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util: refuse to set too large value for socket buffer size

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This commit is contained in:
Yu Watanabe 2020-09-09 00:07:50 +09:00
parent 8c63924c8d
commit 1263c85ef3
1 changed files with 6 additions and 0 deletions
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6
src/basic/socket-util.c
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@ -621,6 +621,9 @@ int fd_inc_sndbuf(int fd, size_t n) {
int r, value;
socklen_t l = sizeof(value);
if (n > INT_MAX)
return -ERANGE;
r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l);
if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
return 0;
@ -640,6 +643,9 @@ int fd_inc_rcvbuf(int fd, size_t n) {
int r, value;
socklen_t l = sizeof(value);
if (n > INT_MAX)
return -ERANGE;
r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l);
if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
return 0;