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rebase patches on top of Ubuntu-4.15.0-47.50

Browse Source 
(generated with debian/scripts/import-upstream-tag)

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Thomas Lamprecht 2019-03-13 07:25:59 +01:00
parent c19df7fe61
commit 89d8eaee98
7 changed files with 2 additions and 594 deletions
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2
patches/kernel/0004-kvm-disable-default-dynamic-halt-polling-growth.patch
View File

@ -12,7 +12,7 @@ Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 234d03abcb75..2e7d3aee779d 100644
index 238ddbc127e1..d7a24fd29144 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -77,7 +77,7 @@ module_param(halt_poll_ns, uint, 0644);

2
patches/kernel/0009-i40e-prevent-overlapping-tx_timeout-recover.patch
View File

@ -22,7 +22,7 @@ Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
2 files changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index e019baa905c5..80114d6a910a 100644
index a68b914776c7..09452e4b4877 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -145,6 +145,7 @@ enum i40e_state_t {

318
patches/kernel/0010-netfilter-ipset-Fix-wraparound-n-hash-net-types.patch
View File

@ -1,318 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Date: Fri, 12 Jan 2018 11:16:50 +0100
Subject: [PATCH] netfilter: ipset: Fix wraparound in hash:*net* types
Fix wraparound bug which could lead to memory exhaustion when adding an
x.x.x.x-255.255.255.255 range to any hash:*net* types.
Fixes Netfilter's bugzilla id #1212, reported by Thomas Schwark.
Fixes: 48596a8ddc46 ("netfilter: ipset: Fix adding an IPv4 range containing more than 2^31 addresses")
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/ipset/ip_set_hash_ipportnet.c | 26 ++++++++++-----------
net/netfilter/ipset/ip_set_hash_net.c | 9 ++++---
net/netfilter/ipset/ip_set_hash_netiface.c | 9 ++++---
net/netfilter/ipset/ip_set_hash_netnet.c | 28 +++++++++++-----------
net/netfilter/ipset/ip_set_hash_netport.c | 19 ++++++++-------
net/netfilter/ipset/ip_set_hash_netportnet.c | 35 ++++++++++++++--------------
6 files changed, 63 insertions(+), 63 deletions(-)
diff --git a/net/netfilter/ipset/ip_set_hash_ipportnet.c b/net/netfilter/ipset/ip_set_hash_ipportnet.c
index 0f164e986bf1..88b83d6d3084 100644
--- a/net/netfilter/ipset/ip_set_hash_ipportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_ipportnet.c
@@ -168,7 +168,7 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
struct hash_ipportnet4_elem e = { .cidr = HOST_MASK - 1 };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
u32 ip = 0, ip_to = 0, p = 0, port, port_to;
- u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
+ u32 ip2_from = 0, ip2_to = 0, ip2;
bool with_ports = false;
u8 cidr;
int ret;
@@ -269,22 +269,21 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
ip_set_mask_from_to(ip2_from, ip2_to, e.cidr + 1);
}
- if (retried)
+ if (retried) {
ip = ntohl(h->next.ip);
+ p = ntohs(h->next.port);
+ ip2 = ntohl(h->next.ip2);
+ } else {
+ p = port;
+ ip2 = ip2_from;
+ }
for (; ip <= ip_to; ip++) {
e.ip = htonl(ip);
- p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
- : port;
for (; p <= port_to; p++) {
e.port = htons(p);
- ip2 = retried &&
- ip == ntohl(h->next.ip) &&
