================================================================================ UBSAN: shift-out-of-bounds in fs/f2fs/super.c:942:5 shift exponent 165 is too large for 64-bit type 'unsigned long' CPU: 1 PID: 5056 Comm: syz.4.1279 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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_remount+0x47f/0x1e20 fs/f2fs/super.c:2437 legacy_reconfigure+0x109/0x120 fs/fs_context.c:655 reconfigure_super+0x228/0x8a0 fs/super.c:982 do_remount fs/namespace.c:2742 [inline] path_mount+0xdb5/0xfc0 fs/namespace.c:3403 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: 0033:0x7f215dd9da8a 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:00007f215ec01e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f215ec01ee0 RCX: 00007f215dd9da8a RDX: 0000200000000180 RSI: 0000200000000000 RDI: 0000000000000000 RBP: 0000200000000180 R08: 00007f215ec01ee0 R09: 00000000018424bc R10: 00000000018424bc R11: 0000000000000246 R12: 0000200000000000 R13: 00007f215ec01ea0 R14: 0000000000000000 R15: 00002000000003c0 ================================================================================ F2FS-fs (loop4): Not support 137438953472, larger than 256