[PATCH] SUNRPC: check mlen in ip_map_parse()
From: Ma Ke
Date: Sun Jun 23 2024 - 22:32:25 EST
We should check the parameter mlen before using 'mlen - 1'
expression for the 'mesg' array index.
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
---
net/sunrpc/svcauth_unix.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 04b45588ae6f..816bf56597dd 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -196,7 +196,7 @@ static int ip_map_parse(struct cache_detail *cd,
struct auth_domain *dom;
time64_t expiry;
- if (mesg[mlen-1] != '\n')
+ if (mlen && mesg[mlen - 1] != '\n')
return -EINVAL;
mesg[mlen-1] = 0;
--
2.25.1