diff options
Diffstat (limited to 'security/selinux/ss/ebitmap.c')
| -rw-r--r-- | security/selinux/ss/ebitmap.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c index 8f624f80055bd..c8c3663111e27 100644 --- a/security/selinux/ss/ebitmap.c +++ b/security/selinux/ss/ebitmap.c @@ -77,6 +77,24 @@ int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src) return 0; } +int ebitmap_and(struct ebitmap *dst, struct ebitmap *e1, struct ebitmap *e2) +{ + struct ebitmap_node *n; + int bit, rc; + + ebitmap_init(dst); + + ebitmap_for_each_positive_bit(e1, n, bit) { + if (ebitmap_get_bit(e2, bit)) { + rc = ebitmap_set_bit(dst, bit, 1); + if (rc < 0) + return rc; + } + } + return 0; +} + + #ifdef CONFIG_NETLABEL /** * ebitmap_netlbl_export - Export an ebitmap into a NetLabel category bitmap @@ -347,7 +365,9 @@ int ebitmap_read(struct ebitmap *e, void *fp) { struct ebitmap_node *n = NULL; u32 mapunit, count, startbit, index; + __le32 ebitmap_start; u64 map; + __le64 mapbits; __le32 buf[3]; int rc, i; @@ -381,12 +401,12 @@ int ebitmap_read(struct ebitmap *e, void *fp) goto bad; for (i = 0; i < count; i++) { - rc = next_entry(&startbit, fp, sizeof(u32)); + rc = next_entry(&ebitmap_start, fp, sizeof(u32)); if (rc < 0) { pr_err("SELinux: ebitmap: truncated map\n"); goto bad; } - startbit = le32_to_cpu(startbit); + startbit = le32_to_cpu(ebitmap_start); if (startbit & (mapunit - 1)) { pr_err("SELinux: ebitmap start bit (%d) is " @@ -423,12 +443,12 @@ int ebitmap_read(struct ebitmap *e, void *fp) goto bad; } - rc = next_entry(&map, fp, sizeof(u64)); + rc = next_entry(&mapbits, fp, sizeof(u64)); if (rc < 0) { pr_err("SELinux: ebitmap: truncated map\n"); goto bad; } - map = le64_to_cpu(map); + map = le64_to_cpu(mapbits); index = (startbit - n->startbit) / EBITMAP_UNIT_SIZE; while (map) { |