From: paul.moore@hp.com
To: netdev@vger.kernel.org, selinux@tycho.nsa.gov
Cc: Paul Moore <paul.moore@hp.com>
Subject: [PATCH 1/2] NetLabel: perform input validation earlier on CIPSOv4 DOI add ops
Date: Fri, 15 Dec 2006 16:49:27 -0500 [thread overview]
Message-ID: <20061215215229.014743000@hp.com> (raw)
In-Reply-To: 20061215214926.018950000@hp.com
From: Paul Moore <paul.moore@hp.com>
There are a couple of cases where the user input for a CIPSOv4 DOI add
operation was not being done soon enough; the result was unexpected behavior
which was resulting in oops/panics/lockups on some platforms. This patch moves
the existing input validation code earlier in the code path to protect against
bogus user input.
Signed-off-by: Paul Moore <paul.moore@hp.com>
---
net/netlabel/netlabel_cipso_v4.c | 28 +++++++++++++++++-----------
1 files changed, 17 insertions(+), 11 deletions(-)
Index: net-2.6.20_bugfix/net/netlabel/netlabel_cipso_v4.c
===================================================================
--- net-2.6.20_bugfix.orig/net/netlabel/netlabel_cipso_v4.c
+++ net-2.6.20_bugfix/net/netlabel/netlabel_cipso_v4.c
@@ -185,20 +185,31 @@ static int netlbl_cipsov4_add_std(struct
ret_val = netlbl_cipsov4_add_common(info, doi_def);
if (ret_val != 0)
goto add_std_failure;
+ ret_val = -EINVAL;
nla_for_each_nested(nla_a,
info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
nla_a_rem)
if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
nla_for_each_nested(nla_b, nla_a, nla_b_rem)
switch (nla_b->nla_type) {
case NLBL_CIPSOV4_A_MLSLVLLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_LVLS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->lvl.local_size)
doi_def->map.std->lvl.local_size =
nla_get_u32(nla_b) + 1;
break;
case NLBL_CIPSOV4_A_MLSLVLREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_LVLS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->lvl.cipso_size)
doi_def->map.std->lvl.cipso_size =
@@ -206,9 +217,6 @@ static int netlbl_cipsov4_add_std(struct
break;
}
}
- if (doi_def->map.std->lvl.local_size > CIPSO_V4_MAX_LOC_LVLS ||
- doi_def->map.std->lvl.cipso_size > CIPSO_V4_MAX_REM_LVLS)
- goto add_std_failure;
doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
sizeof(u32),
GFP_KERNEL);
@@ -230,11 +238,6 @@ static int netlbl_cipsov4_add_std(struct
struct nlattr *lvl_loc;
struct nlattr *lvl_rem;
- if (nla_validate_nested(nla_a,
- NLBL_CIPSOV4_A_MAX,
- netlbl_cipsov4_genl_policy) != 0)
- goto add_std_failure;
-
lvl_loc = nla_find_nested(nla_a,
NLBL_CIPSOV4_A_MLSLVLLOC);
lvl_rem = nla_find_nested(nla_a,
@@ -264,12 +267,18 @@ static int netlbl_cipsov4_add_std(struct
nla_for_each_nested(nla_b, nla_a, nla_b_rem)
switch (nla_b->nla_type) {
case NLBL_CIPSOV4_A_MLSCATLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_CATS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->cat.local_size)
doi_def->map.std->cat.local_size =
nla_get_u32(nla_b) + 1;
break;
case NLBL_CIPSOV4_A_MLSCATREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_CATS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->cat.cipso_size)
doi_def->map.std->cat.cipso_size =
@@ -277,9 +286,6 @@ static int netlbl_cipsov4_add_std(struct
break;
}
}
- if (doi_def->map.std->cat.local_size > CIPSO_V4_MAX_LOC_CATS ||
- doi_def->map.std->cat.cipso_size > CIPSO_V4_MAX_REM_CATS)
- goto add_std_failure;
doi_def->map.std->cat.local = kcalloc(
doi_def->map.std->cat.local_size,
sizeof(u32),
--
paul moore
linux security @ hp
--
This message was distributed to subscribers of the selinux mailing list.
If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
the words "unsubscribe selinux" without quotes as the message.
WARNING: multiple messages have this Message-ID (diff)
From: paul.moore@hp.com
To: netdev@vger.kernel.org, selinux@tycho.nsa.gov
Cc: Paul Moore <paul.moore@hp.com>
Subject: [PATCH 1/2] NetLabel: perform input validation earlier on CIPSOv4 DOI add ops
Date: Fri, 15 Dec 2006 16:49:27 -0500 [thread overview]
Message-ID: <20061215215229.014743000@hp.com> (raw)
In-Reply-To: 20061215214926.018950000@hp.com
[-- Attachment #1: netlabel-cipso_input_fix --]
[-- Type: text/plain, Size: 3736 bytes --]
From: Paul Moore <paul.moore@hp.com>
There are a couple of cases where the user input for a CIPSOv4 DOI add
operation was not being done soon enough; the result was unexpected behavior
which was resulting in oops/panics/lockups on some platforms. This patch moves
the existing input validation code earlier in the code path to protect against
bogus user input.
