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keys, dns: Drop unused NUL terminator from upayload->data

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upayload->data includes an extra NUL terminator even though it is never
used as a C string. In-tree users access only the first
upayload->datalen bytes.

Remove the redundant NUL terminator and allocate one byte less for
upayload->data in dns_resolver_preparse().

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260806200454.245444-3-thorsten.blum@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Thorsten Blum 2026-08-06 22:04:54 +02:00 committed by Jakub Kicinski
parent fd23a7c973
commit f1529936c0
1 changed files with 1 additions and 2 deletions
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3
net/dns_resolver/dns_key.c
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@ -203,7 +203,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
kdebug("store result");
prep->quotalen = result_len;
upayload = kmalloc_flex(*upayload, data, result_len + 1);
upayload = kmalloc_flex(*upayload, data, result_len);
if (!upayload) {
kleave(" = -ENOMEM");
return -ENOMEM;
@ -211,7 +211,6 @@ dns_resolver_preparse(struct key_preparsed_payload *prep)
upayload->datalen = result_len;
memcpy(upayload->data, data, result_len);
upayload->data[result_len] = '\0';
prep->payload.data[dns_key_data] = upayload;
kleave(" = 0");