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From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Sean Tranchetti <stranche@codeaurora.org>,
	Steffen Klassert <steffen.klassert@secunet.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.9 09/38] xfrm: validate template mode
Date: Tue, 16 Oct 2018 00:14:53 -0400	[thread overview]
Message-ID: <20181016041522.135789-9-sashal@kernel.org> (raw)
In-Reply-To: <20181016041522.135789-1-sashal@kernel.org>

From: Sean Tranchetti <stranche@codeaurora.org>

[ Upstream commit 32bf94fb5c2ec4ec842152d0e5937cd4bb6738fa ]

XFRM mode parameters passed as part of the user templates
in the IP_XFRM_POLICY are never properly validated. Passing
values other than valid XFRM modes can cause stack-out-of-bounds
reads to occur later in the XFRM processing:

[  140.535608] ================================================================
[  140.543058] BUG: KASAN: stack-out-of-bounds in xfrm_state_find+0x17e4/0x1cc4
[  140.550306] Read of size 4 at addr ffffffc0238a7a58 by task repro/5148
[  140.557369]
[  140.558927] Call trace:
[  140.558936] dump_backtrace+0x0/0x388
[  140.558940] show_stack+0x24/0x30
[  140.558946] __dump_stack+0x24/0x2c
[  140.558949] dump_stack+0x8c/0xd0
[  140.558956] print_address_description+0x74/0x234
[  140.558960] kasan_report+0x240/0x264
[  140.558963] __asan_report_load4_noabort+0x2c/0x38
[  140.558967] xfrm_state_find+0x17e4/0x1cc4
[  140.558971] xfrm_resolve_and_create_bundle+0x40c/0x1fb8
[  140.558975] xfrm_lookup+0x238/0x1444
[  140.558977] xfrm_lookup_route+0x48/0x11c
[  140.558984] ip_route_output_flow+0x88/0xc4
[  140.558991] raw_sendmsg+0xa74/0x266c
[  140.558996] inet_sendmsg+0x258/0x3b0
[  140.559002] sock_sendmsg+0xbc/0xec
[  140.559005] SyS_sendto+0x3a8/0x5a8
[  140.559008] el0_svc_naked+0x34/0x38
[  140.559009]
[  140.592245] page dumped because: kasan: bad access detected
[  140.597981] page_owner info is not active (free page?)
[  140.603267]
[  140.653503] ================================================================

Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/xfrm/xfrm_user.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index b7ac834a6091..026770884d46 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1412,6 +1412,9 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
 		    (ut[i].family != prev_family))
 			return -EINVAL;
 
+		if (ut[i].mode >= XFRM_MODE_MAX)
+			return -EINVAL;
+
 		prev_family = ut[i].family;
 
 		switch (ut[i].family) {
-- 
2.17.1


  parent reply	other threads:[~2018-10-16  4:22 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-16  4:14 [PATCH AUTOSEL 4.9 01/38] xfrm: Validate address prefix lengths in the xfrm selector Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 02/38] xfrm6: call kfree_skb when skb is toobig Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 03/38] mac80211: Always report TX status Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 04/38] cfg80211: reg: Init wiphy_idx in regulatory_hint_core() Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 05/38] mac80211: fix pending queue hang due to TX_DROP Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 06/38] cfg80211: Address some corner cases in scan result channel updating Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 07/38] mac80211: TDLS: fix skb queue/priority assignment Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 08/38] ARM: 8799/1: mm: fix pci_ioremap_io() offset check Sasha Levin
2018-10-16  4:14 ` Sasha Levin [this message]
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 10/38] ARM: dts: BCM63xx: Fix incorrect interrupt specifiers Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 11/38] net: macb: Clean 64b dma addresses if they are not detected Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 12/38] net: hns: fix for unmapping problem when SMMU is on Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 13/38] soc: fsl: qbman: qman: avoid allocating from non existing gen_pool Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 14/38] soc: fsl: qe: Fix copy/paste bug in ucc_get_tdm_sync_shift() Sasha Levin
2018-10-16  4:14 ` [PATCH AUTOSEL 4.9 15/38] nl80211: Fix possible Spectre-v1 for NL80211_TXRATE_HT Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 16/38] mac80211_hwsim: do not omit multicast announce of first added radio Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 17/38] Bluetooth: SMP: fix crash in unpairing Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 18/38] pxa168fb: prepare the clock Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 19/38] qed: Avoid implicit enum conversion in qed_roce_mode_to_flavor Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 20/38] bonding: avoid possible dead-lock Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 21/38] qed: Avoid constant logical operation warning in qed_vf_pf_acquire Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 22/38] bnxt_en: Fix TX timeout during netpoll Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 23/38] asix: Check for supported Wake-on-LAN modes Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 24/38] ax88179_178a: " Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 25/38] lan78xx: " Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 26/38] sr9800: " Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 27/38] r8152: Check for supported Wake-on-LAN Modes Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 28/38] smsc75xx: Check for Wake-on-LAN modes Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 29/38] smsc95xx: " Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 30/38] qlcnic: fix Tx descriptor corruption on 82xx devices Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 31/38] i2c: i2c-scmi: fix for i2c_smbus_write_block_data Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 32/38] perf/ring_buffer: Prevent concurent ring buffer access Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 33/38] perf/x86/intel/uncore: Fix PCI BDF address of M3UPI on SKX Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 34/38] net: fec: fix rare tx timeout Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 35/38] declance: Fix continuation with the adapter identification message Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 36/38] net/usb: cancel pending work when unbinding smsc75xx Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 37/38] net: cxgb3_main: fix a missing-check bug Sasha Levin
2018-10-16  4:15 ` [PATCH AUTOSEL 4.9 38/38] mm/vmstat.c: fix outdated vmstat_text Sasha Levin

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