- p == ntohs(h->next.port)
- ? ntohl(h->next.ip2) : ip2_from;
- while (ip2 <= ip2_to) {
+ do {
e.ip2 = htonl(ip2);
- ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
- &cidr);
+ ip2 = ip_set_range_to_cidr(ip2, ip2_to, &cidr);
e.cidr = cidr - 1;
ret = adtfn(set, &e, &ext, &ext, flags);
@@ -292,9 +291,10 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
return ret;
ret = 0;
- ip2 = ip2_last + 1;
- }
+ } while (ip2++ < ip2_to);
+ ip2 = ip2_from;
}
+ p = port;
}
return ret;
}
diff --git a/net/netfilter/ipset/ip_set_hash_net.c b/net/netfilter/ipset/ip_set_hash_net.c
index 1c67a1761e45..5449e23af13a 100644
--- a/net/netfilter/ipset/ip_set_hash_net.c
+++ b/net/netfilter/ipset/ip_set_hash_net.c
@@ -143,7 +143,7 @@ hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_net4_elem e = { .cidr = HOST_MASK };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
- u32 ip = 0, ip_to = 0, last;
+ u32 ip = 0, ip_to = 0;
int ret;
if (tb[IPSET_ATTR_LINENO])
@@ -193,16 +193,15 @@ hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
}
if (retried)
ip = ntohl(h->next.ip);
- while (ip <= ip_to) {
+ do {
e.ip = htonl(ip);
- last = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
+ ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
ret = 0;
- ip = last + 1;
- }
+ } while (ip++ < ip_to);
return ret;
}
diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
index d417074f1c1a..f5164c1efce2 100644
--- a/net/netfilter/ipset/ip_set_hash_netiface.c
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -200,7 +200,7 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netiface4_elem e = { .cidr = HOST_MASK, .elem = 1 };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
- u32 ip = 0, ip_to = 0, last;
+ u32 ip = 0, ip_to = 0;
int ret;
if (tb[IPSET_ATTR_LINENO])
@@ -255,17 +255,16 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
if (retried)
ip = ntohl(h->next.ip);
- while (ip <= ip_to) {
+ do {
e.ip = htonl(ip);
- last = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
+ ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
ret = 0;
- ip = last + 1;
- }
+ } while (ip++ < ip_to);
return ret;
}
diff --git a/net/netfilter/ipset/ip_set_hash_netnet.c b/net/netfilter/ipset/ip_set_hash_netnet.c
index 7f9ae2e9645b..5a2b923bd81f 100644
--- a/net/netfilter/ipset/ip_set_hash_netnet.c
+++ b/net/netfilter/ipset/ip_set_hash_netnet.c
@@ -169,8 +169,8 @@ hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netnet4_elem e = { };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
- u32 ip = 0, ip_to = 0, last;
- u32 ip2 = 0, ip2_from = 0, ip2_to = 0, last2;
+ u32 ip = 0, ip_to = 0;
+ u32 ip2 = 0, ip2_from = 0, ip2_to = 0;
int ret;
if (tb[IPSET_ATTR_LINENO])
@@ -247,27 +247,27 @@ hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
}
- if (retried)
+ if (retried) {
ip = ntohl(h->next.ip[0]);
+ ip2 = ntohl(h->next.ip[1]);
+ } else {
+ ip2 = ip2_from;
+ }
- while (ip <= ip_to) {
+ do {
e.ip[0] = htonl(ip);
- last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
- ip2 = (retried &&
- ip == ntohl(h->next.ip[0])) ? ntohl(h->next.ip[1])
- : ip2_from;
- while (ip2 <= ip2_to) {
+ ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
+ do {
e.ip[1] = htonl(ip2);
- last2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
