kallsyms: Handle too long symbols in kallsyms.c

BugLink: https://bugs.launchpad.net/bugs/1837952
[ Upstream commit 6db2983cd8064808141ccefd75218f5b4345ffae ]

When checking for symbols with excessively long names,
account for null terminating character.

Fixes: f3462aa952cf ("Kbuild: Handle longer symbols in kallsyms.c")
Signed-off-by: Eugene Loh <eugene.loh@oracle.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 1dd24c5b9b47406c7e9759272e07c90fdd3ec2ab..93ec96d4a558a69e5f5ba0c92e27bfcaf7399e0f 100644 (file)
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -123,8 +123,8 @@ static int read_symbol(FILE *in, struct sym_entry *s)
                        fprintf(stderr, "Read error or end of file.\n");
                return -1;
        }
-       if (strlen(str) > KSYM_NAME_LEN) {
-               fprintf(stderr, "Symbol %s too long for kallsyms (%zu vs %d).\n"
+       if (strlen(str) >= KSYM_NAME_LEN) {
+               fprintf(stderr, "Symbol %s too long for kallsyms (%zu >= %d).\n"
                                "Please increase KSYM_NAME_LEN both in kernel and kallsyms.c\n",
                        str, strlen(str), KSYM_NAME_LEN);
                return -1;