readprofile: check input file is not empty [asan]

Addresses: https://github.com/karelzak/util-linux/issues/717
Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/sys-utils/readprofile.c b/sys-utils/readprofile.c
index 035073847a36f040668f17571254605b1566dbbe..75a623bc98757ba739b89d139f89be484b2b1527 100644 (file)
--- a/sys-utils/readprofile.c
+++ b/sys-utils/readprofile.c
@@ -246,6 +246,8 @@ int main(int argc, char **argv)
            || ((int)(len = lseek(proFd, 0, SEEK_END)) < 0)
            || (lseek(proFd, 0, SEEK_SET) < 0))
                err(EXIT_FAILURE, "%s", proFile);
+       if (!len)
+               errx(EXIT_FAILURE, "%s: %s", proFile, _("input file is empty"));
 
        buf = xmalloc(len);