loop2: detected capacity change from 0 to 4096
EXT4-fs (loop2): Test dummy encryption mode enabled
EXT4-fs (loop2): mounted filesystem without journal. Opts: test_dummy_encryption=v1,dioread_nolock,,errors=continue. Quota mode: writeback.
================================================================================
UBSAN: shift-out-of-bounds in fs/ext4/super.c:2491:15
shift exponent 132 is too large for 32-bit type 'int'
CPU: 0 PID: 374 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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+0x364/0x3f0 lib/ubsan.c:321
 parse_options+0x23f3/0x2470 fs/ext4/super.c:2491
 ext4_remount+0x618/0x2530 fs/ext4/super.c:5832
 legacy_reconfigure+0xfa/0x110 fs/fs_context.c:634
 reconfigure_super+0x225/0x8a0 fs/super.c:938
 do_remount fs/namespace.c:2698 [inline]
 path_mount+0xc7b/0xff0 fs/namespace.c:3359
 do_mount fs/namespace.c:3380 [inline]
 __do_sys_mount fs/namespace.c:3588 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3565
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565
 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: 0033:0x7f38d5bd4e59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ffe11b4a158 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f38d5e4dfa0 RCX: 00007f38d5bd4e59
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007f38d5c6ae6f R08: 0000200000000000 R09: 0000000000000000
R10: 0000000002390024 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f38d5e4dfac R14: 00007f38d5e4dfa0 R15: 00007f38d5e4dfa0
 </TASK>
================================================================================
EXT4-fs (loop2): bad geometry: bigalloc file system with non-zero first_data_block