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Problem: inside the event array, epoll return an event with invalid data pointer which create a segmentation fault

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Tests to prevent segmentation fault due to null pointer are added.
This commit is contained in:
patrick-volante 2021-12-03 11:58:20 +01:00
parent 1d3633742a
commit 2c415b6f68
1 changed files with 4 additions and 0 deletions
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4
src/epoll.cpp
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@ -192,6 +192,10 @@ void zmq::epoll_t::loop ()
const poll_entry_t *const pe = const poll_entry_t *const pe =
static_cast<const poll_entry_t *> (ev_buf[i].data.ptr); static_cast<const poll_entry_t *> (ev_buf[i].data.ptr);
if (NULL == pe)
continue;
if (NULL == pe->events)
continue;
if (pe->fd == retired_fd) if (pe->fd == retired_fd)
continue; continue;
if (ev_buf[i].events & (EPOLLERR | EPOLLHUP)) if (ev_buf[i].events & (EPOLLERR | EPOLLHUP))