loop2: detected capacity change from 0 to 512
EXT4-fs (loop2): encrypted files will use data=ordered instead of data journaling mode
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UBSAN: shift-out-of-bounds in fs/ext4/super.c:4423:27
shift exponent 4053351384 is too large for 32-bit type 'int'
CPU: 1 PID: 440 Comm: syz.2.33 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 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
 ext4_fill_super+0x6e8a/0x9080 fs/ext4/super.c:4423
 mount_bdev+0x2ae/0x3e0 fs/super.c:1400
 ext4_mount+0x34/0x40 fs/ext4/super.c:6624
 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:3034
 path_mount+0x659/0xff0 fs/namespace.c:3364
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3562
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3562
 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: 0033:0x7fec019d014a
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:00007fec01832e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fec01832ee0 RCX: 00007fec019d014a
RDX: 0000200000000540 RSI: 00002000000001c0 RDI: 00007fec01832ea0
RBP: 0000200000000540 R08: 00007fec01832ee0 R09: 0000000000000088
R10: 0000000000000088 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007fec01832ea0 R14: 0000000000000438 R15: 000000000000002c
 </TASK>
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EXT4-fs (loop2): fragment/cluster size (0) != block size (1024)