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Fix #919, check index inside fdset conversions #920

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merged 1 commit into from
Mar 22, 2021
Merged

Fix #919, check index inside fdset conversions #920

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8 changes: 4 additions & 4 deletions src/os/portable/os-impl-bsd-select.c
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Original file line number Diff line number Diff line change
Expand Up @@ -88,9 +88,9 @@ static int OS_FdSet_ConvertIn_Impl(fd_set *os_set, OS_FdSet *OSAL_set)
bit = 0;
while (objids != 0)
{
if (objids & 0x01)
id = OSAL_INDEX_C((offset * 8) + bit);
if ((objids & 0x01) != 0 && id < OS_MAX_NUM_OPEN_FILES)
{
id = OSAL_INDEX_C((offset * 8) + bit);
osfd = OS_impl_filehandle_table[id].fd;
if (osfd >= 0 && OS_impl_filehandle_table[id].selectable)
{
Expand Down Expand Up @@ -134,9 +134,9 @@ static void OS_FdSet_ConvertOut_Impl(fd_set *output, OS_FdSet *Input)
bit = 0;
while (objids != 0)
{
if (objids & 0x01)
id = OSAL_INDEX_C((offset * 8) + bit);
if ((objids & 0x01) != 0 && id < OS_MAX_NUM_OPEN_FILES)
{
id = OSAL_INDEX_C((offset * 8) + bit);
osfd = OS_impl_filehandle_table[id].fd;
if (osfd < 0 || !FD_ISSET(osfd, output))
{
Expand Down