diff options
| -rw-r--r-- | libbb/find_mount_point.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/libbb/find_mount_point.c b/libbb/find_mount_point.c index 94bbf1d4a..0e1be3820 100644 --- a/libbb/find_mount_point.c +++ b/libbb/find_mount_point.c @@ -56,11 +56,22 @@ struct mntent* FAST_FUNC find_mount_point(const char *name, int subdir_too) continue; /* Is device's dev_t == name's dev_t? */ - if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == devno_of_name) + if (mountEntry->mnt_fsname[0] == '/' + /* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + * avoid stat'ing "sysfs", "proc", "none" and such, + * useless at best, can stat unrelated files at worst. + */ + && stat(mountEntry->mnt_fsname, &s) == 0 + && s.st_rdev == devno_of_name + ) { break; + } /* Match the directory's mount point. */ - if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == devno_of_name) + if (stat(mountEntry->mnt_dir, &s) == 0 + && s.st_dev == devno_of_name + ) { break; + } } endmntent(mtab_fp); |