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harden buf_cache

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condret 2024-08-08 08:59:28 +02:00 committed by pancake
parent 13af8b5aa5
commit b0ab249dfd
1 changed files with 14 additions and 0 deletions
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14
libr/util/buf_cache.c
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@ -90,10 +90,18 @@ static RRBNode *_find_entry_ci_node(RRBTree *cache_tree, RInterval *itv) {
return node;
}
static st64 buf_cache_seek(RBuffer *b, st64 addr, int whence);
static st64 buf_cache_read(RBuffer *b, ut8 *buf, ut64 len) {
R_RETURN_VAL_IF_FAIL (b && buf && (len > 0), false);
RBufCache *priv = get_priv_cache_bytes (b);
ut64 addr = priv->offset;
if ((UT64_MAX - len + 1) < addr) {
st64 ret = buf_cache_read (b, buf, UT64_MAX - addr + 1);
len = len - (UT64_MAX - addr + 1);
buf_cache_seek (b, 0LL, R_BUF_SET);
return ret + buf_cache_read (b, &buf[UT64_MAX - addr + 1], len);
}
RInterval itv = (RInterval){addr, len};
r_buf_read_at (priv->sb, addr, buf, len);
RIOCacheLayer *layer = priv->cl; // r_list_last (io->cache.layers);
@ -147,6 +155,12 @@ static st64 buf_cache_write(RBuffer *b, const ut8 *buf, ut64 len) {
RBufCache *priv = get_priv_cache_bytes (b);
ut64 addr = priv->offset;
if ((UT64_MAX - len + 1) < addr) {
st64 ret = buf_cache_write (b, buf, UT64_MAX - addr + 1);
len = len - (UT64_MAX - addr + 1);
buf_cache_seek (b, 0LL, R_BUF_SET);
return ret + buf_cache_write (b, &buf[UT64_MAX - addr + 1], len);
}
RInterval itv = (RInterval){addr, len};
RIOCacheItem *ci = iocache_item_new (&itv);
if (!ci) {