diff options
Diffstat (limited to 'misc/mntent_r.c')
| -rw-r--r-- | misc/mntent_r.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/misc/mntent_r.c b/misc/mntent_r.c index 615987347a..4f269984d7 100644 --- a/misc/mntent_r.c +++ b/misc/mntent_r.c @@ -136,7 +136,9 @@ __getmntent_r (FILE *stream, struct mntent *mp, char *buffer, int bufsiz) end_ptr = strchr (buffer, '\n'); if (end_ptr != NULL) /* chop newline */ { - while (end_ptr[-1] == ' ' || end_ptr[-1] == '\t') + /* Do not walk past the start of buffer if it's all whitespace. */ + while (end_ptr != buffer + && (end_ptr[-1] == ' ' || end_ptr[-1] == '\t')) end_ptr--; *end_ptr = '\0'; } |