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module: Give MODULE_SIG_STRING a more descriptive name

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The purpose of the constant it is not entirely clear from its name.

As this constant is going to be exposed in a UAPI header, give it a more
specific name for clarity. As all its users call it 'marker', use that
wording in the constant itself.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: Petr Pavlu <petr.pavlu@suse.com>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
This commit is contained in:
Thomas Weißschuh
2026-03-05 10:31:40 +01:00
committed by Sami Tolvanen
parent acd87264af
commit 2ae4ea2d9a
4 changed files with 8 additions and 8 deletions
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4
kernel/module/signing.c
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@@ -70,7 +70,7 @@ int mod_verify_sig(const void *mod, struct load_info *info)
int module_sig_check(struct load_info *info, int flags)
{
int err = -ENODATA;
const unsigned long markerlen = sizeof(MODULE_SIG_STRING) - 1;
const unsigned long markerlen = sizeof(MODULE_SIGNATURE_MARKER) - 1;
const char *reason;
const void *mod = info->hdr;
bool mangled_module = flags & (MODULE_INIT_IGNORE_MODVERSIONS |
@@ -81,7 +81,7 @@ int module_sig_check(struct load_info *info, int flags)
*/
if (!mangled_module &&
info->len > markerlen &&
memcmp(mod + info->len - markerlen, MODULE_SIG_STRING, markerlen) == 0) {
memcmp(mod + info->len - markerlen, MODULE_SIGNATURE_MARKER, markerlen) == 0) {
/* We truncate the module to discard the signature */
info->len -= markerlen;
err = mod_verify_sig(mod, info);