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ITS#7485 check maxkeysize in mdb_cursor_put

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Also MDB_MAXKEYSIZE is redefinable at compile time.
This commit is contained in:
Howard Chu 2013-01-14 13:12:15 -08:00
parent 9e35127f1d
commit 25a99d4024
1 changed files with 23 additions and 14 deletions
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37
libraries/liblmdb/mdb.c
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@ -342,19 +342,25 @@ static txnid_t mdb_debug_start;
/** The version number for a database's file format. */ /** The version number for a database's file format. */
#define MDB_VERSION 1 #define MDB_VERSION 1
/** The maximum size of a key in the database. /** @brief The maximum size of a key in the database.
*
* While data items have essentially unbounded size, we require that * While data items have essentially unbounded size, we require that
* keys all fit onto a regular page. This limit could be raised a bit * keys all fit onto a regular page. This limit could be raised a bit
* further if needed; to something just under #MDB_PAGESIZE / #MDB_MINKEYS. * further if needed; to something just under #MDB_PAGESIZE / #MDB_MINKEYS.
*
* Note that data items in an #MDB_DUPSORT database are actually keys
* of a subDB, so they're also limited to this size.
*/ */
#define MAXKEYSIZE 511 #ifndef MDB_MAXKEYSIZE
#define MDB_MAXKEYSIZE 511
#endif
#if MDB_DEBUG #if MDB_DEBUG
/** A key buffer. /** A key buffer.
* @ingroup debug * @ingroup debug
* This is used for printing a hex dump of a key's contents. * This is used for printing a hex dump of a key's contents.
*/ */
#define DKBUF char kbuf[(MAXKEYSIZE*2+1)] #define DKBUF char kbuf[(MDB_MAXKEYSIZE*2+1)]
/** Display a key in hex. /** Display a key in hex.
* @ingroup debug * @ingroup debug
* Invoke a function to display a key in hex. * Invoke a function to display a key in hex.
@ -1081,8 +1087,8 @@ mdb_dkey(MDB_val *key, char *buf)
char *ptr = buf; char *ptr = buf;
unsigned char *c = key->mv_data; unsigned char *c = key->mv_data;
unsigned int i; unsigned int i;
if (key->mv_size > MAXKEYSIZE) if (key->mv_size > MDB_MAXKEYSIZE)
return "MAXKEYSIZE"; return "MDB_MAXKEYSIZE";
/* may want to make this a dynamic check: if the key is mostly /* may want to make this a dynamic check: if the key is mostly
* printable characters, print it as-is instead of converting to hex. * printable characters, print it as-is instead of converting to hex.
*/ */
@ -2176,7 +2182,7 @@ free2:
MDB_val key, data; MDB_val key, data;
/* make sure last page of freeDB is touched and on freelist */ /* make sure last page of freeDB is touched and on freelist */
key.mv_size = MAXKEYSIZE+1; key.mv_size = MDB_MAXKEYSIZE+1;
key.mv_data = NULL; key.mv_data = NULL;
rc = mdb_page_search(&mc, &key, MDB_PS_MODIFY); rc = mdb_page_search(&mc, &key, MDB_PS_MODIFY);
if (rc && rc != MDB_NOTFOUND) if (rc && rc != MDB_NOTFOUND)
@ -3954,7 +3960,7 @@ mdb_page_search_root(MDB_cursor *mc, MDB_val *key, int modify)
if (key == NULL) /* Initialize cursor to first page. */ if (key == NULL) /* Initialize cursor to first page. */
i = 0; i = 0;
