./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2198543715

<...>
Warning: Permanently added '10.128.0.232' (ED25519) to the list of known hosts.
execve("./syz-executor2198543715", ["./syz-executor2198543715"], 0x7ffffc315b80 /* 10 vars */) = 0
brk(NULL)                               = 0x555556cb3000
brk(0x555556cb3d00)                     = 0x555556cb3d00
arch_prctl(ARCH_SET_FS, 0x555556cb3380) = 0
set_tid_address(0x555556cb3650)         = 5020
set_robust_list(0x555556cb3660, 24)     = 0
rseq(0x555556cb3ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor2198543715", 4096) = 28
getrandom("\x93\x18\x3b\x75\x61\x9a\x91\xba", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555556cb3d00
brk(0x555556cd4d00)                     = 0x555556cd4d00
brk(0x555556cd5000)                     = 0x555556cd5000
mprotect(0x7f5635dba000, 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
memfd_create("syzkaller", 0)            = 3
mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f562d900000
write(3, "\xb5\x84\x31\x7b\xb6\x84\x31\x7b\xb7\x84\x31\x7b\xb8\x84\x31\x7b\xb9\x84\x31\x7b\xba\x84\x31\x7b\xbb\x84\x31\x7b\xbc\x84\x31\x7b\x42\x46\x53\x31\xbe\x84\x31\x7b\x00\x00\x10\x00\xc0\x84\x31\x7b\xc1\x84\x31\x7b\xc2\x84\x31\x7b\xc3\x84\x31\x7b\xc4\x84\x31\x7b\xc5\x84\x31\x7b\xdd\x12\x10\x31\xc7\x84\x31\x7b\xc8\x84\x31\x7b\xc9\x84\x31\x7b\xca\x84\x31\x7b\xcb\x84\x31\x7b\xcc\x84\x31\x7b\xcd\x84\x31\x7b"..., 65536) = 65536
munmap(0x7f562d900000, 65536)           = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR)  = 4
ioctl(4, LOOP_SET_FD, 3)                = 0
close(3)                                = 0
mkdir("./file0", 0777)                  = 0
syzkaller login: [   45.316466][ T5020] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5020 'syz-executor219'
[   45.331418][ T5020] loop0: detected capacity change from 0 to 128
[   45.342085][ T5020] ================================================================================
[   45.351463][ T5020] UBSAN: shift-out-of-bounds in fs/befs/super.c:96:9
[   45.358185][ T5020] shift exponent 3229888891 is too large for 32-bit type 'int'
[   45.365724][ T5020] CPU: 0 PID: 5020 Comm: syz-executor219 Not tainted 6.5.0-rc6-syzkaller-00253-g9e6c269de404 #0
[   45.376114][ T5020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
[   45.386241][ T5020] Call Trace:
[   45.389507][ T5020]  <TASK>
[   45.392425][ T5020]  dump_stack_lvl+0x125/0x1b0
[   45.397225][ T5020]  __ubsan_handle_shift_out_of_bounds+0x27a/0x600
[   45.403644][ T5020]  befs_check_sb.cold+0x19/0x6f
[   45.408483][ T5020]  befs_fill_super+0x9e6/0x1140
[   45.413428][ T5020]  ? befs_symlink_read_folio+0x260/0x260
[   45.419055][ T5020]  ? snprintf+0xc8/0x100
[   45.423294][ T5020]  ? bit_wait_timeout+0x160/0x160
[   45.428314][ T5020]  ? set_blocksize+0x2bd/0x360
[   45.433071][ T5020]  ? befs_symlink_read_folio+0x260/0x260
[   45.438701][ T5020]  ? befs_symlink_read_folio+0x260/0x260
[   45.444327][ T5020]  mount_bdev+0x30d/0x3d0
[   45.448647][ T5020]  ? befs_bread_iaddr+0x430/0x430
[   45.453659][ T5020]  legacy_get_tree+0x109/0x220
[   45.458419][ T5020]  vfs_get_tree+0x88/0x350
[   45.462829][ T5020]  path_mount+0x1492/0x1ed0
[   45.467324][ T5020]  ? kmem_cache_free+0xf0/0x490
[   45.472164][ T5020]  ? finish_automount+0xa50/0xa50
[   45.477179][ T5020]  ? putname+0x101/0x140
[   45.481411][ T5020]  __x64_sys_mount+0x293/0x310
[   45.486167][ T5020]  ? copy_mnt_ns+0xb60/0xb60
[   45.490845][ T5020]  ? lockdep_hardirqs_on+0x7d/0x100
[   45.496041][ T5020]  ? _raw_spin_unlock_irq+0x2e/0x50
[   45.501234][ T5020]  ? ptrace_notify+0xf4/0x130
[   45.505900][ T5020]  do_syscall_64+0x38/0xb0
[   45.510304][ T5020]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   45.516185][ T5020] RIP: 0033:0x7f5635d3e8ba
[   45.520589][ T5020] 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
[   45.540273][ T5020] RSP: 002b:00007ffd321ef8c8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   45.548671][ T5020] RAX: ffffffffffffffda RBX: 00007ffd321ef8d0 RCX: 00007f5635d3e8ba
[   45.556644][ T5020] RDX: 0000000020000100 RSI: 0000000020009e40 RDI: 00007ffd321ef8d0
[   45.564601][ T5020] RBP: 0000000000000004 R08: 00007ffd321ef910 R09: 0000000000009e1f
[   45.572558][ T5020] R10: 0000000003008001 R11: 0000000000000282 R12: 00007ffd321ef910
[   45.580513][ T5020] R13: 0000000000000003 R14: 0000000000010000 R15: 0000000000000001
[   45.588480][ T5020]  </TASK>
[   45.591936][ T5020] ================================================================================
[   45.601260][ T5020] Kernel panic - not syncing: UBSAN: panic_on_warn set ...
