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redis.28077
cve-2021-32627.patch
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File cve-2021-32627.patch of Package redis.28077
From f6a40570fa63d5afdd596c78083d754081d80ae3 Mon Sep 17 00:00:00 2001 From: Oran Agra <oran@redislabs.com> Date: Thu, 3 Jun 2021 12:10:02 +0300 Subject: [PATCH] Fix ziplist and listpack overflows and truncations (CVE-2021-32627, CVE-2021-32628) - fix possible heap corruption in ziplist and listpack resulting by trying to allocate more than the maximum size of 4GB. - prevent ziplist (hash and zset) from reaching size of above 1GB, will be converted to HT encoding, that's not a useful size. - prevent listpack (stream) from reaching size of above 1GB. - XADD will start a new listpack if the new record may cause the previous listpack to grow over 1GB. - XADD will respond with an error if a single stream record is over 1GB - List type (ziplist in quicklist) was truncating strings that were over 4GB, now it'll respond with an error. --- src/geo.c | 5 +- src/listpack.c | 2 +- src/quicklist.c | 17 ++++- src/rdb.c | 36 ++++++--- src/server.h | 2 +- src/t_hash.c | 13 +++- src/t_list.c | 30 ++++++++ src/t_stream.c | 48 +++++++++--- src/t_zset.c | 43 +++++++---- src/ziplist.c | 17 ++++- src/ziplist.h | 1 + tests/support/util.tcl | 18 ++++- tests/unit/violations.tcl | 156 ++++++++++++++++++++++++++++++++++++++ 13 files changed, 339 insertions(+), 49 deletions(-) create mode 100644 tests/unit/violations.tcl diff --git a/src/geo.c b/src/geo.c index 5c505441486c..a8710cd8b3ae 100644 --- a/src/geo.c +++ b/src/geo.c @@ -635,7 +635,7 @@ void georadiusGeneric(client *c, int flags) { robj *zobj; zset *zs; int i; - size_t maxelelen = 0; + size_t maxelelen = 0, totelelen = 0; if (returned_items) { zobj = createZsetObject(); @@ -650,13 +650,14 @@ void georadiusGeneric(client *c, int flags) { size_t elelen = sdslen(gp->member); if (maxelelen < elelen) maxelelen = elelen; + totelelen += elelen; znode = zslInsert(zs->zsl,score,gp->member); serverAssert(dictAdd(zs->dict,gp->member,&znode->score) == DICT_OK); gp->member = NULL; } if (returned_items) { - zsetConvertToZiplistIfNeeded(zobj,maxelelen); + zsetConvertToZiplistIfNeeded(zobj,maxelelen,totelelen); setKey(c,c->db,storekey,zobj); decrRefCount(zobj); notifyKeyspaceEvent(NOTIFY_ZSET,"georadiusstore",storekey, diff --git a/src/listpack.c b/src/listpack.c index f8c34429ec1e..6c111e83e029 100644 --- a/src/listpack.c +++ b/src/listpack.c @@ -283,7 +283,7 @@ int lpEncodeGetType(unsigned char *ele, uint32_t size, unsigned char *intenc, ui } else { if (size < 64) *enclen = 1+size; else if (size < 4096) *enclen = 2+size; - else *enclen = 5+size; + else *enclen = 5+(uint64_t)size; return LP_ENCODING_STRING; } } diff --git a/src/quicklist.c b/src/quicklist.c index 52e3988f59b1..c4bf5274eb05 100644 --- a/src/quicklist.c +++ b/src/quicklist.c @@ -29,6 +29,7 @@ */ #include <string.h> /* for memcpy */ +#include "redisassert.h" #include "quicklist.h" #include "zmalloc.h" #include "ziplist.h" @@ -43,11 +44,16 @@ #define REDIS_STATIC static #endif -/* Optimization levels for size-based filling */ +/* Optimization levels for size-based filling. + * Note that the largest possible limit is 16k, so even if each record takes + * just one byte, it still won't overflow the 16 bit count field. */ static const size_t optimization_level[] = {4096, 8192, 16384, 32768, 65536}; /* Maximum size in