else if (key->mv_size > MAXKEYSIZE && key->mv_data == NULL) { else if (key->mv_size > MDB_MAXKEYSIZE && key->mv_data == NULL) {
/* cursor to last page */ /* cursor to last page */
i = NUMKEYS(mp)-1; i = NUMKEYS(mp)-1;
} else { } else {
@ -4130,7 +4136,7 @@ mdb_get(MDB_txn *txn, MDB_dbi dbi,
if (txn == NULL || !dbi || dbi >= txn->mt_numdbs) if (txn == NULL || !dbi || dbi >= txn->mt_numdbs)
return EINVAL; return EINVAL;
if (key->mv_size == 0 || key->mv_size > MAXKEYSIZE) { if (key->mv_size == 0 || key->mv_size > MDB_MAXKEYSIZE) {
return EINVAL; return EINVAL;
} }
@ -4572,7 +4578,7 @@ mdb_cursor_last(MDB_cursor *mc, MDB_val *key, MDB_val *data)
if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) { if (!(mc->mc_flags & C_INITIALIZED) || mc->mc_top) {
MDB_val lkey; MDB_val lkey;
lkey.mv_size = MAXKEYSIZE+1; lkey.mv_size = MDB_MAXKEYSIZE+1;
lkey.mv_data = NULL; lkey.mv_data = NULL;
rc = mdb_page_search(mc, &lkey, 0); rc = mdb_page_search(mc, &lkey, 0);
if (rc != MDB_SUCCESS) if (rc != MDB_SUCCESS)
@ -4656,7 +4662,7 @@ mdb_cursor_get(MDB_cursor *mc, MDB_val *key, MDB_val *data,
case MDB_SET: case MDB_SET:
case MDB_SET_KEY: case MDB_SET_KEY:
case MDB_SET_RANGE: case MDB_SET_RANGE:
if (key == NULL || key->mv_size == 0 || key->mv_size > MAXKEYSIZE) { if (key == NULL || key->mv_size == 0 || key->mv_size > MDB_MAXKEYSIZE) {
rc = EINVAL; rc = EINVAL;
} else if (op == MDB_SET_RANGE) } else if (op == MDB_SET_RANGE)
rc = mdb_cursor_set(mc, key, data, op, NULL); rc = mdb_cursor_set(mc, key, data, op, NULL);
@ -4793,13 +4799,16 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
size_t nsize; size_t nsize;
int rc, rc2; int rc, rc2;
MDB_pagebuf pbuf; MDB_pagebuf pbuf;
char dbuf[MAXKEYSIZE+1]; char dbuf[MDB_MAXKEYSIZE+1];
unsigned int nflags; unsigned int nflags;
DKBUF; DKBUF;
if (F_ISSET(mc->mc_txn->mt_flags, MDB_TXN_RDONLY)) if (F_ISSET(mc->mc_txn->mt_flags, MDB_TXN_RDONLY))
return EACCES; return EACCES;
if (key->mv_size == 0 || key->mv_size > MDB_MAXKEYSIZE)
return EINVAL;
DPRINTF("==> put db %u key [%s], size %zu, data size %zu", DPRINTF("==> put db %u key [%s], size %zu, data size %zu",
mc->mc_dbi, DKEY(key), key ? key->mv_size:0, data->mv_size); mc->mc_dbi, DKEY(key), key ? key->mv_size:0, data->mv_size);
@ -5769,7 +5778,7 @@ mdb_update_key(MDB_page *mp, indx_t indx, MDB_val *key)
#if MDB_DEBUG #if MDB_DEBUG
{ {
MDB_val k2; MDB_val k2;
char kbuf2[(MAXKEYSIZE*2+1)]; char kbuf2[(MDB_MAXKEYSIZE*2+1)];
k2.mv_data = NODEKEY(node); k2.mv_data = NODEKEY(node);
k2.mv_size = node->mn_ksize; k2.mv_size = node->mn_ksize;
DPRINTF("update key %u (ofs %u) [%s] to [%s] on page %zu", DPRINTF("update key %u (ofs %u) [%s] to [%s] on page %zu",
@ -6321,7 +6330,7 @@ mdb_del(MDB_txn *txn, MDB_dbi dbi,
return EACCES; return EACCES;
} }
if (key->mv_size == 0 || key->mv_size > MAXKEYSIZE) { if (key->mv_size == 0 || key->mv_size > MDB_MAXKEYSIZE) {
return EINVAL; return EINVAL;
} }
@ -6760,7 +6769,7 @@ mdb_put(MDB_txn *txn, MDB_dbi dbi,
return EACCES; return EACCES;
} }
if (key->mv_size == 0 || key->mv_size > MAXKEYSIZE) { if (key->mv_size == 0 || key->mv_size > MDB_MAXKEYSIZE) {
return EINVAL; return EINVAL;
} }