[   45.608438][ T5020] CPU: 1 PID: 5020 Comm: syz-executor219 Not tainted 6.5.0-rc6-syzkaller-00253-g9e6c269de404 #0
[   45.618912][ T5020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
[   45.628950][ T5020] Call Trace:
[   45.632208][ T5020]  <TASK>
[   45.635114][ T5020]  dump_stack_lvl+0xd9/0x1b0
[   45.639684][ T5020]  panic+0x6a4/0x750
[   45.643560][ T5020]  ? panic_smp_self_stop+0xa0/0xa0
[   45.648649][ T5020]  ? syslog_print_all+0x3f0/0x3f0
[   45.653662][ T5020]  check_panic_on_warn+0xab/0xb0
[   45.658590][ T5020]  __ubsan_handle_shift_out_of_bounds+0x2a2/0x600
[   45.664991][ T5020]  befs_check_sb.cold+0x19/0x6f
[   45.669818][ T5020]  befs_fill_super+0x9e6/0x1140
[   45.674649][ T5020]  ? befs_symlink_read_folio+0x260/0x260
[   45.680264][ T5020]  ? snprintf+0xc8/0x100
[   45.684487][ T5020]  ? bit_wait_timeout+0x160/0x160
[   45.689496][ T5020]  ? set_blocksize+0x2bd/0x360
[   45.694238][ T5020]  ? befs_symlink_read_folio+0x260/0x260
[   45.699848][ T5020]  ? befs_symlink_read_folio+0x260/0x260
[   45.705459][ T5020]  mount_bdev+0x30d/0x3d0
[   45.709770][ T5020]  ? befs_bread_iaddr+0x430/0x430
[   45.714781][ T5020]  legacy_get_tree+0x109/0x220
[   45.719539][ T5020]  vfs_get_tree+0x88/0x350
[   45.723943][ T5020]  path_mount+0x1492/0x1ed0
[   45.728438][ T5020]  ? kmem_cache_free+0xf0/0x490
[   45.733282][ T5020]  ? finish_automount+0xa50/0xa50
[   45.738299][ T5020]  ? putname+0x101/0x140
[   45.742528][ T5020]  __x64_sys_mount+0x293/0x310
[   45.747282][ T5020]  ? copy_mnt_ns+0xb60/0xb60
[   45.751859][ T5020]  ? lockdep_hardirqs_on+0x7d/0x100
[   45.757048][ T5020]  ? _raw_spin_unlock_irq+0x2e/0x50
[   45.762328][ T5020]  ? ptrace_notify+0xf4/0x130
[   45.766999][ T5020]  do_syscall_64+0x38/0xb0
[   45.771402][ T5020]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   45.777306][ T5020] RIP: 0033:0x7f5635d3e8ba
[   45.781707][ T5020] 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
[   45.801316][ T5020] RSP: 002b:00007ffd321ef8c8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
[   45.809719][ T5020] RAX: ffffffffffffffda RBX: 00007ffd321ef8d0 RCX: 00007f5635d3e8ba
[   45.817677][ T5020] RDX: 0000000020000100 RSI: 0000000020009e40 RDI: 00007ffd321ef8d0
[   45.825631][ T5020] RBP: 0000000000000004 R08: 00007ffd321ef910 R09: 0000000000009e1f
[   45.833588][ T5020] R10: 0000000003008001 R11: 0000000000000282 R12: 00007ffd321ef910
[   45.841547][ T5020] R13: 0000000000000003 R14: 0000000000010000 R15: 0000000000000001
[   45.849512][ T5020]  </TASK>
[   45.853443][ T5020] Kernel Offset: disabled
[   45.857819][ T5020] Rebooting in 86400 seconds..