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fpc: Prevent overflow when reading the print identity

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Reported by: Keith Linneman (LinnemanLabs)
This commit is contained in:
Marco Trevisan (Treviño)
2026-07-13 08:13:46 +00:00
committed by Marco Trevisan
parent 3cc0ae79e7
commit c025abcd15
1 changed files with 6 additions and 2 deletions
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libfprint/drivers/fpcmoc/fpc.c
+6 -2
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@@ -635,14 +635,18 @@ fpc_print_from_data (FpiDeviceFpcMoc *self, fpc_fid_data_t *fid_data)
FpPrint *print = NULL;
GVariant *data;
GVariant *uid;
guint32 identity_size;
g_autofree gchar *userid = NULL;
userid = g_strndup ((gchar *) fid_data->identity, fid_data->identity_size);
identity_size = MIN (fid_data->identity_size, sizeof (fid_data->identity));
g_warn_if_fail (identity_size <= sizeof (fid_data->identity));
userid = g_strndup ((gchar *) fid_data->identity, identity_size);
print = fp_print_new (FP_DEVICE (self));
uid = g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE,
fid_data->identity,
fid_data->identity_size,
identity_size,
1);
data = g_variant_new ("(y@ay)",