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pipe: F_SETPIPE_SZ should return -EPERM for non-root 

If the passed in size is larger than what has been set as the
system wide limit and the user is not root, we want to return
permission denied (not invalid value).

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2010-05-24 19:15:57 +02:00
parent e36f724b4a
commit 0191f8697b
1 changed files with 1 additions and 1 deletions
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2
fs/pipe.c
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@ -1170,7 +1170,7 @@ long pipe_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
switch (cmd) { switch (cmd) {
case F_SETPIPE_SZ: case F_SETPIPE_SZ:
if (!capable(CAP_SYS_ADMIN) && arg > pipe_max_pages) if (!capable(CAP_SYS_ADMIN) && arg > pipe_max_pages)
return -EINVAL; return -EPERM;
/* /*
* The pipe needs to be at least 2 pages large to * The pipe needs to be at least 2 pages large to
* guarantee POSIX behaviour. * guarantee POSIX behaviour.