor314" path="/root/bus" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.178259][ T280] shift exponent 106 is too large for 64-bit type 'unsigned long' [ 24.207486][ T280] CPU: 0 PID: 280 Comm: syz-executor314 Not tainted 6.1.134-syzkaller-00033-g0c1a07d9c284 #0 [ 24.217682][ T280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 24.227741][ T280] Call Trace: [ 24.231014][ T280] [ 24.233938][ T280] __dump_stack+0x21/0x24 [ 24.238285][ T280] dump_stack_lvl+0xee/0x150 [ 24.242915][ T280] ? __cfi_dump_stack_lvl+0x8/0x8 [ 24.247934][ T280] ? __kasan_slab_free+0x11/0x20 [ 24.252864][ T280] dump_stack+0x15/0x24 [ 24.257015][ T280] ubsan_epilogue+0xe/0x40 [ 24.261438][ T280] __ubsan_handle_shift_out_of_bounds+0x37c/0x400 [ 24.267872][ T280] ? match_int+0x13c/0x190 [ 24.272296][ T280] parse_options+0x4829/0x4830 [ 24.277078][ T280] ? do_new_mount+0x25a/0xa20 [ 24.281775][ T280] ? default_options+0xd90/0xd90 [ 24.286718][ T280] ? f2fs_fill_super+0x2245/0x6c70 [ 24.291828][ T280] ? memcpy+0x56/0x70 [ 24.295812][ T280] f2fs_fill_super+0x2281/0x6c70 [ 24.300756][ T280] ? __cfi_f2fs_fill_super+0x10/0x10 [ 24.306036][ T280] ? mutex_unlock+0x89/0x220 [ 24.310640][ T280] ? set_blocksize+0x1df/0x360 [ 24.315402][ T280] ? sb_set_blocksize+0xaa/0xf0 [ 24.320250][ T280] ? __cfi_f2fs_fill_super+0x10/0x10 [ 24.325532][ T280] mount_bdev+0x2bc/0x3f0 [ 24.329858][ T280] ? __cfi_f2fs_fill_super+0x10/0x10 [ 24.335144][ T280] f2fs_mount+0x34/0x40 [ 24.339309][ T280] legacy_get_tree+0xfe/0x1a0 [ 24.343980][ T280] ? __cfi_f2fs_mount+0x10/0x10 [ 24.348824][ T280] vfs_get_tree+0x9a/0x270 [ 24.353247][ T280] do_new_mount+0x25a/0xa20 [ 24.357747][ T280] path_mount+0x675/0x1010 [ 24.362162][ T280] ? user_path_at_empty+0x161/0x1c0 [ 24.367352][ T280] __se_sys_mount+0x318/0x380 [ 24.372039][ T280] ? __x64_sys_mount+0xd0/0xd0 [ 24.376800][ T280] ? fpregs_restore_userregs+0x128/0x260 [ 24.382485][ T280] __x64_sys_mount+0xbf/0xd0 [ 24.387073][ T280] x64_sys_call+0x65d/0x9a0 [ 24.391575][ T280] do_syscall_64+0x4c/0xa0 [ 24.395989][ T280] ? clear_bhb_loop+0x15/0x70 [ 24.400658][ T280] ? clear_bhb_loop+0x15/0x70 [ 24.405333][ T280] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 24.411225][ T280] RIP: 0033:0x7f3914d75d3a [ 24.415646][ T280] 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 [ 24.435253][ T280] RSP: 002b:00007fff8895e5b8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 24.443669][ T280] RAX: ffffffffffffffda RBX: 00007fff8895e5d0 RCX: 00007f3914d75d3a [ 24.451637][ T280] RDX: 0000200000000040 RSI: 0000200000000180 RDI: 00007fff8895e5d0 [ 24.459608][ T280] RBP: 0000200000000180 R08: 00007fff8895e610 R09: 00000000000054ff [ 24.467581][ T280] R10: 0000000000000008 R11: 0000000000000286 R12: 0000200000000040 mount("/dev/loop0", "./bus", "f2fs", MS_NOEXEC, "nodiscard,nocheckpoint_merge,alloc_mode=default,active_logs=6,active_logs=6,io_bits=0000000000000000"...) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 24.475576][ T280] R13: 00007fff8895e610 R14: 0000000000000003 R15: 0000000000000008 [ 24.483544][ T280] [ 24.486702][ T280] ================================================================================ [ 24.496084][ T280] F2FS-fs (loop0): Not support 4398046511104, larger than 256 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++