qlop: fix crash w/corrupted log files

If a file is truncated/corrupted, make sure we don't read past the end
of the valid buffer.

URL: https://bugs.gentoo.org/573106
Reported-by: Agostino Sarubbo <ago@gentoo.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/qlop.c b/qlop.c
index 546c3531..bb324743 100644
--- a/qlop.c
+++ b/qlop.c
@@ -265,6 +265,9 @@ show_emerge_history(char listflag, int argc, char **argv, const char *logfile)
 			continue;
 		*p = 0;
 		q = p + 3;
+		/* Make sure there's leading white space and not a truncated string. #573106 */
+		if (p[1] != ' ' || p[2] != ' ')
+			continue;
 
 		t = (time_t) atol(buf);