mirror/lwip
1
0
Fork 0
mirror of https://github.com/lwip-tcpip/lwip.git synced 2024-10-01 04:12:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

api,sockets: Fix signed overflow check

Browse Source 
Signed overflow is undefined behaviour in C/C++.
This commit is contained in:
Mingjie Shen 2023-04-14 16:37:50 -04:00 committed by Simon Goldschmidt
parent e3a20b3bc2
commit 2e3dcf06d1
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/api/sockets.c
View File

@ -1012,7 +1012,7 @@ lwip_recv_tcp(struct lwip_sock *sock, void *mem, size_t len, int flags)
} else {
copylen = (u16_t)recv_left;
}
if (recvd + copylen < recvd) {
if (recvd > SSIZE_MAX - copylen) {
/* overflow */
copylen = (u16_t)(SSIZE_MAX - recvd);
}