Thread (14 messages) 14 messages, 4 authors, 2021-08-16

Re: [PATCH 1/1] NAX LSM: Add initial support support

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From: Igor Zhbanov <hidden>
Date: 2021-08-13 08:06:02
Also in: linux-integrity

Hi Simon,
Yes, what I meant was that maybe you could just declare it at the beginning of the function,
and not use it at all in the sysctl table. Because as I see it, you only use allowed_caps_hex in the sysctl
table to copy the string to that temporary (variable), and its use is limited to that one function.

Instead of:

+               if ((error = proc_dostring(table, write, buffer, lenp, ppos)))
+                       return error;
...
You could probably get away with something like:
...
+       strncpy(allowed_caps_hex, buffer, ALLOWED_CAPS_HEX_LEN + 1);
proc_dostring() is more than simple strncpy(). It is handling offsets too.
I.e. if a user will try to write not from the starting position. But
I've seen that some
functions simply create an instance of struct ctl_table, fill it and
call needed function.

Thanks.
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