Messages in this thread | | | From | Linus Torvalds <> | Date | Sat, 13 Aug 2022 14:37:49 -0700 | Subject | Re: [PULL REQUEST] i2c-for-5.20-part2 |
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On Sat, Aug 13, 2022 at 8:42 AM Wolfram Sang <wsa@kernel.org> wrote: > > * subsystem-wide move from strlcpy to strscpy
Hmm.
Looking around, we still do have a lot of those 'strlcpy()' users, but 99% of them don't use the return value.
And since 'strlcpy()' is complete and utter garbage exactly *BECAUSE* of the bad return value (it returns the length of the source string - but an untrusted and possibly unterminated source string is often the *problem* in the first place), that would make it fairly easy to convert the rest.
I see two possibilities:
(a) fix strlcpy() by making it return 'void', and leave all those 99% of users alone, and convert the (few) cases that actually look at the return value to strscpy
(b) auto-convert (with a coccinelle script) all the 'strlcpy()' users that don't care about the return value, and leave a few broken users of strlcpy around
I think (b) is the simpler thing, but I have no idea how to write a coccinelle patch that basically does "if return value of strlcpy is not used, convert the strlcpy to a strscpy".
I'd love to get rid of strlcpy() entirely, since it's such a horribly badly designed thing.
Linus
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