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-rw-r--r--sbin/dmesg/dmesg.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sbin/dmesg/dmesg.c b/sbin/dmesg/dmesg.c
index 9fee41664b30..827ed8e28c2b 100644
--- a/sbin/dmesg/dmesg.c
+++ b/sbin/dmesg/dmesg.c
@@ -118,6 +118,9 @@ main(int argc, char *argv[])
*/
if (sysctlbyname("kern.msgbuf", NULL, &buflen, NULL, 0) == -1)
err(1, "sysctl kern.msgbuf");
+ /* Allocate extra room for growth between the sysctl calls. */
+ buflen += buflen/8;
+ /* Allocate more than sysctl sees, for room to append \n\0. */
if ((bp = malloc(buflen + 2)) == NULL)
errx(1, "malloc failed");
if (sysctlbyname("kern.msgbuf", bp, &buflen, NULL, 0) == -1)