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Merge branch 'lwip/dns_stack_corruption_fix' into 'master'

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fix(dns): Added addr_cnt to DNS resolution to fix multi-IP buffer overflow

See merge request espressif/esp-idf!48700
This commit is contained in:
David Čermák
2026-06-02 13:38:30 +08:00
parent 61869bc6e5 75f2ff7e0c
commit 446dae6e6f
2 changed files with 5 additions and 1 deletions
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4
components/lwip/Kconfig
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@@ -1204,9 +1204,13 @@ menu "LWIP"
config LWIP_DNS_MAX_HOST_IP
int "Maximum number of IP addresses per host"
range 1 8
default 1
help
Maximum number of IP addresses that can be returned by DNS queries for a single host.
Allowed values are 1--8. In lwIP this is ``DNS_MAX_HOST_IP``. Multi-IP DNS APIs
require the caller's ``addr_cnt`` argument to satisfy 0 < addr_cnt <= DNS_MAX_HOST_IP;
otherwise they return ``ERR_ARG``.
config LWIP_DNS_MAX_SERVERS
int "Maximum number of DNS servers"

2
components/lwip/lwip

Submodule components/lwip/lwip updated: 20f8b0739c...6233a15612