+ ip2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
ret = 0;
- ip2 = last2 + 1;
- }
- ip = last + 1;
- }
+ } while (ip2++ < ip2_to);
+ ip2 = ip2_from;
+ } while (ip++ < ip_to);
return ret;
}
diff --git a/net/netfilter/ipset/ip_set_hash_netport.c b/net/netfilter/ipset/ip_set_hash_netport.c
index e6ef382febe4..1a187be9ebc8 100644
--- a/net/netfilter/ipset/ip_set_hash_netport.c
+++ b/net/netfilter/ipset/ip_set_hash_netport.c
@@ -161,7 +161,7 @@ hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netport4_elem e = { .cidr = HOST_MASK - 1 };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
- u32 port, port_to, p = 0, ip = 0, ip_to = 0, last;
+ u32 port, port_to, p = 0, ip = 0, ip_to = 0;
bool with_ports = false;
u8 cidr;
int ret;
@@ -239,25 +239,26 @@ hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
ip_set_mask_from_to(ip, ip_to, e.cidr + 1);
}
- if (retried)
+ if (retried) {
ip = ntohl(h->next.ip);
- while (ip <= ip_to) {
+ p = ntohs(h->next.port);
+ } else {
+ p = port;
+ }
+ do {
e.ip = htonl(ip);
- last = ip_set_range_to_cidr(ip, ip_to, &cidr);
+ ip = ip_set_range_to_cidr(ip, ip_to, &cidr);
e.cidr = cidr - 1;
- p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
- : port;
for (; p <= port_to; p++) {
e.port = htons(p);
ret = adtfn(set, &e, &ext, &ext, flags);
-
if (ret && !ip_set_eexist(ret, flags))
return ret;
ret = 0;
}
- ip = last + 1;
- }
+ p = port;
+ } while (ip++ < ip_to);
return ret;
}
diff --git a/net/netfilter/ipset/ip_set_hash_netportnet.c b/net/netfilter/ipset/ip_set_hash_netportnet.c
index 8602f2595a1a..d391485a6acd 100644
--- a/net/netfilter/ipset/ip_set_hash_netportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_netportnet.c
@@ -184,8 +184,8 @@ hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
ipset_adtfn adtfn = set->variant->adt[adt];
struct hash_netportnet4_elem e = { };
struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
- u32 ip = 0, ip_to = 0, ip_last, p = 0, port, port_to;
- u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
+ u32 ip = 0, ip_to = 0, p = 0, port, port_to;
+ u32 ip2_from = 0, ip2_to = 0, ip2;
bool with_ports = false;
int ret;
@@ -288,33 +288,34 @@ hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
}
- if (retried)
+ if (retried) {
ip = ntohl(h->next.ip[0]);
+ p = ntohs(h->next.port);
+ ip2 = ntohl(h->next.ip[1]);
+ } else {
+ p = port;
+ ip2 = ip2_from;
+ }
- while (ip <= ip_to) {
+ do {
e.ip[0] = htonl(ip);
- ip_last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
- p = retried && ip == ntohl(h->next.ip[0]) ? ntohs(h->next.port)
- : port;
+ ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
for (; p <= port_to; p++) {
e.port = htons(p);
- ip2 = (retried && ip == ntohl(h->next.ip[0]) &&
- p == ntohs(h->next.port)) ? ntohl(h->next.ip[1])
- : ip2_from;
- while (ip2 <= ip2_to) {
+ do {
e.ip[1] = htonl(ip2);
- ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
- &e.cidr[1]);
+ ip2 = ip_set_range_to_cidr(ip2, ip2_to,
+ &e.cidr[1]);
ret = adtfn(set, &e, &ext, &ext, flags);
if (ret && !ip_set_eexist(ret, flags))
return ret;
ret = 0;
- ip2 = ip2_last + 1;
- }
+ } while (ip2++ < ip2_to);
+ ip2 = ip2_from;
}
- ip = ip_last + 1;
- }
+ p = port;
+ } while (ip++ < ip_to);
return ret;
}
--
2.11.0

