================================================================================
UBSAN: shift-out-of-bounds in fs/ext4/super.c:2493:15
shift exponent 1987084706 is too large for 32-bit type 'int'
CPU: 1 PID: 6620 Comm: syz.8.1777 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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+0x37c/0x400 lib/ubsan.c:321
 parse_options+0x23fb/0x2480 fs/ext4/super.c:2493
 ext4_remount+0x5ca/0x26d0 fs/ext4/super.c:5830
 legacy_reconfigure+0xfa/0x110 fs/fs_context.c:634
 reconfigure_super+0x21a/0x890 fs/super.c:938
 do_remount fs/namespace.c:2697 [inline]
 path_mount+0xd24/0xff0 fs/namespace.c:3356
 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: 0033:0x7fe97de2ba8a
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:00007fe97c884e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe97c884ee0 RCX: 00007fe97de2ba8a
RDX: 0000200000000000 RSI: 00002000000000c0 RDI: 0000000000000000
RBP: 0000200000000000 R08: 00007fe97c884ee0 R09: 0000000000010820
R10: 0000000000010820 R11: 0000000000000246 R12: 00002000000000c0
R13: 00007fe97c884ea0 R14: 0000000000000000 R15: 00002000000009c0
 </TASK>
================================================================================
EXT4-fs (loop8): re-mounted. Opts: . Quota mode: writeback.
EXT4-fs (loop8): shut down requested (0)