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api,sockets: Fix signed overflow check

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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
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2
src/api/sockets.c
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@ -1012,7 +1012,7 @@ lwip_recv_tcp(struct lwip_sock *sock, void *mem, size_t len, int flags)
} else { } else {
copylen = (u16_t)recv_left; copylen = (u16_t)recv_left;
} }
if (recvd + copylen < recvd) { if (recvd > SSIZE_MAX - copylen) {
/* overflow */ /* overflow */
copylen = (u16_t)(SSIZE_MAX - recvd); copylen = (u16_t)(SSIZE_MAX - recvd);
} }