loop1: detected capacity change from 0 to 131072 ================================================================================ UBSAN: shift-out-of-bounds in fs/f2fs/super.c:942:5 shift exponent 161 is too large for 64-bit type 'unsigned long' CPU: 1 PID: 1580 Comm: syz.1.340 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: __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+0x37c/0x400 lib/ubsan.c:321 parse_options+0x4aa0/0x4ab0 fs/f2fs/super.c:942 f2fs_fill_super+0x2318/0x6e20 fs/f2fs/super.c:4399 mount_bdev+0x2bc/0x3f0 fs/super.c:1448 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4832 legacy_get_tree+0xfe/0x1a0 fs/fs_context.c:632 vfs_get_tree+0x9a/0x270 fs/super.c:1578 do_new_mount+0x251/0xb30 fs/namespace.c:3081 path_mount+0x659/0xfc0 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: 0033:0x7fd288f9da0a 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:00007fd289f1ae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd289f1aee0 RCX: 00007fd288f9da0a RDX: 00002000000105c0 RSI: 0000200000010600 RDI: 00007fd289f1aea0 RBP: 00002000000105c0 R08: 00007fd289f1aee0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000010600 R13: 00007fd289f1aea0 R14: 0000000000010594 R15: 0000200000000600 ================================================================================ F2FS-fs (loop1): Not support 8589934592, larger than 256