diff options
| -rw-r--r-- | src/shared/utmp-wtmp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/shared/utmp-wtmp.c b/src/shared/utmp-wtmp.c index 046fb584fb..8717dbac2d 100644 --- a/src/shared/utmp-wtmp.c +++ b/src/shared/utmp-wtmp.c @@ -403,10 +403,12 @@ int utmp_wall(const char *message, bool (*match_tty)(const char *tty)) { if (u->ut_type != USER_PROCESS || u->ut_user[0] == 0) continue; + /* this access is fine, because strlen("/dev/") << 32 (UT_LINESIZE) */ if (path_startswith(u->ut_line, "/dev/")) path = u->ut_line; else { - if (asprintf(&buf, "/dev/%s", u->ut_line) < 0) { + if (asprintf(&buf, "/dev/%.*s", + sizeof(u->ut_line), u->ut_line) < 0) { r = -ENOMEM; goto finish; } |