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Fix memory leak with CLIENT LIST/KILL duplicate filters #2362

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Merged
merged 8 commits into from
Oct 8, 2025
Merged

Fix memory leak with CLIENT LIST/KILL duplicate filters #2362

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932a690
Handle duplicate filters with LWW in client list/kill
hpatro Aug 8, 2025
c770c87
Remove no longer necessary refactoring
hpatro Oct 2, 2025
a5b17e7
Add tests
hpatro Oct 2, 2025
d00f4eb
Align behavior of ID/NOT-ID filter with others
hpatro Oct 2, 2025
4c3b68c
Refactor
hpatro Oct 6, 2025
92cd78b
Revert breaking changes for ID and algin NOT-ID behavior with ID
hpatro Oct 7, 2025
d42318e
Update ID filter tests
hpatro Oct 8, 2025
a7ba7c0
fix format
hpatro Oct 8, 2025
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41 changes: 41 additions & 0 deletions src/networking.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4577,13 +4577,21 @@ static int parseClientFiltersOrReply(client *c, int index, clientFilter *filter)
filter->idle = idle_time;
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "flags") && moreargs) {
if (filter->flags) {
sdsfree(filter->flags);
filter->flags = NULL;
}
filter->flags = sdsnew(c->argv[index + 1]->ptr);
if (validateClientFlagFilter(filter->flags) == C_ERR) {
addReplyErrorFormat(c, "Unknown flags found in the provided filter: %s", filter->flags);
return C_ERR;
}
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "not-flags") && moreargs) {
if (filter->not_flags) {
sdsfree(filter->not_flags);
filter->not_flags = NULL;
}
filter->not_flags = sdsnew(c->argv[index + 1]->ptr);
if (validateClientFlagFilter(filter->not_flags) == C_ERR) {
addReplyErrorFormat(c, "Unknown flags found in the NOT-FLAGS filter: %s", filter->not_flags);
Expand All @@ -4597,18 +4605,34 @@ static int parseClientFiltersOrReply(client *c, int index, clientFilter *filter)
filter->not_name = c->argv[index + 1]->ptr;
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "lib-name") && moreargs) {
if (filter->lib_name) {
decrRefCount(filter->lib_name);
filter->lib_name = NULL;
}
filter->lib_name = c->argv[index + 1];
incrRefCount(filter->lib_name);
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "not-lib-name") && moreargs) {
if (filter->not_lib_name) {
decrRefCount(filter->not_lib_name);
filter->not_lib_name = NULL;
}
filter->not_lib_name = c->argv[index + 1];
incrRefCount(filter->not_lib_name);
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "lib-ver") && moreargs) {
if (filter->lib_ver) {
decrRefCount(filter->lib_ver);
filter->lib_ver = NULL;
}
filter->lib_ver = c->argv[index + 1];
incrRefCount(filter->lib_ver);
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "not-lib-ver") && moreargs) {
if (filter->not_lib_ver) {
decrRefCount(filter->not_lib_ver);
filter->not_lib_ver = NULL;
}
filter->not_lib_ver = c->argv[index + 1];
incrRefCount(filter->not_lib_ver);
index += 2;
Expand All @@ -4635,23 +4659,39 @@ static int parseClientFiltersOrReply(client *c, int index, clientFilter *filter)
filter->not_db_number = not_db_id;
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "capa") && moreargs) {
if (filter->capa) {
sdsfree(filter->capa);
filter->capa = NULL;
}
filter->capa = sdsnew(c->argv[index + 1]->ptr);
if (validateClientCapaFilter(filter->capa) == C_ERR) {
addReplyErrorFormat(c, "Unknown capa found in the provided filter: %s", filter->capa);
return C_ERR;
}
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "not-capa") && moreargs) {
if (filter->not_capa) {
sdsfree(filter->not_capa);
filter->not_capa = NULL;
}
filter->not_capa = sdsnew(c->argv[index + 1]->ptr);
if (validateClientCapaFilter(filter->not_capa) == C_ERR) {
addReplyErrorFormat(c, "Unknown capa found in the NOT-CAPA filter: %s", filter->not_capa);
return C_ERR;
}
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "ip") && moreargs) {
if (filter->ip) {
sdsfree(filter->ip);
filter->ip = NULL;
}
filter->ip = sdsnew(c->argv[index + 1]->ptr);
index += 2;
} else if (!strcasecmp(c->argv[index]->ptr, "not-ip") && moreargs) {
if (filter->not_ip) {
sdsfree(filter->not_ip);
filter->not_ip = NULL;
}
filter->not_ip = sdsnew(c->argv[index + 1]->ptr);
index += 2;
} else {
Expand Down Expand Up @@ -5016,6 +5056,7 @@ void clientListCommand(client *c) {
filter.not_type = -1;
filter.db_number = -1;
filter.not_db_number = -1;

int i = 2;

if (parseClientFiltersOrReply(c, i, &filter) != C_OK) {
Expand Down
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