------------[ cut here ]------------
UBSAN: shift-out-of-bounds in fs/befs/super.c:96:9
shift exponent 3229888891 is too large for 32-bit type 'int'
CPU: 0 UID: 0 PID: 5597 Comm: syz-executor.0 Not tainted 6.12.0-rc3-syzkaller-gc964ced77262 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_shift_out_of_bounds+0x2a5/0x480 lib/ubsan.c:468
 befs_check_sb.cold+0x19/0x6f fs/befs/super.c:96
 befs_fill_super+0x9e8/0x1140 fs/befs/linuxvfs.c:868
 mount_bdev+0x1e3/0x2d0 fs/super.c:1679
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1800
 do_new_mount fs/namespace.c:3507 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount fs/namespace.c:4032 [inline]
 __x64_sys_mount+0x294/0x320 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8d2287f4aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8d2352aef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8d2352af80 RCX: 00007f8d2287f4aa
RDX: 0000000020000100 RSI: 0000000020009e40 RDI: 00007f8d2352af40
RBP: 0000000020000100 R08: 00007f8d2352af80 R09: 0000000003008001
R10: 0000000003008001 R11: 0000000000000246 R12: 0000000020009e40
R13: 00007f8d2352af40 R14: 0000000000009e24 R15: 00000000200001c0
 </TASK>
---[ end trace ]---