./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor407602956 <...> Warning: Permanently added '10.128.0.196' (ED25519) to the list of known hosts. execve("./syz-executor407602956", ["./syz-executor407602956"], 0x7ffddceea620 /* 10 vars */) = 0 brk(NULL) = 0x5555673c7000 brk(0x5555673c7d00) = 0x5555673c7d00 arch_prctl(ARCH_SET_FS, 0x5555673c7380) = 0 set_tid_address(0x5555673c7650) = 296 set_robust_list(0x5555673c7660, 24) = 0 rseq(0x5555673c7ca0, 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-executor407602956", 4096) = 27 getrandom("\x62\xf2\x56\xde\x9b\x33\x50\x14", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555673c7d00 brk(0x5555673e8d00) = 0x5555673e8d00 brk(0x5555673e9000) = 0x5555673e9000 mprotect(0x7f10d2ffe000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 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) = 0x7f10cab49000 [ 23.875275][ T30] audit: type=1400 audit(1729175319.938:66): avc: denied { execmem } for pid=296 comm="syz-executor407" 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(0x7f10cab49000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 24.048937][ T30] audit: type=1400 audit(1729175320.118:67): avc: denied { read write } for pid=296 comm="syz-executor407" name="loop0" dev="devtmpfs" ino=112 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.049543][ T296] loop0: detected capacity change from 0 to 40427 [ 24.073457][ T30] audit: type=1400 audit(1729175320.118:68): avc: denied { open } for pid=296 comm="syz-executor407" path="/dev/loop0" dev="devtmpfs" ino=112 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 24.103534][ T30] audit: type=1400 audit(1729175320.118:69): avc: denied { ioctl } for pid=296 comm="syz-executor407" path="/dev/loop0" dev="devtmpfs" ino=112 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 close(4) = 0 mkdir("./bus", 0777) = 0 [ 24.200650][ T30] audit: type=1400 audit(1729175320.268:70): avc: denied { mounton } for pid=296 comm="syz-executor407" path="/root/bus" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.208148][ T296] ================================================================================ [ 24.235062][ T296] UBSAN: shift-out-of-bounds in fs/f2fs/super.c:901:5 [ 24.241878][ T296] shift exponent 106 is too large for 32-bit type 'int' [ 24.248867][ T296] CPU: 1 PID: 296 Comm: syz-executor407 Not tainted 5.15.167-syzkaller-02003-g5e4635681cf1 #0 [ 24.258921][ T296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 24.268899][ T296] Call Trace: [ 24.272038][ T296] [ 24.274801][ T296] dump_stack_lvl+0x151/0x1c0 [ 24.279326][ T296] ? io_uring_drop_tctx_refs+0x190/0x190 [ 24.284875][ T296] ? slab_free_freelist_hook+0xbd/0x190 [ 24.290256][ T296] dump_stack+0x15/0x20 [ 24.294241][ T296] __ubsan_handle_shift_out_of_bounds+0x3bf/0x420 [ 24.300583][ T296] parse_options+0x460f/0x4620 [ 24.305180][ T296] ? do_syscall_64+0x3b/0xb0 [ 24.309615][ T296] ? entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 24.315513][ T296] ? default_options+0xa20/0xa20 [ 24.320284][ T296] ? memcpy+0x56/0x70 [ 24.324536][ T296] f2fs_fill_super+0x2e61/0x8170 [ 24.329315][ T296] ? kill_f2fs_super+0x3c0/0x3c0 [ 24.334085][ T296] ? vscnprintf+0x80/0x80 [ 24.338248][ T296] ? set_blocksize+0x1f0/0x380 [ 24.342850][ T296] ? sb_set_blocksize+0xa8/0xf0 [ 24.347540][ T296] mount_bdev+0x282/0x3b0 [ 24.351701][ T296] ? kill_f2fs_super+0x3c0/0x3c0 [ 24.356477][ T296] f2fs_mount+0x34/0x40 [ 24.360467][ T296] legacy_get_tree+0xf1/0x190 [ 24.364979][ T296] ? trace_raw_output_f2fs__rw_end+0x110/0x110 [ 24.371085][ T296] vfs_get_tree+0x88/0x290 [ 24.375309][ T296] do_new_mount+0x2ba/0xb30 [ 24.379652][ T296] ? do_move_mount_old+0x160/0x160 [ 24.384595][ T296] ? security_capable+0x87/0xb0 [ 24.389373][ T296] ? ns_capable+0x89/0xe0 [ 24.393625][ T296] path_mount+0x671/0x1070 [ 24.397884][ T296] __se_sys_mount+0x2c4/0x3b0 [ 24.402482][ T296] ? __x64_sys_mount+0xd0/0xd0 [ 24.407075][ T296] ? __kasan_check_write+0x14/0x20 [ 24.412023][ T296] __x64_sys_mount+0xbf/0xd0 [ 24.416465][ T296] x64_sys_call+0x49d/0x9a0 [ 24.420790][ T296] do_syscall_64+0x3b/0xb0 [ 24.425043][ T296] ? clear_bhb_loop+0x35/0x90 [ 24.429557][ T296] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 24.435284][ T296] RIP: 0033:0x7f10d2f87d7a [ 24.439536][ T296] 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 [ 24.458978][ T296] RSP: 002b:00007ffc726a48d8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 24.467223][ T296] RAX: ffffffffffffffda RBX: 00007ffc726a48f0 RCX: 00007f10d2f87d7a [ 24.475034][ T296] RDX: 0000000020000040 RSI: 0000000020000180 RDI: 00007ffc726a48f0 [ 24.483154][ T296] RBP: 0000000000000004 R08: 00007ffc726a4930 R09: 00000000000054ff [ 24.491099][ T296] R10: 0000000000000008 R11: 0000000000000286 R12: 0000000000000008 [ 24.498920][ T296] R13: 00007ffc726a4930 R14: 0000000000000003 R15: 00000000013bd7ef [ 24.507149][ T296] [ 24.510705][ T296] ================================================================================ [ 24.520085][ T296] F2FS-fs (loop0): Not support 1024, larger than 256 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 ioctl(3, LOOP_CLR_FD) = 0 close(3) = 0 exit_group(0) = ? +++ exited with 0 +++