From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, linmiaohe <linmiaohe@huawei.com>,
"David S. Miller" <davem@davemloft.net>
Subject: [PATCH 5.0 11/43] net: sit: fix UBSAN Undefined behaviour in check_6rd
Date: Mon, 18 Mar 2019 10:24:03 +0100 [thread overview]
Message-ID: <20190318083716.204410350@linuxfoundation.org> (raw)
In-Reply-To: <20190318083715.877441740@linuxfoundation.org>
5.0-stable review patch. If anyone has any objections, please let me know.
------------------
From: Miaohe Lin <linmiaohe@huawei.com>
[ Upstream commit a843dc4ebaecd15fca1f4d35a97210f72ea1473b ]
In func check_6rd,tunnel->ip6rd.relay_prefixlen may equal to
32,so UBSAN complain about it.
UBSAN: Undefined behaviour in net/ipv6/sit.c:781:47
shift exponent 32 is too large for 32-bit type 'unsigned int'
CPU: 6 PID: 20036 Comm: syz-executor.0 Not tainted 4.19.27 #2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1
04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xca/0x13e lib/dump_stack.c:113
ubsan_epilogue+0xe/0x81 lib/ubsan.c:159
__ubsan_handle_shift_out_of_bounds+0x293/0x2e8 lib/ubsan.c:425
check_6rd.constprop.9+0x433/0x4e0 net/ipv6/sit.c:781
try_6rd net/ipv6/sit.c:806 [inline]
ipip6_tunnel_xmit net/ipv6/sit.c:866 [inline]
sit_tunnel_xmit+0x141c/0x2720 net/ipv6/sit.c:1033
__netdev_start_xmit include/linux/netdevice.h:4300 [inline]
netdev_start_xmit include/linux/netdevice.h:4309 [inline]
xmit_one net/core/dev.c:3243 [inline]
dev_hard_start_xmit+0x17c/0x780 net/core/dev.c:3259
__dev_queue_xmit+0x1656/0x2500 net/core/dev.c:3829
neigh_output include/net/neighbour.h:501 [inline]
ip6_finish_output2+0xa36/0x2290 net/ipv6/ip6_output.c:120
ip6_finish_output+0x3e7/0xa20 net/ipv6/ip6_output.c:154
NF_HOOK_COND include/linux/netfilter.h:278 [inline]
ip6_output+0x1e2/0x720 net/ipv6/ip6_output.c:171
dst_output include/net/dst.h:444 [inline]
ip6_local_out+0x99/0x170 net/ipv6/output_core.c:176
ip6_send_skb+0x9d/0x2f0 net/ipv6/ip6_output.c:1697
ip6_push_pending_frames+0xc0/0x100 net/ipv6/ip6_output.c:1717
rawv6_push_pending_frames net/ipv6/raw.c:616 [inline]
rawv6_sendmsg+0x2435/0x3530 net/ipv6/raw.c:946
inet_sendmsg+0xf8/0x5c0 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg+0xc8/0x110 net/socket.c:631
___sys_sendmsg+0x6cf/0x890 net/socket.c:2114
__sys_sendmsg+0xf0/0x1b0 net/socket.c:2152
do_syscall_64+0xc8/0x580 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Signed-off-by: linmiaohe <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
net/ipv6/sit.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -778,8 +778,9 @@ static bool check_6rd(struct ip_tunnel *
pbw0 = tunnel->ip6rd.prefixlen >> 5;
pbi0 = tunnel->ip6rd.prefixlen & 0x1f;
- d = (ntohl(v6dst->s6_addr32[pbw0]) << pbi0) >>
- tunnel->ip6rd.relay_prefixlen;
+ d = tunnel->ip6rd.relay_prefixlen < 32 ?
