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core/linux-odroid-c2 to 3.14.79-13
This commit is contained in:
Kevin Mihelich
parent
a0fbfc56f5
commit
d9c202a269
3 changed files with 102 additions and 7 deletions
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@ -1,7 +1,7 @@
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From 7474934d7294f066a04d258fdcb364bbe3c92a85 Mon Sep 17 00:00:00 2001
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From 27611b7b580f13397bc38b19c224f47c38a9cea3 Mon Sep 17 00:00:00 2001
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From: Kevin Mihelich <kevin@archlinuxarm.org>
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Date: Thu, 26 May 2016 06:29:07 -0600
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Subject: [PATCH] add extra errata 843419 build flags
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Subject: [PATCH 1/2] add extra errata 843419 build flags
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---
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arch/arm64/Makefile | 1 +
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@ -20,5 +20,5 @@ index 18ea69f..59c5e48 100644
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# Default value
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--
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2.7.2
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2.10.2
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@ -0,0 +1,92 @@
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From 577171f3e8ada245e12261484b5154def1a0c3c9 Mon Sep 17 00:00:00 2001
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From: Philip Pettersson <philip.pettersson@gmail.com>
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Date: Wed, 30 Nov 2016 14:55:36 -0800
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Subject: [PATCH 2/2] packet: fix race condition in packet_set_ring
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When packet_set_ring creates a ring buffer it will initialize a
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struct timer_list if the packet version is TPACKET_V3. This value
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can then be raced by a different thread calling setsockopt to
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set the version to TPACKET_V1 before packet_set_ring has finished.
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This leads to a use-after-free on a function pointer in the
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struct timer_list when the socket is closed as the previously
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initialized timer will not be deleted.
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The bug is fixed by taking lock_sock(sk) in packet_setsockopt when
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changing the packet version while also taking the lock at the start
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of packet_set_ring.
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Fixes: f6fb8f100b80 ("af-packet: TPACKET_V3 flexible buffer implementation.")
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Signed-off-by: Philip Pettersson <philip.pettersson@gmail.com>
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Signed-off-by: Eric Dumazet <edumazet@google.com>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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net/packet/af_packet.c | 18 ++++++++++++------
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1 file changed, 12 insertions(+), 6 deletions(-)
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diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
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index c8078af..cafd6ec 100644
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--- a/net/packet/af_packet.c
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+++ b/net/packet/af_packet.c
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@@ -3291,19 +3291,25 @@ packet_setsockopt(struct socket *sock, int level, int optname, char __user *optv
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if (optlen != sizeof(val))
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return -EINVAL;
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- if (po->rx_ring.pg_vec || po->tx_ring.pg_vec)
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- return -EBUSY;
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if (copy_from_user(&val, optval, sizeof(val)))
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return -EFAULT;
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switch (val) {
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case TPACKET_V1:
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case TPACKET_V2:
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case TPACKET_V3:
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- po->tp_version = val;
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- return 0;
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+ break;
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default:
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return -EINVAL;
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}
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+ lock_sock(sk);
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+ if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) {
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+ ret = -EBUSY;
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+ } else {
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+ po->tp_version = val;
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+ ret = 0;
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+ }
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+ release_sock(sk);
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+ return ret;
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}
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case PACKET_RESERVE:
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{
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@@ -3766,6 +3772,7 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
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/* Added to avoid minimal code churn */
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struct tpacket_req *req = &req_u->req;
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+ lock_sock(sk);
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/* Opening a Tx-ring is NOT supported in TPACKET_V3 */
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if (!closing && tx_ring && (po->tp_version > TPACKET_V2)) {
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WARN(1, "Tx-ring is not supported.\n");
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@@ -3847,7 +3854,6 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
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goto out;
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}
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- lock_sock(sk);
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/* Detach socket from network */
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spin_lock(&po->bind_lock);
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@@ -3896,11 +3902,11 @@ static int packet_set_ring(struct sock *sk, union tpacket_req_u *req_u,
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if (!tx_ring)
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prb_shutdown_retire_blk_timer(po, tx_ring, rb_queue);
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}
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- release_sock(sk);
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if (pg_vec)
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free_pg_vec(pg_vec, order, req->tp_block_nr);
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out:
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+ release_sock(sk);
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return err;
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}
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--
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2.10.2
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@ -4,12 +4,12 @@
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buildarch=8
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pkgbase=linux-odroid-c2
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_commit=503a8af934ca5351a2ec3690ad30d33e0d2f0f00
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_commit=0778f0b332d5919b15d32dab15604d440fb7984e
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_srcname=linux-${_commit}
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_kernelname=${pkgbase#linux}
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_desc="ODROID-C2"
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pkgver=3.14.79
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pkgrel=12
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pkgrel=13
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arch=('aarch64')
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url="https://github.com/hardkernel/linux/tree/odroidc2-3.14.y"
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license=('GPL2')
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@ -18,12 +18,14 @@ options=('!strip')
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source=("https://github.com/hardkernel/linux/archive/${_commit}.tar.gz"
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"git+https://github.com/mdrjr/c2_bootini.git"
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'0001-add-extra-errata-843419-build-flags.patch'
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'0002-packet-fix-race-condition-in-packet_set_ring.patch'
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'config'
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'linux.preset'
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'amlogic.service')
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md5sums=('5d14b06b27a8c04b0398984a42f50dee'
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md5sums=('6761af79e532603d047333922d14d5b2'
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'SKIP'
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'3c4a5342ac88d86b4bf99e7d0b8b2977'
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'7df92923b447253d37234fec3f3c48b1'
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'09ddfd3c3e1b76cd2ffb2e9a61d08bbe'
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'b1d8a7d34532252fa4434911b09c5527'
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'85fd3026c435ffa6d7c2d7f9767b4251'
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'b8956789318f49cec5b8bb0b41654a9b')
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@ -40,6 +42,7 @@ prepare() {
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sed -i '2iexit 0' scripts/depmod.sh
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patch -p1 -i ../0001-add-extra-errata-843419-build-flags.patch
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patch -p1 -i ../0002-packet-fix-race-condition-in-packet_set_ring.patch
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}
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build() {
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