118
patches/kernel/0011-net-crypto-set-sk-to-NULL-when-af_alg_release.patch
View File

@ -1,118 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mao Wenan <maowenan@huawei.com>
Date: Mon, 18 Feb 2019 10:44:44 +0800
Subject: [PATCH] net: crypto set sk to NULL when af_alg_release.
KASAN has found use-after-free in sockfs_setattr.
The existed commit 6d8c50dcb029 ("socket: close race condition between sock_close()
and sockfs_setattr()") is to fix this simillar issue, but it seems to ignore
that crypto module forgets to set the sk to NULL after af_alg_release.
KASAN report details as below:
BUG: KASAN: use-after-free in sockfs_setattr+0x120/0x150
Write of size 4 at addr ffff88837b956128 by task syz-executor0/4186
CPU: 2 PID: 4186 Comm: syz-executor0 Not tainted xxx + #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.10.2-1ubuntu1 04/01/2014
Call Trace:
dump_stack+0xca/0x13e
print_address_description+0x79/0x330
? vprintk_func+0x5e/0xf0
kasan_report+0x18a/0x2e0
? sockfs_setattr+0x120/0x150
sockfs_setattr+0x120/0x150
? sock_register+0x2d0/0x2d0
notify_change+0x90c/0xd40
? chown_common+0x2ef/0x510
chown_common+0x2ef/0x510
? chmod_common+0x3b0/0x3b0
? __lock_is_held+0xbc/0x160
? __sb_start_write+0x13d/0x2b0
? __mnt_want_write+0x19a/0x250
do_fchownat+0x15c/0x190
? __ia32_sys_chmod+0x80/0x80
? trace_hardirqs_on_thunk+0x1a/0x1c
__x64_sys_fchownat+0xbf/0x160
? lockdep_hardirqs_on+0x39a/0x5e0
do_syscall_64+0xc8/0x580
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462589
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89
f7 48 89 d6 48 89
ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3
48 c7 c1 bc ff ff
ff f7 d8 64 89 01 48
RSP: 002b:00007fb4b2c83c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 000000000072bfa0 RCX: 0000000000462589
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000007
RBP: 0000000000000005 R08: 0000000000001000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb4b2c846bc
R13: 00000000004bc733 R14: 00000000006f5138 R15: 00000000ffffffff
Allocated by task 4185:
kasan_kmalloc+0xa0/0xd0
__kmalloc+0x14a/0x350
sk_prot_alloc+0xf6/0x290
sk_alloc+0x3d/0xc00
af_alg_accept+0x9e/0x670
hash_accept+0x4a3/0x650
__sys_accept4+0x306/0x5c0
__x64_sys_accept4+0x98/0x100
do_syscall_64+0xc8/0x580
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 4184:
__kasan_slab_free+0x12e/0x180
kfree+0xeb/0x2f0
__sk_destruct+0x4e6/0x6a0
sk_destruct+0x48/0x70
__sk_free+0xa9/0x270
sk_free+0x2a/0x30
af_alg_release+0x5c/0x70
__sock_release+0xd3/0x280
sock_close+0x1a/0x20
__fput+0x27f/0x7f0
task_work_run+0x136/0x1b0
exit_to_usermode_loop+0x1a7/0x1d0
do_syscall_64+0x461/0x580
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Syzkaller reproducer:
r0 = perf_event_open(&(0x7f0000000000)={0x0, 0x70, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, @perf_config_ext}, 0x0, 0x0,
0xffffffffffffffff, 0x0)
r1 = socket$alg(0x26, 0x5, 0x0)
getrusage(0x0, 0x0)
bind(r1, &(0x7f00000001c0)=@alg={0x26, 'hash\x00', 0x0, 0x0,
'sha256-ssse3\x00'}, 0x80)
r2 = accept(r1, 0x0, 0x0)
r3 = accept4$unix(r2, 0x0, 0x0, 0x0)
r4 = dup3(r3, r0, 0x0)
fchownat(r4, &(0x7f00000000c0)='\x00', 0x0, 0x0, 0x1000)
Fixes: 6d8c50dcb029 ("socket: close race condition between sock_close() and sockfs_setattr()")
Signed-off-by: Mao Wenan <maowenan@huawei.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
crypto/af_alg.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index 671e42ff21d4..493002afae73 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -122,8 +122,10 @@ static void alg_do_release(const struct af_alg_type *type, void *private)
int af_alg_release(struct socket *sock)
{
- if (sock->sk)
+ if (sock->sk) {
sock_put(sock->sk);
+ sock->sk = NULL;
+ }
return 0;
}
EXPORT_SYMBOL_GPL(af_alg_release);

60
patches/kernel/0012-kvm-fix-kvm_ioctl_create_device-reference-counting-C.patch
View File

