================================================================================
UBSAN: shift-out-of-bounds in fs/f2fs/super.c:942:5
shift exponent 127 is too large for 64-bit type 'unsigned long'
CPU: 1 PID: 494 Comm: syz.1.40 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 dump_stack+0x15/0x24 lib/dump_stack.c:113
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds+0x364/0x3f0 lib/ubsan.c:321
 parse_options+0x4a47/0x4a50 fs/f2fs/super.c:943
 f2fs_fill_super+0x2660/0x7380 fs/f2fs/super.c:4428
 mount_bdev+0x29b/0x3d0 fs/super.c:1448
 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4861
 legacy_get_tree+0xfe/0x1a0 fs/fs_context.c:632
 vfs_get_tree+0x9a/0x270 fs/super.c:1578
 do_new_mount+0x251/0xb40 fs/namespace.c:3081
 path_mount+0x640/0xfd0 fs/namespace.c:3411
 do_mount fs/namespace.c:3424 [inline]
 __do_sys_mount fs/namespace.c:3632 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3609
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3609
 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f164139e0ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f164232fe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f164232fee0 RCX: 00007f164139e0ca
RDX: 00002000000000c0 RSI: 00002000000105c0 RDI: 00007f164232fea0
RBP: 00002000000000c0 R08: 00007f164232fee0 R09: 0000000000000009
R10: 0000000000000009 R11: 0000000000000246 R12: 00002000000105c0
R13: 00007f164232fea0 R14: 0000000000010577 R15: 0000200000000000
 </TASK>
================================================================================
F2FS-fs (loop1): Not support -9223372036854775808, larger than 256