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zipl-editenv: Check in-bootmap environment block validity

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Check decimal prefixes, representing site values in on-disk
environment block. Reject any values different from {0, ..., 9}
as invalid ones.

Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Eduard Shishkin <edward6@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Eduard Shishkin
2026-07-15 11:31:17 +02:00
committed by Jan Höppner
parent 224e35b600
commit 78676df2f0
1 changed files with 5 additions and 1 deletions
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6
zipl/src/envblk.c
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@@ -675,8 +675,12 @@ static int add_line_namespace(char *this, void *data)
int val;
val = strtol(this, &endptr, 10);
if (endptr == this)
if (endptr == this) {
val = MAX_NR_SITES;
} else if (val < 0 || val >= MAX_NR_SITES) {
error_reason("Bad site value (%d)", val);
return -EINVAL;
}
if (!tables[val]) {
tables[val] =
util_zalloc(LINE_HASH_SIZE * sizeof(*tables));