Signed-off-by: Paul Moore <paul.moore@hp.com>
---
net/netlabel/netlabel_cipso_v4.c | 28 +++++++++++++++++-----------
1 files changed, 17 insertions(+), 11 deletions(-)
Index: net-2.6.20_bugfix/net/netlabel/netlabel_cipso_v4.c
===================================================================
--- net-2.6.20_bugfix.orig/net/netlabel/netlabel_cipso_v4.c
+++ net-2.6.20_bugfix/net/netlabel/netlabel_cipso_v4.c
@@ -185,20 +185,31 @@ static int netlbl_cipsov4_add_std(struct
ret_val = netlbl_cipsov4_add_common(info, doi_def);
if (ret_val != 0)
goto add_std_failure;
+ ret_val = -EINVAL;
nla_for_each_nested(nla_a,
info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
nla_a_rem)
if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
nla_for_each_nested(nla_b, nla_a, nla_b_rem)
switch (nla_b->nla_type) {
case NLBL_CIPSOV4_A_MLSLVLLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_LVLS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->lvl.local_size)
doi_def->map.std->lvl.local_size =
nla_get_u32(nla_b) + 1;
break;
case NLBL_CIPSOV4_A_MLSLVLREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_LVLS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->lvl.cipso_size)
doi_def->map.std->lvl.cipso_size =
@@ -206,9 +217,6 @@ static int netlbl_cipsov4_add_std(struct
break;
}
}
- if (doi_def->map.std->lvl.local_size > CIPSO_V4_MAX_LOC_LVLS ||
- doi_def->map.std->lvl.cipso_size > CIPSO_V4_MAX_REM_LVLS)
- goto add_std_failure;
doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
sizeof(u32),
GFP_KERNEL);
@@ -230,11 +238,6 @@ static int netlbl_cipsov4_add_std(struct
struct nlattr *lvl_loc;
struct nlattr *lvl_rem;
- if (nla_validate_nested(nla_a,
- NLBL_CIPSOV4_A_MAX,
- netlbl_cipsov4_genl_policy) != 0)
- goto add_std_failure;
-
lvl_loc = nla_find_nested(nla_a,
NLBL_CIPSOV4_A_MLSLVLLOC);
lvl_rem = nla_find_nested(nla_a,
@@ -264,12 +267,18 @@ static int netlbl_cipsov4_add_std(struct
nla_for_each_nested(nla_b, nla_a, nla_b_rem)
switch (nla_b->nla_type) {
case NLBL_CIPSOV4_A_MLSCATLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_CATS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->cat.local_size)
doi_def->map.std->cat.local_size =
nla_get_u32(nla_b) + 1;
break;
case NLBL_CIPSOV4_A_MLSCATREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_CATS)
+ goto add_std_failure;
if (nla_get_u32(nla_b) >=
doi_def->map.std->cat.cipso_size)
doi_def->map.std->cat.cipso_size =
@@ -277,9 +286,6 @@ static int netlbl_cipsov4_add_std(struct
break;
}
}
- if (doi_def->map.std->cat.local_size > CIPSO_V4_MAX_LOC_CATS ||
- doi_def->map.std->cat.cipso_size > CIPSO_V4_MAX_REM_CATS)
- goto add_std_failure;
doi_def->map.std->cat.local = kcalloc(
doi_def->map.std->cat.local_size,
sizeof(u32),
--
paul moore
linux security @ hp
next prev parent reply other threads:[~2006-12-15 21:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-15 21:49 [PATCH 0/2] A bugfix patchset for NetLabel paul.moore
2006-12-15 21:49 ` paul.moore
2006-12-15 21:49 ` paul.moore [this message]
2006-12-15 21:49 ` [PATCH 1/2] NetLabel: perform input validation earlier on CIPSOv4 DOI add ops paul.moore
2006-12-15 21:49 ` [PATCH 2/2] NetLabel: correctly fill in unused CIPSOv4 level and category mappings paul.moore
2006-12-15 21:49 ` paul.moore
2006-12-16 1:19 ` [PATCH 0/2] A bugfix patchset for NetLabel James Morris
2006-12-16 1:19 ` James Morris
2006-12-18 1:14 ` David Miller
2006-12-18 16:24 ` Paul Moore
2006-12-18 16:24 ` Paul Moore
2006-12-18 17:10 ` James Morris
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20061215215229.014743000@hp.com \
--to=paul.moore@hp.com \
--cc=netdev@vger.kernel.org \
--cc=selinux@tycho.nsa.gov \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.