./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1545909334 <...> Warning: Permanently added '10.128.1.121' (ED25519) to the list of known hosts. execve("./syz-executor1545909334", ["./syz-executor1545909334"], 0x7ffe5608e370 /* 10 vars */) = 0 brk(NULL) = 0x55556cfc3000 brk(0x55556cfc3d00) = 0x55556cfc3d00 arch_prctl(ARCH_SET_FS, 0x55556cfc3380) = 0 set_tid_address(0x55556cfc3650) = 288 set_robust_list(0x55556cfc3660, 24) = 0 rseq(0x55556cfc3ca0, 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-executor1545909334", 4096) = 28 getrandom("\xa7\xbd\xc6\x06\x57\x77\x23\x53", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55556cfc3d00 brk(0x55556cfe4d00) = 0x55556cfe4d00 brk(0x55556cfe5000) = 0x55556cfe5000 mprotect(0x7fef99437000, 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) = 0x7fef90f82000 [ 23.399597][ T30] audit: type=1400 audit(1754797496.178:64): avc: denied { execmem } for pid=288 comm="syz-executor154" 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(0x7fef90f82000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 23.510146][ T30] audit: type=1400 audit(1754797496.288:65): avc: denied { read write } for pid=288 comm="syz-executor154" 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 [ 23.511424][ T288] loop0: detected capacity change from 0 to 40427 close(4) = 0 mkdir("./file0", 0777) = 0 [ 23.534649][ T30] audit: type=1400 audit(1754797496.288:66): avc: denied { open } for pid=288 comm="syz-executor154" 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 [ 23.565307][ T30] audit: type=1400 audit(1754797496.288:67): avc: denied { ioctl } for pid=288 comm="syz-executor154" 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 [ 23.616277][ T30] audit: type=1400 audit(1754797496.398:68): avc: denied { mounton } for pid=288 comm="syz-executor154" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 23.616999][ T288] ================================================================================ [ 23.648417][ T288] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:911:5 [ 23.655382][ T288] shift exponent 168 is too large for 32-bit type 'int' [ 23.662347][ T288] CPU: 1 PID: 288 Comm: syz-executor154 Not tainted 5.15.189-syzkaller-android13-5.15.189_r00 #0 [ 23.672855][ T288] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 [ 23.682917][ T288] Call Trace: [ 23.686214][ T288] [ 23.689141][ T288] __dump_stack+0x21/0x30 [ 23.693482][ T288] dump_stack_lvl+0xee/0x150 [ 23.698081][ T288] ? show_regs_print_info+0x20/0x20 [ 23.703287][ T288] ? slab_free_freelist_hook+0xc2/0x190 [ 23.708912][ T288] dump_stack+0x15/0x20 [ 23.713179][ T288] ubsan_epilogue+0xe/0x40 [ 23.717589][ T288] __ubsan_handle_shift_out_of_bounds+0x37c/0x400 [ 23.724001][ T288] ? match_int+0x13c/0x190 [ 23.728420][ T288] parse_options+0x442f/0x4460 [ 23.733178][ T288] ? default_options+0xb10/0xb10 [ 23.738111][ T288] ? __kmalloc_track_caller+0x13c/0x2c0 [ 23.743651][ T288] ? memcpy+0x56/0x70 [ 23.747625][ T288] f2fs_fill_super+0x1f9d/0x6d10 [ 23.752583][ T288] ? kill_f2fs_super+0x390/0x390 [ 23.757519][ T288] ? vscnprintf+0x80/0x80 [ 23.761834][ T288] ? mutex_unlock+0x89/0x220 [ 23.766437][ T288] ? set_blocksize+0x1fc/0x380 [ 23.771191][ T288] ? sb_set_blocksize+0xaa/0xf0 [ 23.776031][ T288] ? kill_f2fs_super+0x390/0x390 [ 23.780957][ T288] mount_bdev+0x2ae/0x3e0 [ 23.785273][ T288] ? kill_f2fs_super+0x390/0x390 [ 23.790203][ T288] f2fs_mount+0x34/0x40 [ 23.794365][ T288] legacy_get_tree+0xed/0x190 [ 23.799037][ T288] ? trace_raw_output_f2fs__rw_end+0x110/0x110 [ 23.805183][ T288] vfs_get_tree+0x89/0x260 [ 23.809597][ T288] do_new_mount+0x25a/0xa20 [ 23.814094][ T288] path_mount+0x675/0x1020 [ 23.818500][ T288] ? user_path_at_empty+0x161/0x1c0 [ 23.823705][ T288] __se_sys_mount+0x318/0x380 [ 23.828370][ T288] ? __x64_sys_mount+0xd0/0xd0 [ 23.833161][ T288] ? __kasan_check_write+0x14/0x20 [ 23.838267][ T288] __x64_sys_mount+0xbf/0xd0 [ 23.842936][ T288] x64_sys_call+0x6bf/0x9a0 [ 23.847430][ T288] do_syscall_64+0x4c/0xa0 [ 23.851839][ T288] ? clear_bhb_loop+0x50/0xa0 [ 23.856508][ T288] ? clear_bhb_loop+0x50/0xa0 [ 23.861262][ T288] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 23.867151][ T288] RIP: 0033:0x7fef993c0d7a [ 23.871568][ 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 [ 23.891162][ T288] RSP: 002b:00007ffed054b018 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 23.899572][ T288] RAX: ffffffffffffffda RBX: 00007ffed054b030 RCX: 00007fef993c0d7a [ 23.907622][ T288] RDX: 0000200000000140 RSI: 0000200000000180 RDI: 00007ffed054b030 [ 23.915600][ T288] RBP: 0000200000000180 R08: 00007ffed054b070 R09: 002c706165685f6f [ 23.923589][ T288] R10: 0000000001000000 R11: 0000000000000286 R12: 0000200000000140 [ 23.931692][ T288] R13: 00007ffed054b070 R14: 0000000000000003 R15: 0000000001000000 [ 23.939759][ T288] [ 23.943154][ T288] ================================================================================ [ 23.952761][ T288] F2FS-fs (loop0): Not support 256, larger than 256 mount("/dev/loop0", "./file0", "f2fs", MS_STRICTATIME, "whint_mode=fs-based,background_gc=sync,jqfmt=vfsv0,compress_cache,inline_xattr,gc_merge,fsync_mode=p"...) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++