EXT4-fs (loop2): Unrecognized mount option "uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu" or missing value
EXT4-fs (loop2): failed to parse options in superblock: uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
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UBSAN: shift-out-of-bounds in fs/ext4/super.c:2492:15
shift exponent 3551861919 is too large for 32-bit type 'int'
CPU: 0 PID: 385 Comm: syz.2.21 Not tainted 5.15.189-syzkaller-00091-gf32b52534f1d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 dump_stack+0x15/0x20 lib/dump_stack.c:113
 ubsan_epilogue+0xe/0x40 lib/ubsan.c:151
 __ubsan_handle_shift_out_of_bounds+0x37c/0x400 lib/ubsan.c:321
 parse_options+0x22db/0x2360 fs/ext4/super.c:2492
 ext4_fill_super+0x1d26/0x9030 fs/ext4/super.c:4166
 mount_bdev+0x2ae/0x3e0 fs/super.c:1400
 ext4_mount+0x34/0x40 fs/ext4/super.c:6621
 legacy_get_tree+0xed/0x190 fs/fs_context.c:611
 vfs_get_tree+0x89/0x260 fs/super.c:1530
 do_new_mount+0x25a/0xa20 fs/namespace.c:3014
 path_mount+0x675/0x1020 fs/namespace.c:3344
 do_mount fs/namespace.c:3357 [inline]
 __do_sys_mount fs/namespace.c:3565 [inline]
 __se_sys_mount+0x318/0x380 fs/namespace.c:3542
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3542
 x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2df91bd14a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2df8c2be68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2df8c2bef0 RCX: 00007f2df91bd14a
RDX: 0000200000000040 RSI: 0000200000000640 RDI: 00007f2df8c2beb0
RBP: 0000200000000040 R08: 00007f2df8c2bef0 R09: 0000000000a00000
R10: 0000000000a00000 R11: 0000000000000246 R12: 0000200000000640
R13: 00007f2df8c2beb0 R14: 000000000000053d R15: 000000000000002c
 </TASK>
================================================================================
EXT4-fs (loop2): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE
EXT4-fs (loop2): Encoding requested by superblock is unknown