@ -1,60 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jann Horn <jannh@google.com>
Date: Mon, 25 Feb 2019 11:48:05 +0000
Subject: [PATCH] kvm: fix kvm_ioctl_create_device() reference counting
(CVE-2019-6974)
kvm_ioctl_create_device() does the following:
1. creates a device that holds a reference to the VM object (with a borrowed
reference, the VM's refcount has not been bumped yet)
2. initializes the device
3. transfers the reference to the device to the caller's file descriptor table
4. calls kvm_get_kvm() to turn the borrowed reference to the VM into a real
reference
The ownership transfer in step 3 must not happen before the reference to the VM
becomes a proper, non-borrowed reference, which only happens in step 4.
After step 3, an attacker can close the file descriptor and drop the borrowed
reference, which can cause the refcount of the kvm object to drop to zero.
This means that we need to grab a reference for the device before
anon_inode_getfd(), otherwise the VM can disappear from under us.
Fixes: 852b6d57dc7f ("kvm: add device control API")
Cc: stable@kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
CVE-2019-6974
(cherry picked from commit cfa39381173d5f969daf43582c95ad679189cbc9)
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
virt/kvm/kvm_main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 234d03abcb75..238ddbc127e1 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2908,8 +2908,10 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
if (ops->init)
ops->init(dev);
+ kvm_get_kvm(kvm);
ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR | O_CLOEXEC);
if (ret < 0) {
+ kvm_put_kvm(kvm);
mutex_lock(&kvm->lock);
list_del(&dev->vm_node);
mutex_unlock(&kvm->lock);
@@ -2917,7 +2919,6 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
return ret;
}
- kvm_get_kvm(kvm);
cd->fd = ret;
return 0;
}

46
patches/kernel/0013-KVM-nVMX-unconditionally-cancel-preemption-timer-in-.patch
View File

@ -1,46 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Shier <pshier@google.com>
Date: Mon, 25 Feb 2019 11:48:06 +0000
Subject: [PATCH] KVM: nVMX: unconditionally cancel preemption timer in
free_nested (CVE-2019-7221)
Bugzilla: 1671904
There are multiple code paths where an hrtimer may have been started to
emulate an L1 VMX preemption timer that can result in a call to free_nested
without an intervening L2 exit where the hrtimer is normally
cancelled. Unconditionally cancel in free_nested to cover all cases.
Embargoed until Feb 7th 2019.
Signed-off-by: Peter Shier <pshier@google.com>
Reported-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reported-by: Felix Wilhelm <fwilhelm@google.com>
Cc: stable@kernel.org
Message-Id: <20181011184646.154065-1-pshier@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
CVE-2019-7221
(backported from commit ecec76885bcfe3294685dc363fd1273df0d5d65f)
[tyhicks: Backport to 4.18:
- free_nested() is in arch/x86/kvm/vmx.c]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
arch/x86/kvm/vmx.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 7ade6cb125d3..37b095e7f00a 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7681,6 +7681,7 @@ static void free_nested(struct vcpu_vmx *vmx)
if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon)
return;
+ hrtimer_cancel(&vmx->nested.preemption_timer);
vmx->nested.vmxon = false;
vmx->nested.smm.vmxon = false;
free_vpid(vmx->nested.vpid02);

50
patches/kernel/0014-KVM-x86-work-around-leak-of-uninitialized-stack-cont.patch
View File

@ -1,50 +0,0 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 25 Feb 2019 11:48:07 +0000
Subject: [PATCH] KVM: x86: work around leak of uninitialized stack contents
(CVE-2019-7222)
Bugzilla: 1671930
Emulation of certain instructions (VMXON, VMCLEAR, VMPTRLD, VMWRITE with
memory operand, INVEPT, INVVPID) can incorrectly inject a page fault
when passed an operand that points to an MMIO address. The page fault
will use uninitialized kernel stack memory as the CR2 and error code.
The right behavior would be to abort the VM with a KVM_EXIT_INTERNAL_ERROR
exit to userspace; however, it is not an easy fix, so for now just
ensure that the error code and CR2 are zero.
Embargoed until Feb 7th 2019.
Reported-by: Felix Wilhelm <fwilhelm@google.com>
Cc: stable@kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
CVE-2019-7222
(cherry picked from commit 353c0956a618a07ba4bbe7ad00ff29fe70e8412a)
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---
arch/x86/kvm/x86.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b3df576413cd..13804929adce 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4632,6 +4632,13 @@ int kvm_read_guest_virt(struct kvm_vcpu *vcpu,
{
u32 access = (kvm_x86_ops->get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
+ /*
+ * FIXME: this should call handle_emulation_failure if X86EMUL_IO_NEEDED
+ * is returned, but our callers are not ready for that and they blindly
+ * call kvm_inject_page_fault. Ensure that they at least do not leak
+ * uninitialized kernel stack memory into cr2 and error code.
+ */
+ memset(exception, 0, sizeof(*exception));
return kvm_read_guest_virt_helper(addr, val, bytes, vcpu, access,
exception);
}