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Subject: [PATCH] Fixes occasional segfault in lws_chage_pollfd

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* so it happens that sometimes lws_change_pollfd is called with
  bad or incomplete data structures, mainly the context pointer
  obtained from wsi->protocol is null or wsi->position_in_fds_table
  is -1; checks have been added to avoid this condition
This commit is contained in:
Octav Zlatior 2014-12-12 17:33:27 +01:00 • committed by Andy Green
parent f48ddd2a55
commit d4dd69a254
1 changed files with 4 additions and 0 deletions
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4
lib/pollfd.c
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@ -131,7 +131,11 @@ do_ext:
int
lws_change_pollfd(struct libwebsocket *wsi, int _and, int _or)
{
if (!wsi || !wsi->protocol || wsi->position_in_fds_table < 0)
return 1;
struct libwebsocket_context *context = wsi->protocol->owning_server;
if (!context)
return 1;
int tid;
int sampled_tid;
struct libwebsocket_pollfd *pfd;