diff options
| -rw-r--r-- | security/selinux/ss/ebitmap.c | 36 |
1 files changed, 16 insertions, 20 deletions
diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c index 4b915eb60c4..cfed1d30fa6 100644 --- a/security/selinux/ss/ebitmap.c +++ b/security/selinux/ss/ebitmap.c @@ -145,29 +145,28 @@ int ebitmap_import(const unsigned char *src, struct ebitmap *dst) { size_t src_off = 0; + size_t node_limit; struct ebitmap_node *node_new; struct ebitmap_node *node_last = NULL; - size_t iter; - size_t iter_bit; - size_t iter_limit; + u32 i_byte; + u32 i_bit; unsigned char src_byte; - do { - iter_limit = src_len - src_off; - if (iter_limit >= sizeof(MAPTYPE)) { + while (src_off < src_len) { + if (src_len - src_off >= sizeof(MAPTYPE)) { if (*(MAPTYPE *)&src[src_off] == 0) { src_off += sizeof(MAPTYPE); continue; } - iter_limit = sizeof(MAPTYPE); + node_limit = sizeof(MAPTYPE); } else { - iter = src_off; - src_byte = 0; - do { - src_byte |= src[iter++]; - } while (iter < src_len && src_byte == 0); + for (src_byte = 0, i_byte = src_off; + i_byte < src_len && src_byte == 0; + i_byte++) + src_byte |= src[i_byte]; if (src_byte == 0) break; + node_limit = src_len - src_off; } node_new = kzalloc(sizeof(*node_new), GFP_ATOMIC); @@ -176,24 +175,21 @@ int ebitmap_import(const unsigned char *src, return -ENOMEM; } node_new->startbit = src_off * 8; - iter = 0; - do { + for (i_byte = 0; i_byte < node_limit; i_byte++) { src_byte = src[src_off++]; - iter_bit = iter++ * 8; - while (src_byte != 0) { + for (i_bit = i_byte * 8; src_byte != 0; i_bit++) { if (src_byte & 0x80) - node_new->map |= MAPBIT << iter_bit; - iter_bit++; + node_new->map |= MAPBIT << i_bit; src_byte <<= 1; } - } while (iter < iter_limit); + } if (node_last != NULL) node_last->next = node_new; else dst->node = node_new; node_last = node_new; - } while (src_off < src_len); + } if (likely(node_last != NULL)) dst->highbit = node_last->startbit + MAPSIZE; |