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lwip_select: check for correct 'maxfdp1' parameter range

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goldsimon 2017-02-24 19:50:14 +01:00
parent 3107d4a0fa
commit d73e225519
1 changed files with 5 additions and 0 deletions
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5
src/api/sockets.c
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@ -1381,6 +1381,11 @@ lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset,
timeout ? (s32_t)timeout->tv_sec : (s32_t)-1,
timeout ? (s32_t)timeout->tv_usec : (s32_t)-1));
if ((maxfdp1 < 0) || (maxfdp1 > (FD_SETSIZE + LWIP_SOCKET_OFFSET))) {
set_errno(EINVAL);
return -1;
}
/* Go through each socket in each list to count number of sockets which
currently match */
nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset);