diff options
| author | Eric Biggers <ebiggers@google.com> | 2017-09-18 11:36:45 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-05 09:35:51 +0200 |
| commit | 50f17a4b9141111a50d9eb127389fa69b2085d7c (patch) | |
| tree | bac9bdf398e5249f09c09e2f9e611863b10cb21e /net/lapb/lapb_timer.c | |
| parent | 2d9db72fb50e72aafaac2b99f4fcf1013497d8da (diff) | |
KEYS: fix writing past end of user-supplied buffer in keyring_read()
commit e645016abc803dafc75e4b8f6e4118f088900ffb upstream.
Userspace can call keyctl_read() on a keyring to get the list of IDs of
keys in the keyring. But if the user-supplied buffer is too small, the
kernel would write the full list anyway --- which will corrupt whatever
userspace memory happened to be past the end of the buffer. Fix it by
only filling the space that is available.
Fixes: b2a4df200d57 ("KEYS: Expand the capacity of a keyring")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/lapb/lapb_timer.c')
0 files changed, 0 insertions, 0 deletions