./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2520334169 <...> Warning: Permanently added '10.128.0.187' (ED25519) to the list of known hosts. execve("./syz-executor2520334169", ["./syz-executor2520334169"], 0x7ffeecdd2b60 /* 10 vars */) = 0 brk(NULL) = 0x555574d2f000 brk(0x555574d2fd00) = 0x555574d2fd00 arch_prctl(ARCH_SET_FS, 0x555574d2f380) = 0 set_tid_address(0x555574d2f650) = 290 set_robust_list(0x555574d2f660, 24) = 0 rseq(0x555574d2fca0, 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-executor2520334169", 4096) = 28 getrandom("\xb2\xbf\x36\xd2\x75\xe6\xe4\x64", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555574d2fd00 brk(0x555574d50d00) = 0x555574d50d00 brk(0x555574d51000) = 0x555574d51000 mprotect(0x7f5705cbe000, 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) = 0x7f56fd809000 [ 22.095632][ T28] audit: type=1400 audit(1747023769.214:64): avc: denied { execmem } for pid=290 comm="syz-executor252" 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(0x7f56fd809000, 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 [ 22.173535][ T28] audit: type=1400 audit(1747023769.294:65): avc: denied { read write } for pid=290 comm="syz-executor252" 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 [ 22.174205][ T290] loop0: detected capacity change from 0 to 40427 [ 22.197956][ T28] audit: type=1400 audit(1747023769.294:66): avc: denied { open } for pid=290 comm="syz-executor252" 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 [ 22.211915][ T290] F2FS-fs (loop0): Fix alignment : internally, start(4096) end(16896) block(12288) [ 22.231241][ T28] audit: type=1400 audit(1747023769.294:67): avc: denied { ioctl } for pid=290 comm="syz-executor252" 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 [ 22.238043][ T290] ================================================================================ [ 22.263484][ T28] audit: type=1400 audit(1747023769.334:68): avc: denied { mounton } for pid=290 comm="syz-executor252" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 22.273148][ T290] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:919:5 [ 22.302280][ T290] shift exponent 92 is too large for 64-bit type 'unsigned long' [ 22.310015][ T290] CPU: 1 PID: 290 Comm: syz-executor252 Not tainted 6.1.134-syzkaller-00012-g646380b087a5 #0 [ 22.320167][ T290] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 22.330200][ T290] Call Trace: [ 22.333455][ T290] [ 22.336363][ T290] __dump_stack+0x21/0x24 [ 22.340682][ T290] dump_stack_lvl+0xee/0x150 [ 22.345248][ T290] ? __cfi_dump_stack_lvl+0x8/0x8 [ 22.350249][ T290] ? __kasan_slab_free+0x11/0x20 [ 22.355168][ T290] dump_stack+0x15/0x24 [ 22.359296][ T290] ubsan_epilogue+0xe/0x40 [ 22.363697][ T290] __ubsan_handle_shift_out_of_bounds+0x37c/0x400 [ 22.370095][ T290] ? match_int+0x13c/0x190 [ 22.374484][ T290] parse_options+0x4829/0x4830 [ 22.379218][ T290] ? do_new_mount+0x25a/0xa20 [ 22.383867][ T290] ? default_options+0xd90/0xd90 [ 22.388782][ T290] ? f2fs_fill_super+0x2245/0x6c70 [ 22.393867][ T290] ? memcpy+0x56/0x70 [ 22.397827][ T290] f2fs_fill_super+0x2281/0x6c70 [ 22.402768][ T290] ? __cfi_f2fs_fill_super+0x10/0x10 [ 22.408041][ T290] ? mutex_unlock+0x89/0x220 [ 22.412645][ T290] ? set_blocksize+0x1df/0x360 [ 22.417393][ T290] ? sb_set_blocksize+0xaa/0xf0 [ 22.422236][ T290] ? __cfi_f2fs_fill_super+0x10/0x10 [ 22.427500][ T290] mount_bdev+0x2bc/0x3f0 [ 22.431808][ T290] ? __cfi_f2fs_fill_super+0x10/0x10 [ 22.437068][ T290] f2fs_mount+0x34/0x40 [ 22.441214][ T290] legacy_get_tree+0xfe/0x1a0 [ 22.445866][ T290] ? __cfi_f2fs_mount+0x10/0x10 [ 22.450687][ T290] vfs_get_tree+0x9a/0x270 [ 22.455075][ T290] do_new_mount+0x25a/0xa20 [ 22.459552][ T290] path_mount+0x675/0x1010 [ 22.463947][ T290] ? user_path_at_empty+0x161/0x1c0 [ 22.469139][ T290] __se_sys_mount+0x318/0x380 [ 22.473793][ T290] ? __x64_sys_mount+0xd0/0xd0 [ 22.478536][ T290] ? fpregs_restore_userregs+0x128/0x260 [ 22.484145][ T290] __x64_sys_mount+0xbf/0xd0 [ 22.488710][ T290] x64_sys_call+0x65d/0x9a0 [ 22.493186][ T290] do_syscall_64+0x4c/0xa0 [ 22.497583][ T290] ? clear_bhb_loop+0x15/0x70 [ 22.502230][ T290] ? clear_bhb_loop+0x15/0x70 [ 22.506880][ T290] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 22.512748][ T290] RIP: 0033:0x7f5705c47cfa [ 22.517151][ 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 [ 22.536820][ T290] RSP: 002b:00007ffe58991ab8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 22.545227][ T290] RAX: ffffffffffffffda RBX: 00007ffe58991ad0 RCX: 00007f5705c47cfa [ 22.553174][ T290] RDX: 0000200000000140 RSI: 00002000000000c0 RDI: 00007ffe58991ad0 [ 22.561119][ T290] RBP: 00002000000000c0 R08: 00007ffe58991b10 R09: 00000000000054ff 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 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 22.569070][ T290] R10: 0000000000000003 R11: 0000000000000286 R12: