From: Eric Biggers ebiggers@google.com

With pipe-user-pages-hard set to 'N', users were actually only allowed up to 'N - 1' buffers; and likewise for pipe-user-pages-soft.

Fix this to allow up to 'N' buffers, as would be expected.

Fixes: b0b91d18e2e9 ("pipe: fix limit checking in pipe_set_size()") Cc: stable@vger.kernel.org Acked-by: Willy Tarreau w@1wt.eu Signed-off-by: Eric Biggers ebiggers@google.com --- fs/pipe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/pipe.c b/fs/pipe.c index 847ecc388820..9f20e7128578 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -605,12 +605,12 @@ static unsigned long account_pipe_buffers(struct user_struct *user,

static bool too_many_pipe_buffers_soft(unsigned long user_bufs) { - return pipe_user_pages_soft && user_bufs >= pipe_user_pages_soft; + return pipe_user_pages_soft && user_bufs > pipe_user_pages_soft; }

static bool too_many_pipe_buffers_hard(unsigned long user_bufs) { - return pipe_user_pages_hard && user_bufs >= pipe_user_pages_hard; + return pipe_user_pages_hard && user_bufs > pipe_user_pages_hard; }

static bool is_unprivileged_user(void)