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| author | Mathias Krause <minipli@googlemail.com> | 2017-08-26 17:09:00 +0200 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2017-08-28 10:58:02 +0200 |
| commit | 931e79d7a7ddee4709c56b39de169a36804589a1 (patch) | |
| tree | e20cdb0427b15340a19bae03b341615b4095b09d /net/xfrm/xfrm_user.c | |
| parent | xfrm_user: fix info leak in build_expire() (diff) | |
| download | linux-931e79d7a7ddee4709c56b39de169a36804589a1.tar.xz linux-931e79d7a7ddee4709c56b39de169a36804589a1.zip | |
xfrm_user: fix info leak in build_aevent()
The memory reserved to dump the ID of the xfrm state includes a padding
byte in struct xfrm_usersa_id added by the compiler for alignment. To
prevent the heap info leak, memset(0) the sa_id before filling it.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Fixes: d51d081d6504 ("[IPSEC]: Sync series - user")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/xfrm/xfrm_user.c')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 2cbdc81610c6..9391ced05259 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1869,6 +1869,7 @@ static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct return -EMSGSIZE; id = nlmsg_data(nlh); + memset(&id->sa_id, 0, sizeof(id->sa_id)); memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); id->sa_id.spi = x->id.spi; id->sa_id.family = x->props.family; |