------------[ 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: 1 UID: 0 PID: 6502 Comm: syz-executor Not tainted 6.15.0-syzkaller-ge0797d3b91de #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
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:233 [inline]
 __ubsan_handle_shift_out_of_bounds+0x27f/0x420 lib/ubsan.c:494
 befs_check_sb.cold+0x19/0x6f fs/befs/super.c:96
 befs_fill_super+0x512/0xc90 fs/befs/linuxvfs.c:841
 get_tree_bdev_flags+0x389/0x620 fs/super.c:1686
 vfs_get_tree+0x8b/0x340 fs/super.c:1809
 do_new_mount fs/namespace.c:3882 [inline]
 path_mount+0x14d4/0x1f70 fs/namespace.c:4209
 do_mount fs/namespace.c:4222 [inline]
 __do_sys_mount fs/namespace.c:4433 [inline]
 __se_sys_mount fs/namespace.c:4410 [inline]
 __x64_sys_mount+0x28d/0x310 fs/namespace.c:4410
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f382467e5ea
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:00007f382542def8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f382542df80 RCX: 00007f382467e5ea
RDX: 0000000020000100 RSI: 0000000020009e40 RDI: 00007f382542df40
RBP: 0000000020000100 R08: 00007f382542df80 R09: 0000000003008001
R10: 0000000003008001 R11: 0000000000000246 R12: 0000000020009e40
R13: 00007f382542df40 R14: 0000000000009e24 R15: 00000000200001c0
 </TASK>
---[ end trace ]---