bytes of any multi-element ziplist. - * Larger values will live in their own isolated ziplists. */ + * Larger values will live in their own isolated ziplists. + * This is used only if we're limited by record count. when we're limited by + * size, the maximum limit is bigger, but still safe. + * 8k is a recommended / default size limit */ #define SIZE_SAFETY_LIMIT 8192 /* Minimum ziplist size in bytes for attempting compression. */ @@ -449,6 +455,8 @@ REDIS_STATIC int _quicklistNodeAllowInsert(const quicklistNode *node, unsigned int new_sz = node->sz + sz + ziplist_overhead; if (likely(_quicklistNodeSizeMeetsOptimizationRequirement(new_sz, fill))) return 1; + /* when we return 1 above we know that the limit is a size limit (which is + * safe, see comments next to optimization_level and SIZE_SAFETY_LIMIT) */ else if (!sizeMeetsSafetyLimit(new_sz)) return 0; else if ((int)node->count < fill) @@ -468,6 +476,8 @@ REDIS_STATIC int _quicklistNodeAllowMerge(const quicklistNode *a, unsigned int merge_sz = a->sz + b->sz - 11; if (likely(_quicklistNodeSizeMeetsOptimizationRequirement(merge_sz, fill))) return 1; + /* when we return 1 above we know that the limit is a size limit (which is + * safe, see comments next to optimization_level and SIZE_SAFETY_LIMIT) */ else if (!sizeMeetsSafetyLimit(merge_sz)) return 0; else if ((int)(a->count + b->count) <= fill) @@ -487,6 +497,7 @@ REDIS_STATIC int _quicklistNodeAllowMerge(const quicklistNode *a, * Returns 1 if new head created. */ int quicklistPushHead(quicklist *quicklist, void *value, size_t sz) { quicklistNode *orig_head = quicklist->head; + assert(sz < UINT32_MAX); /* TODO: add support for quicklist nodes that are sds encoded (not zipped) */ if (likely( _quicklistNodeAllowInsert(quicklist->head, quicklist->fill, sz))) { quicklist->head->zl = @@ -510,6 +521,7 @@ int quicklistPushHead(quicklist *quicklist, void *value, size_t sz) { * Returns 1 if new tail created. */ int quicklistPushTail(quicklist *quicklist, void *value, size_t sz) { quicklistNode *orig_tail = quicklist->tail; + assert(sz < UINT32_MAX); /* TODO: add support for quicklist nodes that are sds encoded (not zipped) */ if (likely( _quicklistNodeAllowInsert(quicklist->tail, quicklist->fill, sz))) { quicklist->tail->zl = @@ -852,6 +864,7 @@ REDIS_STATIC void _quicklistInsert(quicklist *quicklist, quicklistEntry *entry, int fill = quicklist->fill; quicklistNode *node = entry->node; quicklistNode *new_node = NULL; + assert(sz < UINT32_MAX); /* TODO: add support for quicklist nodes that are sds encoded (not zipped) */ if (!node) { /* we have no reference node, so let's create only node in the list */ diff --git a/src/rdb.c b/src/rdb.c index ecd2c0e9870a..11cc41b56240 100644 --- a/src/rdb.c +++ b/src/rdb.c @@ -1561,7 +1561,7 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key) { } else if (rdbtype == RDB_TYPE_ZSET_2 || rdbtype == RDB_TYPE_ZSET) { /* Read list/set value. */ uint64_t zsetlen; - size_t maxelelen = 0; + size_t maxelelen = 0, totelelen = 0; zset *zs; if ((zsetlen = rdbLoadLen(rdb,NULL)) == RDB_LENERR) return NULL; @@ -1598,6 +1598,7 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key) { /* Don't care about integer-encoded strings. */ if (sdslen(sdsele) > maxelelen) maxelelen = sdslen(sdsele); + totelelen += sdslen(sdsele); znode = zslInsert(zs->zsl,score,sdsele); dictAdd(zs->dict,sdsele,&znode->score); @@ -1605,8 +1606,11 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key) { /* Convert *after* loading, since sorted sets are not stored ordered. */ if (zsetLength(o) <= server.zset_max_ziplist_entries && - maxelelen <= server.zset_max_ziplist_value) - zsetConvert(o,OBJ_ENCODING_ZIPLIST); + maxelelen <= server.zset_max_ziplist_value && + ziplistSafeToAdd(NULL, totelelen)) + { + zsetConvert(o,OBJ_ENCODING_ZIPLIST); + } } else if (rdbtype == RDB_TYPE_HASH) { uint64_t len; int ret; @@ -1635,21 +1639,25 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key) { return NULL; } - /* Add pair to ziplist */ - o->ptr = ziplistPush(o->ptr, (unsigned char*)field, - sdslen(field), ZIPLIST_TAIL); - o->ptr = ziplistPush(o->ptr, (unsigned char*)value, - sdslen(value), ZIPLIST_TAIL); - /* Convert to hash table if size threshold is exceeded */ if (sdslen(field) > server.hash_max_ziplist_value || - sdslen(value) > server.hash_max_ziplist_value) + sdslen(value) > server.hash_max_ziplist_value || + !ziplistSafeToAdd(o->ptr, sdslen(field)+sdslen(value))) { - sdsfree(field); - sdsfree(value); hashTypeConvert(o, OBJ_ENCODING_HT); + ret = dictAdd((dict*)o->ptr, field, value); + if (ret == DICT_ERR) { + rdbExitReportCorruptRDB("Duplicate hash fields detected"); + } break; } + + /* Add pair to ziplist */ + o->ptr = ziplistPush(o->ptr, (unsigned char*)field, + sdslen(field), ZIPLIST_TAIL); + o->ptr = ziplistPush(o->ptr, (unsigned char*)value, + sdslen(value), ZIPLIST_TAIL); + sdsfree(field); sdsfree(value); } @@ -1726,6 +1734,10 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key) { while ((zi = zipmapNext(zi, &fstr, &flen, &vstr, &vlen)) != NULL) { if (flen > maxlen) maxlen = flen; if (vlen > maxlen) maxlen = vlen; + if (!ziplistSafeToAdd(zl, (size_t)flen + vlen)) { + rdbExitReportCorruptRDB("Hash zipmap too big (%u)", flen); + } + zl = ziplistPush(zl, fstr, flen, ZIPLIST_TAIL); zl = ziplistPush(zl, vstr, vlen, ZIPLIST_TAIL); } diff --git a/src/server.h b/src/server.h index 530355421a8d..38774bbc2fa7 100644 --- a/src/server.h +++ b/src/server.h @@ -1999,7 +1999,7 @@ unsigned char *zzlFirstInRange(unsigned char *zl, zrangespec *range); unsigned char *zzlLastInRange(unsigned char *zl, zrangespec *range); unsigned long zsetLength(const robj *zobj); void zsetConvert(robj *zobj, int encoding); -void zsetConvertToZiplistIfNeeded(robj *zobj, size_t maxelelen); +void zsetConvertToZiplistIfNeeded(robj *zobj, size_t maxelelen, size_t totelelen); int zsetScore(robj *zobj, sds member, double *score); unsigned long zslGetRank(zskiplist *zsl, double score, sds o); int zsetAdd(robj *zobj, double score, sds ele, int *flags, double *newscore); diff --git a/src/t_hash.c b/src/t_hash.c index 8e79432a4fbd..3cdfdd169abf 100644 --- a/src/t_hash.c +++ b/src/t_hash.c @@ -39,17 +39,22 @@ * as their string length can be queried in constant time. */ void hashTypeTryConversion(robj *o, robj **argv, int start, int end) { int i; + size_t sum = 0; if (o->encoding != OBJ_ENCODING_ZIPLIST) return; for (i = start; i <= end; i++) { - if (sdsEncodedObject(argv[i]) && - sdslen(argv[i]->ptr) > server.hash_max_ziplist_value) - { + if (!sdsEncodedObject(argv[i])) + continue; + size_t len = sdslen(argv[i]->ptr); + if (len > server.hash_max_ziplist_value) { hashTypeConvert(o, OBJ_ENCODING_HT); - break; + return; } + sum += len; } + if (!ziplistSafeToAdd(o->ptr, sum)) + hashTypeConvert(o, OBJ_ENCODING_HT); } /* Get the value from a ziplist encoded hash, identified by field. diff --git a/src/t_list.c b/src/t_list.c index 4f0bd7b81a5d..621b6932759e 100644 --- a/src/t_list.c +++ b/src/t_list.c @@ -29,6 +29,8 @@ #include "server.h" +#define LIST_MAX_ITEM_SIZE ((1ull<<32)-1024) + /*----------------------------------------------------------------------------- * List API *----------------------------------------------------------------------------*/ @@ -196,6 +198,14 @@ void listTypeConvert(robj *subject, int enc) { void pushGenericCommand(client *c, int where) { int j, pushed = 0; + + for (j = 2; j < c->argc; j++) { + if (sdslen(c->argv[j]->ptr) > LIST_MAX_ITEM_SIZE) { + addReplyError(c, "Element too large"); + return; + } + } + robj *lobj = lookupKeyWrite(c->db,c->argv[1]); if (lobj && lobj->type != OBJ_LIST) { @@ -277,6 +287,11 @@ void linsertCommand(client *c) { return; } + if (sdslen(c->argv[4]->ptr) > LIST_MAX_ITEM_SIZE) { + addReplyError(c, "Element too large"); + return; + } + if ((subject = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL || checkType(c,subject,OBJ_LIST)) return; @@ -344,6 +359,11 @@ void lsetCommand(client *c) { long index; robj *value = c->argv[3]; + if (sdslen(value->ptr) > LIST_MAX_ITEM_SIZE) { + addReplyError(c, "Element too large"); + return; + } + if ((getLongFromObjectOrReply(c, c->argv[2], &index, NULL) != C_OK)) return; @@ -510,6 +530,11 @@ void lposCommand(client *c) { int direction = LIST_TAIL; long rank = 1, count = -1, maxlen = 0; /* Count -1: option not given. */ + if (sdslen(ele->ptr) > LIST_MAX_ITEM_SIZE) { + addReplyError(c, "Element too large"); + return; + } + /* Parse the optional arguments. */ for (int j = 3; j < c->argc; j++) { char *opt = c->argv[j]->ptr; @@ -610,6 +635,11 @@ void lremCommand(client *c) { long toremove; long removed = 0; + if (sdslen(obj->ptr) > LIST_MAX_ITEM_SIZE) { + addReplyError(c, "Element too large"); + return; + } + if ((getLongFromObjectOrReply(c, c->argv[2], &toremove, NULL) != C_OK)) return; diff --git a/src/t_stream.c b/src/t_stream.c index 43b67e8826ca..30411388697f 100644 --- a/src/t_stream.c +++ b/src/t_stream.c @@ -40,6 +40,12 @@ #define STREAM_ITEM_FLAG_DELETED (1<<0) /* Entry is deleted. Skip it. */ #define STREAM_ITEM_FLAG_SAMEFIELDS (1<<1) /* Same fields as master entry. */ +/* Don't let listpacks grow too big, even if the user config allows it. + * doing so can lead to an overflow (trying to store more than 32bit length + * into the listpack header), or actually an assertion since lpInsert + * will return NULL. */ +#define STREAM_LISTPACK_MAX_SIZE (1<<30) + void streamFreeCG(streamCG *cg); void streamFreeNACK(streamNACK *na); size_t streamReplyWithRangeFromConsumerPEL(client *c, stream *s, streamID *start, streamID *end, size_t count, streamConsumer *consumer); @@ -191,8 +197,11 @@ int streamCompareID(streamID *a, streamID *b) { * * The function returns C_OK if the item was added, this is always true * if the ID was generated by the function. However the function may return - * C_ERR if an ID was given via 'use_id', but adding it failed since the - * current top ID is greater or equal. */ + * C_ERR in several cases: + * 1. If an ID was given via 'use_id', but adding it failed since the + * current top ID is greater or equal. errno will be set to EDOM. + * 2. If a size of a single element or the sum of the elements is too big to + * be stored into the stream. errno will be set to ERANGE. */ int streamAppendItem(stream *s, robj **argv, int64_t numfields, streamID *added_id, streamID *use_id) { /* Generate the new entry ID. */ @@ -206,7 +215,23 @@ int streamAppendItem(stream *s, robj **argv, int64_t numfields, streamID *added_ * or return an error. Automatically generated IDs might * overflow (and wrap-around) when incrementing the sequence part. */ - if (streamCompareID(&id,&s->last_id) <= 0) return C_ERR; + if (streamCompareID(&id,&s->last_id) <= 0) { + errno = EDOM; + return C_ERR; + } + + /* Avoid overflow when trying to add an element to the stream (listpack + * can only host up to 32bit length sttrings, and also a total listpack size + * can't be bigger than 32bit length. */ + size_t totelelen = 0; + for (int64_t i = 0; i < numfields*2; i++) { + sds ele = argv[i]->ptr; + totelelen += sdslen(ele); + } + if (totelelen > STREAM_LISTPACK_MAX_SIZE) { + errno = ERANGE; + return C_ERR; + } /* Add the new entry. */ raxIterator ri; @@ -265,9 +290,10 @@ int streamAppendItem(stream *s, robj **argv, int64_t numfields, streamID *added_ * if we need to switch to the next one. 'lp' will be set to NULL if * the current node is full. */ if (lp != NULL) { - if (server.stream_node_max_bytes && - lp_bytes >= server.stream_node_max_bytes) - { + size_t node_max_bytes = server.stream_node_max_bytes; + if (node_max_bytes == 0 || node_max_bytes > STREAM_LISTPACK_MAX_SIZE) + node_max_bytes = STREAM_LISTPACK_MAX_SIZE; + if (lp_bytes + totelelen >= node_max_bytes) { lp = NULL; } else if (server.stream_node_max_entries) { int64_t count = lpGetInteger(lpFirst(lp)); @@ -1267,11 +1293,13 @@ void xaddCommand(client *c) { /* Append using the low level function and return the ID. */ if (streamAppendItem(s,c->argv+field_pos,(c->argc-field_pos)/2, - &id, id_given ? &id : NULL) - == C_ERR) + &id, id_given ? &id : NULL) == C_ERR) { - addReplyError(c,"The ID specified in XADD is equal or smaller than the " - "target stream top item"); + if (errno == EDOM) + addReplyError(c,"The ID specified in XADD is equal or smaller than " + "the target stream top item"); + else + addReplyError(c,"Elements are too large to be stored"); return; } addReplyStreamID(c,&id); diff --git a/src/t_zset.c b/src/t_zset.c index d0ffe2f8b20a..b44f9551cc33 100644 --- a/src/t_zset.c +++ b/src/t_zset.c @@ -1238,15 +1238,18 @@ void zsetConvert(robj *zobj, int encoding) { } /* Convert the sorted set object into a ziplist if it is not already a ziplist - * and if the number of elements and the maximum element size is within the - * expected ranges. */ -void zsetConvertToZiplistIfNeeded(robj *zobj, size_t maxelelen) { + * and if the number of elements and the maximum element size and total elements size + * are within the expected ranges. */ +void zsetConvertToZiplistIfNeeded(robj *zobj, size_t maxelelen, size_t totelelen) { if (zobj->encoding == OBJ_ENCODING_ZIPLIST) return; zset *zset = zobj->ptr; if (zset->zsl->length <= server.zset_max_ziplist_entries && - maxelelen <= server.zset_max_ziplist_value) - zsetConvert(zobj,OBJ_ENCODING_ZIPLIST); + maxelelen <= server.zset_max_ziplist_value && + ziplistSafeToAdd(NULL, totelelen)) + { + zsetConvert(zobj,OBJ_ENCODING_ZIPLIST); + } } /* Return (by reference) the score of the specified member of the sorted set @@ -1355,20 +1358,28 @@ int zsetAdd(robj *zobj, double score, sds ele, int *flags, double *newscore) { } return 1; } else if (!xx) { - /* Optimize: check if the element is too large or the list + /* check if the element is too large or the list * becomes too long *before* executing