diff options
| author | Eric Dumazet <edumazet@google.com> | 2016-12-02 09:44:53 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-12-10 19:07:24 +0100 |
| commit | 77125815f058d587cac9217ac2c468038a7285c4 (patch) | |
| tree | e907ccf617a5f76cf17195e0b195da3264d38b8b /net/ipv4 | |
| parent | 6e682c528b3ef046a03994b076d832b2ac029042 (diff) | |
net: avoid signed overflows for SO_{SND|RCV}BUFFORCE
[ Upstream commit b98b0bc8c431e3ceb4b26b0dfc8db509518fb290 ]
CAP_NET_ADMIN users should not be allowed to set negative
sk_sndbuf or sk_rcvbuf values, as it can lead to various memory
corruptions, crashes, OOM...
Note that before commit 82981930125a ("net: cleanups in
sock_setsockopt()"), the bug was even more serious, since SO_SNDBUF
and SO_RCVBUF were vulnerable.
This needs to be backported to all known linux kernels.
Again, many thanks to syzkaller team for discovering this gem.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4')
0 files changed, 0 insertions, 0 deletions