./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3326400896 <...> Warning: Permanently added '10.128.0.251' (ED25519) to the list of known hosts. execve("./syz-executor3326400896", ["./syz-executor3326400896"], 0x7ffe8f988800 /* 10 vars */) = 0 brk(NULL) = 0x555557292000 brk(0x555557292d00) = 0x555557292d00 arch_prctl(ARCH_SET_FS, 0x555557292380) = 0 set_tid_address(0x555557292650) = 290 set_robust_list(0x555557292660, 24) = 0 rseq(0x555557292ca0, 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-executor3326400896", 4096) = 28 getrandom("\x85\x0b\x63\x11\x1a\xe8\x7d\xf6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557292d00 brk(0x5555572b3d00) = 0x5555572b3d00 brk(0x5555572b4000) = 0x5555572b4000 mprotect(0x7f31e4f3e000, 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, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f31dca89000 [ 26.326025][ T28] audit: type=1400 audit(1749655388.285:64): avc: denied { execmem } for pid=290 comm="syz-executor332" 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(0x7f31dca89000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file0", 0777) = 0 [ 26.426264][ T28] audit: type=1400 audit(1749655388.385:65): avc: denied { read write } for pid=290 comm="syz-executor332" 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 [ 26.427291][ T290] loop0: detected capacity change from 0 to 40427 [ 26.450563][ T28] audit: type=1400 audit(1749655388.385:66): avc: denied { open } for pid=290 comm="syz-executor332" 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 [ 26.461135][ T290] F2FS-fs (loop0): Small segment_count (20 < 1 * 24) [ 26.488594][ T28] audit: type=1400 audit(1749655388.385:67): avc: denied { ioctl } for pid=290 comm="syz-executor332" 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 [ 26.492015][ T290] F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock [ 26.514547][ T28] audit: type=1400 audit(1749655388.425:68): avc: denied { mounton } for pid=290 comm="syz-executor332" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 26.539014][ T290] F2FS-fs (loop0): heap/no_heap options were deprecated [ 26.553309][ T290] ================================================================================ [ 26.562631][ T290] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:919:5 [ 26.569409][ T290] shift exponent 112 is too large for 64-bit type 'unsigned long' [ 26.577264][ T290] CPU: 0 PID: 290 Comm: syz-executor332 Not tainted 6.1.138-syzkaller-00003-g47e5d7e91778 #0 [ 26.587424][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 26.597481][ T290] Call Trace: [ 26.600751][ T290] [ 26.603675][ T290] __dump_stack+0x21/0x24 [ 26.608020][ T290] dump_stack_lvl+0xee/0x150 [ 26.612619][ T290] ? __cfi_dump_stack_lvl+0x8/0x8 [ 26.617663][ T290] ? __kasan_slab_free+0x11/0x20 [ 26.622595][ T290] dump_stack+0x15/0x24 [ 26.626754][ T290] ubsan_epilogue+0xe/0x40 [ 26.631186][ T290] __ubsan_handle_shift_out_of_bounds+0x37c/0x400 [ 26.637599][ T290] ? match_int+0x13c/0x190 [ 26.642016][ T290] parse_options+0x4829/0x4830 [ 26.646786][ T290] ? do_new_mount+0x25a/0xa20 [ 26.651478][ T290] ? default_options+0xd90/0xd90 [ 26.656411][ T290] ? f2fs_fill_super+0x2245/0x6c70 [ 26.661521][ T290] ? memcpy+0x56/0x70 [ 26.665498][ T290] f2fs_fill_super+0x2281/0x6c70 [ 26.670439][ T290] ? __cfi_f2fs_fill_super+0x10/0x10 [ 26.675719][ T290] ? mutex_unlock+0x89/0x220 [ 26.680297][ T290] ? set_blocksize+0x1df/0x360 [ 26.685147][ T290] ? sb_set_blocksize+0xaa/0xf0 [ 26.689994][ T290] ? __cfi_f2fs_fill_super+0x10/0x10 [ 26.695274][ T290] mount_bdev+0x2bc/0x3f0 [ 26.699596][ T290] ? __cfi_f2fs_fill_super+0x10/0x10 [ 26.704874][ T290] f2fs_mount+0x34/0x40 [ 26.709023][ T290] legacy_get_tree+0xfe/0x1a0 [ 26.713718][ T290] ? __cfi_f2fs_mount+0x10/0x10 [ 26.718563][ T290] vfs_get_tree+0x9a/0x270 [ 26.722988][ T290] do_new_mount+0x25a/0xa20 [ 26.727672][ T290] path_mount+0x675/0x1010 [ 26.732084][ T290] ? user_path_at_empty+0x161/0x1c0 [ 26.737280][ T290] __se_sys_mount+0x318/0x380 [ 26.741953][ T290] ? __x64_sys_mount+0xd0/0xd0 [ 26.746720][ T290] ? fpregs_restore_userregs+0x128/0x260 [ 26.752345][ T290] __x64_sys_mount+0xbf/0xd0 [ 26.756934][ T290] x64_sys_call+0x65d/0x9a0 [ 26.761435][ T290] do_syscall_64+0x4c/0xa0 [ 26.765846][ T290] ? clear_bhb_loop+0x15/0x70 [ 26.770513][ T290] ? clear_bhb_loop+0x15/0x70 [ 26.775178][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 26.781068][ T290] RIP: 0033:0x7f31e4ec7cfa [ 26.785480][ T290] 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 [ 26.805074][ T290] RSP: 002b:00007ffd3e976518 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 26.813565][ T290] RAX: ffffffffffffffda RBX: 00007ffd3e976530 RCX: 00007f31e4ec7cfa mount("/dev/loop0", "./file0", "f2fs", MS_REC, "nobarrier,age_extent_cache,alloc_mode=default,noinline_data,noflush_merge,disable_roll_forward,acl,n"...) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [ 26.821528][ T290] RDX: 0000200000000280 RSI: 00002000000000c0 RDI: 00007ffd3e976530 [ 26.829488][ T290] RBP: 00002000000000c0 R08: 00007ffd3e976570 R09: 002c747079726365 [ 26.837478][ T290] R10: 0000000000004000 R11: 0000000000000286 R12: 0000200000000280 [ 26.845442][ T290] R13: 00007ffd3e976570 R14: 0000000000000003 R15: 0000000000004000 [ 26.853425][ T290] [ 26.856510][ T290] ================================================================================ [ 26.865811][ T290] F2FS-fs (loop0): Not support 281474976710656, larger than 256 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++