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Sanity check fd before using it as an array index.

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Noticed by:	ted@NLnetLabs.nl (Ted Lindgreen)
Approved by:	ru
This commit is contained in:
Alexander Leidinger 2003-06-09 16:45:37 +00:00
parent dff6f51034
commit f970961773
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=116092
1 changed files with 2 additions and 1 deletions
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3
lib/libc_r/uthread/uthread_close.c
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@ -49,7 +49,8 @@ _close(int fd)
struct stat sb;
struct fd_table_entry *entry;
if ((fd == _thread_kern_pipe[0]) || (fd == _thread_kern_pipe[1]) ||
if ((fd < 0) || (fd >= _thread_dtablesize) ||
(fd == _thread_kern_pipe[0]) || (fd == _thread_kern_pipe[1]) ||
(_thread_fd_table[fd] == NULL)) {
/*
* Don't allow silly programs to close the kernel pipe