zzlInsert. */ - zobj->ptr = zzlInsert(zobj->ptr,ele,score); - if (zzlLength(zobj->ptr) > server.zset_max_ziplist_entries || - sdslen(ele) > server.zset_max_ziplist_value) + if (zzlLength(zobj->ptr)+1 > server.zset_max_ziplist_entries || + sdslen(ele) > server.zset_max_ziplist_value || + !ziplistSafeToAdd(zobj->ptr, sdslen(ele))) + { zsetConvert(zobj,OBJ_ENCODING_SKIPLIST); - if (newscore) *newscore = score; - *flags |= ZADD_ADDED; - return 1; + } else { + zobj->ptr = zzlInsert(zobj->ptr,ele,score); + if (newscore) *newscore = score; + *flags |= ZADD_ADDED; + return 1; + } } else { *flags |= ZADD_NOP; return 1; } - } else if (zobj->encoding == OBJ_ENCODING_SKIPLIST) { + } + + /* Note that the above block handling ziplist would have either returned or + * converted the key to skiplist. */ + if (zobj->encoding == OBJ_ENCODING_SKIPLIST) { zset *zs = zobj->ptr; zskiplistNode *znode; dictEntry *de; @@ -2180,7 +2191,7 @@ void zunionInterGenericCommand(client *c, robj *dstkey, int op) { zsetopsrc *src; zsetopval zval; sds tmp; - size_t maxelelen = 0; + size_t maxelelen = 0, totelelen = 0; robj *dstobj; zset *dstzset; zskiplistNode *znode; @@ -2304,6 +2315,7 @@ void zunionInterGenericCommand(client *c, robj *dstkey, int op) { tmp = zuiNewSdsFromValue(&zval); znode = zslInsert(dstzset->zsl,score,tmp); dictAdd(dstzset->dict,tmp,&znode->score); + totelelen += sdslen(tmp); if (sdslen(tmp) > maxelelen) maxelelen = sdslen(tmp); } } @@ -2340,6 +2352,7 @@ void zunionInterGenericCommand(client *c, robj *dstkey, int op) { /* Remember the longest single element encountered, * to understand if it's possible to convert to ziplist * at the end. */ + totelelen += sdslen(tmp); if (sdslen(tmp) > maxelelen) maxelelen = sdslen(tmp); /* Update the element with its initial score. */ dictSetKey(accumulator, de, tmp); @@ -2380,7 +2393,7 @@ void zunionInterGenericCommand(client *c, robj *dstkey, int op) { if (dbDelete(c->db,dstkey)) touched = 1; if (dstzset->zsl->length) { - zsetConvertToZiplistIfNeeded(dstobj,maxelelen); + zsetConvertToZiplistIfNeeded(dstobj,maxelelen,totelelen); dbAdd(c->db,dstkey,dstobj); addReplyLongLong(c,zsetLength(dstobj)); signalModifiedKey(c,c->db,dstkey); diff --git a/src/ziplist.c b/src/ziplist.c index 5933d19151b0..582eed2c9b4a 100644 --- a/src/ziplist.c +++ b/src/ziplist.c @@ -265,6 +265,17 @@ ZIPLIST_LENGTH(zl) = intrev16ifbe(intrev16ifbe(ZIPLIST_LENGTH(zl))+incr); \ } +/* Don't let ziplists grow over 1GB in any case, don't wanna risk overflow in + * zlbytes*/ +#define ZIPLIST_MAX_SAFETY_SIZE (1<<30) +int ziplistSafeToAdd(unsigned char* zl, size_t add) { + size_t len = zl? ziplistBlobLen(zl): 0; + if (len + add > ZIPLIST_MAX_SAFETY_SIZE) + return 0; + return 1; +} + + /* We use this function to receive information about a ziplist entry. * Note that this is not how the data is actually encoded, is just what we * get filled by a function in order to operate more easily. */ @@ -586,7 +597,8 @@ unsigned char *ziplistNew(void) { } /* Resize the ziplist. */ -unsigned char *ziplistResize(unsigned char *zl, unsigned int len) { +unsigned char *ziplistResize(unsigned char *zl, size_t len) { + assert(len < UINT32_MAX); zl = zrealloc(zl,len); ZIPLIST_BYTES(zl) = intrev32ifbe(len); zl[len-1] = ZIP_END; @@ -898,6 +910,9 @@ unsigned char *ziplistMerge(unsigned char **first, unsigned char **second) { /* Combined zl length should be limited within UINT16_MAX */ zllength = zllength < UINT16_MAX ? zllength : UINT16_MAX; + /* larger values can't be stored into ZIPLIST_BYTES */ + assert(zlbytes < UINT32_MAX); + /* Save offset positions before we start ripping memory apart. */ size_t first_offset = intrev32ifbe(ZIPLIST_TAIL_OFFSET(*first)); size_t second_offset = intrev32ifbe(ZIPLIST_TAIL_OFFSET(*second)); diff --git a/src/ziplist.h b/src/ziplist.h index 964a47f6dc29..f6ba6c8be47d 100644 --- a/src/ziplist.h +++ b/src/ziplist.h @@ -49,6 +49,7 @@ unsigned char *ziplistFind(unsigned char *p, unsigned char *vstr, unsigned int v unsigned int ziplistLen(unsigned char *zl); size_t ziplistBlobLen(unsigned char *zl); void ziplistRepr(unsigned char *zl); +int ziplistSafeToAdd(unsigned char* zl, size_t add); #ifdef REDIS_TEST int ziplistTest(int argc, char *argv[]); diff --git a/tests/support/util.tcl b/tests/support/util.tcl index 970d63314fd6..343912ac0049 100644 --- a/tests/support/util.tcl +++ b/tests/support/util.tcl @@ -109,7 +109,23 @@ proc wait_done_loading r { # count current log lines in server's stdout proc count_log_lines {srv_idx} { - set _ [exec wc -l < [srv $srv_idx stdout]] + set _ [string trim [exec wc -l < [srv $srv_idx stdout]]] +} + +# returns the number of times a line with that pattern appears in a file +proc count_message_lines {file pattern} { + set res 0 + # exec fails when grep exists with status other than 0 (when the patter wasn't found) + catch { + set res [string trim [exec grep $pattern $file 2> /dev/null | wc -l]] + } + return $res +} + +# returns the number of times a line with that pattern appears in the log +proc count_log_message {srv_idx pattern} { + set stdout [srv $srv_idx stdout] + return [count_message_lines $stdout $pattern] } # verify pattern exists in server's sdtout after a certain line number diff --git a/tests/unit/violations.tcl b/tests/unit/violations.tcl new file mode 100644 index 000000000000..d87b9236528e --- /dev/null +++ b/tests/unit/violations.tcl @@ -0,0 +1,156 @@ +# These tests consume massive amounts of memory, and are not +# suitable to be executed as part of the normal test suite +set ::str500 [string repeat x 500000000] ;# 500mb + +# Utility function to write big argument into redis client connection +proc write_big_bulk {size} { + r write "\$$size\r\n" + while {$size >= 500000000} { + r write $::str500 + incr size -500000000 + } + if {$size > 0} { + r write [string repeat x $size] + } + r write "\r\n" +} + +# One XADD with one huge 5GB field +# Expected to fail resulting in an empty stream +start_server [list overrides [list save ""] ] { + test {XADD one huge field} { + r config set proto-max-bulk-len 10000000000 ;#10gb + r config set client-query-buffer-limit 10000000000 ;#10gb + r write "*5\r\n\$4\r\nXADD\r\n\$2\r\nS1\r\n\$1\r\n*\r\n" + r write "\$1\r\nA\r\n" + write_big_bulk 5000000000 ;#5gb + r flush + catch {r read} err + assert_match {*too large*} $err + r xlen S1 + } {0} +} + +# One XADD with one huge (exactly nearly) 4GB field +# This uncovers the overflow in lpEncodeGetType +# Expected to fail resulting in an empty stream +start_server [list overrides [list save ""] ] { + test {XADD one huge field - 1} { + r config set proto-max-bulk-len 10000000000 ;#10gb + r config set client-query-buffer-limit 10000000000 ;#10gb + r write "*5\r\n\$4\r\nXADD\r\n\$2\r\nS1\r\n\$1\r\n*\r\n" + r write "\$1\r\nA\r\n" + write_big_bulk 4294967295 ;#4gb-1 + r flush + catch {r read} err + assert_match {*too large*} $err + r xlen S1 + } {0} +} + +# Gradually add big stream fields using repeated XADD calls +start_server [list overrides [list save ""] ] { + test {several XADD big fields} { + r config set stream-node-max-bytes 0 + for {set j 0} {$j<10} {incr j} { + r xadd stream * 1 $::str500 2 $::str500 + } + r ping + r xlen stream + } {10} +} + +# Add over 4GB to a single stream listpack (one XADD command) +# Expected to fail resulting in an empty stream +start_server [list overrides [list save ""] ] { + test {single XADD big fields} { + r write "*23\r\n\$4\r\nXADD\r\n\$1\r\nS\r\n\$1\r\n*\r\n" + for {set j 0} {$j<10} {incr j} { + r write "\$1\r\n$j\r\n" + write_big_bulk 500000000 ;#500mb + } + r flush + catch {r read} err + assert_match {*too large*} $err + r xlen S + } {0} +} + +# Gradually add big hash fields using repeated HSET calls +# This reproduces the overflow in the call to ziplistResize +# Object will be converted to hashtable encoding +start_server [list overrides [list save ""] ] { + r config set hash-max-ziplist-value 1000000000 ;#1gb + test {hash with many big fields} { + for {set j 0} {$j<10} {incr j} { + r hset h $j $::str500 + } + r object encoding h + } {hashtable} +} + +# Add over 4GB to a single hash field (one HSET command) +# Object will be converted to hashtable encoding +start_server [list overrides [list save ""] ] { + test {hash with one huge field} { + catch {r config set hash-max-ziplist-value 10000000000} ;#10gb + r config set proto-max-bulk-len 10000000000 ;#10gb + r config set client-query-buffer-limit 10000000000 ;#10gb + r write "*4\r\n\$4\r\nHSET\r\n\$2\r\nH1\r\n" + r write "\$1\r\nA\r\n" + write_big_bulk 5000000000 ;#5gb + r flush + r read + r object encoding H1 + } {hashtable} +} + +# Add over 4GB to a single list member (one LPUSH command) +# Currently unsupported, and expected to fail rather than being truncated +# Expected to fail resulting in a non-existing list +start_server [list overrides [list save ""] ] { + test {list with one huge field} { + r config set proto-max-bulk-len 10000000000 ;#10gb + r config set client-query-buffer-limit 10000000000 ;#10gb + r write "*3\r\n\$5\r\nLPUSH\r\n\$2\r\nL1\r\n" + write_big_bulk 5000000000 ;#5gb + r flush + catch {r read} err + assert_match {*too large*} $err + r exists L1 + } {0} +} + +# SORT which attempts to store an element larger than 4GB into a list. +# Currently unsupported and results in an assertion instead of truncation +start_server [list overrides [list save ""] ] { + test {SORT adds huge field to list} { + r config set proto-max-bulk-len 10000000000 ;#10gb + r config set client-query-buffer-limit 10000000000 ;#10gb + r write "*3\r\n\$3\r\nSET\r\n\$2\r\nS1\r\n" + write_big_bulk 5000000000 ;#5gb + r flush + r read + assert_equal [r strlen S1] 5000000000 + r set S2 asdf + r sadd myset 1 2 + r mset D1 1 D2 2 + catch {r sort myset by D* get S* store mylist} + # assert_equal [count_log_message 0 "crashed by signal"] 0 - not suitable for 6.0 + assert_equal [count_log_message 0 "ASSERTION FAILED"] 1 + } +} + +# SORT which stores an integer encoded element into a list. +# Just for coverage, no news here. +start_server [list overrides [list save ""] ] { + test {SORT adds integer field to list} { + r set S1 asdf + r set S2 123 ;# integer encoded + assert_encoding "int" S2 + r sadd myset 1 2 + r mset D1 1 D2 2 + r sort myset by D* get S* store mylist + r llen mylist + } {2} +}
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