Package: liblwip0 Version: 2.1.2-5.1 Severity: important Dear Maintainer,
Creating TCP server with existing value in library crashed by bad memory using. Valgrind found the problem in low_level_input function, which uses pbuf_alloc, that allocate too less memory. This "original" value will work. -- System Information: Debian Release: bullseye/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 5.2.0-3-amd64 (SMP w/12 CPU cores) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=cs_CZ.UTF-8, LC_CTYPE=cs_CZ.UTF-8 (charmap=UTF-8), LANGUAGE=cs_CZ.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages liblwip0 depends on: ii libc6 2.29-3 liblwip0 recommends no packages. liblwip0 suggests no packages. -- no debconf information
--- lwip-2.1.2.orig/port/include/lwipopts.h +++ lwip-2.1.2/port/include/lwipopts.h @@ -69,7 +69,7 @@ #define LWIP_IPV6_NUM_ADDRESSES 6 /* TCP tuning */ -#define TCP_MSS 1460 +#define TCP_MSS 536 #define TCP_WND 0xFFFF #define LWIP_WND_SCALE 1 #define TCP_RCV_SCALE 0x1
