diff options
author | Matthew Wilcox <willy@infradead.org> | 2019-04-05 14:02:10 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-04 09:15:18 +0200 |
commit | c88a0aa7ace7eb10dca42be59f21e2cbd263575e (patch) | |
tree | 4f8e9d7d8c6065bbd9c84ff26ed3fab3a0b64853 /usr | |
parent | 04198de24771f6aaf6374979db64403101d809df (diff) |
fs: prevent page refcount overflow in pipe_buf_get
commit 15fab63e1e57be9fdb5eec1bbc5916e9825e9acb upstream.
Change pipe_buf_get() to return a bool indicating whether it succeeded
in raising the refcount of the page (if the thing in the pipe is a page).
This removes another mechanism for overflowing the page refcount. All
callers converted to handle a failure.
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions