diff options
| author | Eric Biggers <ebiggers@google.com> | 2017-09-18 11:38:29 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-23 08:44:29 +0100 |
| commit | 52f6c8da89b93b98a1dfc5008018012dc3ffd508 (patch) | |
| tree | 6dca33dc9a5e3fbcbd4323cb59319e07845af0ac /net/ipv4/tcp_input.c | |
| parent | b71ec041cce35620b2e31cb94c756d73afb494f6 (diff) | |
KEYS: restrict /proc/keys by credentials at open time
commit 4aa68e07d845562561f5e73c04aa521376e95252 upstream.
When checking for permission to view keys whilst reading from
/proc/keys, we should use the credentials with which the /proc/keys file
was opened. This is because, in a classic type of exploit, it can be
possible to bypass checks for the *current* credentials by passing the
file descriptor to a suid program.
Following commit 34dbbcdbf633 ("Make file credentials available to the
seqfile interfaces") we can finally fix it. So let's do it.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Zubin Mithra <zsm@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/tcp_input.c')
0 files changed, 0 insertions, 0 deletions