+ (ntohl(v6dst->s6_addr32[pbw0]) << pbi0) >>
+ tunnel->ip6rd.relay_prefixlen : 0;
pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen;
if (pbi1 > 0)
next prev parent reply other threads:[~2019-03-18 9:49 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-18 9:23 [PATCH 5.0 00/43] 5.0.3-stable review Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 01/43] connector: fix unsafe usage of ->real_parent Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 02/43] fou, fou6: avoid uninit-value in gue_err() and gue6_err() Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 03/43] gro_cells: make sure device is up in gro_cells_receive() Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 04/43] ipv4/route: fail early when inet dev is missing Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 05/43] l2tp: fix infoleak in l2tp_ip6_recvmsg() Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 06/43] lan743x: Fix RX Kernel Panic Greg Kroah-Hartman
2019-03-18 9:23 ` [PATCH 5.0 07/43] lan743x: Fix TX Stall Issue Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 08/43] net: hns3: add dma_rmb() for rx description Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 09/43] net: hsr: fix memory leak in hsr_dev_finalize() Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 10/43] net/hsr: fix possible crash in add_timer() Greg Kroah-Hartman
2019-03-18 9:24 ` Greg Kroah-Hartman [this message]
2019-03-18 9:24 ` [PATCH 5.0 12/43] net/x25: fix use-after-free in x25_device_event() Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 13/43] net/x25: reset state in x25_connect() Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 14/43] pptp: dst_release sk_dst_cache in pptp_sock_destruct Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 15/43] ravb: Decrease TxFIFO depth of Q3 and Q2 to one Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 16/43] route: set the deleted fnhe fnhe_daddr to 0 in ip_del_fnhe to fix a race Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 17/43] rxrpc: Fix client call queueing, waiting for channel Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 18/43] sctp: remove sched init from sctp_stream_init Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 19/43] tcp: do not report TCP_CM_INQ of 0 for closed connections Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 20/43] tcp: Dont access TCP_SKB_CB before initializing it Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 21/43] tcp: handle inet_csk_reqsk_queue_add() failures Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 22/43] vxlan: Fix GRO cells race condition between receive and link delete Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 23/43] vxlan: test dev->flags & IFF_UP before calling gro_cells_receive() Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 24/43] net/mlx4_core: Fix reset flow when in command polling mode Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 25/43] net/mlx4_core: Fix locking in SRIOV mode when switching between events and polling Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 26/43] net/mlx4_core: Fix qp mtt size calculation Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 27/43] net: dsa: mv88e6xxx: Set correct interface mode for CPU/DSA ports Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 28/43] net: hns3: fix to stop multiple HNS reset due to the AER changes Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 29/43] vsock/virtio: fix kernel panic from virtio_transport_reset_no_sock Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 30/43] net: sched: flower: insert new filter to idr after setting its mask Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 31/43] f2fs: wait on atomic writes to count F2FS_CP_WB_DATA Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 32/43] perf/x86: Fixup typo in stub functions Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 33/43] ALSA: bebob: use more identical mod_alias for Saffire Pro 10 I/O against Liquid Saffire 56 Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 34/43] ALSA: firewire-motu: fix construction of PCM frame for capture direction Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 35/43] ALSA: hda: Extend i915 component bind timeout Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 36/43] ALSA: hda - add more quirks for HP Z2 G4 and HP Z240 Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 37/43] ALSA: hda/realtek: Enable audio jacks of ASUS UX362FA with ALC294 Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 38/43] ALSA: hda/realtek - Reduce click noise on Dell Precision 5820 headphone Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 39/43] ALSA: hda/realtek: Enable headset MIC of Acer TravelMate X514-51T with ALC255 Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 40/43] perf/x86/intel: Fix memory corruption Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 41/43] perf/x86/intel: Make dev_attr_allow_tsx_force_abort static Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 42/43] Its wrong to add len to sector_nr in raid10 reshape twice Greg Kroah-Hartman
2019-03-18 9:24 ` [PATCH 5.0 43/43] drm: Block fb changes for async plane updates Greg Kroah-Hartman
2019-03-19 2:26 ` [PATCH 5.0 00/43] 5.0.3-stable review Guenter Roeck
2019-03-19 12:19 ` Greg Kroah-Hartman
2019-03-19 2:54 ` Naresh Kamboju
2019-03-19 12:20 ` Greg Kroah-Hartman
2019-03-19 10:34 ` Jon Hunter
2019-03-19 12:17 ` Greg Kroah-Hartman
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