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Prevent danger of accessing freed memory (theoretical but unlikely

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bug).
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Bill Medland 2001-11-06 22:25:11 +00:00 committed by Alexandre Julliard
parent c9b0237513
commit 9e5af61ed5
1 changed files with 6 additions and 1 deletions
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7
server/select.c
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@ -58,7 +58,11 @@ int add_select_user( struct object *obj )
if (!(newusers = realloc( poll_users, new_count * sizeof(*poll_users) ))) return -1; if (!(newusers = realloc( poll_users, new_count * sizeof(*poll_users) ))) return -1;
if (!(newpoll = realloc( pollfd, new_count * sizeof(*pollfd) ))) if (!(newpoll = realloc( pollfd, new_count * sizeof(*pollfd) )))
{ {
free( newusers ); if (allocated_users)
poll_users = newusers;
else
free( newusers );
obj->select = -1;
return -1; return -1;
} }
poll_users = newusers; poll_users = newusers;
@ -80,6 +84,7 @@ int add_select_user( struct object *obj )
void remove_select_user( struct object *obj ) void remove_select_user( struct object *obj )
{ {
int user = obj->select; int user = obj->select;
assert( user >= 0 );
assert( poll_users[user] == obj ); assert( poll_users[user] == obj );
pollfd[user].fd = -1; pollfd[user].fd = -1;
pollfd[user].events = 0; pollfd[user].events = 0;