Re: [PATCH 6.12 471/512] fs/filesystems: Fix potential unsigned integer underflow in fs_name()

Hi!

...

How could it underflow? for (..., index) already means we break the loop. I don't see underflow possibility.

let us assume list @file_systems has 1000 entries, and think about what will happen for below scenario.

for invocation fs_name(0, ...) but the first try_module_get() fails.

@index underflow will cause extra and unnecessary 999 cycles.

You are right, I misparsed the code.

Best regards, Pavel