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-rw-r--r--netfilter-ctnetlink-add-range-check-for-l3-l4-protonum.patch63
1 files changed, 0 insertions, 63 deletions
diff --git a/netfilter-ctnetlink-add-range-check-for-l3-l4-protonum.patch b/netfilter-ctnetlink-add-range-check-for-l3-l4-protonum.patch
deleted file mode 100644
index 5e3901440..000000000
--- a/netfilter-ctnetlink-add-range-check-for-l3-l4-protonum.patch
+++ /dev/null
@@ -1,63 +0,0 @@
-From 1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6 Mon Sep 17 00:00:00 2001
-From: Will McVicker <willmcvicker@google.com>
-Date: Mon, 24 Aug 2020 19:38:32 +0000
-Subject: netfilter: ctnetlink: add a range check for l3/l4 protonum
-
-The indexes to the nf_nat_l[34]protos arrays come from userspace. So
-check the tuple's family, e.g. l3num, when creating the conntrack in
-order to prevent an OOB memory access during setup. Here is an example
-kernel panic on 4.14.180 when userspace passes in an index greater than
-NFPROTO_NUMPROTO.
-
-Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
-Modules linked in:...
-Process poc (pid: 5614, stack limit = 0x00000000a3933121)
-CPU: 4 PID: 5614 Comm: poc Tainted: G S W O 4.14.180-g051355490483
-Hardware name: Qualcomm Technologies, Inc. SM8150 V2 PM8150 Google Inc. MSM
-task: 000000002a3dfffe task.stack: 00000000a3933121
-pc : __cfi_check_fail+0x1c/0x24
-lr : __cfi_check_fail+0x1c/0x24
-...
-Call trace:
-__cfi_check_fail+0x1c/0x24
-name_to_dev_t+0x0/0x468
-nfnetlink_parse_nat_setup+0x234/0x258
-ctnetlink_parse_nat_setup+0x4c/0x228
-ctnetlink_new_conntrack+0x590/0xc40
-nfnetlink_rcv_msg+0x31c/0x4d4
-netlink_rcv_skb+0x100/0x184
-nfnetlink_rcv+0xf4/0x180
-netlink_unicast+0x360/0x770
-netlink_sendmsg+0x5a0/0x6a4
-___sys_sendmsg+0x314/0x46c
-SyS_sendmsg+0xb4/0x108
-el0_svc_naked+0x34/0x38
-
-This crash is not happening since 5.4+, however, ctnetlink still
-allows for creating entries with unsupported layer 3 protocol number.
-
-Fixes: c1d10adb4a521 ("[NETFILTER]: Add ctnetlink port for nf_conntrack")
-Signed-off-by: Will McVicker <willmcvicker@google.com>
-[pablo@netfilter.org: rebased original patch on top of nf.git]
-Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
----
- net/netfilter/nf_conntrack_netlink.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
-index 832eabecfbddc..d65846aa80591 100644
---- a/net/netfilter/nf_conntrack_netlink.c
-+++ b/net/netfilter/nf_conntrack_netlink.c
-@@ -1404,7 +1404,8 @@ ctnetlink_parse_tuple_filter(const struct nlattr * const cda[],
- if (err < 0)
- return err;
-
--
-+ if (l3num != NFPROTO_IPV4 && l3num != NFPROTO_IPV6)
-+ return -EOPNOTSUPP;
- tuple->src.l3num = l3num;
-
- if (flags & CTA_FILTER_FLAG(CTA_IP_DST) ||
---
-cgit 1.2.3-1.el7
-