From: Craig Small <csmall@dropbear.xyz>
Date: Mon, 2 Mar 2020 11:08:27 +0000 (+1100)
Subject: peekfd: Check return value of malloc
X-Git-Tag: v23.4rc1~20
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=edad7cd77c5b95db2f7fe4e3678e7444a1bcc399;p=psmisc

peekfd: Check return value of malloc

If malloc returned null on lastbuf then we would have had a
derefencing NULL issue.

References:
 Coverity 46258
---

diff --git a/src/peekfd.c b/src/peekfd.c
index f41391a..360b2f7 100644
--- a/src/peekfd.c
+++ b/src/peekfd.c
@@ -415,7 +415,8 @@ int main(int argc, char **argv)
 						if (remove_duplicates) {
 							if (lastbuf)
 								free(lastbuf);
-							lastbuf = malloc(regs.REG_PARAM3);
+							if ( NULL == (lastbuf = malloc(regs.REG_PARAM3)))
+							    perror("lastbuf malloc");
 							last_buf_size = regs.REG_PARAM3;
 						}