From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 6 Dec 2023 13:00:35 +0000 (+0100)
Subject: ucode: check for errors in ftruncate()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;ds=inline;p=project%2Fudebug.git

ucode: check for errors in ftruncate()

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

diff --git a/lib-ucode.c b/lib-ucode.c
index d50fd90..c2ce3b2 100644
--- a/lib-ucode.c
+++ b/lib-ucode.c
@@ -327,7 +327,10 @@ uc_udebug_pcap_file(uc_vm_t *vm, size_t nargs)
 
 	if (ucv_type(file) == UC_STRING) {
 		fd = open(ucv_string_get(file), O_WRONLY | O_CREAT, 0644);
-		ftruncate(fd, 0);
+		if (ftruncate(fd, 0) < 0) {
+			close(fd);
+			return NULL;
+		}
 	} else if (!file)
 		fd = STDOUT_FILENO;