[git.ipfire.org] IPFire 2.x development tree branch, next, updated. 9dafa28a1c2df8335de30db300e2ca4093e57ccd

[git.ipfire.org] IPFire 2.x development tree branch, next, updated. 9dafa28a1c2df8335de30db300e2ca4093e57ccd

[Arne Fitzenreiter]

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- Log -----------------------------------------------------------------
commit 9dafa28a1c2df8335de30db300e2ca4093e57ccd
Author: Arne Fitzenreiter <arne_f(a)ipfire.org>
Date:   Fri Sep 11 22:16:27 2020 +0200

    Revert "kernel: add patch against CVE-2020-14386"
    
    This reverts commit f04023b1ca5675ce5463ca47186462179fd7a02a.
    
    Signed-off-by: Arne Fitzenreiter <arne_f(a)ipfire.org>

-----------------------------------------------------------------------

Summary of changes:
 lfs/linux                                          |  3 --
 ...86_net_packet_fix_overflow_in_tpacket_rcv.patch | 54 ----------------------
 2 files changed, 57 deletions(-)
 delete mode 100644 src/patches/linux/linux-cve-2020-14386_net_packet_fix_overflow_in_tpacket_rcv.patch

Difference in files:
diff --git a/lfs/linux b/lfs/linux
index 57f355e74..8bec96150 100644
--- a/lfs/linux
+++ b/lfs/linux
@@ -144,9 +144,6 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects))
 	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-random_try_to_actively_add_entropy.patch
 	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-4.14.x-add_timer_setup_on_stack.patch
 
-	# Patch CVE-2020-14386
-	cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/linux/linux-cve-2020-14386_net_packet_fix_overflow_in_tpacket_rcv.patch
-
 ifeq "$(KCFG)" "-multi"
 	# Apply Arm-multiarch kernel patches.
 	cd $(DIR_APP) && xzcat $(DIR_DL)/arm-multi-patches-$(ARM_PATCHES).patch.xz | patch -Np1
diff --git a/src/patches/linux/linux-cve-2020-14386_net_packet_fix_overflow_in_tpacket_rcv.patch b/src/patches/linux/linux-cve-2020-14386_net_packet_fix_overflow_in_tpacket_rcv.patch
deleted file mode 100644
index 439dca7ac..000000000
--- a/src/patches/linux/linux-cve-2020-14386_net_packet_fix_overflow_in_tpacket_rcv.patch
+++ /dev/null
@@ -1,54 +0,0 @@
-From acf69c946233259ab4d64f8869d4037a198c7f06 Mon Sep 17 00:00:00 2001
-From: Or Cohen <orcohen(a)paloaltonetworks.com>
-Date: Thu, 3 Sep 2020 21:05:28 -0700
-Subject: net/packet: fix overflow in tpacket_rcv
-
-Using tp_reserve to calculate netoff can overflow as
-tp_reserve is unsigned int and netoff is unsigned short.
-
-This may lead to macoff receving a smaller value then
-sizeof(struct virtio_net_hdr), and if po->has_vnet_hdr
-is set, an out-of-bounds write will occur when
-calling virtio_net_hdr_from_skb.
-
-The bug is fixed by converting netoff to unsigned int
-and checking if it exceeds USHRT_MAX.
-
-This addresses CVE-2020-14386
-
-Fixes: 8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
-Signed-off-by: Or Cohen <orcohen(a)paloaltonetworks.com>
-Signed-off-by: Eric Dumazet <edumazet(a)google.com>
-Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org>
----
- net/packet/af_packet.c | 7 ++++++-
- 1 file changed, 6 insertions(+), 1 deletion(-)
-
-diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
-index da8254e680f94..2b33e977a9059 100644
---- a/net/packet/af_packet.c
-+++ b/net/packet/af_packet.c
-@@ -2170,7 +2170,8 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
- 	int skb_len = skb->len;
- 	unsigned int snaplen, res;
- 	unsigned long status = TP_STATUS_USER;
--	unsigned short macoff, netoff, hdrlen;
-+	unsigned short macoff, hdrlen;
-+	unsigned int netoff;
- 	struct sk_buff *copy_skb = NULL;
- 	struct timespec64 ts;
- 	__u32 ts_status;
-@@ -2239,6 +2240,10 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
- 		}
- 		macoff = netoff - maclen;
- 	}
-+	if (netoff > USHRT_MAX) {
-+		atomic_inc(&po->tp_drops);
-+		goto drop_n_restore;
-+	}
- 	if (po->tp_version <= TPACKET_V2) {
- 		if (macoff + snaplen > po->rx_ring.frame_size) {
- 			if (po->copy_thresh &&
--- 
-cgit 1.2.3-1.el7
-


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